diff --git a/.github/workflows/test-ci.yml b/.github/workflows/test-ci.yml
index ec6f379..1988185 100644
--- a/.github/workflows/test-ci.yml
+++ b/.github/workflows/test-ci.yml
@@ -14,7 +14,7 @@
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     runs-on: ${{ matrix.os }}
 
     steps:
diff --git a/command.py b/command.py
index 9b1220d..b972a0b 100644
--- a/command.py
+++ b/command.py
@@ -15,7 +15,6 @@
 import multiprocessing
 import os
 import optparse
-import platform
 import re
 import sys
 
@@ -25,6 +24,10 @@
 import progress
 
 
+# Are we generating man-pages?
+GENERATE_MANPAGES = os.environ.get('_REPO_GENERATE_MANPAGES_') == ' indeed! '
+
+
 # Number of projects to submit to a single worker process at a time.
 # This number represents a tradeoff between the overhead of IPC and finer
 # grained opportunity for parallelism. This particular value was chosen by
@@ -43,15 +46,32 @@
   """Base class for any command line action in repo.
   """
 
-  common = False
+  # Singleton for all commands to track overall repo command execution and
+  # provide event summary to callers.  Only used by sync subcommand currently.
+  #
+  # NB: This is being replaced by git trace2 events.  See git_trace2_event_log.
   event_log = EventLog()
-  manifest = None
-  _optparse = None
+
+  # Whether this command is a "common" one, i.e. whether the user would commonly
+  # use it or it's a more uncommon command.  This is used by the help command to
+  # show short-vs-full summaries.
+  COMMON = False
 
   # Whether this command supports running in parallel.  If greater than 0,
   # it is the number of parallel jobs to default to.
   PARALLEL_JOBS = None
 
+  def __init__(self, repodir=None, client=None, manifest=None, gitc_manifest=None,
+               git_event_log=None):
+    self.repodir = repodir
+    self.client = client
+    self.manifest = manifest
+    self.gitc_manifest = gitc_manifest
+    self.git_event_log = git_event_log
+
+    # Cache for the OptionParser property.
+    self._optparse = None
+
   def WantPager(self, _opt):
     return False
 
@@ -106,10 +126,14 @@
                  help='only show errors')
 
     if self.PARALLEL_JOBS is not None:
+      default = 'based on number of CPU cores'
+      if not GENERATE_MANPAGES:
+        # Only include active cpu count if we aren't generating man pages.
+        default = f'%default; {default}'
       p.add_option(
           '-j', '--jobs',
           type=int, default=self.PARALLEL_JOBS,
-          help='number of jobs to run in parallel (default: %s)' % self.PARALLEL_JOBS)
+          help=f'number of jobs to run in parallel (default: {default})')
 
   def _Options(self, p):
     """Initialize the option parser with subcommand-specific options."""
diff --git a/completion.bash b/completion.bash
index 0b52d29..09291d5 100644
--- a/completion.bash
+++ b/completion.bash
@@ -14,6 +14,9 @@
 
 # Programmable bash completion.  https://github.com/scop/bash-completion
 
+# TODO: Handle interspersed options.  We handle `repo h<tab>`, but not
+# `repo --time h<tab>`.
+
 # Complete the list of repo subcommands.
 __complete_repo_list_commands() {
   local repo=${COMP_WORDS[0]}
@@ -37,6 +40,7 @@
 __complete_repo_list_projects() {
   local repo=${COMP_WORDS[0]}
   "${repo}" list -n 2>/dev/null
+  "${repo}" list -p --relative-to=. 2>/dev/null
 }
 
 # Complete the repo <command> argument.
@@ -66,6 +70,48 @@
   COMPREPLY=($(compgen -W "$(__complete_repo_list_projects)" -- "${current}"))
 }
 
+# Complete `repo help`.
+__complete_repo_command_help() {
+  local current=$1
+  # CWORD=1 is "start".
+  # CWORD=2 is the <subcommand> which we complete here.
+  if [[ ${COMP_CWORD} -eq 2 ]]; then
+    COMPREPLY=(
+      $(compgen -W "$(__complete_repo_list_commands)" -- "${current}")
+    )
+  fi
+}
+
+# Complete `repo forall`.
+__complete_repo_command_forall() {
+  local current=$1
+  # CWORD=1 is "forall".
+  # CWORD=2+ are <projects> *until* we hit the -c option.
+  local i
+  for (( i = 0; i < COMP_CWORD; ++i )); do
+    if [[ "${COMP_WORDS[i]}" == "-c" ]]; then
+      return 0
+    fi
+  done
+
+  COMPREPLY=(
+    $(compgen -W "$(__complete_repo_list_projects)" -- "${current}")
+  )
+}
+
+# Complete `repo start`.
+__complete_repo_command_start() {
+  local current=$1
+  # CWORD=1 is "start".
+  # CWORD=2 is the <branch> which we don't complete.
+  # CWORD=3+ are <projects> which we complete here.
+  if [[ ${COMP_CWORD} -gt 2 ]]; then
+    COMPREPLY=(
+      $(compgen -W "$(__complete_repo_list_projects)" -- "${current}")
+    )
+  fi
+}
+
 # Complete the repo subcommand arguments.
 __complete_repo_arg() {
   if [[ ${COMP_CWORD} -le 1 ]]; then
@@ -86,21 +132,8 @@
     return 0
     ;;
 
-  help)
-    if [[ ${COMP_CWORD} -eq 2 ]]; then
-      COMPREPLY=(
-        $(compgen -W "$(__complete_repo_list_commands)" -- "${current}")
-      )
-    fi
-    return 0
-    ;;
-
-  start)
-    if [[ ${COMP_CWORD} -gt 2 ]]; then
-      COMPREPLY=(
-        $(compgen -W "$(__complete_repo_list_projects)" -- "${current}")
-      )
-    fi
+  help|start|forall)
+    __complete_repo_command_${command} "${current}"
     return 0
     ;;
 
@@ -118,4 +151,6 @@
   return 0
 }
 
-complete -F __complete_repo repo
+# Fallback to the default complete methods if we aren't able to provide anything
+# useful.  This will allow e.g. local paths to be used when it makes sense.
+complete -F __complete_repo -o bashdefault -o default repo
diff --git a/docs/internal-fs-layout.md b/docs/internal-fs-layout.md
index 0c59f98..af6a452 100644
--- a/docs/internal-fs-layout.md
+++ b/docs/internal-fs-layout.md
@@ -110,6 +110,8 @@
 [gitsubmodules] with [superprojects].
 ***
 
+*   `copy-link-files.json`: Tracking file used by `repo sync` to determine when
+    copyfile or linkfile are added or removed and need corresponding updates.
 *   `project.list`: Tracking file used by `repo sync` to determine when projects
     are added or removed and need corresponding updates in the checkout.
 *   `projects/`: Bare checkouts of every project synced by the manifest.  The
@@ -144,12 +146,18 @@
 
 The `.repo/manifests.git/config` file is used to track settings for the entire
 repo client checkout.
+
 Most settings use the `[repo]` section to avoid conflicts with git.
+
+Everything under `[repo.syncstate.*]` is used to keep track of sync details for logging
+purposes.
+
 User controlled settings are initialized when running `repo init`.
 
 | Setting                  | `repo init` Option        | Use/Meaning |
 |-------------------       |---------------------------|-------------|
 | manifest.groups          | `--groups` & `--platform` | The manifest groups to sync |
+| manifest.standalone      | `--standalone-manifest`   | Download manifest as static file instead of creating checkout |
 | repo.archive             | `--archive`               | Use `git archive` for checkouts |
 | repo.clonebundle         | `--clone-bundle`          | Whether the initial sync used clone.bundle explicitly |
 | repo.clonefilter         | `--clone-filter`          | Filter setting when using [partial git clones] |
diff --git a/docs/manifest-format.md b/docs/manifest-format.md
index da83d0d..8e0049b 100644
--- a/docs/manifest-format.md
+++ b/docs/manifest-format.md
@@ -31,11 +31,12 @@
                       extend-project*,
                       repo-hooks?,
                       superproject?,
+                      contactinfo?,
                       include*)>
 
   <!ELEMENT notice (#PCDATA)>
 
-  <!ELEMENT remote EMPTY>
+  <!ELEMENT remote (annotation*)>
   <!ATTLIST remote name         ID    #REQUIRED>
   <!ATTLIST remote alias        CDATA #IMPLIED>
   <!ATTLIST remote fetch        CDATA #REQUIRED>
@@ -89,20 +90,26 @@
   <!ELEMENT extend-project EMPTY>
   <!ATTLIST extend-project name CDATA #REQUIRED>
   <!ATTLIST extend-project path CDATA #IMPLIED>
+  <!ATTLIST extend-project dest-path CDATA #IMPLIED>
   <!ATTLIST extend-project groups CDATA #IMPLIED>
   <!ATTLIST extend-project revision CDATA #IMPLIED>
   <!ATTLIST extend-project remote CDATA #IMPLIED>
 
   <!ELEMENT remove-project EMPTY>
   <!ATTLIST remove-project name  CDATA #REQUIRED>
+  <!ATTLIST remove-project optional  CDATA #IMPLIED>
 
   <!ELEMENT repo-hooks EMPTY>
   <!ATTLIST repo-hooks in-project CDATA #REQUIRED>
   <!ATTLIST repo-hooks enabled-list CDATA #REQUIRED>
 
-  <!ELEMENT superproject (EMPTY)>
-  <!ATTLIST superproject name    CDATA #REQUIRED>
-  <!ATTLIST superproject remote  IDREF #IMPLIED>
+  <!ELEMENT superproject EMPTY>
+  <!ATTLIST superproject name     CDATA #REQUIRED>
+  <!ATTLIST superproject remote   IDREF #IMPLIED>
+  <!ATTLIST superproject revision CDATA #IMPLIED>
+
+  <!ELEMENT contactinfo EMPTY>
+  <!ATTLIST contactinfo bugurl  CDATA #REQUIRED>
 
   <!ELEMENT include EMPTY>
   <!ATTLIST include name   CDATA #REQUIRED>
@@ -331,6 +338,11 @@
 Attribute `path`: If specified, limit the change to projects checked out
 at the specified path, rather than all projects with the given name.
 
+Attribute `dest-path`: If specified, a path relative to the top directory
+of the repo client where the Git working directory for this project
+should be placed.  This is used to move a project in the checkout by
+overriding the existing `path` setting.
+
 Attribute `groups`: List of additional groups to which this project
 belongs.  Same syntax as the corresponding element of `project`.
 
@@ -343,12 +355,12 @@
 ### Element annotation
 
 Zero or more annotation elements may be specified as children of a
-project element. Each element describes a name-value pair that will be
-exported into each project's environment during a 'forall' command,
-prefixed with REPO__.  In addition, there is an optional attribute
-"keep" which accepts the case insensitive values "true" (default) or
-"false".  This attribute determines whether or not the annotation will
-be kept when exported with the manifest subcommand.
+project or remote element. Each element describes a name-value pair.
+For projects, this name-value pair will be exported into each project's
+environment during a 'forall' command, prefixed with `REPO__`.  In addition,
+there is an optional attribute "keep" which accepts the case insensitive values
+"true" (default) or "false".  This attribute determines whether or not the
+annotation will be kept when exported with the manifest subcommand.
 
 ### Element copyfile
 
@@ -389,6 +401,9 @@
 the user can remove a project, and possibly replace it with their
 own definition.
 
+Attribute `optional`: Set to true to ignore remove-project elements with no
+matching `project` element.
+
 ### Element repo-hooks
 
 NB: See the [practical documentation](./repo-hooks.md) for using repo hooks.
@@ -405,7 +420,7 @@
 ### Element superproject
 
 ***
- *Note*: This is currently a WIP.
+*Note*: This is currently a WIP.
 ***
 
 NB: See the [git superprojects documentation](
@@ -424,6 +439,24 @@
 Attribute `remote`: Name of a previously defined remote element.
 If not supplied the remote given by the default element is used.
 
+Attribute `revision`: Name of the Git branch the manifest wants
+to track for this superproject. If not supplied the revision given
+by the remote element is used if applicable, else the default
+element is used.
+
+### Element contactinfo
+
+***
+*Note*: This is currently a WIP.
+***
+
+This element is used to let manifest authors self-register contact info.
+It has "bugurl" as a required atrribute. This element can be repeated,
+and any later entries will clobber earlier ones. This would allow manifest
+authors who extend manifests to specify their own contact info.
+
+Attribute `bugurl`: The URL to file a bug against the manifest owner.
+
 ### Element include
 
 This element provides the capability of including another manifest
@@ -468,6 +501,9 @@
 Manifest files stored in `$TOP_DIR/.repo/local_manifests/*.xml` will
 be loaded in alphabetical order.
 
+Projects from local manifest files are added into
+local::<local manifest filename> group.
+
 The legacy `$TOP_DIR/.repo/local_manifest.xml` path is no longer supported.
 
 
diff --git a/docs/release-process.md b/docs/release-process.md
index 43209eb..f71a411 100644
--- a/docs/release-process.md
+++ b/docs/release-process.md
@@ -83,7 +83,8 @@
 *   `--repo-rev`: This tells repo which branch to use for the full project.
     It defaults to the `stable` branch (`REPO_REV` in the launcher script).
 
-Whenever `repo sync` is run, repo will check to see if an update is available.
+Whenever `repo sync` is run, repo will, once every 24 hours, see if an update
+is available.
 It fetches the latest repo-rev from the repo-url.
 Then it verifies that the latest commit in the branch has a valid signed tag
 using `git tag -v` (which uses gpg).
@@ -95,6 +96,11 @@
 
 If that tag cannot be verified, it gives up and forces the user to resolve.
 
+### Force an update
+
+The `repo selfupdate` command can be used to force an immediate update.
+It is not subject to the 24 hour limitation.
+
 ## Branch management
 
 All development happens on the `main` branch and should generally be stable.
@@ -202,80 +208,132 @@
 still support them.
 Things in italics are things we used to care about but probably don't anymore.
 
-|   Date   |     EOL      | [Git][rel-g] | [Python][rel-p] | [Ubuntu][rel-u] / [Debian][rel-d] | Git | Python |
-|:--------:|:------------:|--------------|-----------------|-----------------------------------|-----|--------|
-| Oct 2008 | *Oct 2013*   |              | 2.6.0           | *10.04 Lucid* - 10.10 Maverick / *Squeeze* |
+|   Date   |     EOL      | [Git][rel-g] | [Python][rel-p] | [SSH][rel-o] | [Ubuntu][rel-u] / [Debian][rel-d] | Git | Python | SSH |
+|:--------:|:------------:|:------------:|:---------------:|:------------:|-----------------------------------|-----|--------|-----|
+| Apr 2008 |              |              |                 | 5.0          |
+| Jun 2008 |              |              |                 | 5.1          |
+| Oct 2008 | *Oct 2013*   |              | 2.6.0           |              | *10.04 Lucid* - 10.10 Maverick / *Squeeze* |
 | Dec 2008 | *Feb 2009*   |              | 3.0.0           |
-| Feb 2009 | *Mar 2012*   |              |                 | Debian 5 Lenny       | 1.5.6.5 | 2.5.2 |
-| Jun 2009 | *Jun 2016*   |              | 3.1.0           | *10.04 Lucid* - 10.10 Maverick / *Squeeze* |
-| Feb 2010 | *Oct 2012*   | 1.7.0        |                 | *10.04 Lucid* - *12.04 Precise* - 12.10 Quantal |
-| Apr 2010 | *Apr 2015*   |              |                 | *10.04 Lucid*        | 1.7.0.4  | 2.6.5 3.1.2  |
-| Jul 2010 | *Dec 2019*   |              | **2.7.0**       | 11.04 Natty - **<current>** |
-| Oct 2010 |              |              |                 | 10.10 Maverick       | 1.7.1    | 2.6.6 3.1.3  |
-| Feb 2011 | *Feb 2016*   |              |                 | Debian 6 Squeeze     | 1.7.2.5  | 2.6.6 3.1.3  |
-| Apr 2011 |              |              |                 | 11.04 Natty          | 1.7.4    | 2.7.1 3.2.0  |
-| Oct 2011 | *Feb 2016*   |              | 3.2.0           | 11.04 Natty - 12.10 Quantal |
-| Oct 2011 |              |              |                 | 11.10 Ocelot         | 1.7.5.4  | 2.7.2 3.2.2  |
-| Apr 2012 | *Apr 2019*   |              |                 | *12.04 Precise*      | 1.7.9.5  | 2.7.3 3.2.3  |
-| Sep 2012 | *Sep 2017*   |              | 3.3.0           | 13.04 Raring - 13.10 Saucy |
-| Oct 2012 | *Dec 2014*   | 1.8.0        |                 | 13.04 Raring - 13.10 Saucy |
-| Oct 2012 |              |              |                 | 12.10 Quantal        | 1.7.10.4 | 2.7.3 3.2.3  |
-| Apr 2013 |              |              |                 | 13.04 Raring         | 1.8.1.2  | 2.7.4 3.3.1  |
-| May 2013 | *May 2018*   |              |                 | Debian 7 Wheezy      | 1.7.10.4 | 2.7.3 3.2.3  |
-| Oct 2013 |              |              |                 | 13.10 Saucy          | 1.8.3.2  | 2.7.5 3.3.2  |
-| Feb 2014 | *Dec 2014*   | **1.9.0**    |                 | **14.04 Trusty** |
-| Mar 2014 | *Mar 2019*   |              | **3.4.0**       | **14.04 Trusty** - 15.10 Wily / **Jessie** |
-| Apr 2014 | **Apr 2022** |              |                 | **14.04 Trusty**     | 1.9.1    | 2.7.5 3.4.0  |
+| Feb 2009 |              |              |                 | 5.2          |
+| Feb 2009 | *Mar 2012*   |              |                 |              | Debian 5 Lenny       | 1.5.6.5 | 2.5.2 |
+| Jun 2009 | *Jun 2016*   |              | 3.1.0           |              | *10.04 Lucid* - 10.10 Maverick / *Squeeze* |
+| Sep 2009 |              |              |                 | 5.3          | *10.04 Lucid* |
+| Feb 2010 | *Oct 2012*   | 1.7.0        |                 |              | *10.04 Lucid* - *12.04 Precise* - 12.10 Quantal |
+| Mar 2010 |              |              |                 | 5.4          |
+| Apr 2010 |              |              |                 | 5.5          | 10.10 Maverick |
+| Apr 2010 | *Apr 2015*   |              |                 |              | *10.04 Lucid*        | 1.7.0.4  | 2.6.5 3.1.2  | 5.3 |
+| Jul 2010 | *Dec 2019*   |              | *2.7.0*         |              | 11.04 Natty - *<current>* |
+| Aug 2010 |              |              |                 | 5.6          |
+| Oct 2010 |              |              |                 |              | 10.10 Maverick       | 1.7.1    | 2.6.6 3.1.3  | 5.5 |
+| Jan 2011 |              |              |                 | 5.7          |
+| Feb 2011 |              |              |                 | 5.8          | 11.04 Natty |
+| Feb 2011 | *Feb 2016*   |              |                 |              | Debian 6 Squeeze     | 1.7.2.5  | 2.6.6 3.1.3  |
+| Apr 2011 |              |              |                 |              | 11.04 Natty          | 1.7.4    | 2.7.1 3.2.0  | 5.8 |
+| Sep 2011 |              |              |                 | 5.9          | *12.04 Precise* |
+| Oct 2011 | *Feb 2016*   |              | 3.2.0           |              | 11.04 Natty - 12.10 Quantal |
+| Oct 2011 |              |              |                 |              | 11.10 Ocelot         | 1.7.5.4  | 2.7.2 3.2.2  | 5.8 |
+| Apr 2012 |              |              |                 | 6.0          | 12.10 Quantal |
+| Apr 2012 | *Apr 2019*   |              |                 |              | *12.04 Precise*      | 1.7.9.5  | 2.7.3 3.2.3  | 5.9 |
+| Aug 2012 |              |              |                 | 6.1          | 13.04 Raring |
+| Sep 2012 | *Sep 2017*   |              | 3.3.0           |              | 13.04 Raring - 13.10 Saucy |
+| Oct 2012 | *Dec 2014*   | 1.8.0        |                 |              | 13.04 Raring - 13.10 Saucy |
+| Oct 2012 |              |              |                 |              | 12.10 Quantal        | 1.7.10.4 | 2.7.3 3.2.3  | 6.0 |
+| Mar 2013 |              |              |                 | 6.2          | 13.10 Saucy |
+| Apr 2013 |              |              |                 |              | 13.04 Raring         | 1.8.1.2  | 2.7.4 3.3.1  | 6.1 |
+| May 2013 | *May 2018*   |              |                 |              | Debian 7 Wheezy      | 1.7.10.4 | 2.7.3 3.2.3  |
+| Sep 2013 |              |              |                 | 6.3          |
+| Oct 2013 |              |              |                 |              | 13.10 Saucy          | 1.8.3.2  | 2.7.5 3.3.2  | 6.2 |
+| Nov 2013 |              |              |                 | 6.4          |
+| Jan 2014 |              |              |                 | 6.5          |
+| Feb 2014 | *Dec 2014*   | **1.9.0**    |                 |              | *14.04 Trusty* |
+| Mar 2014 | *Mar 2019*   |              | *3.4.0*         |              | *14.04 Trusty* - 15.10 Wily / *Jessie* |
+| Mar 2014 |              |              |                 | 6.6          | *14.04 Trusty* - 14.10 Utopic |
+| Apr 2014 | *Apr 2022*   |              |                 |              | *14.04 Trusty*       | 1.9.1    | 2.7.5 3.4.0  | 6.6 |
 | May 2014 | *Dec 2014*   | 2.0.0        |
-| Aug 2014 | *Dec 2014*   | **2.1.0**    |                 | 14.10 Utopic - 15.04 Vivid / **Jessie** |
-| Oct 2014 |              |              |                 | 14.10 Utopic         | 2.1.0    | 2.7.8 3.4.2  |
+| Aug 2014 | *Dec 2014*   | *2.1.0*      |                 |              | 14.10 Utopic - 15.04 Vivid / *Jessie* |
+| Oct 2014 |              |              |                 | 6.7          | 15.04 Vivid |
+| Oct 2014 |              |              |                 |              | 14.10 Utopic         | 2.1.0    | 2.7.8 3.4.2  | 6.6 |
 | Nov 2014 | *Sep 2015*   | 2.2.0        |
 | Feb 2015 | *Sep 2015*   | 2.3.0        |
+| Mar 2015 |              |              |                 | 6.8          |
 | Apr 2015 | *May 2017*   | 2.4.0        |
-| Apr 2015 | **Jun 2020** |              |                 | **Debian 8 Jessie**  | 2.1.4    | 2.7.9 3.4.2  |
-| Apr 2015 |              |              |                 | 15.04 Vivid          | 2.1.4    | 2.7.9 3.4.3  |
-| Jul 2015 | *May 2017*   | 2.5.0        |                 | 15.10 Wily |
+| Apr 2015 | *Jun 2020*   |              |                 |              | *Debian 8 Jessie*    | 2.1.4    | 2.7.9 3.4.2  |
+| Apr 2015 |              |              |                 |              | 15.04 Vivid          | 2.1.4    | 2.7.9 3.4.3  | 6.7 |
+| Jul 2015 | *May 2017*   | 2.5.0        |                 |              | 15.10 Wily |
+| Jul 2015 |              |              |                 | 6.9          | 15.10 Wily |
+| Aug 2015 |              |              |                 | 7.0          |
+| Aug 2015 |              |              |                 | 7.1          |
 | Sep 2015 | *May 2017*   | 2.6.0        |
-| Sep 2015 | **Sep 2020** |              | **3.5.0**       | **16.04 Xenial** - 17.04 Zesty / **Stretch** |
-| Oct 2015 |              |              |                 | 15.10 Wily           | 2.5.0    | 2.7.9 3.4.3  |
-| Jan 2016 | *Jul 2017*   | **2.7.0**    |                 | **16.04 Xenial** |
+| Sep 2015 | *Sep 2020*   |              | *3.5.0*         |              | *16.04 Xenial* - 17.04 Zesty / *Stretch* |
+| Oct 2015 |              |              |                 |              | 15.10 Wily           | 2.5.0    | 2.7.9 3.4.3  | 6.9 |
+| Jan 2016 | *Jul 2017*   | *2.7.0*      |                 |              | *16.04 Xenial* |
+| Feb 2016 |              |              |                 | 7.2          | *16.04 Xenial* |
 | Mar 2016 | *Jul 2017*   | 2.8.0        |
-| Apr 2016 | **Apr 2024** |              |                 | **16.04 Xenial**     | 2.7.4    | 2.7.11 3.5.1 |
-| Jun 2016 | *Jul 2017*   | 2.9.0        |                 | 16.10 Yakkety |
+| Apr 2016 | *Apr 2024*   |              |                 |              | *16.04 Xenial*       | 2.7.4    | 2.7.11 3.5.1 | 7.2 |
+| Jun 2016 | *Jul 2017*   | 2.9.0        |                 |              | 16.10 Yakkety |
+| Jul 2016 |              |              |                 | 7.3          | 16.10 Yakkety |
 | Sep 2016 | *Sep 2017*   | 2.10.0       |
-| Oct 2016 |              |              |                 | 16.10 Yakkety        | 2.9.3    | 2.7.11 3.5.1 |
-| Nov 2016 | *Sep 2017*   | **2.11.0**   |                 | 17.04 Zesty / **Stretch** |
-| Dec 2016 | **Dec 2021** |              | **3.6.0**       | 17.10 Artful - **18.04 Bionic** - 18.10 Cosmic |
+| Oct 2016 |              |              |                 |              | 16.10 Yakkety        | 2.9.3    | 2.7.11 3.5.1 | 7.3 |
+| Nov 2016 | *Sep 2017*   | *2.11.0*     |                 |              | 17.04 Zesty / *Stretch* |
+| Dec 2016 | **Dec 2021** |              | **3.6.0**       |              | 17.10 Artful - **18.04 Bionic** - 18.10 Cosmic |
+| Dec 2016 |              |              |                 | 7.4          | 17.04 Zesty / *Debian 9 Stretch* |
 | Feb 2017 | *Sep 2017*   | 2.12.0       |
-| Apr 2017 |              |              |                 | 17.04 Zesty          | 2.11.0   | 2.7.13 3.5.3 |
+| Mar 2017 |              |              |                 | 7.5          | 17.10 Artful |
+| Apr 2017 |              |              |                 |              | 17.04 Zesty          | 2.11.0   | 2.7.13 3.5.3 | 7.4 |
 | May 2017 | *May 2018*   | 2.13.0       |
-| Jun 2017 | **Jun 2022** |              |                 | **Debian 9 Stretch** | 2.11.0   | 2.7.13 3.5.3 |
-| Aug 2017 | *Dec 2019*   | 2.14.0       |                 | 17.10 Artful |
+| Jun 2017 | *Jun 2022*   |              |                 |              | *Debian 9 Stretch*   | 2.11.0   | 2.7.13 3.5.3 | 7.4 |
+| Aug 2017 | *Dec 2019*   | 2.14.0       |                 |              | 17.10 Artful |
 | Oct 2017 | *Dec 2019*   | 2.15.0       |
-| Oct 2017 |              |              |                 | 17.10 Artful         | 2.14.1   | 2.7.14 3.6.3 |
+| Oct 2017 |              |              |                 | 7.6          | **18.04 Bionic** |
+| Oct 2017 |              |              |                 |              | 17.10 Artful         | 2.14.1   | 2.7.14 3.6.3 | 7.5 |
 | Jan 2018 | *Dec 2019*   | 2.16.0       |
-| Apr 2018 | *Dec 2019*   | 2.17.0       |                 | **18.04 Bionic**     |
-| Apr 2018 | **Apr 2028** |              |                 | **18.04 Bionic**     | 2.17.0   | 2.7.15 3.6.5 |
-| Jun 2018 | *Dec 2019*   | 2.18.0       |
-| Jun 2018 | **Jun 2023** |              | 3.7.0           | 19.04 Disco - **20.04 Focal** / **Buster** |
-| Sep 2018 | *Dec 2019*   | 2.19.0       |                 | 18.10 Cosmic |
-| Oct 2018 |              |              |                 | 18.10 Cosmic         | 2.19.1   | 2.7.15 3.6.6 |
-| Dec 2018 | *Dec 2019*   | **2.20.0**   |                 | 19.04 Disco / **Buster** |
-| Feb 2019 | *Dec 2019*   | 2.21.0       |
-| Apr 2019 |              |              |                 | 19.04 Disco          | 2.20.1   | 2.7.16 3.7.3 |
+| Apr 2018 | *Mar 2021*   | **2.17.0**   |                 |              | **18.04 Bionic**     |
+| Apr 2018 |              |              |                 | 7.7          | 18.10 Cosmic |
+| Apr 2018 | **Apr 2028** |              |                 |              | **18.04 Bionic**     | 2.17.0   | 2.7.15 3.6.5 | 7.6 |
+| Jun 2018 | *Mar 2021*   | 2.18.0       |
+| Jun 2018 | **Jun 2023** |              | 3.7.0           |              | 19.04 Disco - **20.04 Focal** / **Buster** |
+| Aug 2018 |              |              |                 | 7.8          |
+| Sep 2018 | *Mar 2021*   | 2.19.0       |                 |              | 18.10 Cosmic |
+| Oct 2018 |              |              |                 | 7.9          | 19.04 Disco / **Buster** |
+| Oct 2018 |              |              |                 |              | 18.10 Cosmic         | 2.19.1   | 2.7.15 3.6.6 | 7.7 |
+| Dec 2018 | *Mar 2021*   | **2.20.0**   |                 |              | 19.04 Disco - 19.10 Eoan / **Buster** |
+| Feb 2019 | *Mar 2021*   | 2.21.0       |
+| Apr 2019 |              |              |                 | 8.0          | 19.10 Eoan |
+| Apr 2019 |              |              |                 |              | 19.04 Disco          | 2.20.1   | 2.7.16 3.7.3 | 7.9 |
 | Jun 2019 |              | 2.22.0       |
-| Jul 2019 | **Jul 2024** |              |                 | **Debian 10 Buster** | 2.20.1   | 2.7.16 3.7.3 |
-| Aug 2019 |              | 2.23.0       |
-| Oct 2019 | **Oct 2024** |              | 3.8.0           |
-| Oct 2019 |              |              |                 | 19.10 Eoan           | 2.20.1   | 2.7.17 3.7.5 |
-| Nov 2019 |              | 2.24.0       |
-| Jan 2020 |              | 2.25.0       |                 | **20.04 Focal** |
-| Apr 2020 | **Apr 2030** |              |                 | **20.04 Focal**      | 2.25.0   | 2.7.17 3.7.5 |
+| Jul 2019 | **Jul 2024** |              |                 |              | **Debian 10 Buster** | 2.20.1   | 2.7.16 3.7.3 | 7.9 |
+| Aug 2019 | *Mar 2021*   | 2.23.0       |
+| Oct 2019 | **Oct 2024** |              | 3.8.0           |              | **20.04 Focal** - 20.10 Groovy |
+| Oct 2019 |              |              |                 | 8.1          |
+| Oct 2019 |              |              |                 |              | 19.10 Eoan           | 2.20.1   | 2.7.17 3.7.5 | 8.0 |
+| Nov 2019 | *Mar 2021*   | 2.24.0       |
+| Jan 2020 | *Mar 2021*   | 2.25.0       |                 |              | **20.04 Focal** |
+| Feb 2020 |              |              |                 | 8.2          | **20.04 Focal** |
+| Mar 2020 | *Mar 2021*   | 2.26.0       |
+| Apr 2020 | **Apr 2030** |              |                 |              | **20.04 Focal**      | 2.25.1   | 2.7.17 3.8.2 | 8.2 |
+| May 2020 | *Mar 2021*   | 2.27.0       |                 |              | 20.10 Groovy |
+| May 2020 |              |              |                 | 8.3          |
+| Jul 2020 | *Mar 2021*   | 2.28.0       |
+| Sep 2020 |              |              |                 | 8.4          | 21.04 Hirsute / **Bullseye** |
+| Oct 2020 | *Mar 2021*   | 2.29.0       |
+| Oct 2020 |              |              |                 |              | 20.10 Groovy         | 2.27.0   | 2.7.18 3.8.6 | 8.3 |
+| Oct 2020 | **Oct 2025** |              | 3.9.0           |              | 21.04 Hirsute / **Bullseye** |
+| Dec 2020 | *Mar 2021*   | 2.30.0       |                 |              | 21.04 Hirsute / **Bullseye** |
+| Mar 2021 |              | 2.31.0       |
+| Mar 2021 |              |              |                 | 8.5          |
+| Apr 2021 |              |              |                 | 8.6          |
+| Apr 2021 | *Jan 2022*   |              |                 |              | 21.04 Hirsute        | 2.30.2   | 2.7.18 3.9.4 | 8.4 |
+| Jun 2021 |              | 2.32.0       |
+| Aug 2021 |              | 2.33.0       |
+| Aug 2021 |              |              |                 | 8.7          |
+| Aug 2021 | **Aug 2026** |              |                 |              | **Debian 11 Bullseye** | 2.30.2 | 2.7.18 3.9.2 | 8.4 |
+| **Date** |   **EOL**    | **[Git][rel-g]** | **[Python][rel-p]** | **[SSH][rel-o]** | **[Ubuntu][rel-u] / [Debian][rel-d]** | **Git** | **Python** | **SSH** |
 
 
 [contact]: ../README.md#contact
 [rel-d]: https://en.wikipedia.org/wiki/Debian_version_history
 [rel-g]: https://en.wikipedia.org/wiki/Git#Releases
+[rel-o]: https://www.openssh.com/releasenotes.html
 [rel-p]: https://en.wikipedia.org/wiki/History_of_Python#Table_of_versions
 [rel-u]: https://en.wikipedia.org/wiki/Ubuntu_version_history#Table_of_versions
 [example announcement]: https://groups.google.com/d/topic/repo-discuss/UGBNismWo1M/discussion
diff --git a/error.py b/error.py
index 25ff80d..cbefcb7 100644
--- a/error.py
+++ b/error.py
@@ -13,10 +13,6 @@
 # limitations under the License.
 
 
-# URL to file bug reports for repo tool issues.
-BUG_REPORT_URL = 'https://bugs.chromium.org/p/gerrit/issues/entry?template=Repo+tool+issue'
-
-
 class ManifestParseError(Exception):
   """Failed to parse the manifest file.
   """
diff --git a/fetch.py b/fetch.py
new file mode 100644
index 0000000..91d40cd
--- /dev/null
+++ b/fetch.py
@@ -0,0 +1,41 @@
+# Copyright (C) 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""This module contains functions used to fetch files from various sources."""
+
+import subprocess
+import sys
+from urllib.parse import urlparse
+
+def fetch_file(url):
+  """Fetch a file from the specified source using the appropriate protocol.
+
+  Returns:
+    The contents of the file as bytes.
+  """
+  scheme = urlparse(url).scheme
+  if scheme == 'gs':
+    cmd = ['gsutil', 'cat', url]
+    try:
+      result = subprocess.run(
+          cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+      return result.stdout
+    except subprocess.CalledProcessError as e:
+      print('fatal: error running "gsutil": %s' % e.output,
+            file=sys.stderr)
+    sys.exit(1)
+  if scheme == 'file':
+    with open(url[len('file://'):], 'rb') as f:
+      return f.read()
+  raise ValueError('unsupported url %s' % url)
diff --git a/git_command.py b/git_command.py
index d06fc77..95db91f 100644
--- a/git_command.py
+++ b/git_command.py
@@ -12,12 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import functools
 import os
-import re
 import sys
 import subprocess
-import tempfile
-from signal import SIGTERM
 
 from error import GitError
 from git_refs import HEAD
@@ -42,101 +40,15 @@
 LAST_GITDIR = None
 LAST_CWD = None
 
-_ssh_proxy_path = None
-_ssh_sock_path = None
-_ssh_clients = []
-_ssh_version = None
-
-
-def _run_ssh_version():
-  """run ssh -V to display the version number"""
-  return subprocess.check_output(['ssh', '-V'], stderr=subprocess.STDOUT).decode()
-
-
-def _parse_ssh_version(ver_str=None):
-  """parse a ssh version string into a tuple"""
-  if ver_str is None:
-    ver_str = _run_ssh_version()
-  m = re.match(r'^OpenSSH_([0-9.]+)(p[0-9]+)?\s', ver_str)
-  if m:
-    return tuple(int(x) for x in m.group(1).split('.'))
-  else:
-    return ()
-
-
-def ssh_version():
-  """return ssh version as a tuple"""
-  global _ssh_version
-  if _ssh_version is None:
-    try:
-      _ssh_version = _parse_ssh_version()
-    except subprocess.CalledProcessError:
-      print('fatal: unable to detect ssh version', file=sys.stderr)
-      sys.exit(1)
-  return _ssh_version
-
-
-def ssh_sock(create=True):
-  global _ssh_sock_path
-  if _ssh_sock_path is None:
-    if not create:
-      return None
-    tmp_dir = '/tmp'
-    if not os.path.exists(tmp_dir):
-      tmp_dir = tempfile.gettempdir()
-    if ssh_version() < (6, 7):
-      tokens = '%r@%h:%p'
-    else:
-      tokens = '%C'  # hash of %l%h%p%r
-    _ssh_sock_path = os.path.join(
-        tempfile.mkdtemp('', 'ssh-', tmp_dir),
-        'master-' + tokens)
-  return _ssh_sock_path
-
-
-def _ssh_proxy():
-  global _ssh_proxy_path
-  if _ssh_proxy_path is None:
-    _ssh_proxy_path = os.path.join(
-        os.path.dirname(__file__),
-        'git_ssh')
-  return _ssh_proxy_path
-
-
-def _add_ssh_client(p):
-  _ssh_clients.append(p)
-
-
-def _remove_ssh_client(p):
-  try:
-    _ssh_clients.remove(p)
-  except ValueError:
-    pass
-
-
-def terminate_ssh_clients():
-  global _ssh_clients
-  for p in _ssh_clients:
-    try:
-      os.kill(p.pid, SIGTERM)
-      p.wait()
-    except OSError:
-      pass
-  _ssh_clients = []
-
-
-_git_version = None
-
 
 class _GitCall(object):
+  @functools.lru_cache(maxsize=None)
   def version_tuple(self):
-    global _git_version
-    if _git_version is None:
-      _git_version = Wrapper().ParseGitVersion()
-      if _git_version is None:
-        print('fatal: unable to detect git version', file=sys.stderr)
-        sys.exit(1)
-    return _git_version
+    ret = Wrapper().ParseGitVersion()
+    if ret is None:
+      print('fatal: unable to detect git version', file=sys.stderr)
+      sys.exit(1)
+    return ret
 
   def __getattr__(self, name):
     name = name.replace('_', '-')
@@ -163,7 +75,8 @@
     proj = os.path.dirname(os.path.abspath(__file__))
     env[GIT_DIR] = os.path.join(proj, '.git')
     result = subprocess.run([GIT, 'describe', HEAD], stdout=subprocess.PIPE,
-                            encoding='utf-8', env=env, check=False)
+                            stderr=subprocess.DEVNULL, encoding='utf-8',
+                            env=env, check=False)
     if result.returncode == 0:
       ver = result.stdout.strip()
       if ver.startswith('v'):
@@ -254,7 +167,7 @@
                capture_stderr=False,
                merge_output=False,
                disable_editor=False,
-               ssh_proxy=False,
+               ssh_proxy=None,
                cwd=None,
                gitdir=None):
     env = self._GetBasicEnv()
@@ -262,8 +175,8 @@
     if disable_editor:
       env['GIT_EDITOR'] = ':'
     if ssh_proxy:
-      env['REPO_SSH_SOCK'] = ssh_sock()
-      env['GIT_SSH'] = _ssh_proxy()
+      env['REPO_SSH_SOCK'] = ssh_proxy.sock()
+      env['GIT_SSH'] = ssh_proxy.proxy
       env['GIT_SSH_VARIANT'] = 'ssh'
     if 'http_proxy' in env and 'darwin' == sys.platform:
       s = "'http.proxy=%s'" % (env['http_proxy'],)
@@ -346,7 +259,7 @@
       raise GitError('%s: %s' % (command[1], e))
 
     if ssh_proxy:
-      _add_ssh_client(p)
+      ssh_proxy.add_client(p)
 
     self.process = p
     if input:
@@ -358,7 +271,8 @@
     try:
       self.stdout, self.stderr = p.communicate()
     finally:
-      _remove_ssh_client(p)
+      if ssh_proxy:
+        ssh_proxy.remove_client(p)
     self.rc = p.wait()
 
   @staticmethod
diff --git a/git_config.py b/git_config.py
index fcd0446..3cd0939 100644
--- a/git_config.py
+++ b/git_config.py
@@ -13,32 +13,28 @@
 # limitations under the License.
 
 import contextlib
+import datetime
 import errno
 from http.client import HTTPException
 import json
 import os
 import re
-import signal
 import ssl
 import subprocess
 import sys
-try:
-  import threading as _threading
-except ImportError:
-  import dummy_threading as _threading
-import time
 import urllib.error
 import urllib.request
 
 from error import GitError, UploadError
 import platform_utils
 from repo_trace import Trace
-
 from git_command import GitCommand
-from git_command import ssh_sock
-from git_command import terminate_ssh_clients
 from git_refs import R_CHANGES, R_HEADS, R_TAGS
 
+# Prefix that is prepended to all the keys of SyncAnalysisState's data
+# that is saved in the config.
+SYNC_STATE_PREFIX = 'repo.syncstate.'
+
 ID_RE = re.compile(r'^[0-9a-f]{40}$')
 
 REVIEW_CACHE = dict()
@@ -74,6 +70,15 @@
 
   _USER_CONFIG = '~/.gitconfig'
 
+  _ForSystem = None
+  _SYSTEM_CONFIG = '/etc/gitconfig'
+
+  @classmethod
+  def ForSystem(cls):
+    if cls._ForSystem is None:
+      cls._ForSystem = cls(configfile=cls._SYSTEM_CONFIG)
+    return cls._ForSystem
+
   @classmethod
   def ForUser(cls):
     if cls._ForUser is None:
@@ -99,6 +104,10 @@
           os.path.dirname(self.file),
           '.repo_' + os.path.basename(self.file) + '.json')
 
+  def ClearCache(self):
+    """Clear the in-memory cache of config."""
+    self._cache_dict = None
+
   def Has(self, name, include_defaults=True):
     """Return true if this configuration file has the key.
     """
@@ -262,6 +271,22 @@
       self._branches[b.name] = b
     return b
 
+  def GetSyncAnalysisStateData(self):
+    """Returns data to be logged for the analysis of sync performance."""
+    return {k: v for k, v in self.DumpConfigDict().items() if k.startswith(SYNC_STATE_PREFIX)}
+
+  def UpdateSyncAnalysisState(self, options, superproject_logging_data):
+    """Update Config's SYNC_STATE_PREFIX* data with the latest sync data.
+
+    Args:
+      options: Options passed to sync returned from optparse. See _Options().
+      superproject_logging_data: A dictionary of superproject data that is to be logged.
+
+    Returns:
+      SyncAnalysisState object.
+    """
+    return SyncAnalysisState(self, options, superproject_logging_data)
+
   def GetSubSections(self, section):
     """List all subsection names matching $section.*.*
     """
@@ -327,8 +352,8 @@
       Trace(': parsing %s', self.file)
       with open(self._json) as fd:
         return json.load(fd)
-    except (IOError, ValueError):
-      platform_utils.remove(self._json)
+    except (IOError, ValueErrorl):
+      platform_utils.remove(self._json, missing_ok=True)
       return None
 
   def _SaveJson(self, cache):
@@ -336,8 +361,7 @@
       with open(self._json, 'w') as fd:
         json.dump(cache, fd, indent=2)
     except (IOError, TypeError):
-      if os.path.exists(self._json):
-        platform_utils.remove(self._json)
+      platform_utils.remove(self._json, missing_ok=True)
 
   def _ReadGit(self):
     """
@@ -347,9 +371,10 @@
 
     """
     c = {}
-    d = self._do('--null', '--list')
-    if d is None:
+    if not os.path.exists(self.file):
       return c
+
+    d = self._do('--null', '--list')
     for line in d.rstrip('\0').split('\0'):
       if '\n' in line:
         key, val = line.split('\n', 1)
@@ -365,7 +390,10 @@
     return c
 
   def _do(self, *args):
-    command = ['config', '--file', self.file, '--includes']
+    if self.file == self._SYSTEM_CONFIG:
+      command = ['config', '--system', '--includes']
+    else:
+      command = ['config', '--file', self.file, '--includes']
     command.extend(args)
 
     p = GitCommand(None,
@@ -375,7 +403,7 @@
     if p.Wait() == 0:
       return p.stdout
     else:
-      GitError('git config %s: %s' % (str(args), p.stderr))
+      raise GitError('git config %s: %s' % (str(args), p.stderr))
 
 
 class RepoConfig(GitConfig):
@@ -440,129 +468,6 @@
     return s
 
 
-_master_processes = []
-_master_keys = set()
-_ssh_master = True
-_master_keys_lock = None
-
-
-def init_ssh():
-  """Should be called once at the start of repo to init ssh master handling.
-
-  At the moment, all we do is to create our lock.
-  """
-  global _master_keys_lock
-  assert _master_keys_lock is None, "Should only call init_ssh once"
-  _master_keys_lock = _threading.Lock()
-
-
-def _open_ssh(host, port=None):
-  global _ssh_master
-
-  # Bail before grabbing the lock if we already know that we aren't going to
-  # try creating new masters below.
-  if sys.platform in ('win32', 'cygwin'):
-    return False
-
-  # Acquire the lock.  This is needed to prevent opening multiple masters for
-  # the same host when we're running "repo sync -jN" (for N > 1) _and_ the
-  # manifest <remote fetch="ssh://xyz"> specifies a different host from the
-  # one that was passed to repo init.
-  _master_keys_lock.acquire()
-  try:
-
-    # Check to see whether we already think that the master is running; if we
-    # think it's already running, return right away.
-    if port is not None:
-      key = '%s:%s' % (host, port)
-    else:
-      key = host
-
-    if key in _master_keys:
-      return True
-
-    if not _ssh_master or 'GIT_SSH' in os.environ:
-      # Failed earlier, so don't retry.
-      return False
-
-    # We will make two calls to ssh; this is the common part of both calls.
-    command_base = ['ssh',
-                    '-o', 'ControlPath %s' % ssh_sock(),
-                    host]
-    if port is not None:
-      command_base[1:1] = ['-p', str(port)]
-
-    # Since the key wasn't in _master_keys, we think that master isn't running.
-    # ...but before actually starting a master, we'll double-check.  This can
-    # be important because we can't tell that that 'git@myhost.com' is the same
-    # as 'myhost.com' where "User git" is setup in the user's ~/.ssh/config file.
-    check_command = command_base + ['-O', 'check']
-    try:
-      Trace(': %s', ' '.join(check_command))
-      check_process = subprocess.Popen(check_command,
-                                       stdout=subprocess.PIPE,
-                                       stderr=subprocess.PIPE)
-      check_process.communicate()  # read output, but ignore it...
-      isnt_running = check_process.wait()
-
-      if not isnt_running:
-        # Our double-check found that the master _was_ infact running.  Add to
-        # the list of keys.
-        _master_keys.add(key)
-        return True
-    except Exception:
-      # Ignore excpetions.  We we will fall back to the normal command and print
-      # to the log there.
-      pass
-
-    command = command_base[:1] + ['-M', '-N'] + command_base[1:]
-    try:
-      Trace(': %s', ' '.join(command))
-      p = subprocess.Popen(command)
-    except Exception as e:
-      _ssh_master = False
-      print('\nwarn: cannot enable ssh control master for %s:%s\n%s'
-            % (host, port, str(e)), file=sys.stderr)
-      return False
-
-    time.sleep(1)
-    ssh_died = (p.poll() is not None)
-    if ssh_died:
-      return False
-
-    _master_processes.append(p)
-    _master_keys.add(key)
-    return True
-  finally:
-    _master_keys_lock.release()
-
-
-def close_ssh():
-  global _master_keys_lock
-
-  terminate_ssh_clients()
-
-  for p in _master_processes:
-    try:
-      os.kill(p.pid, signal.SIGTERM)
-      p.wait()
-    except OSError:
-      pass
-  del _master_processes[:]
-  _master_keys.clear()
-
-  d = ssh_sock(create=False)
-  if d:
-    try:
-      platform_utils.rmdir(os.path.dirname(d))
-    except OSError:
-      pass
-
-  # We're done with the lock, so we can delete it.
-  _master_keys_lock = None
-
-
-URI_SCP = re.compile(r'^([^@:]*@?[^:/]{1,}):')
 URI_ALL = re.compile(r'^([a-z][a-z+-]*)://([^@/]*@?[^/]*)/')
 
 
@@ -614,27 +519,6 @@
   yield cookiefile, None
 
 
-def _preconnect(url):
-  m = URI_ALL.match(url)
-  if m:
-    scheme = m.group(1)
-    host = m.group(2)
-    if ':' in host:
-      host, port = host.split(':')
-    else:
-      port = None
-    if scheme in ('ssh', 'git+ssh', 'ssh+git'):
-      return _open_ssh(host, port)
-    return False
-
-  m = URI_SCP.match(url)
-  if m:
-    host = m.group(1)
-    return _open_ssh(host)
-
-  return False
-
-
 class Remote(object):
   """Configuration options related to a remote.
   """
@@ -671,9 +555,23 @@
 
     return self.url.replace(longest, longestUrl, 1)
 
-  def PreConnectFetch(self):
+  def PreConnectFetch(self, ssh_proxy):
+    """Run any setup for this remote before we connect to it.
+
+    In practice, if the remote is using SSH, we'll attempt to create a new
+    SSH master session to it for reuse across projects.
+
+    Args:
+      ssh_proxy: The SSH settings for managing master sessions.
+
+    Returns:
+      Whether the preconnect phase for this remote was successful.
+    """
+    if not ssh_proxy:
+      return True
+
     connectionUrl = self._InsteadOf()
-    return _preconnect(connectionUrl)
+    return ssh_proxy.preconnect(connectionUrl)
 
   def ReviewUrl(self, userEmail, validate_certs):
     if self._review_url is None:
@@ -844,3 +742,70 @@
   def _Get(self, key, all_keys=False):
     key = 'branch.%s.%s' % (self.name, key)
     return self._config.GetString(key, all_keys=all_keys)
+
+
+class SyncAnalysisState:
+  """Configuration options related to logging of sync state for analysis.
+
+  This object is versioned.
+  """
+  def __init__(self, config, options, superproject_logging_data):
+    """Initializes SyncAnalysisState.
+
+    Saves the following data into the |config| object.
+    - sys.argv, options, superproject's logging data.
+    - repo.*, branch.* and remote.* parameters from config object.
+    - Current time as synctime.
+    - Version number of the object.
+
+    All the keys saved by this object are prepended with SYNC_STATE_PREFIX.
+
+    Args:
+      config: GitConfig object to store all options.
+      options: Options passed to sync returned from optparse. See _Options().
+      superproject_logging_data: A dictionary of superproject data that is to be logged.
+    """
+    self._config = config
+    now = datetime.datetime.utcnow()
+    self._Set('main.synctime', now.isoformat() + 'Z')
+    self._Set('main.version', '1')
+    self._Set('sys.argv', sys.argv)
+    for key, value in superproject_logging_data.items():
+      self._Set(f'superproject.{key}', value)
+    for key, value in options.__dict__.items():
+      self._Set(f'options.{key}', value)
+    config_items = config.DumpConfigDict().items()
+    EXTRACT_NAMESPACES = {'repo', 'branch', 'remote'}
+    self._SetDictionary({k: v for k, v in config_items
+                         if not k.startswith(SYNC_STATE_PREFIX) and
+                         k.split('.', 1)[0] in EXTRACT_NAMESPACES})
+
+  def _SetDictionary(self, data):
+    """Save all key/value pairs of |data| dictionary.
+
+    Args:
+      data: A dictionary whose key/value are to be saved.
+    """
+    for key, value in data.items():
+      self._Set(key, value)
+
+  def _Set(self, key, value):
+    """Set the |value| for a |key| in the |_config| member.
+
+    |key| is prepended with the value of SYNC_STATE_PREFIX constant.
+
+    Args:
+      key: Name of the key.
+      value: |value| could be of any type. If it is 'bool', it will be saved
+             as a Boolean and for all other types, it will be saved as a String.
+    """
+    if value is None:
+      return
+    sync_key = f'{SYNC_STATE_PREFIX}{key}'
+    sync_key = sync_key.replace('_', '')
+    if isinstance(value, str):
+      self._config.SetString(sync_key, value)
+    elif isinstance(value, bool):
+      self._config.SetBoolean(sync_key, value)
+    else:
+      self._config.SetString(sync_key, str(value))
diff --git a/git_superproject.py b/git_superproject.py
index 8932097..4ca84a5 100644
--- a/git_superproject.py
+++ b/git_superproject.py
@@ -19,21 +19,52 @@
 
 Examples:
   superproject = Superproject()
-  project_commit_ids = superproject.UpdateProjectsRevisionId(projects)
+  UpdateProjectsResult = superproject.UpdateProjectsRevisionId(projects)
 """
 
 import hashlib
+import functools
 import os
 import sys
+import time
+from typing import NamedTuple
 
-from error import BUG_REPORT_URL
-from git_command import GitCommand
+from git_command import git_require, GitCommand
+from git_config import RepoConfig
 from git_refs import R_HEADS
+from manifest_xml import LOCAL_MANIFEST_GROUP_PREFIX
 
 _SUPERPROJECT_GIT_NAME = 'superproject.git'
 _SUPERPROJECT_MANIFEST_NAME = 'superproject_override.xml'
 
 
+class SyncResult(NamedTuple):
+  """Return the status of sync and whether caller should exit."""
+
+  # Whether the superproject sync was successful.
+  success: bool
+  # Whether the caller should exit.
+  fatal: bool
+
+
+class CommitIdsResult(NamedTuple):
+  """Return the commit ids and whether caller should exit."""
+
+  # A dictionary with the projects/commit ids on success, otherwise None.
+  commit_ids: dict
+  # Whether the caller should exit.
+  fatal: bool
+
+
+class UpdateProjectsResult(NamedTuple):
+  """Return the overriding manifest file and whether caller should exit."""
+
+  # Path name of the overriding manifest file if successful, otherwise None.
+  manifest_path: str
+  # Whether the caller should exit.
+  fatal: bool
+
+
 class Superproject(object):
   """Get commit ids from superproject.
 
@@ -41,21 +72,25 @@
   lookup of commit ids for all projects. It contains _project_commit_ids which
   is a dictionary with project/commit id entries.
   """
-  def __init__(self, manifest, repodir, superproject_dir='exp-superproject',
-               quiet=False):
+  def __init__(self, manifest, repodir, git_event_log,
+               superproject_dir='exp-superproject', quiet=False, print_messages=False):
     """Initializes superproject.
 
     Args:
       manifest: A Manifest object that is to be written to a file.
       repodir: Path to the .repo/ dir for holding all internal checkout state.
           It must be in the top directory of the repo client checkout.
+      git_event_log: A git trace2 event log to log events.
       superproject_dir: Relative path under |repodir| to checkout superproject.
       quiet:  If True then only print the progress messages.
+      print_messages: if True then print error/warning messages.
     """
     self._project_commit_ids = None
     self._manifest = manifest
+    self._git_event_log = git_event_log
     self._quiet = quiet
-    self._branch = self._GetBranch()
+    self._print_messages = print_messages
+    self._branch = manifest.branch
     self._repodir = os.path.abspath(repodir)
     self._superproject_dir = superproject_dir
     self._superproject_path = os.path.join(self._repodir, superproject_dir)
@@ -63,8 +98,12 @@
                                        _SUPERPROJECT_MANIFEST_NAME)
     git_name = ''
     if self._manifest.superproject:
-      remote_name = self._manifest.superproject['remote'].name
-      git_name = hashlib.md5(remote_name.encode('utf8')).hexdigest() + '-'
+      remote = self._manifest.superproject['remote']
+      git_name = hashlib.md5(remote.name.encode('utf8')).hexdigest() + '-'
+      self._branch = self._manifest.superproject['revision']
+      self._remote_url = remote.url
+    else:
+      self._remote_url = None
     self._work_git_name = git_name + _SUPERPROJECT_GIT_NAME
     self._work_git = os.path.join(self._superproject_path, self._work_git_name)
 
@@ -73,16 +112,28 @@
     """Returns a dictionary of projects and their commit ids."""
     return self._project_commit_ids
 
-  def _GetBranch(self):
-    """Returns the branch name for getting the approved manifest."""
-    p = self._manifest.manifestProject
-    b = p.GetBranch(p.CurrentBranch)
-    if not b:
-      return None
-    branch = b.merge
-    if branch and branch.startswith(R_HEADS):
-      branch = branch[len(R_HEADS):]
-    return branch
+  @property
+  def manifest_path(self):
+    """Returns the manifest path if the path exists or None."""
+    return self._manifest_path if os.path.exists(self._manifest_path) else None
+
+  def _LogMessage(self, message):
+    """Logs message to stderr and _git_event_log."""
+    if self._print_messages:
+      print(message, file=sys.stderr)
+    self._git_event_log.ErrorEvent(message, f'{message}')
+
+  def _LogMessagePrefix(self):
+    """Returns the prefix string to be logged in each log message"""
+    return f'repo superproject branch: {self._branch} url: {self._remote_url}'
+
+  def _LogError(self, message):
+    """Logs error message to stderr and _git_event_log."""
+    self._LogMessage(f'{self._LogMessagePrefix()} error: {message}')
+
+  def _LogWarning(self, message):
+    """Logs warning message to stderr and _git_event_log."""
+    self._LogMessage(f'{self._LogMessagePrefix()} warning: {message}')
 
   def _Init(self):
     """Sets up a local Git repository to get a copy of a superproject.
@@ -103,25 +154,25 @@
                    capture_stderr=True)
     retval = p.Wait()
     if retval:
-      print('repo: error: git init call failed with return code: %r, stderr: %r' %
-            (retval, p.stderr), file=sys.stderr)
+      self._LogWarning(f'git init call failed, command: git {cmd}, '
+                       f'return code: {retval}, stderr: {p.stderr}')
       return False
     return True
 
-  def _Fetch(self, url):
-    """Fetches a local copy of a superproject for the manifest based on url.
-
-    Args:
-      url: superproject's url.
+  def _Fetch(self):
+    """Fetches a local copy of a superproject for the manifest based on |_remote_url|.
 
     Returns:
       True if fetch is successful, or False.
     """
     if not os.path.exists(self._work_git):
-      print('git fetch missing drectory: %s' % self._work_git,
-            file=sys.stderr)
+      self._LogWarning(f'git fetch missing directory: {self._work_git}')
       return False
-    cmd = ['fetch', url, '--depth', '1', '--force', '--no-tags', '--filter', 'blob:none']
+    if not git_require((2, 28, 0)):
+      self._LogWarning('superproject requires a git version 2.28 or later')
+      return False
+    cmd = ['fetch', self._remote_url, '--depth', '1', '--force', '--no-tags',
+           '--filter', 'blob:none']
     if self._branch:
       cmd += [self._branch + ':' + self._branch]
     p = GitCommand(None,
@@ -131,8 +182,8 @@
                    capture_stderr=True)
     retval = p.Wait()
     if retval:
-      print('repo: error: git fetch call failed with return code: %r, stderr: %r' %
-            (retval, p.stderr), file=sys.stderr)
+      self._LogWarning(f'git fetch call failed, command: git {cmd}, '
+                       f'return code: {retval}, stderr: {p.stderr}')
       return False
     return True
 
@@ -145,8 +196,7 @@
       data: data returned from 'git ls-tree ...' instead of None.
     """
     if not os.path.exists(self._work_git):
-      print('git ls-tree missing drectory: %s' % self._work_git,
-            file=sys.stderr)
+      self._LogWarning(f'git ls-tree missing directory: {self._work_git}')
       return None
     data = None
     branch = 'HEAD' if not self._branch else self._branch
@@ -161,52 +211,52 @@
     if retval == 0:
       data = p.stdout
     else:
-      print('repo: error: git ls-tree call failed with return code: %r, stderr: %r' % (
-          retval, p.stderr), file=sys.stderr)
+      self._LogWarning(f'git ls-tree call failed, command: git {cmd}, '
+                       f'return code: {retval}, stderr: {p.stderr}')
     return data
 
   def Sync(self):
     """Gets a local copy of a superproject for the manifest.
 
     Returns:
-      True if sync of superproject is successful, or False.
+      SyncResult
     """
-    print('WARNING: --use-superproject is experimental and not '
-          'for general use', file=sys.stderr)
-
     if not self._manifest.superproject:
-      print('error: superproject tag is not defined in manifest',
-            file=sys.stderr)
-      return False
+      self._LogWarning(f'superproject tag is not defined in manifest: '
+                       f'{self._manifest.manifestFile}')
+      return SyncResult(False, False)
 
-    url = self._manifest.superproject['remote'].url
-    if not url:
-      print('error: superproject URL is not defined in manifest',
-            file=sys.stderr)
-      return False
+    print('NOTICE: --use-superproject is in beta; report any issues to the '
+          'address described in `repo version`', file=sys.stderr)
+    should_exit = True
+    if not self._remote_url:
+      self._LogWarning(f'superproject URL is not defined in manifest: '
+                       f'{self._manifest.manifestFile}')
+      return SyncResult(False, should_exit)
 
     if not self._Init():
-      return False
-    if not self._Fetch(url):
-      return False
+      return SyncResult(False, should_exit)
+    if not self._Fetch():
+      return SyncResult(False, should_exit)
     if not self._quiet:
       print('%s: Initial setup for superproject completed.' % self._work_git)
-    return True
+    return SyncResult(True, False)
 
   def _GetAllProjectsCommitIds(self):
     """Get commit ids for all projects from superproject and save them in _project_commit_ids.
 
     Returns:
-      A dictionary with the projects/commit ids on success, otherwise None.
+      CommitIdsResult
     """
-    if not self.Sync():
-      return None
+    sync_result = self.Sync()
+    if not sync_result.success:
+      return CommitIdsResult(None, sync_result.fatal)
 
     data = self._LsTree()
     if not data:
-      print('error: git ls-tree failed to return data for superproject',
-            file=sys.stderr)
-      return None
+      self._LogWarning(f'git ls-tree failed to return data for manifest: '
+                       f'{self._manifest.manifestFile}')
+      return CommitIdsResult(None, True)
 
     # Parse lines like the following to select lines starting with '160000' and
     # build a dictionary with project path (last element) and its commit id (3rd element).
@@ -222,18 +272,16 @@
         commit_ids[ls_data[3]] = ls_data[2]
 
     self._project_commit_ids = commit_ids
-    return commit_ids
+    return CommitIdsResult(commit_ids, False)
 
-  def _WriteManfiestFile(self):
+  def _WriteManifestFile(self):
     """Writes manifest to a file.
 
     Returns:
       manifest_path: Path name of the file into which manifest is written instead of None.
     """
     if not os.path.exists(self._superproject_path):
-      print('error: missing superproject directory %s' %
-            self._superproject_path,
-            file=sys.stderr)
+      self._LogWarning(f'missing superproject directory: {self._superproject_path}')
       return None
     manifest_str = self._manifest.ToXml(groups=self._manifest.GetGroupsStr()).toxml()
     manifest_path = self._manifest_path
@@ -241,12 +289,30 @@
       with open(manifest_path, 'w', encoding='utf-8') as fp:
         fp.write(manifest_str)
     except IOError as e:
-      print('error: cannot write manifest to %s:\n%s'
-            % (manifest_path, e),
-            file=sys.stderr)
+      self._LogError(f'cannot write manifest to : {manifest_path} {e}')
       return None
     return manifest_path
 
+  def _SkipUpdatingProjectRevisionId(self, project):
+    """Checks if a project's revision id needs to be updated or not.
+
+    Revision id for projects from local manifest will not be updated.
+
+    Args:
+      project: project whose revision id is being updated.
+
+    Returns:
+      True if a project's revision id should not be updated, or False,
+    """
+    path = project.relpath
+    if not path:
+      return True
+    # Skip the project with revisionId.
+    if project.revisionId:
+      return True
+    # Skip the project if it comes from the local manifest.
+    return any(s.startswith(LOCAL_MANIFEST_GROUP_PREFIX) for s in project.groups)
+
   def UpdateProjectsRevisionId(self, projects):
     """Update revisionId of every project in projects with the commit id.
 
@@ -254,27 +320,96 @@
       projects: List of projects whose revisionId needs to be updated.
 
     Returns:
-      manifest_path: Path name of the overriding manfiest file instead of None.
+      UpdateProjectsResult
     """
-    commit_ids = self._GetAllProjectsCommitIds()
+    commit_ids_result = self._GetAllProjectsCommitIds()
+    commit_ids = commit_ids_result.commit_ids
     if not commit_ids:
-      print('error: Cannot get project commit ids from manifest', file=sys.stderr)
-      return None
+      return UpdateProjectsResult(None, commit_ids_result.fatal)
 
     projects_missing_commit_ids = []
     for project in projects:
-      path = project.relpath
-      if not path:
+      if self._SkipUpdatingProjectRevisionId(project):
         continue
+      path = project.relpath
       commit_id = commit_ids.get(path)
-      if commit_id:
-        project.SetRevisionId(commit_id)
-      else:
+      if not commit_id:
         projects_missing_commit_ids.append(path)
-    if projects_missing_commit_ids:
-      print('error: please file a bug using %s to report missing commit_ids for: %s' %
-            (BUG_REPORT_URL, projects_missing_commit_ids), file=sys.stderr)
-      return None
 
-    manifest_path = self._WriteManfiestFile()
-    return manifest_path
+    # If superproject doesn't have a commit id for a project, then report an
+    # error event and continue as if do not use superproject is specified.
+    if projects_missing_commit_ids:
+      self._LogWarning(f'please file a bug using {self._manifest.contactinfo.bugurl} '
+                       f'to report missing commit_ids for: {projects_missing_commit_ids}')
+      return UpdateProjectsResult(None, False)
+
+    for project in projects:
+      if not self._SkipUpdatingProjectRevisionId(project):
+        project.SetRevisionId(commit_ids.get(project.relpath))
+
+    manifest_path = self._WriteManifestFile()
+    return UpdateProjectsResult(manifest_path, False)
+
+
+@functools.lru_cache(maxsize=None)
+def _UseSuperprojectFromConfiguration():
+  """Returns the user choice of whether to use superproject."""
+  user_cfg = RepoConfig.ForUser()
+  time_now = int(time.time())
+
+  user_value = user_cfg.GetBoolean('repo.superprojectChoice')
+  if user_value is not None:
+    user_expiration = user_cfg.GetInt('repo.superprojectChoiceExpire')
+    if user_expiration is None or user_expiration <= 0 or user_expiration >= time_now:
+      # TODO(b/190688390) - Remove prompt when we are comfortable with the new
+      # default value.
+      if user_value:
+        print(('You are currently enrolled in Git submodules experiment '
+               '(go/android-submodules-quickstart).  Use --no-use-superproject '
+               'to override.\n'), file=sys.stderr)
+      else:
+        print(('You are not currently enrolled in Git submodules experiment '
+               '(go/android-submodules-quickstart).  Use --use-superproject '
+               'to override.\n'), file=sys.stderr)
+      return user_value
+
+  # We don't have an unexpired choice, ask for one.
+  system_cfg = RepoConfig.ForSystem()
+  system_value = system_cfg.GetBoolean('repo.superprojectChoice')
+  if system_value:
+    # The system configuration is proposing that we should enable the
+    # use of superproject. Treat the user as enrolled for two weeks.
+    #
+    # TODO(b/190688390) - Remove prompt when we are comfortable with the new
+    # default value.
+    userchoice = True
+    time_choiceexpire = time_now + (86400 * 14)
+    user_cfg.SetString('repo.superprojectChoiceExpire', str(time_choiceexpire))
+    user_cfg.SetBoolean('repo.superprojectChoice', userchoice)
+    print('You are automatically enrolled in Git submodules experiment '
+          '(go/android-submodules-quickstart) for another two weeks.\n',
+          file=sys.stderr)
+    return True
+
+  # For all other cases, we would not use superproject by default.
+  return False
+
+
+def PrintMessages(opt, manifest):
+  """Returns a boolean if error/warning messages are to be printed."""
+  return opt.use_superproject is not None or manifest.superproject
+
+
+def UseSuperproject(opt, manifest):
+  """Returns a boolean if use-superproject option is enabled."""
+
+  if opt.use_superproject is not None:
+    return opt.use_superproject
+  else:
+    client_value = manifest.manifestProject.config.GetBoolean('repo.superproject')
+    if client_value is not None:
+      return client_value
+    else:
+      if not manifest.superproject:
+        return False
+      return _UseSuperprojectFromConfiguration()
diff --git a/git_trace2_event_log.py b/git_trace2_event_log.py
index 8f12d1a..0e5e908 100644
--- a/git_trace2_event_log.py
+++ b/git_trace2_event_log.py
@@ -144,6 +144,19 @@
     command_event['subcommands'] = subcommands
     self._log.append(command_event)
 
+  def LogConfigEvents(self, config, event_dict_name):
+    """Append a |event_dict_name| event for each config key in |config|.
+
+    Args:
+      config: Configuration dictionary.
+      event_dict_name: Name of the event dictionary for items to be logged under.
+    """
+    for param, value in config.items():
+      event = self._CreateEventDict(event_dict_name)
+      event['param'] = param
+      event['value'] = value
+      self._log.append(event)
+
   def DefParamRepoEvents(self, config):
     """Append a 'def_param' event for each repo.* config key to the current log.
 
@@ -152,12 +165,34 @@
     """
     # Only output the repo.* config parameters.
     repo_config = {k: v for k, v in config.items() if k.startswith('repo.')}
+    self.LogConfigEvents(repo_config, 'def_param')
 
-    for param, value in repo_config.items():
-      def_param_event = self._CreateEventDict('def_param')
-      def_param_event['param'] = param
-      def_param_event['value'] = value
-      self._log.append(def_param_event)
+  def GetDataEventName(self, value):
+    """Returns 'data-json' if the value is an array else returns 'data'."""
+    return 'data-json' if value[0] == '[' and value[-1] == ']' else 'data'
+
+  def LogDataConfigEvents(self, config, prefix):
+    """Append a 'data' event for each config key/value in |config| to the current log.
+
+    For each keyX and valueX of the config, "key" field of the event is '|prefix|/keyX'
+    and the "value" of the "key" field is valueX.
+
+    Args:
+      config: Configuration dictionary.
+      prefix: Prefix for each key that is logged.
+    """
+    for key, value in config.items():
+      event = self._CreateEventDict(self.GetDataEventName(value))
+      event['key'] = f'{prefix}/{key}'
+      event['value'] = value
+      self._log.append(event)
+
+  def ErrorEvent(self, msg, fmt):
+    """Append a 'error' event to the current log."""
+    error_event = self._CreateEventDict('error')
+    error_event['msg'] = msg
+    error_event['fmt'] = fmt
+    self._log.append(error_event)
 
   def _GetEventTargetPath(self):
     """Get the 'trace2.eventtarget' path from git configuration.
diff --git a/main.py b/main.py
index 8aba2ec..2050cab 100755
--- a/main.py
+++ b/main.py
@@ -39,7 +39,7 @@
 import event_log
 from repo_trace import SetTrace
 from git_command import user_agent
-from git_config import init_ssh, close_ssh, RepoConfig
+from git_config import RepoConfig
 from git_trace2_event_log import EventLog
 from command import InteractiveCommand
 from command import MirrorSafeCommand
@@ -71,7 +71,7 @@
 #
 # python-3.6 is in Ubuntu Bionic.
 MIN_PYTHON_VERSION_SOFT = (3, 6)
-MIN_PYTHON_VERSION_HARD = (3, 5)
+MIN_PYTHON_VERSION_HARD = (3, 6)
 
 if sys.version_info.major < 3:
   print('repo: error: Python 2 is no longer supported; '
@@ -95,6 +95,8 @@
     add_help_option=False)
 global_options.add_option('-h', '--help', action='store_true',
                           help='show this help message and exit')
+global_options.add_option('--help-all', action='store_true',
+                          help='show this help message with all subcommands and exit')
 global_options.add_option('-p', '--paginate',
                           dest='pager', action='store_true',
                           help='display command output in the pager')
@@ -116,6 +118,10 @@
 global_options.add_option('--version',
                           dest='show_version', action='store_true',
                           help='display this version of repo')
+global_options.add_option('--show-toplevel',
+                          action='store_true',
+                          help='display the path of the top-level directory of '
+                               'the repo client checkout')
 global_options.add_option('--event-log',
                           dest='event_log', action='store',
                           help='filename of event log to append timeline to')
@@ -128,34 +134,40 @@
     self.repodir = repodir
     self.commands = all_commands
 
+  def _PrintHelp(self, short: bool = False, all_commands: bool = False):
+    """Show --help screen."""
+    global_options.print_help()
+    print()
+    if short:
+      commands = ' '.join(sorted(self.commands))
+      wrapped_commands = textwrap.wrap(commands, width=77)
+      print('Available commands:\n  %s' % ('\n  '.join(wrapped_commands),))
+      print('\nRun `repo help <command>` for command-specific details.')
+      print('Bug reports:', Wrapper().BUG_URL)
+    else:
+      cmd = self.commands['help']()
+      if all_commands:
+        cmd.PrintAllCommandsBody()
+      else:
+        cmd.PrintCommonCommandsBody()
+
   def _ParseArgs(self, argv):
     """Parse the main `repo` command line options."""
-    name = None
-    glob = []
-
-    for i in range(len(argv)):
-      if not argv[i].startswith('-'):
-        name = argv[i]
-        if i > 0:
-          glob = argv[:i]
+    for i, arg in enumerate(argv):
+      if not arg.startswith('-'):
+        name = arg
+        glob = argv[:i]
         argv = argv[i + 1:]
         break
-    if not name:
+    else:
+      name = None
       glob = argv
-      name = 'help'
       argv = []
     gopts, _gargs = global_options.parse_args(glob)
 
-    name, alias_args = self._ExpandAlias(name)
-    argv = alias_args + argv
-
-    if gopts.help:
-      global_options.print_help()
-      commands = ' '.join(sorted(self.commands))
-      wrapped_commands = textwrap.wrap(commands, width=77)
-      print('\nAvailable commands:\n  %s' % ('\n  '.join(wrapped_commands),))
-      print('\nRun `repo help <command>` for command-specific details.')
-      global_options.exit()
+    if name:
+      name, alias_args = self._ExpandAlias(name)
+      argv = alias_args + argv
 
     return (name, gopts, argv)
 
@@ -186,32 +198,44 @@
 
     if gopts.trace:
       SetTrace()
-    if gopts.show_version:
-      if name == 'help':
-        name = 'version'
-      else:
-        print('fatal: invalid usage of --version', file=sys.stderr)
-        return 1
+
+    # Handle options that terminate quickly first.
+    if gopts.help or gopts.help_all:
+      self._PrintHelp(short=False, all_commands=gopts.help_all)
+      return 0
+    elif gopts.show_version:
+      # Always allow global --version regardless of subcommand validity.
+      name = 'version'
+    elif gopts.show_toplevel:
+      print(os.path.dirname(self.repodir))
+      return 0
+    elif not name:
+      # No subcommand specified, so show the help/subcommand.
+      self._PrintHelp(short=True)
+      return 1
 
     SetDefaultColoring(gopts.color)
 
+    git_trace2_event_log = EventLog()
+    repo_client = RepoClient(self.repodir)
+    gitc_manifest = None
+    gitc_client_name = gitc_utils.parse_clientdir(os.getcwd())
+    if gitc_client_name:
+      gitc_manifest = GitcClient(self.repodir, gitc_client_name)
+      repo_client.isGitcClient = True
+
     try:
-      cmd = self.commands[name]()
+      cmd = self.commands[name](
+          repodir=self.repodir,
+          client=repo_client,
+          manifest=repo_client.manifest,
+          gitc_manifest=gitc_manifest,
+          git_event_log=git_trace2_event_log)
     except KeyError:
       print("repo: '%s' is not a repo command.  See 'repo help'." % name,
             file=sys.stderr)
       return 1
 
-    git_trace2_event_log = EventLog()
-    cmd.repodir = self.repodir
-    cmd.client = RepoClient(cmd.repodir)
-    cmd.manifest = cmd.client.manifest
-    cmd.gitc_manifest = None
-    gitc_client_name = gitc_utils.parse_clientdir(os.getcwd())
-    if gitc_client_name:
-      cmd.gitc_manifest = GitcClient(cmd.repodir, gitc_client_name)
-      cmd.client.isGitcClient = True
-
     Editor.globalConfig = cmd.client.globalConfig
 
     if not isinstance(cmd, MirrorSafeCommand) and cmd.manifest.IsMirror:
@@ -591,20 +615,16 @@
 
   repo = _Repo(opt.repodir)
   try:
-    try:
-      init_ssh()
-      init_http()
-      name, gopts, argv = repo._ParseArgs(argv)
-      run = lambda: repo._Run(name, gopts, argv) or 0
-      if gopts.trace_python:
-        import trace
-        tracer = trace.Trace(count=False, trace=True, timing=True,
-                             ignoredirs=set(sys.path[1:]))
-        result = tracer.runfunc(run)
-      else:
-        result = run()
-    finally:
-      close_ssh()
+    init_http()
+    name, gopts, argv = repo._ParseArgs(argv)
+    run = lambda: repo._Run(name, gopts, argv) or 0
+    if gopts.trace_python:
+      import trace
+      tracer = trace.Trace(count=False, trace=True, timing=True,
+                           ignoredirs=set(sys.path[1:]))
+      result = tracer.runfunc(run)
+    else:
+      result = run()
   except KeyboardInterrupt:
     print('aborted by user', file=sys.stderr)
     result = 1
diff --git a/man/repo-abandon.1 b/man/repo-abandon.1
new file mode 100644
index 0000000..b3c0422
--- /dev/null
+++ b/man/repo-abandon.1
@@ -0,0 +1,36 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo abandon" "Repo Manual"
+.SH NAME
+repo \- repo abandon - manual page for repo abandon
+.SH SYNOPSIS
+.B repo
+\fI\,abandon \/\fR[\fI\,--all | <branchname>\/\fR] [\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Permanently abandon a development branch
+.PP
+This subcommand permanently abandons a development branch by
+deleting it (and all its history) from your local repository.
+.PP
+It is equivalent to "git branch \fB\-D\fR <branchname>".
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-\-all\fR
+delete all branches in all projects
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help abandon` to view the detailed manual.
diff --git a/man/repo-branch.1 b/man/repo-branch.1
new file mode 100644
index 0000000..854ee98
--- /dev/null
+++ b/man/repo-branch.1
@@ -0,0 +1 @@
+.so man1/repo-branches.1
\ No newline at end of file
diff --git a/man/repo-branches.1 b/man/repo-branches.1
new file mode 100644
index 0000000..7fe0b02
--- /dev/null
+++ b/man/repo-branches.1
@@ -0,0 +1,59 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo branches" "Repo Manual"
+.SH NAME
+repo \- repo branches - manual page for repo branches
+.SH SYNOPSIS
+.B repo
+\fI\,branches \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+View current topic branches
+.PP
+Summarizes the currently available topic branches.
+.PP
+# Branch Display
+.PP
+The branch display output by this command is organized into four
+columns of information; for example:
+.TP
+*P nocolor
+| in repo
+.TP
+repo2
+|
+.PP
+The first column contains a * if the branch is the currently
+checked out branch in any of the specified projects, or a blank
+if no project has the branch checked out.
+.PP
+The second column contains either blank, p or P, depending upon
+the upload status of the branch.
+.IP
+(blank): branch not yet published by repo upload
+.IP
+P: all commits were published by repo upload
+p: only some commits were published by repo upload
+.PP
+The third column contains the branch name.
+.PP
+The fourth column (after the | separator) lists the projects that
+the branch appears in, or does not appear in.  If no project list
+is shown, then the branch appears in all projects.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help branches` to view the detailed manual.
diff --git a/man/repo-checkout.1 b/man/repo-checkout.1
new file mode 100644
index 0000000..6dd3e6c
--- /dev/null
+++ b/man/repo-checkout.1
@@ -0,0 +1,36 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo checkout" "Repo Manual"
+.SH NAME
+repo \- repo checkout - manual page for repo checkout
+.SH SYNOPSIS
+.B repo
+\fI\,checkout <branchname> \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Checkout a branch for development
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help checkout` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo checkout' command checks out an existing branch that was previously
+created by 'repo start'.
+.PP
+The command is equivalent to:
+.IP
+repo forall [<project>...] \fB\-c\fR git checkout <branchname>
diff --git a/man/repo-cherry-pick.1 b/man/repo-cherry-pick.1
new file mode 100644
index 0000000..e7716c5
--- /dev/null
+++ b/man/repo-cherry-pick.1
@@ -0,0 +1,28 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo cherry-pick" "Repo Manual"
+.SH NAME
+repo \- repo cherry-pick - manual page for repo cherry-pick
+.SH SYNOPSIS
+.B repo
+\fI\,cherry-pick <sha1>\/\fR
+.SH DESCRIPTION
+Summary
+.PP
+Cherry\-pick a change.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help cherry\-pick` to view the detailed manual.
+.SH DETAILS
+.PP
+\&'repo cherry\-pick' cherry\-picks a change from one branch to another. The change
+id will be updated, and a reference to the old change id will be added.
diff --git a/man/repo-diff.1 b/man/repo-diff.1
new file mode 100644
index 0000000..890f8d2
--- /dev/null
+++ b/man/repo-diff.1
@@ -0,0 +1,35 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo diff" "Repo Manual"
+.SH NAME
+repo \- repo diff - manual page for repo diff
+.SH SYNOPSIS
+.B repo
+\fI\,diff \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Show changes between commit and working tree
+.PP
+The \fB\-u\fR option causes 'repo diff' to generate diff output with file paths
+relative to the repository root, so the output can be applied
+to the Unix 'patch' command.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-u\fR, \fB\-\-absolute\fR
+paths are relative to the repository root
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help diff` to view the detailed manual.
diff --git a/man/repo-diffmanifests.1 b/man/repo-diffmanifests.1
new file mode 100644
index 0000000..add50f1
--- /dev/null
+++ b/man/repo-diffmanifests.1
@@ -0,0 +1,61 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo diffmanifests" "Repo Manual"
+.SH NAME
+repo \- repo diffmanifests - manual page for repo diffmanifests
+.SH SYNOPSIS
+.B repo
+\fI\,diffmanifests manifest1.xml \/\fR[\fI\,manifest2.xml\/\fR] [\fI\,options\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Manifest diff utility
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-\-raw\fR
+display raw diff
+.TP
+\fB\-\-no\-color\fR
+does not display the diff in color
+.TP
+\fB\-\-pretty\-format=\fR<FORMAT>
+print the log using a custom git pretty format string
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help diffmanifests` to view the detailed manual.
+.SH DETAILS
+.PP
+The repo diffmanifests command shows differences between project revisions of
+manifest1 and manifest2. if manifest2 is not specified, current manifest.xml
+will be used instead. Both absolute and relative paths may be used for
+manifests. Relative paths start from project's ".repo/manifests" folder.
+.PP
+The \fB\-\-raw\fR option Displays the diff in a way that facilitates parsing, the
+project pattern will be <status> <path> <revision from> [<revision to>] and the
+commit pattern will be <status> <onelined log> with status values respectively :
+.IP
+A = Added project
+R = Removed project
+C = Changed project
+U = Project with unreachable revision(s) (revision(s) not found)
+.PP
+for project, and
+.IP
+A = Added commit
+R = Removed commit
+.PP
+for a commit.
+.PP
+Only changed projects may contain commits, and commit status always starts with
+a space, and are part of last printed project. Unreachable revisions may occur
+if project is not up to date or if repo has not been initialized with all the
+groups, in which case some projects won't be synced and their revisions won't be
+found.
diff --git a/man/repo-download.1 b/man/repo-download.1
new file mode 100644
index 0000000..cf7f767
--- /dev/null
+++ b/man/repo-download.1
@@ -0,0 +1,44 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo download" "Repo Manual"
+.SH NAME
+repo \- repo download - manual page for repo download
+.SH SYNOPSIS
+.B repo
+\fI\,download {\/\fR[\fI\,project\/\fR] \fI\,change\/\fR[\fI\,/patchset\/\fR]\fI\,}\/\fR...
+.SH DESCRIPTION
+Summary
+.PP
+Download and checkout a change
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-b\fR BRANCH, \fB\-\-branch\fR=\fI\,BRANCH\/\fR
+create a new branch first
+.TP
+\fB\-c\fR, \fB\-\-cherry\-pick\fR
+cherry\-pick instead of checkout
+.TP
+\fB\-x\fR, \fB\-\-record\-origin\fR
+pass \fB\-x\fR when cherry\-picking
+.TP
+\fB\-r\fR, \fB\-\-revert\fR
+revert instead of checkout
+.TP
+\fB\-f\fR, \fB\-\-ff\-only\fR
+force fast\-forward merge
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help download` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo download' command downloads a change from the review system and makes
+it available in your project's local working directory. If no project is
+specified try to use current directory as a project.
diff --git a/man/repo-forall.1 b/man/repo-forall.1
new file mode 100644
index 0000000..eb2ad57
--- /dev/null
+++ b/man/repo-forall.1
@@ -0,0 +1,128 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo forall" "Repo Manual"
+.SH NAME
+repo \- repo forall - manual page for repo forall
+.SH SYNOPSIS
+.B repo
+\fI\,forall \/\fR[\fI\,<project>\/\fR...] \fI\,-c <command> \/\fR[\fI\,<arg>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Run a shell command in each project
+.PP
+repo forall \fB\-r\fR str1 [str2] ... \fB\-c\fR <command> [<arg>...]
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-r\fR, \fB\-\-regex\fR
+execute the command only on projects matching regex or
+wildcard expression
+.TP
+\fB\-i\fR, \fB\-\-inverse\-regex\fR
+execute the command only on projects not matching
+regex or wildcard expression
+.TP
+\fB\-g\fR GROUPS, \fB\-\-groups\fR=\fI\,GROUPS\/\fR
+execute the command only on projects matching the
+specified groups
+.TP
+\fB\-c\fR, \fB\-\-command\fR
+command (and arguments) to execute
+.TP
+\fB\-e\fR, \fB\-\-abort\-on\-errors\fR
+abort if a command exits unsuccessfully
+.TP
+\fB\-\-ignore\-missing\fR
+silently skip & do not exit non\-zero due missing
+checkouts
+.TP
+\fB\-\-interactive\fR
+force interactive usage
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.TP
+\fB\-p\fR
+show project headers before output
+.PP
+Run `repo help forall` to view the detailed manual.
+.SH DETAILS
+.PP
+Executes the same shell command in each project.
+.PP
+The \fB\-r\fR option allows running the command only on projects matching regex or
+wildcard expression.
+.PP
+By default, projects are processed non\-interactively in parallel. If you want to
+run interactive commands, make sure to pass \fB\-\-interactive\fR to force \fB\-\-jobs\fR 1.
+While the processing order of projects is not guaranteed, the order of project
+output is stable.
+.PP
+Output Formatting
+.PP
+The \fB\-p\fR option causes 'repo forall' to bind pipes to the command's stdin, stdout
+and stderr streams, and pipe all output into a continuous stream that is
+displayed in a single pager session. Project headings are inserted before the
+output of each command is displayed. If the command produces no output in a
+project, no heading is displayed.
+.PP
+The formatting convention used by \fB\-p\fR is very suitable for some types of
+searching, e.g. `repo forall \fB\-p\fR \fB\-c\fR git log \fB\-SFoo\fR` will print all commits that
+add or remove references to Foo.
+.PP
+The \fB\-v\fR option causes 'repo forall' to display stderr messages if a command
+produces output only on stderr. Normally the \fB\-p\fR option causes command output to
+be suppressed until the command produces at least one byte of output on stdout.
+.PP
+Environment
+.PP
+pwd is the project's working directory. If the current client is a mirror
+client, then pwd is the Git repository.
+.PP
+REPO_PROJECT is set to the unique name of the project.
+.PP
+REPO_PATH is the path relative the the root of the client.
+.PP
+REPO_REMOTE is the name of the remote system from the manifest.
+.PP
+REPO_LREV is the name of the revision from the manifest, translated to a local
+tracking branch. If you need to pass the manifest revision to a locally executed
+git command, use REPO_LREV.
+.PP
+REPO_RREV is the name of the revision from the manifest, exactly as written in
+the manifest.
+.PP
+REPO_COUNT is the total number of projects being iterated.
+.PP
+REPO_I is the current (1\-based) iteration count. Can be used in conjunction with
+REPO_COUNT to add a simple progress indicator to your command.
+.PP
+REPO__* are any extra environment variables, specified by the "annotation"
+element under any project element. This can be useful for differentiating trees
+based on user\-specific criteria, or simply annotating tree details.
+.PP
+shell positional arguments ($1, $2, .., $#) are set to any arguments following
+<command>.
+.PP
+Example: to list projects:
+.IP
+repo forall \fB\-c\fR 'echo $REPO_PROJECT'
+.PP
+Notice that $REPO_PROJECT is quoted to ensure it is expanded in the context of
+running <command> instead of in the calling shell.
+.PP
+Unless \fB\-p\fR is used, stdin, stdout, stderr are inherited from the terminal and are
+not redirected.
+.PP
+If \fB\-e\fR is used, when a command exits unsuccessfully, 'repo forall' will abort
+without iterating through the remaining projects.
diff --git a/man/repo-gitc-delete.1 b/man/repo-gitc-delete.1
new file mode 100644
index 0000000..c84c6e4
--- /dev/null
+++ b/man/repo-gitc-delete.1
@@ -0,0 +1,31 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo gitc-delete" "Repo Manual"
+.SH NAME
+repo \- repo gitc-delete - manual page for repo gitc-delete
+.SH SYNOPSIS
+.B repo
+\fI\,gitc-delete\/\fR
+.SH DESCRIPTION
+Summary
+.PP
+Delete a GITC Client.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-f\fR, \fB\-\-force\fR
+force the deletion (no prompt)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help gitc\-delete` to view the detailed manual.
+.SH DETAILS
+.PP
+This subcommand deletes the current GITC client, deleting the GITC manifest and
+all locally downloaded sources.
diff --git a/man/repo-gitc-init.1 b/man/repo-gitc-init.1
new file mode 100644
index 0000000..9b61866
--- /dev/null
+++ b/man/repo-gitc-init.1
@@ -0,0 +1,150 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "September 2021" "repo gitc-init" "Repo Manual"
+.SH NAME
+repo \- repo gitc-init - manual page for repo gitc-init
+.SH SYNOPSIS
+.B repo
+\fI\,gitc-init \/\fR[\fI\,options\/\fR] [\fI\,client name\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Initialize a GITC Client.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS Manifest options:
+.TP
+\fB\-u\fR URL, \fB\-\-manifest\-url\fR=\fI\,URL\/\fR
+manifest repository location
+.TP
+\fB\-b\fR REVISION, \fB\-\-manifest\-branch\fR=\fI\,REVISION\/\fR
+manifest branch or revision (use HEAD for default)
+.TP
+\fB\-m\fR NAME.xml, \fB\-\-manifest\-name\fR=\fI\,NAME\/\fR.xml
+initial manifest file
+.TP
+\fB\-\-standalone\-manifest\fR
+download the manifest as a static file rather then
+create a git checkout of the manifest repo
+.TP
+\fB\-g\fR GROUP, \fB\-\-groups\fR=\fI\,GROUP\/\fR
+restrict manifest projects to ones with specified
+group(s) [default|all|G1,G2,G3|G4,\-G5,\-G6]
+.TP
+\fB\-p\fR PLATFORM, \fB\-\-platform\fR=\fI\,PLATFORM\/\fR
+restrict manifest projects to ones with a specified
+platform group [auto|all|none|linux|darwin|...]
+.TP
+\fB\-\-submodules\fR
+sync any submodules associated with the manifest repo
+.SS Manifest (only) checkout options:
+.TP
+\fB\-\-current\-branch\fR
+fetch only current manifest branch from server
+.TP
+\fB\-\-no\-current\-branch\fR
+fetch all manifest branches from server
+.TP
+\fB\-\-tags\fR
+fetch tags in the manifest
+.TP
+\fB\-\-no\-tags\fR
+don't fetch tags in the manifest
+.SS Checkout modes:
+.TP
+\fB\-\-mirror\fR
+create a replica of the remote repositories rather
+than a client working directory
+.TP
+\fB\-\-archive\fR
+checkout an archive instead of a git repository for
+each project. See git archive.
+.TP
+\fB\-\-worktree\fR
+use git\-worktree to manage projects
+.SS Project checkout optimizations:
+.TP
+\fB\-\-reference\fR=\fI\,DIR\/\fR
+location of mirror directory
+.TP
+\fB\-\-dissociate\fR
+dissociate from reference mirrors after clone
+.TP
+\fB\-\-depth\fR=\fI\,DEPTH\/\fR
+create a shallow clone with given depth; see git clone
+.TP
+\fB\-\-partial\-clone\fR
+perform partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-no\-partial\-clone\fR
+disable use of partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-partial\-clone\-exclude\fR=\fI\,PARTIAL_CLONE_EXCLUDE\/\fR
+exclude the specified projects (a comma\-delimited
+project names) from partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-clone\-filter\fR=\fI\,CLONE_FILTER\/\fR
+filter for use with \fB\-\-partial\-clone\fR [default:
+blob:none]
+.TP
+\fB\-\-use\-superproject\fR
+use the manifest superproject to sync projects
+.TP
+\fB\-\-no\-use\-superproject\fR
+disable use of manifest superprojects
+.TP
+\fB\-\-clone\-bundle\fR
+enable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS (default if
+not \fB\-\-partial\-clone\fR)
+.TP
+\fB\-\-no\-clone\-bundle\fR
+disable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS (default if
+\fB\-\-partial\-clone\fR)
+.SS repo Version options:
+.TP
+\fB\-\-repo\-url\fR=\fI\,URL\/\fR
+repo repository location ($REPO_URL)
+.TP
+\fB\-\-repo\-rev\fR=\fI\,REV\/\fR
+repo branch or revision ($REPO_REV)
+.TP
+\fB\-\-no\-repo\-verify\fR
+do not verify repo source code
+.SS Other options:
+.TP
+\fB\-\-config\-name\fR
+Always prompt for name/e\-mail
+.SS GITC options:
+.TP
+\fB\-f\fR MANIFEST_FILE, \fB\-\-manifest\-file\fR=\fI\,MANIFEST_FILE\/\fR
+Optional manifest file to use for this GITC client.
+.TP
+\fB\-c\fR GITC_CLIENT, \fB\-\-gitc\-client\fR=\fI\,GITC_CLIENT\/\fR
+Name of the gitc_client instance to create or modify.
+.PP
+Run `repo help gitc\-init` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo gitc\-init' command is ran to initialize a new GITC client for use with
+the GITC file system.
+.PP
+This command will setup the client directory, initialize repo, just like repo
+init does, and then downloads the manifest collection and installs it in the
+\&.repo/directory of the GITC client.
+.PP
+Once this is done, a GITC manifest is generated by pulling the HEAD SHA for each
+project and generates the properly formatted XML file and installs it as
+\&.manifest in the GITC client directory.
+.PP
+The \fB\-c\fR argument is required to specify the GITC client name.
+.PP
+The optional \fB\-f\fR argument can be used to specify the manifest file to use for
+this GITC client.
diff --git a/man/repo-grep.1 b/man/repo-grep.1
new file mode 100644
index 0000000..be41058
--- /dev/null
+++ b/man/repo-grep.1
@@ -0,0 +1,119 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo grep" "Repo Manual"
+.SH NAME
+repo \- repo grep - manual page for repo grep
+.SH SYNOPSIS
+.B repo
+\fI\,grep {pattern | -e pattern} \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Print lines matching a pattern
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.SS Logging options:
+.TP
+\fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS Sources:
+.TP
+\fB\-\-cached\fR
+Search the index, instead of the work tree
+.TP
+\fB\-r\fR TREEish, \fB\-\-revision\fR=\fI\,TREEish\/\fR
+Search TREEish, instead of the work tree
+.SS Pattern:
+.TP
+\fB\-e\fR PATTERN
+Pattern to search for
+.TP
+\fB\-i\fR, \fB\-\-ignore\-case\fR
+Ignore case differences
+.TP
+\fB\-a\fR, \fB\-\-text\fR
+Process binary files as if they were text
+.TP
+\fB\-I\fR
+Don't match the pattern in binary files
+.TP
+\fB\-w\fR, \fB\-\-word\-regexp\fR
+Match the pattern only at word boundaries
+.TP
+\fB\-v\fR, \fB\-\-invert\-match\fR
+Select non\-matching lines
+.TP
+\fB\-G\fR, \fB\-\-basic\-regexp\fR
+Use POSIX basic regexp for patterns (default)
+.TP
+\fB\-E\fR, \fB\-\-extended\-regexp\fR
+Use POSIX extended regexp for patterns
+.TP
+\fB\-F\fR, \fB\-\-fixed\-strings\fR
+Use fixed strings (not regexp) for pattern
+.SS Pattern Grouping:
+.TP
+\fB\-\-all\-match\fR
+Limit match to lines that have all patterns
+.TP
+\fB\-\-and\fR, \fB\-\-or\fR, \fB\-\-not\fR
+Boolean operators to combine patterns
+.TP
+\-(, \-)
+Boolean operator grouping
+.SS Output:
+.TP
+\fB\-n\fR
+Prefix the line number to matching lines
+.TP
+\fB\-C\fR CONTEXT
+Show CONTEXT lines around match
+.TP
+\fB\-B\fR CONTEXT
+Show CONTEXT lines before match
+.TP
+\fB\-A\fR CONTEXT
+Show CONTEXT lines after match
+.TP
+\fB\-l\fR, \fB\-\-name\-only\fR, \fB\-\-files\-with\-matches\fR
+Show only file names containing matching lines
+.TP
+\fB\-L\fR, \fB\-\-files\-without\-match\fR
+Show only file names not containing matching lines
+.PP
+Run `repo help grep` to view the detailed manual.
+.SH DETAILS
+.PP
+Search for the specified patterns in all project files.
+.PP
+Boolean Options
+.PP
+The following options can appear as often as necessary to express the pattern to
+locate:
+.HP
+\fB\-e\fR PATTERN
+.HP
+\fB\-\-and\fR, \fB\-\-or\fR, \fB\-\-not\fR, \-(, \-)
+.PP
+Further, the \fB\-r\fR/\-\-revision option may be specified multiple times in order to
+scan multiple trees. If the same file matches in more than one tree, only the
+first result is reported, prefixed by the revision name it was found under.
+.PP
+Examples
+.PP
+Look for a line that has '#define' and either 'MAX_PATH or 'PATH_MAX':
+.IP
+repo grep \fB\-e\fR '#define' \fB\-\-and\fR \-\e( \fB\-e\fR MAX_PATH \fB\-e\fR PATH_MAX \e)
+.PP
+Look for a line that has 'NODE' or 'Unexpected' in files that contain a line
+that matches both expressions:
+.IP
+repo grep \fB\-\-all\-match\fR \fB\-e\fR NODE \fB\-e\fR Unexpected
diff --git a/man/repo-help.1 b/man/repo-help.1
new file mode 100644
index 0000000..d6da3c5
--- /dev/null
+++ b/man/repo-help.1
@@ -0,0 +1,33 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo help" "Repo Manual"
+.SH NAME
+repo \- repo help - manual page for repo help
+.SH SYNOPSIS
+.B repo
+\fI\,help \/\fR[\fI\,--all|command\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Display detailed help on a command
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-a\fR, \fB\-\-all\fR
+show the complete list of commands
+.TP
+\fB\-\-help\-all\fR
+show the \fB\-\-help\fR of all commands
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help help` to view the detailed manual.
+.SH DETAILS
+.PP
+Displays detailed usage information about a command.
diff --git a/man/repo-info.1 b/man/repo-info.1
new file mode 100644
index 0000000..cf7c17b
--- /dev/null
+++ b/man/repo-info.1
@@ -0,0 +1,40 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo info" "Repo Manual"
+.SH NAME
+repo \- repo info - manual page for repo info
+.SH SYNOPSIS
+.B repo
+\fI\,info \/\fR[\fI\,-dl\/\fR] [\fI\,-o \/\fR[\fI\,-c\/\fR]] [\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Get info on the manifest branch, current branch or unmerged branches
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-d\fR, \fB\-\-diff\fR
+show full info and commit diff including remote
+branches
+.TP
+\fB\-o\fR, \fB\-\-overview\fR
+show overview of all local commits
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+consider only checked out branches
+.TP
+\fB\-\-no\-current\-branch\fR
+consider all local branches
+.TP
+\fB\-l\fR, \fB\-\-local\-only\fR
+disable all remote operations
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help info` to view the detailed manual.
diff --git a/man/repo-init.1 b/man/repo-init.1
new file mode 100644
index 0000000..9957b64
--- /dev/null
+++ b/man/repo-init.1
@@ -0,0 +1,170 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "September 2021" "repo init" "Repo Manual"
+.SH NAME
+repo \- repo init - manual page for repo init
+.SH SYNOPSIS
+.B repo
+\fI\,init \/\fR[\fI\,options\/\fR] [\fI\,manifest url\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Initialize a repo client checkout in the current directory
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS Manifest options:
+.TP
+\fB\-u\fR URL, \fB\-\-manifest\-url\fR=\fI\,URL\/\fR
+manifest repository location
+.TP
+\fB\-b\fR REVISION, \fB\-\-manifest\-branch\fR=\fI\,REVISION\/\fR
+manifest branch or revision (use HEAD for default)
+.TP
+\fB\-m\fR NAME.xml, \fB\-\-manifest\-name\fR=\fI\,NAME\/\fR.xml
+initial manifest file
+.TP
+\fB\-\-standalone\-manifest\fR
+download the manifest as a static file rather then
+create a git checkout of the manifest repo
+.TP
+\fB\-g\fR GROUP, \fB\-\-groups\fR=\fI\,GROUP\/\fR
+restrict manifest projects to ones with specified
+group(s) [default|all|G1,G2,G3|G4,\-G5,\-G6]
+.TP
+\fB\-p\fR PLATFORM, \fB\-\-platform\fR=\fI\,PLATFORM\/\fR
+restrict manifest projects to ones with a specified
+platform group [auto|all|none|linux|darwin|...]
+.TP
+\fB\-\-submodules\fR
+sync any submodules associated with the manifest repo
+.SS Manifest (only) checkout options:
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+fetch only current manifest branch from server
+.TP
+\fB\-\-no\-current\-branch\fR
+fetch all manifest branches from server
+.TP
+\fB\-\-tags\fR
+fetch tags in the manifest
+.TP
+\fB\-\-no\-tags\fR
+don't fetch tags in the manifest
+.SS Checkout modes:
+.TP
+\fB\-\-mirror\fR
+create a replica of the remote repositories rather
+than a client working directory
+.TP
+\fB\-\-archive\fR
+checkout an archive instead of a git repository for
+each project. See git archive.
+.TP
+\fB\-\-worktree\fR
+use git\-worktree to manage projects
+.SS Project checkout optimizations:
+.TP
+\fB\-\-reference\fR=\fI\,DIR\/\fR
+location of mirror directory
+.TP
+\fB\-\-dissociate\fR
+dissociate from reference mirrors after clone
+.TP
+\fB\-\-depth\fR=\fI\,DEPTH\/\fR
+create a shallow clone with given depth; see git clone
+.TP
+\fB\-\-partial\-clone\fR
+perform partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-no\-partial\-clone\fR
+disable use of partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-partial\-clone\-exclude\fR=\fI\,PARTIAL_CLONE_EXCLUDE\/\fR
+exclude the specified projects (a comma\-delimited
+project names) from partial clone (https://gitscm.com/docs/gitrepositorylayout#_code_partialclone_code)
+.TP
+\fB\-\-clone\-filter\fR=\fI\,CLONE_FILTER\/\fR
+filter for use with \fB\-\-partial\-clone\fR [default:
+blob:none]
+.TP
+\fB\-\-use\-superproject\fR
+use the manifest superproject to sync projects
+.TP
+\fB\-\-no\-use\-superproject\fR
+disable use of manifest superprojects
+.TP
+\fB\-\-clone\-bundle\fR
+enable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS (default if
+not \fB\-\-partial\-clone\fR)
+.TP
+\fB\-\-no\-clone\-bundle\fR
+disable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS (default if
+\fB\-\-partial\-clone\fR)
+.SS repo Version options:
+.TP
+\fB\-\-repo\-url\fR=\fI\,URL\/\fR
+repo repository location ($REPO_URL)
+.TP
+\fB\-\-repo\-rev\fR=\fI\,REV\/\fR
+repo branch or revision ($REPO_REV)
+.TP
+\fB\-\-no\-repo\-verify\fR
+do not verify repo source code
+.SS Other options:
+.TP
+\fB\-\-config\-name\fR
+Always prompt for name/e\-mail
+.PP
+Run `repo help init` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo init' command is run once to install and initialize repo. The latest
+repo source code and manifest collection is downloaded from the server and is
+installed in the .repo/ directory in the current working directory.
+.PP
+When creating a new checkout, the manifest URL is the only required setting. It
+may be specified using the \fB\-\-manifest\-url\fR option, or as the first optional
+argument.
+.PP
+The optional \fB\-b\fR argument can be used to select the manifest branch to checkout
+and use. If no branch is specified, the remote's default branch is used. This is
+equivalent to using \fB\-b\fR HEAD.
+.PP
+The optional \fB\-m\fR argument can be used to specify an alternate manifest to be
+used. If no manifest is specified, the manifest default.xml will be used.
+.PP
+If the \fB\-\-standalone\-manifest\fR argument is set, the manifest will be downloaded
+directly from the specified \fB\-\-manifest\-url\fR as a static file (rather than setting
+up a manifest git checkout). With \fB\-\-standalone\-manifest\fR, the manifest will be
+fully static and will not be re\-downloaded during subsesquent `repo init` and
+`repo sync` calls.
+.PP
+The \fB\-\-reference\fR option can be used to point to a directory that has the content
+of a \fB\-\-mirror\fR sync. This will make the working directory use as much data as
+possible from the local reference directory when fetching from the server. This
+will make the sync go a lot faster by reducing data traffic on the network.
+.PP
+The \fB\-\-dissociate\fR option can be used to borrow the objects from the directory
+specified with the \fB\-\-reference\fR option only to reduce network transfer, and stop
+borrowing from them after a first clone is made by making necessary local copies
+of borrowed objects.
+.PP
+The \fB\-\-no\-clone\-bundle\fR option disables any attempt to use \fI\,$URL/clone.bundle\/\fP to
+bootstrap a new Git repository from a resumeable bundle file on a content
+delivery network. This may be necessary if there are problems with the local
+Python HTTP client or proxy configuration, but the Git binary works.
+.PP
+Switching Manifest Branches
+.PP
+To switch to another manifest branch, `repo init \fB\-b\fR otherbranch` may be used in
+an existing client. However, as this only updates the manifest, a subsequent
+`repo sync` (or `repo sync \fB\-d\fR`) is necessary to update the working directory
+files.
diff --git a/man/repo-list.1 b/man/repo-list.1
new file mode 100644
index 0000000..7f85e61
--- /dev/null
+++ b/man/repo-list.1
@@ -0,0 +1,61 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo list" "Repo Manual"
+.SH NAME
+repo \- repo list - manual page for repo list
+.SH SYNOPSIS
+.B repo
+\fI\,list \/\fR[\fI\,-f\/\fR] [\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+List projects and their associated directories
+.PP
+repo list [\-f] \fB\-r\fR str1 [str2]...
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-r\fR, \fB\-\-regex\fR
+filter the project list based on regex or wildcard
+matching of strings
+.TP
+\fB\-g\fR GROUPS, \fB\-\-groups\fR=\fI\,GROUPS\/\fR
+filter the project list based on the groups the
+project is in
+.TP
+\fB\-a\fR, \fB\-\-all\fR
+show projects regardless of checkout state
+.TP
+\fB\-n\fR, \fB\-\-name\-only\fR
+display only the name of the repository
+.TP
+\fB\-p\fR, \fB\-\-path\-only\fR
+display only the path of the repository
+.TP
+\fB\-f\fR, \fB\-\-fullpath\fR
+display the full work tree path instead of the
+relative path
+.TP
+\fB\-\-relative\-to\fR=\fI\,PATH\/\fR
+display paths relative to this one (default: top of
+repo client checkout)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help list` to view the detailed manual.
+.SH DETAILS
+.PP
+List all projects; pass '.' to list the project for the cwd.
+.PP
+By default, only projects that currently exist in the checkout are shown. If you
+want to list all projects (using the specified filter settings), use the \fB\-\-all\fR
+option. If you want to show all projects regardless of the manifest groups, then
+also pass \fB\-\-groups\fR all.
+.PP
+This is similar to running: repo forall \fB\-c\fR 'echo "$REPO_PATH : $REPO_PROJECT"'.
diff --git a/man/repo-manifest.1 b/man/repo-manifest.1
new file mode 100644
index 0000000..be46760
--- /dev/null
+++ b/man/repo-manifest.1
@@ -0,0 +1,548 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo manifest" "Repo Manual"
+.SH NAME
+repo \- repo manifest - manual page for repo manifest
+.SH SYNOPSIS
+.B repo
+\fI\,manifest \/\fR[\fI\,-o {-|NAME.xml}\/\fR] [\fI\,-m MANIFEST.xml\/\fR] [\fI\,-r\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Manifest inspection utility
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-r\fR, \fB\-\-revision\-as\-HEAD\fR
+save revisions as current HEAD
+.TP
+\fB\-m\fR NAME.xml, \fB\-\-manifest\-name\fR=\fI\,NAME\/\fR.xml
+temporary manifest to use for this sync
+.TP
+\fB\-\-suppress\-upstream\-revision\fR
+if in \fB\-r\fR mode, do not write the upstream field (only
+of use if the branch names for a sha1 manifest are
+sensitive)
+.TP
+\fB\-\-suppress\-dest\-branch\fR
+if in \fB\-r\fR mode, do not write the dest\-branch field
+(only of use if the branch names for a sha1 manifest
+are sensitive)
+.TP
+\fB\-\-json\fR
+output manifest in JSON format (experimental)
+.TP
+\fB\-\-pretty\fR
+format output for humans to read
+.TP
+\fB\-\-no\-local\-manifests\fR
+ignore local manifests
+.TP
+\fB\-o\fR \-|NAME.xml, \fB\-\-output\-file\fR=\fI\,\-\/\fR|NAME.xml
+file to save the manifest to
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help manifest` to view the detailed manual.
+.SH DETAILS
+.PP
+With the \fB\-o\fR option, exports the current manifest for inspection. The manifest
+and (if present) local_manifests/ are combined together to produce a single
+manifest file. This file can be stored in a Git repository for use during future
+\&'repo init' invocations.
+.PP
+The \fB\-r\fR option can be used to generate a manifest file with project revisions set
+to the current commit hash. These are known as "revision locked manifests", as
+they don't follow a particular branch. In this case, the 'upstream' attribute is
+set to the ref we were on when the manifest was generated. The 'dest\-branch'
+attribute is set to indicate the remote ref to push changes to via 'repo
+upload'.
+.PP
+repo Manifest Format
+.PP
+A repo manifest describes the structure of a repo client; that is the
+directories that are visible and where they should be obtained from with git.
+.PP
+The basic structure of a manifest is a bare Git repository holding a single
+`default.xml` XML file in the top level directory.
+.PP
+Manifests are inherently version controlled, since they are kept within a Git
+repository. Updates to manifests are automatically obtained by clients during
+`repo sync`.
+.PP
+[TOC]
+.PP
+XML File Format
+.PP
+A manifest XML file (e.g. `default.xml`) roughly conforms to the following DTD:
+.PP
+```xml <!DOCTYPE manifest [
+.TP
+<!ELEMENT manifest (notice?,
+remote*,
+default?,
+manifest\-server?,
+remove\-project*,
+project*,
+extend\-project*,
+repo\-hooks?,
+superproject?,
+contactinfo?,
+include*)>
+.IP
+<!ELEMENT notice (#PCDATA)>
+.IP
+<!ELEMENT remote (annotation*)>
+<!ATTLIST remote name         ID    #REQUIRED>
+<!ATTLIST remote alias        CDATA #IMPLIED>
+<!ATTLIST remote fetch        CDATA #REQUIRED>
+<!ATTLIST remote pushurl      CDATA #IMPLIED>
+<!ATTLIST remote review       CDATA #IMPLIED>
+<!ATTLIST remote revision     CDATA #IMPLIED>
+.IP
+<!ELEMENT default EMPTY>
+<!ATTLIST default remote      IDREF #IMPLIED>
+<!ATTLIST default revision    CDATA #IMPLIED>
+<!ATTLIST default dest\-branch CDATA #IMPLIED>
+<!ATTLIST default upstream    CDATA #IMPLIED>
+<!ATTLIST default sync\-j      CDATA #IMPLIED>
+<!ATTLIST default sync\-c      CDATA #IMPLIED>
+<!ATTLIST default sync\-s      CDATA #IMPLIED>
+<!ATTLIST default sync\-tags   CDATA #IMPLIED>
+.IP
+<!ELEMENT manifest\-server EMPTY>
+<!ATTLIST manifest\-server url CDATA #REQUIRED>
+.TP
+<!ELEMENT project (annotation*,
+project*,
+copyfile*,
+linkfile*)>
+.TP
+<!ATTLIST project name
+CDATA #REQUIRED>
+.TP
+<!ATTLIST project path
+CDATA #IMPLIED>
+.TP
+<!ATTLIST project remote
+IDREF #IMPLIED>
+.TP
+<!ATTLIST project revision
+CDATA #IMPLIED>
+.IP
+<!ATTLIST project dest\-branch CDATA #IMPLIED>
+<!ATTLIST project groups      CDATA #IMPLIED>
+<!ATTLIST project sync\-c      CDATA #IMPLIED>
+<!ATTLIST project sync\-s      CDATA #IMPLIED>
+<!ATTLIST project sync\-tags   CDATA #IMPLIED>
+<!ATTLIST project upstream CDATA #IMPLIED>
+<!ATTLIST project clone\-depth CDATA #IMPLIED>
+<!ATTLIST project force\-path CDATA #IMPLIED>
+.IP
+<!ELEMENT annotation EMPTY>
+<!ATTLIST annotation name  CDATA #REQUIRED>
+<!ATTLIST annotation value CDATA #REQUIRED>
+<!ATTLIST annotation keep  CDATA "true">
+.IP
+<!ELEMENT copyfile EMPTY>
+<!ATTLIST copyfile src  CDATA #REQUIRED>
+<!ATTLIST copyfile dest CDATA #REQUIRED>
+.IP
+<!ELEMENT linkfile EMPTY>
+<!ATTLIST linkfile src CDATA #REQUIRED>
+<!ATTLIST linkfile dest CDATA #REQUIRED>
+.IP
+<!ELEMENT extend\-project EMPTY>
+<!ATTLIST extend\-project name CDATA #REQUIRED>
+<!ATTLIST extend\-project path CDATA #IMPLIED>
+<!ATTLIST extend\-project groups CDATA #IMPLIED>
+<!ATTLIST extend\-project revision CDATA #IMPLIED>
+<!ATTLIST extend\-project remote CDATA #IMPLIED>
+.IP
+<!ELEMENT remove\-project EMPTY>
+<!ATTLIST remove\-project name  CDATA #REQUIRED>
+<!ATTLIST remove\-project optional  CDATA #IMPLIED>
+.IP
+<!ELEMENT repo\-hooks EMPTY>
+<!ATTLIST repo\-hooks in\-project CDATA #REQUIRED>
+<!ATTLIST repo\-hooks enabled\-list CDATA #REQUIRED>
+.IP
+<!ELEMENT superproject EMPTY>
+<!ATTLIST superproject name    CDATA #REQUIRED>
+<!ATTLIST superproject remote  IDREF #IMPLIED>
+.IP
+<!ELEMENT contactinfo EMPTY>
+<!ATTLIST contactinfo bugurl  CDATA #REQUIRED>
+.IP
+<!ELEMENT include EMPTY>
+<!ATTLIST include name   CDATA #REQUIRED>
+<!ATTLIST include groups CDATA #IMPLIED>
+.PP
+]>
+```
+.PP
+For compatibility purposes across repo releases, all unknown elements are
+silently ignored. However, repo reserves all possible names for itself for
+future use. If you want to use custom elements, the `x\-*` namespace is reserved
+for that purpose, and repo guarantees to never allocate any corresponding names.
+.PP
+A description of the elements and their attributes follows.
+.PP
+Element manifest
+.PP
+The root element of the file.
+.PP
+Element notice
+.PP
+Arbitrary text that is displayed to users whenever `repo sync` finishes. The
+content is simply passed through as it exists in the manifest.
+.PP
+Element remote
+.PP
+One or more remote elements may be specified. Each remote element specifies a
+Git URL shared by one or more projects and (optionally) the Gerrit review server
+those projects upload changes through.
+.PP
+Attribute `name`: A short name unique to this manifest file. The name specified
+here is used as the remote name in each project's .git/config, and is therefore
+automatically available to commands like `git fetch`, `git remote`, `git pull`
+and `git push`.
+.PP
+Attribute `alias`: The alias, if specified, is used to override `name` to be set
+as the remote name in each project's .git/config. Its value can be duplicated
+while attribute `name` has to be unique in the manifest file. This helps each
+project to be able to have same remote name which actually points to different
+remote url.
+.PP
+Attribute `fetch`: The Git URL prefix for all projects which use this remote.
+Each project's name is appended to this prefix to form the actual URL used to
+clone the project.
+.PP
+Attribute `pushurl`: The Git "push" URL prefix for all projects which use this
+remote. Each project's name is appended to this prefix to form the actual URL
+used to "git push" the project. This attribute is optional; if not specified
+then "git push" will use the same URL as the `fetch` attribute.
+.PP
+Attribute `review`: Hostname of the Gerrit server where reviews are uploaded to
+by `repo upload`. This attribute is optional; if not specified then `repo
+upload` will not function.
+.PP
+Attribute `revision`: Name of a Git branch (e.g. `main` or `refs/heads/main`).
+Remotes with their own revision will override the default revision.
+.PP
+Element default
+.PP
+At most one default element may be specified. Its remote and revision attributes
+are used when a project element does not specify its own remote or revision
+attribute.
+.PP
+Attribute `remote`: Name of a previously defined remote element. Project
+elements lacking a remote attribute of their own will use this remote.
+.PP
+Attribute `revision`: Name of a Git branch (e.g. `main` or `refs/heads/main`).
+Project elements lacking their own revision attribute will use this revision.
+.PP
+Attribute `dest\-branch`: Name of a Git branch (e.g. `main`). Project elements
+not setting their own `dest\-branch` will inherit this value. If this value is
+not set, projects will use `revision` by default instead.
+.PP
+Attribute `upstream`: Name of the Git ref in which a sha1 can be found. Used
+when syncing a revision locked manifest in \fB\-c\fR mode to avoid having to sync the
+entire ref space. Project elements not setting their own `upstream` will inherit
+this value.
+.PP
+Attribute `sync\-j`: Number of parallel jobs to use when synching.
+.PP
+Attribute `sync\-c`: Set to true to only sync the given Git branch (specified in
+the `revision` attribute) rather than the whole ref space. Project elements
+lacking a sync\-c element of their own will use this value.
+.PP
+Attribute `sync\-s`: Set to true to also sync sub\-projects.
+.PP
+Attribute `sync\-tags`: Set to false to only sync the given Git branch (specified
+in the `revision` attribute) rather than the other ref tags.
+.PP
+Element manifest\-server
+.PP
+At most one manifest\-server may be specified. The url attribute is used to
+specify the URL of a manifest server, which is an XML RPC service.
+.PP
+The manifest server should implement the following RPC methods:
+.IP
+GetApprovedManifest(branch, target)
+.PP
+Return a manifest in which each project is pegged to a known good revision for
+the current branch and target. This is used by repo sync when the \fB\-\-smart\-sync\fR
+option is given.
+.PP
+The target to use is defined by environment variables TARGET_PRODUCT and
+TARGET_BUILD_VARIANT. These variables are used to create a string of the form
+$TARGET_PRODUCT\-$TARGET_BUILD_VARIANT, e.g. passion\-userdebug. If one of those
+variables or both are not present, the program will call GetApprovedManifest
+without the target parameter and the manifest server should choose a reasonable
+default target.
+.IP
+GetManifest(tag)
+.PP
+Return a manifest in which each project is pegged to the revision at the
+specified tag. This is used by repo sync when the \fB\-\-smart\-tag\fR option is given.
+.PP
+Element project
+.PP
+One or more project elements may be specified. Each element describes a single
+Git repository to be cloned into the repo client workspace. You may specify
+Git\-submodules by creating a nested project. Git\-submodules will be
+automatically recognized and inherit their parent's attributes, but those may be
+overridden by an explicitly specified project element.
+.PP
+Attribute `name`: A unique name for this project. The project's name is appended
+onto its remote's fetch URL to generate the actual URL to configure the Git
+remote with. The URL gets formed as:
+.IP
+${remote_fetch}/${project_name}.git
+.PP
+where ${remote_fetch} is the remote's fetch attribute and ${project_name} is the
+project's name attribute. The suffix ".git" is always appended as repo assumes
+the upstream is a forest of bare Git repositories. If the project has a parent
+element, its name will be prefixed by the parent's.
+.PP
+The project name must match the name Gerrit knows, if Gerrit is being used for
+code reviews.
+.PP
+"name" must not be empty, and may not be an absolute path or use "." or ".."
+path components. It is always interpreted relative to the remote's fetch
+settings, so if a different base path is needed, declare a different remote with
+the new settings needed. These restrictions are not enforced for [Local
+Manifests].
+.PP
+Attribute `path`: An optional path relative to the top directory of the repo
+client where the Git working directory for this project should be placed. If not
+supplied the project "name" is used. If the project has a parent element, its
+path will be prefixed by the parent's.
+.PP
+"path" may not be an absolute path or use "." or ".." path components. These
+restrictions are not enforced for [Local Manifests].
+.PP
+If you want to place files into the root of the checkout (e.g. a README or
+Makefile or another build script), use the [copyfile] or [linkfile] elements
+instead.
+.PP
+Attribute `remote`: Name of a previously defined remote element. If not supplied
+the remote given by the default element is used.
+.PP
+Attribute `revision`: Name of the Git branch the manifest wants to track for
+this project. Names can be relative to refs/heads (e.g. just "main") or absolute
+(e.g. "refs/heads/main"). Tags and/or explicit SHA\-1s should work in theory, but
+have not been extensively tested. If not supplied the revision given by the
+remote element is used if applicable, else the default element is used.
+.PP
+Attribute `dest\-branch`: Name of a Git branch (e.g. `main`). When using `repo
+upload`, changes will be submitted for code review on this branch. If
+unspecified both here and in the default element, `revision` is used instead.
+.PP
+Attribute `groups`: List of groups to which this project belongs, whitespace or
+comma separated. All projects belong to the group "all", and each project
+automatically belongs to a group of its name:`name` and path:`path`. E.g. for
+`<project name="monkeys" path="barrel\-of"/>`, that project definition is
+implicitly in the following manifest groups: default, name:monkeys, and
+path:barrel\-of. If you place a project in the group "notdefault", it will not be
+automatically downloaded by repo. If the project has a parent element, the
+`name` and `path` here are the prefixed ones.
+.PP
+Attribute `sync\-c`: Set to true to only sync the given Git branch (specified in
+the `revision` attribute) rather than the whole ref space.
+.PP
+Attribute `sync\-s`: Set to true to also sync sub\-projects.
+.PP
+Attribute `upstream`: Name of the Git ref in which a sha1 can be found. Used
+when syncing a revision locked manifest in \fB\-c\fR mode to avoid having to sync the
+entire ref space.
+.PP
+Attribute `clone\-depth`: Set the depth to use when fetching this project. If
+specified, this value will override any value given to repo init with the
+\fB\-\-depth\fR option on the command line.
+.PP
+Attribute `force\-path`: Set to true to force this project to create the local
+mirror repository according to its `path` attribute (if supplied) rather than
+the `name` attribute. This attribute only applies to the local mirrors syncing,
+it will be ignored when syncing the projects in a client working directory.
+.PP
+Element extend\-project
+.PP
+Modify the attributes of the named project.
+.PP
+This element is mostly useful in a local manifest file, to modify the attributes
+of an existing project without completely replacing the existing project
+definition. This makes the local manifest more robust against changes to the
+original manifest.
+.PP
+Attribute `path`: If specified, limit the change to projects checked out at the
+specified path, rather than all projects with the given name.
+.PP
+Attribute `groups`: List of additional groups to which this project belongs.
+Same syntax as the corresponding element of `project`.
+.PP
+Attribute `revision`: If specified, overrides the revision of the original
+project. Same syntax as the corresponding element of `project`.
+.PP
+Attribute `remote`: If specified, overrides the remote of the original project.
+Same syntax as the corresponding element of `project`.
+.PP
+Element annotation
+.PP
+Zero or more annotation elements may be specified as children of a project or
+remote element. Each element describes a name\-value pair. For projects, this
+name\-value pair will be exported into each project's environment during a
+\&'forall' command, prefixed with `REPO__`. In addition, there is an optional
+attribute "keep" which accepts the case insensitive values "true" (default) or
+"false". This attribute determines whether or not the annotation will be kept
+when exported with the manifest subcommand.
+.PP
+Element copyfile
+.PP
+Zero or more copyfile elements may be specified as children of a project
+element. Each element describes a src\-dest pair of files; the "src" file will be
+copied to the "dest" place during `repo sync` command.
+.PP
+"src" is project relative, "dest" is relative to the top of the tree. Copying
+from paths outside of the project or to paths outside of the repo client is not
+allowed.
+.PP
+"src" and "dest" must be files. Directories or symlinks are not allowed.
+Intermediate paths must not be symlinks either.
+.PP
+Parent directories of "dest" will be automatically created if missing.
+.PP
+Element linkfile
+.PP
+It's just like copyfile and runs at the same time as copyfile but instead of
+copying it creates a symlink.
+.PP
+The symlink is created at "dest" (relative to the top of the tree) and points to
+the path specified by "src" which is a path in the project.
+.PP
+Parent directories of "dest" will be automatically created if missing.
+.PP
+The symlink target may be a file or directory, but it may not point outside of
+the repo client.
+.PP
+Element remove\-project
+.PP
+Deletes the named project from the internal manifest table, possibly allowing a
+subsequent project element in the same manifest file to replace the project with
+a different source.
+.PP
+This element is mostly useful in a local manifest file, where the user can
+remove a project, and possibly replace it with their own definition.
+.PP
+Attribute `optional`: Set to true to ignore remove\-project elements with no
+matching `project` element.
+.PP
+Element repo\-hooks
+.PP
+NB: See the [practical documentation](./repo\-hooks.md) for using repo hooks.
+.PP
+Only one repo\-hooks element may be specified at a time. Attempting to redefine
+it will fail to parse.
+.PP
+Attribute `in\-project`: The project where the hooks are defined. The value must
+match the `name` attribute (**not** the `path` attribute) of a previously
+defined `project` element.
+.PP
+Attribute `enabled\-list`: List of hooks to use, whitespace or comma separated.
+.PP
+Element superproject
+.PP
+*** *Note*: This is currently a WIP. ***
+.PP
+NB: See the [git superprojects documentation](
+https://en.wikibooks.org/wiki/Git/Submodules_and_Superprojects) for background
+information.
+.PP
+This element is used to specify the URL of the superproject. It has "name" and
+"remote" as atrributes. Only "name" is required while the others have reasonable
+defaults. At most one superproject may be specified. Attempting to redefine it
+will fail to parse.
+.PP
+Attribute `name`: A unique name for the superproject. This attribute has the
+same meaning as project's name attribute. See the [element
+project](#element\-project) for more information.
+.PP
+Attribute `remote`: Name of a previously defined remote element. If not supplied
+the remote given by the default element is used.
+.PP
+Element contactinfo
+.PP
+*** *Note*: This is currently a WIP. ***
+.PP
+This element is used to let manifest authors self\-register contact info. It has
+"bugurl" as a required atrribute. This element can be repeated, and any later
+entries will clobber earlier ones. This would allow manifest authors who extend
+manifests to specify their own contact info.
+.PP
+Attribute `bugurl`: The URL to file a bug against the manifest owner.
+.PP
+Element include
+.PP
+This element provides the capability of including another manifest file into the
+originating manifest. Normal rules apply for the target manifest to include \- it
+must be a usable manifest on its own.
+.PP
+Attribute `name`: the manifest to include, specified relative to the manifest
+repository's root.
+.PP
+"name" may not be an absolute path or use "." or ".." path components. These
+restrictions are not enforced for [Local Manifests].
+.PP
+Attribute `groups`: List of additional groups to which all projects in the
+included manifest belong. This appends and recurses, meaning all projects in
+sub\-manifests carry all parent include groups. Same syntax as the corresponding
+element of `project`.
+.PP
+Local Manifests
+.PP
+Additional remotes and projects may be added through local manifest files stored
+in `$TOP_DIR/.repo/local_manifests/*.xml`.
+.PP
+For example:
+.IP
+\f(CW$ ls .repo/local_manifests\fR
+.IP
+local_manifest.xml
+another_local_manifest.xml
+.IP
+\f(CW$ cat .repo/local_manifests/local_manifest.xml\fR
+.IP
+<?xml version="1.0" encoding="UTF\-8"?>
+<manifest>
+.IP
+<project path="manifest"
+.IP
+name="tools/manifest" />
+.IP
+<project path="platform\-manifest"
+.IP
+name="platform/manifest" />
+.IP
+</manifest>
+.PP
+Users may add projects to the local manifest(s) prior to a `repo sync`
+invocation, instructing repo to automatically download and manage these extra
+projects.
+.PP
+Manifest files stored in `$TOP_DIR/.repo/local_manifests/*.xml` will be loaded
+in alphabetical order.
+.PP
+Projects from local manifest files are added into local::<local manifest
+filename> group.
+.PP
+The legacy `$TOP_DIR/.repo/local_manifest.xml` path is no longer supported.
+.SS [copyfile]: #Element\-copyfile [linkfile]: #Element\-linkfile [Local Manifests]:
+.PP
+#local\-manifests
diff --git a/man/repo-overview.1 b/man/repo-overview.1
new file mode 100644
index 0000000..a12c764
--- /dev/null
+++ b/man/repo-overview.1
@@ -0,0 +1,39 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo overview" "Repo Manual"
+.SH NAME
+repo \- repo overview - manual page for repo overview
+.SH SYNOPSIS
+.B repo
+\fI\,overview \/\fR[\fI\,--current-branch\/\fR] [\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Display overview of unmerged project branches
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+consider only checked out branches
+.TP
+\fB\-\-no\-current\-branch\fR
+consider all local branches
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help overview` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo overview' command is used to display an overview of the projects
+branches, and list any local commits that have not yet been merged into the
+project.
+.PP
+The \fB\-c\fR/\-\-current\-branch option can be used to restrict the output to only
+branches currently checked out in each project. By default, all branches are
+displayed.
diff --git a/man/repo-prune.1 b/man/repo-prune.1
new file mode 100644
index 0000000..bd68a37
--- /dev/null
+++ b/man/repo-prune.1
@@ -0,0 +1,28 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo prune" "Repo Manual"
+.SH NAME
+repo \- repo prune - manual page for repo prune
+.SH SYNOPSIS
+.B repo
+\fI\,prune \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Prune (delete) already merged topics
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help prune` to view the detailed manual.
diff --git a/man/repo-rebase.1 b/man/repo-rebase.1
new file mode 100644
index 0000000..aa26103
--- /dev/null
+++ b/man/repo-rebase.1
@@ -0,0 +1,55 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo rebase" "Repo Manual"
+.SH NAME
+repo \- repo rebase - manual page for repo rebase
+.SH SYNOPSIS
+.B repo
+\fI\,rebase {\/\fR[\fI\,<project>\/\fR...] \fI\,| -i <project>\/\fR...\fI\,}\/\fR
+.SH DESCRIPTION
+Summary
+.PP
+Rebase local branches on upstream branch
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-\-fail\-fast\fR
+stop rebasing after first error is hit
+.TP
+\fB\-f\fR, \fB\-\-force\-rebase\fR
+pass \fB\-\-force\-rebase\fR to git rebase
+.TP
+\fB\-\-no\-ff\fR
+pass \fB\-\-no\-ff\fR to git rebase
+.TP
+\fB\-\-autosquash\fR
+pass \fB\-\-autosquash\fR to git rebase
+.TP
+\fB\-\-whitespace\fR=\fI\,WS\/\fR
+pass \fB\-\-whitespace\fR to git rebase
+.TP
+\fB\-\-auto\-stash\fR
+stash local modifications before starting
+.TP
+\fB\-m\fR, \fB\-\-onto\-manifest\fR
+rebase onto the manifest version instead of upstream
+HEAD (this helps to make sure the local tree stays
+consistent if you previously synced to a manifest)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.TP
+\fB\-i\fR, \fB\-\-interactive\fR
+interactive rebase (single project only)
+.PP
+Run `repo help rebase` to view the detailed manual.
+.SH DETAILS
+.PP
+\&'repo rebase' uses git rebase to move local changes in the current topic branch
+to the HEAD of the upstream history, useful when you have made commits in a
+topic branch but need to incorporate new upstream changes "underneath" them.
diff --git a/man/repo-selfupdate.1 b/man/repo-selfupdate.1
new file mode 100644
index 0000000..70c855a
--- /dev/null
+++ b/man/repo-selfupdate.1
@@ -0,0 +1,35 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo selfupdate" "Repo Manual"
+.SH NAME
+repo \- repo selfupdate - manual page for repo selfupdate
+.SH SYNOPSIS
+.B repo
+\fI\,selfupdate\/\fR
+.SH DESCRIPTION
+Summary
+.PP
+Update repo to the latest version
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS repo Version options:
+.TP
+\fB\-\-no\-repo\-verify\fR
+do not verify repo source code
+.PP
+Run `repo help selfupdate` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo selfupdate' command upgrades repo to the latest version, if a newer
+version is available.
+.PP
+Normally this is done automatically by 'repo sync' and does not need to be
+performed by an end\-user.
diff --git a/man/repo-smartsync.1 b/man/repo-smartsync.1
new file mode 100644
index 0000000..5d93911
--- /dev/null
+++ b/man/repo-smartsync.1
@@ -0,0 +1,118 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo smartsync" "Repo Manual"
+.SH NAME
+repo \- repo smartsync - manual page for repo smartsync
+.SH SYNOPSIS
+.B repo
+\fI\,smartsync \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Update working tree to the latest known good revision
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-\-jobs\-network\fR=\fI\,JOBS\/\fR
+number of network jobs to run in parallel (defaults to
+\fB\-\-jobs\fR)
+.TP
+\fB\-\-jobs\-checkout\fR=\fI\,JOBS\/\fR
+number of local checkout jobs to run in parallel
+(defaults to \fB\-\-jobs\fR)
+.TP
+\fB\-f\fR, \fB\-\-force\-broken\fR
+obsolete option (to be deleted in the future)
+.TP
+\fB\-\-fail\-fast\fR
+stop syncing after first error is hit
+.TP
+\fB\-\-force\-sync\fR
+overwrite an existing git directory if it needs to
+point to a different object directory. WARNING: this
+may cause loss of data
+.TP
+\fB\-\-force\-remove\-dirty\fR
+force remove projects with uncommitted modifications
+if projects no longer exist in the manifest. WARNING:
+this may cause loss of data
+.TP
+\fB\-l\fR, \fB\-\-local\-only\fR
+only update working tree, don't fetch
+.TP
+\fB\-\-no\-manifest\-update\fR, \fB\-\-nmu\fR
+use the existing manifest checkout as\-is. (do not
+update to the latest revision)
+.TP
+\fB\-n\fR, \fB\-\-network\-only\fR
+fetch only, don't update working tree
+.TP
+\fB\-d\fR, \fB\-\-detach\fR
+detach projects back to manifest revision
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+fetch only current branch from server
+.TP
+\fB\-\-no\-current\-branch\fR
+fetch all branches from server
+.TP
+\fB\-m\fR NAME.xml, \fB\-\-manifest\-name\fR=\fI\,NAME\/\fR.xml
+temporary manifest to use for this sync
+.TP
+\fB\-\-clone\-bundle\fR
+enable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS
+.TP
+\fB\-\-no\-clone\-bundle\fR
+disable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS
+.TP
+\fB\-u\fR MANIFEST_SERVER_USERNAME, \fB\-\-manifest\-server\-username\fR=\fI\,MANIFEST_SERVER_USERNAME\/\fR
+username to authenticate with the manifest server
+.TP
+\fB\-p\fR MANIFEST_SERVER_PASSWORD, \fB\-\-manifest\-server\-password\fR=\fI\,MANIFEST_SERVER_PASSWORD\/\fR
+password to authenticate with the manifest server
+.TP
+\fB\-\-fetch\-submodules\fR
+fetch submodules from server
+.TP
+\fB\-\-use\-superproject\fR
+use the manifest superproject to sync projects
+.TP
+\fB\-\-no\-use\-superproject\fR
+disable use of manifest superprojects
+.TP
+\fB\-\-tags\fR
+fetch tags
+.TP
+\fB\-\-no\-tags\fR
+don't fetch tags
+.TP
+\fB\-\-optimized\-fetch\fR
+only fetch projects fixed to sha1 if revision does not
+exist locally
+.TP
+\fB\-\-retry\-fetches\fR=\fI\,RETRY_FETCHES\/\fR
+number of times to retry fetches on transient errors
+.TP
+\fB\-\-prune\fR
+delete refs that no longer exist on the remote
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS repo Version options:
+.TP
+\fB\-\-no\-repo\-verify\fR
+do not verify repo source code
+.PP
+Run `repo help smartsync` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo smartsync' command is a shortcut for sync \fB\-s\fR.
diff --git a/man/repo-stage.1 b/man/repo-stage.1
new file mode 100644
index 0000000..07e1cac
--- /dev/null
+++ b/man/repo-stage.1
@@ -0,0 +1,30 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo stage" "Repo Manual"
+.SH NAME
+repo \- repo stage - manual page for repo stage
+.SH SYNOPSIS
+.B repo
+\fI\,stage -i \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Stage file(s) for commit
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.TP
+\fB\-i\fR, \fB\-\-interactive\fR
+use interactive staging
+.PP
+Run `repo help stage` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo stage' command stages files to prepare the next commit.
diff --git a/man/repo-start.1 b/man/repo-start.1
new file mode 100644
index 0000000..b00a31f
--- /dev/null
+++ b/man/repo-start.1
@@ -0,0 +1,41 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo start" "Repo Manual"
+.SH NAME
+repo \- repo start - manual page for repo start
+.SH SYNOPSIS
+.B repo
+\fI\,start <newbranchname> \/\fR[\fI\,--all | <project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Start a new branch for development
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-\-all\fR
+begin branch in all projects
+.TP
+\fB\-r\fR REVISION, \fB\-\-rev\fR=\fI\,REVISION\/\fR, \fB\-\-revision\fR=\fI\,REVISION\/\fR
+point branch at this revision instead of upstream
+.TP
+\fB\-\-head\fR, \fB\-\-HEAD\fR
+abbreviation for \fB\-\-rev\fR HEAD
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help start` to view the detailed manual.
+.SH DETAILS
+.PP
+\&'repo start' begins a new branch of development, starting from the revision
+specified in the manifest.
diff --git a/man/repo-status.1 b/man/repo-status.1
new file mode 100644
index 0000000..fbae2c5
--- /dev/null
+++ b/man/repo-status.1
@@ -0,0 +1,98 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo status" "Repo Manual"
+.SH NAME
+repo \- repo status - manual page for repo status
+.SH SYNOPSIS
+.B repo
+\fI\,status \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Show the working tree status
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-o\fR, \fB\-\-orphans\fR
+include objects in working directory outside of repo
+projects
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help status` to view the detailed manual.
+.SH DETAILS
+.PP
+\&'repo status' compares the working tree to the staging area (aka index), and the
+most recent commit on this branch (HEAD), in each project specified. A summary
+is displayed, one line per file where there is a difference between these three
+states.
+.PP
+The \fB\-j\fR/\-\-jobs option can be used to run multiple status queries in parallel.
+.PP
+The \fB\-o\fR/\-\-orphans option can be used to show objects that are in the working
+directory, but not associated with a repo project. This includes unmanaged
+top\-level files and directories, but also includes deeper items. For example, if
+dir/subdir/proj1 and dir/subdir/proj2 are repo projects, dir/subdir/proj3 will
+be shown if it is not known to repo.
+.PP
+Status Display
+.PP
+The status display is organized into three columns of information, for example
+if the file 'subcmds/status.py' is modified in the project 'repo' on branch
+\&'devwork':
+.TP
+project repo/
+branch devwork
+.TP
+\fB\-m\fR
+subcmds/status.py
+.PP
+The first column explains how the staging area (index) differs from the last
+commit (HEAD). Its values are always displayed in upper case and have the
+following meanings:
+.TP
+\-:
+no difference
+.TP
+A:
+added         (not in HEAD,     in index                     )
+.TP
+M:
+modified      (    in HEAD,     in index, different content  )
+.TP
+D:
+deleted       (    in HEAD, not in index                     )
+.TP
+R:
+renamed       (not in HEAD,     in index, path changed       )
+.TP
+C:
+copied        (not in HEAD,     in index, copied from another)
+.TP
+T:
+mode changed  (    in HEAD,     in index, same content       )
+.TP
+U:
+unmerged; conflict resolution required
+.PP
+The second column explains how the working directory differs from the index. Its
+values are always displayed in lower case and have the following meanings:
+.TP
+\-:
+new / unknown (not in index,     in work tree                )
+.TP
+m:
+modified      (    in index,     in work tree, modified      )
+.TP
+d:
+deleted       (    in index, not in work tree                )
diff --git a/man/repo-sync.1 b/man/repo-sync.1
new file mode 100644
index 0000000..c87c970
--- /dev/null
+++ b/man/repo-sync.1
@@ -0,0 +1,209 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo sync" "Repo Manual"
+.SH NAME
+repo \- repo sync - manual page for repo sync
+.SH SYNOPSIS
+.B repo
+\fI\,sync \/\fR[\fI\,<project>\/\fR...]
+.SH DESCRIPTION
+Summary
+.PP
+Update working tree to the latest revision
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-\-jobs\-network\fR=\fI\,JOBS\/\fR
+number of network jobs to run in parallel (defaults to
+\fB\-\-jobs\fR)
+.TP
+\fB\-\-jobs\-checkout\fR=\fI\,JOBS\/\fR
+number of local checkout jobs to run in parallel
+(defaults to \fB\-\-jobs\fR)
+.TP
+\fB\-f\fR, \fB\-\-force\-broken\fR
+obsolete option (to be deleted in the future)
+.TP
+\fB\-\-fail\-fast\fR
+stop syncing after first error is hit
+.TP
+\fB\-\-force\-sync\fR
+overwrite an existing git directory if it needs to
+point to a different object directory. WARNING: this
+may cause loss of data
+.TP
+\fB\-\-force\-remove\-dirty\fR
+force remove projects with uncommitted modifications
+if projects no longer exist in the manifest. WARNING:
+this may cause loss of data
+.TP
+\fB\-l\fR, \fB\-\-local\-only\fR
+only update working tree, don't fetch
+.TP
+\fB\-\-no\-manifest\-update\fR, \fB\-\-nmu\fR
+use the existing manifest checkout as\-is. (do not
+update to the latest revision)
+.TP
+\fB\-n\fR, \fB\-\-network\-only\fR
+fetch only, don't update working tree
+.TP
+\fB\-d\fR, \fB\-\-detach\fR
+detach projects back to manifest revision
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+fetch only current branch from server
+.TP
+\fB\-\-no\-current\-branch\fR
+fetch all branches from server
+.TP
+\fB\-m\fR NAME.xml, \fB\-\-manifest\-name\fR=\fI\,NAME\/\fR.xml
+temporary manifest to use for this sync
+.TP
+\fB\-\-clone\-bundle\fR
+enable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS
+.TP
+\fB\-\-no\-clone\-bundle\fR
+disable use of \fI\,/clone.bundle\/\fP on HTTP/HTTPS
+.TP
+\fB\-u\fR MANIFEST_SERVER_USERNAME, \fB\-\-manifest\-server\-username\fR=\fI\,MANIFEST_SERVER_USERNAME\/\fR
+username to authenticate with the manifest server
+.TP
+\fB\-p\fR MANIFEST_SERVER_PASSWORD, \fB\-\-manifest\-server\-password\fR=\fI\,MANIFEST_SERVER_PASSWORD\/\fR
+password to authenticate with the manifest server
+.TP
+\fB\-\-fetch\-submodules\fR
+fetch submodules from server
+.TP
+\fB\-\-use\-superproject\fR
+use the manifest superproject to sync projects
+.TP
+\fB\-\-no\-use\-superproject\fR
+disable use of manifest superprojects
+.TP
+\fB\-\-tags\fR
+fetch tags
+.TP
+\fB\-\-no\-tags\fR
+don't fetch tags
+.TP
+\fB\-\-optimized\-fetch\fR
+only fetch projects fixed to sha1 if revision does not
+exist locally
+.TP
+\fB\-\-retry\-fetches\fR=\fI\,RETRY_FETCHES\/\fR
+number of times to retry fetches on transient errors
+.TP
+\fB\-\-prune\fR
+delete refs that no longer exist on the remote
+.TP
+\fB\-s\fR, \fB\-\-smart\-sync\fR
+smart sync using manifest from the latest known good
+build
+.TP
+\fB\-t\fR SMART_TAG, \fB\-\-smart\-tag\fR=\fI\,SMART_TAG\/\fR
+smart sync using manifest from a known tag
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS repo Version options:
+.TP
+\fB\-\-no\-repo\-verify\fR
+do not verify repo source code
+.PP
+Run `repo help sync` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo sync' command synchronizes local project directories with the remote
+repositories specified in the manifest. If a local project does not yet exist,
+it will clone a new local directory from the remote repository and set up
+tracking branches as specified in the manifest. If the local project already
+exists, 'repo sync' will update the remote branches and rebase any new local
+changes on top of the new remote changes.
+.PP
+\&'repo sync' will synchronize all projects listed at the command line. Projects
+can be specified either by name, or by a relative or absolute path to the
+project's local directory. If no projects are specified, 'repo sync' will
+synchronize all projects listed in the manifest.
+.PP
+The \fB\-d\fR/\-\-detach option can be used to switch specified projects back to the
+manifest revision. This option is especially helpful if the project is currently
+on a topic branch, but the manifest revision is temporarily needed.
+.PP
+The \fB\-s\fR/\-\-smart\-sync option can be used to sync to a known good build as
+specified by the manifest\-server element in the current manifest. The
+\fB\-t\fR/\-\-smart\-tag option is similar and allows you to specify a custom tag/label.
+.PP
+The \fB\-u\fR/\-\-manifest\-server\-username and \fB\-p\fR/\-\-manifest\-server\-password options can
+be used to specify a username and password to authenticate with the manifest
+server when using the \fB\-s\fR or \fB\-t\fR option.
+.PP
+If \fB\-u\fR and \fB\-p\fR are not specified when using the \fB\-s\fR or \fB\-t\fR option, 'repo sync' will
+attempt to read authentication credentials for the manifest server from the
+user's .netrc file.
+.PP
+\&'repo sync' will not use authentication credentials from \fB\-u\fR/\-p or .netrc if the
+manifest server specified in the manifest file already includes credentials.
+.PP
+By default, all projects will be synced. The \fB\-\-fail\-fast\fR option can be used to
+halt syncing as soon as possible when the first project fails to sync.
+.PP
+The \fB\-\-force\-sync\fR option can be used to overwrite existing git directories if
+they have previously been linked to a different object directory. WARNING: This
+may cause data to be lost since refs may be removed when overwriting.
+.PP
+The \fB\-\-force\-remove\-dirty\fR option can be used to remove previously used projects
+with uncommitted changes. WARNING: This may cause data to be lost since
+uncommitted changes may be removed with projects that no longer exist in the
+manifest.
+.PP
+The \fB\-\-no\-clone\-bundle\fR option disables any attempt to use \fI\,$URL/clone.bundle\/\fP to
+bootstrap a new Git repository from a resumeable bundle file on a content
+delivery network. This may be necessary if there are problems with the local
+Python HTTP client or proxy configuration, but the Git binary works.
+.PP
+The \fB\-\-fetch\-submodules\fR option enables fetching Git submodules of a project from
+server.
+.PP
+The \fB\-c\fR/\-\-current\-branch option can be used to only fetch objects that are on the
+branch specified by a project's revision.
+.PP
+The \fB\-\-optimized\-fetch\fR option can be used to only fetch projects that are fixed
+to a sha1 revision if the sha1 revision does not already exist locally.
+.PP
+The \fB\-\-prune\fR option can be used to remove any refs that no longer exist on the
+remote.
+.PP
+SSH Connections
+.PP
+If at least one project remote URL uses an SSH connection (ssh://, git+ssh://,
+or user@host:path syntax) repo will automatically enable the SSH ControlMaster
+option when connecting to that host. This feature permits other projects in the
+same 'repo sync' session to reuse the same SSH tunnel, saving connection setup
+overheads.
+.PP
+To disable this behavior on UNIX platforms, set the GIT_SSH environment variable
+to 'ssh'. For example:
+.IP
+export GIT_SSH=ssh
+repo sync
+.PP
+Compatibility
+.PP
+This feature is automatically disabled on Windows, due to the lack of UNIX
+domain socket support.
+.PP
+This feature is not compatible with url.insteadof rewrites in the user's
+~/.gitconfig. 'repo sync' is currently not able to perform the rewrite early
+enough to establish the ControlMaster tunnel.
+.PP
+If the remote SSH daemon is Gerrit Code Review, version 2.0.10 or later is
+required to fix a server side protocol bug.
diff --git a/man/repo-upload.1 b/man/repo-upload.1
new file mode 100644
index 0000000..36a0dac
--- /dev/null
+++ b/man/repo-upload.1
@@ -0,0 +1,175 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo upload" "Repo Manual"
+.SH NAME
+repo \- repo upload - manual page for repo upload
+.SH SYNOPSIS
+.B repo
+\fI\,upload \/\fR[\fI\,--re --cc\/\fR] [\fI\,<project>\/\fR]...
+.SH DESCRIPTION
+Summary
+.PP
+Upload changes for code review
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-j\fR JOBS, \fB\-\-jobs\fR=\fI\,JOBS\/\fR
+number of jobs to run in parallel (default: based on
+number of CPU cores)
+.TP
+\fB\-t\fR
+send local branch name to Gerrit Code Review
+.TP
+\fB\-\-hashtag\fR=\fI\,HASHTAGS\/\fR, \fB\-\-ht\fR=\fI\,HASHTAGS\/\fR
+add hashtags (comma delimited) to the review
+.TP
+\fB\-\-hashtag\-branch\fR, \fB\-\-htb\fR
+add local branch name as a hashtag
+.TP
+\fB\-l\fR LABELS, \fB\-\-label\fR=\fI\,LABELS\/\fR
+add a label when uploading
+.TP
+\fB\-\-re\fR=\fI\,REVIEWERS\/\fR, \fB\-\-reviewers\fR=\fI\,REVIEWERS\/\fR
+request reviews from these people
+.TP
+\fB\-\-cc\fR=\fI\,CC\/\fR
+also send email to these email addresses
+.TP
+\fB\-\-br\fR=\fI\,BRANCH\/\fR, \fB\-\-branch\fR=\fI\,BRANCH\/\fR
+(local) branch to upload
+.TP
+\fB\-c\fR, \fB\-\-current\-branch\fR
+upload current git branch
+.TP
+\fB\-\-no\-current\-branch\fR
+upload all git branches
+.TP
+\fB\-\-ne\fR, \fB\-\-no\-emails\fR
+do not send e\-mails on upload
+.TP
+\fB\-p\fR, \fB\-\-private\fR
+upload as a private change (deprecated; use \fB\-\-wip\fR)
+.TP
+\fB\-w\fR, \fB\-\-wip\fR
+upload as a work\-in\-progress change
+.TP
+\fB\-o\fR PUSH_OPTIONS, \fB\-\-push\-option\fR=\fI\,PUSH_OPTIONS\/\fR
+additional push options to transmit
+.TP
+\fB\-D\fR BRANCH, \fB\-\-destination\fR=\fI\,BRANCH\/\fR, \fB\-\-dest\fR=\fI\,BRANCH\/\fR
+submit for review on this target branch
+.TP
+\fB\-n\fR, \fB\-\-dry\-run\fR
+do everything except actually upload the CL
+.TP
+\fB\-y\fR, \fB\-\-yes\fR
+answer yes to all safe prompts
+.TP
+\fB\-\-no\-cert\-checks\fR
+disable verifying ssl certs (unsafe)
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.SS pre\-upload hooks:
+.TP
+\fB\-\-no\-verify\fR
+Do not run the pre\-upload hook.
+.TP
+\fB\-\-verify\fR
+Run the pre\-upload hook without prompting.
+.TP
+\fB\-\-ignore\-hooks\fR
+Do not abort if pre\-upload hooks fail.
+.PP
+Run `repo help upload` to view the detailed manual.
+.SH DETAILS
+.PP
+The 'repo upload' command is used to send changes to the Gerrit Code Review
+system. It searches for topic branches in local projects that have not yet been
+published for review. If multiple topic branches are found, 'repo upload' opens
+an editor to allow the user to select which branches to upload.
+.PP
+\&'repo upload' searches for uploadable changes in all projects listed at the
+command line. Projects can be specified either by name, or by a relative or
+absolute path to the project's local directory. If no projects are specified,
+\&'repo upload' will search for uploadable changes in all projects listed in the
+manifest.
+.PP
+If the \fB\-\-reviewers\fR or \fB\-\-cc\fR options are passed, those emails are added to the
+respective list of users, and emails are sent to any new users. Users passed as
+\fB\-\-reviewers\fR must already be registered with the code review system, or the
+upload will fail.
+.PP
+Configuration
+.PP
+review.URL.autoupload:
+.PP
+To disable the "Upload ... (y/N)?" prompt, you can set a per\-project or global
+Git configuration option. If review.URL.autoupload is set to "true" then repo
+will assume you always answer "y" at the prompt, and will not prompt you
+further. If it is set to "false" then repo will assume you always answer "n",
+and will abort.
+.PP
+review.URL.autoreviewer:
+.PP
+To automatically append a user or mailing list to reviews, you can set a
+per\-project or global Git option to do so.
+.PP
+review.URL.autocopy:
+.PP
+To automatically copy a user or mailing list to all uploaded reviews, you can
+set a per\-project or global Git option to do so. Specifically,
+review.URL.autocopy can be set to a comma separated list of reviewers who you
+always want copied on all uploads with a non\-empty \fB\-\-re\fR argument.
+.PP
+review.URL.username:
+.PP
+Override the username used to connect to Gerrit Code Review. By default the
+local part of the email address is used.
+.PP
+The URL must match the review URL listed in the manifest XML file, or in the
+\&.git/config within the project. For example:
+.IP
+[remote "origin"]
+.IP
+url = git://git.example.com/project.git
+review = http://review.example.com/
+.IP
+[review "http://review.example.com/"]
+.IP
+autoupload = true
+autocopy = johndoe@company.com,my\-team\-alias@company.com
+.PP
+review.URL.uploadtopic:
+.PP
+To add a topic branch whenever uploading a commit, you can set a per\-project or
+global Git option to do so. If review.URL.uploadtopic is set to "true" then repo
+will assume you always want the equivalent of the \fB\-t\fR option to the repo command.
+If unset or set to "false" then repo will make use of only the command line
+option.
+.PP
+review.URL.uploadhashtags:
+.PP
+To add hashtags whenever uploading a commit, you can set a per\-project or global
+Git option to do so. The value of review.URL.uploadhashtags will be used as
+comma delimited hashtags like the \fB\-\-hashtag\fR option.
+.PP
+review.URL.uploadlabels:
+.PP
+To add labels whenever uploading a commit, you can set a per\-project or global
+Git option to do so. The value of review.URL.uploadlabels will be used as comma
+delimited labels like the \fB\-\-label\fR option.
+.PP
+review.URL.uploadnotify:
+.PP
+Control e\-mail notifications when uploading.
+https://gerrit\-review.googlesource.com/Documentation/user\-upload.html#notify
+.PP
+References
+.PP
+Gerrit Code Review: https://www.gerritcodereview.com/
diff --git a/man/repo-version.1 b/man/repo-version.1
new file mode 100644
index 0000000..cc703f6
--- /dev/null
+++ b/man/repo-version.1
@@ -0,0 +1,24 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo version" "Repo Manual"
+.SH NAME
+repo \- repo version - manual page for repo version
+.SH SYNOPSIS
+.B repo
+\fI\,version\/\fR
+.SH DESCRIPTION
+Summary
+.PP
+Display the version of repo
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help version` to view the detailed manual.
diff --git a/man/repo.1 b/man/repo.1
new file mode 100644
index 0000000..4aa7638
--- /dev/null
+++ b/man/repo.1
@@ -0,0 +1,133 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo" "Repo Manual"
+.SH NAME
+repo \- repository management tool built on top of git
+.SH SYNOPSIS
+.B repo
+[\fI\,-p|--paginate|--no-pager\/\fR] \fI\,COMMAND \/\fR[\fI\,ARGS\/\fR]
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-\-help\-all\fR
+show this help message with all subcommands and exit
+.TP
+\fB\-p\fR, \fB\-\-paginate\fR
+display command output in the pager
+.TP
+\fB\-\-no\-pager\fR
+disable the pager
+.TP
+\fB\-\-color\fR=\fI\,COLOR\/\fR
+control color usage: auto, always, never
+.TP
+\fB\-\-trace\fR
+trace git command execution (REPO_TRACE=1)
+.TP
+\fB\-\-trace\-python\fR
+trace python command execution
+.TP
+\fB\-\-time\fR
+time repo command execution
+.TP
+\fB\-\-version\fR
+display this version of repo
+.TP
+\fB\-\-show\-toplevel\fR
+display the path of the top\-level directory of the
+repo client checkout
+.TP
+\fB\-\-event\-log\fR=\fI\,EVENT_LOG\/\fR
+filename of event log to append timeline to
+.TP
+\fB\-\-git\-trace2\-event\-log\fR=\fI\,GIT_TRACE2_EVENT_LOG\/\fR
+directory to write git trace2 event log to
+.SS "The complete list of recognized repo commands are:"
+.TP
+abandon
+Permanently abandon a development branch
+.TP
+branch
+View current topic branches
+.TP
+branches
+View current topic branches
+.TP
+checkout
+Checkout a branch for development
+.TP
+cherry\-pick
+Cherry\-pick a change.
+.TP
+diff
+Show changes between commit and working tree
+.TP
+diffmanifests
+Manifest diff utility
+.TP
+download
+Download and checkout a change
+.TP
+forall
+Run a shell command in each project
+.TP
+gitc\-delete
+Delete a GITC Client.
+.TP
+gitc\-init
+Initialize a GITC Client.
+.TP
+grep
+Print lines matching a pattern
+.TP
+help
+Display detailed help on a command
+.TP
+info
+Get info on the manifest branch, current branch or unmerged branches
+.TP
+init
+Initialize a repo client checkout in the current directory
+.TP
+list
+List projects and their associated directories
+.TP
+manifest
+Manifest inspection utility
+.TP
+overview
+Display overview of unmerged project branches
+.TP
+prune
+Prune (delete) already merged topics
+.TP
+rebase
+Rebase local branches on upstream branch
+.TP
+selfupdate
+Update repo to the latest version
+.TP
+smartsync
+Update working tree to the latest known good revision
+.TP
+stage
+Stage file(s) for commit
+.TP
+start
+Start a new branch for development
+.TP
+status
+Show the working tree status
+.TP
+sync
+Update working tree to the latest revision
+.TP
+upload
+Upload changes for code review
+.TP
+version
+Display the version of repo
+.PP
+See 'repo help <command>' for more information on a specific command.
+Bug reports: https://bugs.chromium.org/p/gerrit/issues/entry?template=Repo+tool+issue
diff --git a/manifest_xml.py b/manifest_xml.py
index 0c2b45e..68ead53 100644
--- a/manifest_xml.py
+++ b/manifest_xml.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import collections
 import itertools
 import os
 import platform
@@ -24,14 +25,21 @@
 from git_config import GitConfig, IsId
 from git_refs import R_HEADS, HEAD
 import platform_utils
-from project import RemoteSpec, Project, MetaProject
+from project import Annotation, RemoteSpec, Project, MetaProject
 from error import (ManifestParseError, ManifestInvalidPathError,
                    ManifestInvalidRevisionError)
+from wrapper import Wrapper
 
 MANIFEST_FILE_NAME = 'manifest.xml'
 LOCAL_MANIFEST_NAME = 'local_manifest.xml'
 LOCAL_MANIFESTS_DIR_NAME = 'local_manifests'
 
+# Add all projects from local manifest into a group.
+LOCAL_MANIFEST_GROUP_PREFIX = 'local:'
+
+# ContactInfo has the self-registered bug url, supplied by the manifest authors.
+ContactInfo = collections.namedtuple('ContactInfo', 'bugurl')
+
 # urljoin gets confused if the scheme is not known.
 urllib.parse.uses_relative.extend([
     'ssh',
@@ -114,9 +122,13 @@
   sync_tags = True
 
   def __eq__(self, other):
+    if not isinstance(other, _Default):
+      return False
     return self.__dict__ == other.__dict__
 
   def __ne__(self, other):
+    if not isinstance(other, _Default):
+      return True
     return self.__dict__ != other.__dict__
 
 
@@ -137,14 +149,22 @@
     self.reviewUrl = review
     self.revision = revision
     self.resolvedFetchUrl = self._resolveFetchUrl()
+    self.annotations = []
 
   def __eq__(self, other):
-    return self.__dict__ == other.__dict__
+    if not isinstance(other, _XmlRemote):
+      return False
+    return (sorted(self.annotations) == sorted(other.annotations) and
+      self.name == other.name and self.fetchUrl == other.fetchUrl and
+      self.pushUrl == other.pushUrl and self.remoteAlias == other.remoteAlias
+      and self.reviewUrl == other.reviewUrl and self.revision == other.revision)
 
   def __ne__(self, other):
-    return self.__dict__ != other.__dict__
+    return not self.__eq__(other)
 
   def _resolveFetchUrl(self):
+    if self.fetchUrl is None:
+      return ''
     url = self.fetchUrl.rstrip('/')
     manifestUrl = self.manifestUrl.rstrip('/')
     # urljoin will gets confused over quite a few things.  The ones we care
@@ -173,6 +193,9 @@
                       orig_name=self.name,
                       fetchUrl=self.fetchUrl)
 
+  def AddAnnotation(self, name, value, keep):
+    self.annotations.append(Annotation(name, value, keep))
+
 
 class XmlManifest(object):
   """manages the repo configuration file"""
@@ -247,8 +270,7 @@
     self.Override(name)
 
     # Old versions of repo would generate symlinks we need to clean up.
-    if os.path.lexists(self.manifestFile):
-      platform_utils.remove(self.manifestFile)
+    platform_utils.remove(self.manifestFile, missing_ok=True)
     # This file is interpreted as if it existed inside the manifest repo.
     # That allows us to use <include> with the relative file name.
     with open(self.manifestFile, 'w') as fp:
@@ -282,6 +304,13 @@
     if r.revision is not None:
       e.setAttribute('revision', r.revision)
 
+    for a in r.annotations:
+      if a.keep == 'true':
+        ae = doc.createElement('annotation')
+        ae.setAttribute('name', a.name)
+        ae.setAttribute('value', a.value)
+        e.appendChild(ae)
+
   def _ParseList(self, field):
     """Parse fields that contain flattened lists.
 
@@ -477,6 +506,15 @@
       if not d.remote or remote.orig_name != remoteName:
         remoteName = remote.orig_name
         e.setAttribute('remote', remoteName)
+      revision = remote.revision or d.revisionExpr
+      if not revision or revision != self._superproject['revision']:
+        e.setAttribute('revision', self._superproject['revision'])
+      root.appendChild(e)
+
+    if self._contactinfo.bugurl != Wrapper().BUG_URL:
+      root.appendChild(doc.createTextNode(''))
+      e = doc.createElement('contactinfo')
+      e.setAttribute('bugurl', self._contactinfo.bugurl)
       root.appendChild(e)
 
     return doc
@@ -490,6 +528,7 @@
         'manifest-server',
         'repo-hooks',
         'superproject',
+        'contactinfo',
     }
     # Elements that may be repeated.
     MULTI_ELEMENTS = {
@@ -566,6 +605,11 @@
     return self._superproject
 
   @property
+  def contactinfo(self):
+    self._Load()
+    return self._contactinfo
+
+  @property
   def notice(self):
     self._Load()
     return self._notice
@@ -596,6 +640,17 @@
     return set(x.strip() for x in exclude.split(','))
 
   @property
+  def UseLocalManifests(self):
+    return self._load_local_manifests
+
+  def SetUseLocalManifests(self, value):
+    self._load_local_manifests = value
+
+  @property
+  def HasLocalManifests(self):
+    return self._load_local_manifests and self.local_manifests
+
+  @property
   def IsMirror(self):
     return self.manifestProject.config.GetBoolean('repo.mirror')
 
@@ -630,6 +685,7 @@
     self._default = None
     self._repo_hooks_project = None
     self._superproject = {}
+    self._contactinfo = ContactInfo(Wrapper().BUG_URL)
     self._notice = None
     self.branch = None
     self._manifest_server = None
@@ -657,7 +713,9 @@
               # Since local manifests are entirely managed by the user, allow
               # them to point anywhere the user wants.
               nodes.append(self._ParseManifestXml(
-                  local, self.repodir, restrict_includes=False))
+                  local, self.repodir,
+                  parent_groups=f'{LOCAL_MANIFEST_GROUP_PREFIX}:{local_file[:-4]}',
+                  restrict_includes=False))
         except OSError:
           pass
 
@@ -754,9 +812,10 @@
     for node in itertools.chain(*node_list):
       if node.nodeName == 'default':
         new_default = self._ParseDefault(node)
+        emptyDefault = not node.hasAttributes() and not node.hasChildNodes()
         if self._default is None:
           self._default = new_default
-        elif new_default != self._default:
+        elif not emptyDefault and new_default != self._default:
           raise ManifestParseError('duplicate default in %s' %
                                    (self.manifestFile))
 
@@ -795,6 +854,8 @@
       for subproject in project.subprojects:
         recursively_add_projects(subproject)
 
+    repo_hooks_project = None
+    enabled_repo_hooks = None
     for node in itertools.chain(*node_list):
       if node.nodeName == 'project':
         project = self._ParseProject(node)
@@ -807,6 +868,7 @@
                                    'project: %s' % name)
 
         path = node.getAttribute('path')
+        dest_path = node.getAttribute('dest-path')
         groups = node.getAttribute('groups')
         if groups:
           groups = self._ParseList(groups)
@@ -815,46 +877,37 @@
         if remote:
           remote = self._get_remote(node)
 
+        named_projects = self._projects[name]
+        if dest_path and not path and len(named_projects) > 1:
+          raise ManifestParseError('extend-project cannot use dest-path when '
+                                   'matching multiple projects: %s' % name)
         for p in self._projects[name]:
           if path and p.relpath != path:
             continue
           if groups:
             p.groups.extend(groups)
           if revision:
-            p.revisionExpr = revision
-            if IsId(revision):
-              p.revisionId = revision
-            else:
-              p.revisionId = None
+            p.SetRevision(revision)
+
           if remote:
             p.remote = remote.ToRemoteSpec(name)
-      if node.nodeName == 'repo-hooks':
-        # Get the name of the project and the (space-separated) list of enabled.
-        repo_hooks_project = self._reqatt(node, 'in-project')
-        enabled_repo_hooks = self._ParseList(self._reqatt(node, 'enabled-list'))
 
+          if dest_path:
+            del self._paths[p.relpath]
+            relpath, worktree, gitdir, objdir, _ = self.GetProjectPaths(name, dest_path)
+            p.UpdatePaths(relpath, worktree, gitdir, objdir)
+            self._paths[p.relpath] = p
+
+      if node.nodeName == 'repo-hooks':
         # Only one project can be the hooks project
-        if self._repo_hooks_project is not None:
+        if repo_hooks_project is not None:
           raise ManifestParseError(
               'duplicate repo-hooks in %s' %
               (self.manifestFile))
 
-        # Store a reference to the Project.
-        try:
-          repo_hooks_projects = self._projects[repo_hooks_project]
-        except KeyError:
-          raise ManifestParseError(
-              'project %s not found for repo-hooks' %
-              (repo_hooks_project))
-
-        if len(repo_hooks_projects) != 1:
-          raise ManifestParseError(
-              'internal error parsing repo-hooks in %s' %
-              (self.manifestFile))
-        self._repo_hooks_project = repo_hooks_projects[0]
-
-        # Store the enabled hooks in the Project object.
-        self._repo_hooks_project.enabled_repo_hooks = enabled_repo_hooks
+        # Get the name of the project and the (space-separated) list of enabled.
+        repo_hooks_project = self._reqatt(node, 'in-project')
+        enabled_repo_hooks = self._ParseList(self._reqatt(node, 'enabled-list'))
       if node.nodeName == 'superproject':
         name = self._reqatt(node, 'name')
         # There can only be one superproject.
@@ -872,21 +925,51 @@
           raise ManifestParseError("no remote for superproject %s within %s" %
                                    (name, self.manifestFile))
         self._superproject['remote'] = remote.ToRemoteSpec(name)
+        revision = node.getAttribute('revision') or remote.revision
+        if not revision:
+          revision = self._default.revisionExpr
+        if not revision:
+          raise ManifestParseError('no revision for superproject %s within %s' %
+                                   (name, self.manifestFile))
+        self._superproject['revision'] = revision
+      if node.nodeName == 'contactinfo':
+        bugurl = self._reqatt(node, 'bugurl')
+        # This element can be repeated, later entries will clobber earlier ones.
+        self._contactinfo = ContactInfo(bugurl)
+
       if node.nodeName == 'remove-project':
         name = self._reqatt(node, 'name')
 
-        if name not in self._projects:
+        if name in self._projects:
+          for p in self._projects[name]:
+            del self._paths[p.relpath]
+          del self._projects[name]
+
+          # If the manifest removes the hooks project, treat it as if it deleted
+          # the repo-hooks element too.
+          if repo_hooks_project == name:
+            repo_hooks_project = None
+        elif not XmlBool(node, 'optional', False):
           raise ManifestParseError('remove-project element specifies non-existent '
                                    'project: %s' % name)
 
-        for p in self._projects[name]:
-          del self._paths[p.relpath]
-        del self._projects[name]
+    # Store repo hooks project information.
+    if repo_hooks_project:
+      # Store a reference to the Project.
+      try:
+        repo_hooks_projects = self._projects[repo_hooks_project]
+      except KeyError:
+        raise ManifestParseError(
+            'project %s not found for repo-hooks' %
+            (repo_hooks_project))
 
-        # If the manifest removes the hooks project, treat it as if it deleted
-        # the repo-hooks element too.
-        if self._repo_hooks_project and (self._repo_hooks_project.name == name):
-          self._repo_hooks_project = None
+      if len(repo_hooks_projects) != 1:
+        raise ManifestParseError(
+            'internal error parsing repo-hooks in %s' %
+            (self.manifestFile))
+      self._repo_hooks_project = repo_hooks_projects[0]
+      # Store the enabled hooks in the Project object.
+      self._repo_hooks_project.enabled_repo_hooks = enabled_repo_hooks
 
   def _AddMetaProjectMirror(self, m):
     name = None
@@ -945,7 +1028,14 @@
     if revision == '':
       revision = None
     manifestUrl = self.manifestProject.config.GetString('remote.origin.url')
-    return _XmlRemote(name, alias, fetch, pushUrl, manifestUrl, review, revision)
+
+    remote = _XmlRemote(name, alias, fetch, pushUrl, manifestUrl, review, revision)
+
+    for n in node.childNodes:
+      if n.nodeName == 'annotation':
+        self._ParseAnnotation(remote, n)
+
+    return remote
 
   def _ParseDefault(self, node):
     """
@@ -1199,6 +1289,8 @@
     if '~' in path:
       return '~ not allowed (due to 8.3 filenames on Windows filesystems)'
 
+    path_codepoints = set(path)
+
     # Some filesystems (like Apple's HFS+) try to normalize Unicode codepoints
     # which means there are alternative names for ".git".  Reject paths with
     # these in it as there shouldn't be any reasonable need for them here.
@@ -1222,10 +1314,17 @@
         u'\u206F',  # NOMINAL DIGIT SHAPES
         u'\uFEFF',  # ZERO WIDTH NO-BREAK SPACE
     }
-    if BAD_CODEPOINTS & set(path):
+    if BAD_CODEPOINTS & path_codepoints:
       # This message is more expansive than reality, but should be fine.
       return 'Unicode combining characters not allowed'
 
+    # Reject newlines as there shouldn't be any legitmate use for them, they'll
+    # be confusing to users, and they can easily break tools that expect to be
+    # able to iterate over newline delimited lists.  This even applies to our
+    # own code like .repo/project.list.
+    if {'\r', '\n'} & path_codepoints:
+      return 'Newlines not allowed'
+
     # Assume paths might be used on case-insensitive filesystems.
     path = path.lower()
 
@@ -1303,7 +1402,7 @@
       self._ValidateFilePaths('linkfile', src, dest)
       project.AddLinkFile(src, dest, self.topdir)
 
-  def _ParseAnnotation(self, project, node):
+  def _ParseAnnotation(self, element, node):
     name = self._reqatt(node, 'name')
     value = self._reqatt(node, 'value')
     try:
@@ -1313,7 +1412,7 @@
     if keep != "true" and keep != "false":
       raise ManifestParseError('optional "keep" attribute must be '
                                '"true" or "false"')
-    project.AddAnnotation(name, value, keep)
+    element.AddAnnotation(name, value, keep)
 
   def _get_remote(self, node):
     name = node.getAttribute('remote')
diff --git a/platform_utils.py b/platform_utils.py
index 00c51d9..0203249 100644
--- a/platform_utils.py
+++ b/platform_utils.py
@@ -124,31 +124,30 @@
       else:
         raise
   else:
-    os.rename(src, dst)
+    shutil.move(src, dst)
 
 
-def remove(path):
+def remove(path, missing_ok=False):
   """Remove (delete) the file path. This is a replacement for os.remove that
   allows deleting read-only files on Windows, with support for long paths and
   for deleting directory symbolic links.
 
   Availability: Unix, Windows."""
-  if isWindows():
-    longpath = _makelongpath(path)
-    try:
-      os.remove(longpath)
-    except OSError as e:
-      if e.errno == errno.EACCES:
-        os.chmod(longpath, stat.S_IWRITE)
-        # Directory symbolic links must be deleted with 'rmdir'.
-        if islink(longpath) and isdir(longpath):
-          os.rmdir(longpath)
-        else:
-          os.remove(longpath)
+  longpath = _makelongpath(path) if isWindows() else path
+  try:
+    os.remove(longpath)
+  except OSError as e:
+    if e.errno == errno.EACCES:
+      os.chmod(longpath, stat.S_IWRITE)
+      # Directory symbolic links must be deleted with 'rmdir'.
+      if islink(longpath) and isdir(longpath):
+        os.rmdir(longpath)
       else:
-        raise
-  else:
-    os.remove(path)
+        os.remove(longpath)
+    elif missing_ok and e.errno == errno.ENOENT:
+      pass
+    else:
+      raise
 
 
 def walk(top, topdown=True, onerror=None, followlinks=False):
diff --git a/project.py b/project.py
index 992a0c0..5b26b64 100644
--- a/project.py
+++ b/project.py
@@ -251,13 +251,29 @@
     self.fail = self.printer('fail', fg='red')
 
 
-class _Annotation(object):
+class Annotation(object):
 
   def __init__(self, name, value, keep):
     self.name = name
     self.value = value
     self.keep = keep
 
+  def __eq__(self, other):
+    if not isinstance(other, Annotation):
+      return False
+    return self.__dict__ == other.__dict__
+
+  def __lt__(self, other):
+    # This exists just so that lists of Annotation objects can be sorted, for
+    # use in comparisons.
+    if not isinstance(other, Annotation):
+      raise ValueError('comparison is not between two Annotation objects')
+    if self.name == other.name:
+      if self.value == other.value:
+        return self.keep < other.keep
+      return self.value < other.value
+    return self.name < other.name
+
 
 def _SafeExpandPath(base, subpath, skipfinal=False):
   """Make sure |subpath| is completely safe under |base|.
@@ -503,21 +519,8 @@
     self.client = self.manifest = manifest
     self.name = name
     self.remote = remote
-    self.gitdir = gitdir.replace('\\', '/')
-    self.objdir = objdir.replace('\\', '/')
-    if worktree:
-      self.worktree = os.path.normpath(worktree).replace('\\', '/')
-    else:
-      self.worktree = None
-    self.relpath = relpath
-    self.revisionExpr = revisionExpr
-
-    if revisionId is None \
-            and revisionExpr \
-            and IsId(revisionExpr):
-      self.revisionId = revisionExpr
-    else:
-      self.revisionId = revisionId
+    self.UpdatePaths(relpath, worktree, gitdir, objdir)
+    self.SetRevision(revisionExpr, revisionId=revisionId)
 
     self.rebase = rebase
     self.groups = groups
@@ -540,16 +543,6 @@
     self.copyfiles = []
     self.linkfiles = []
     self.annotations = []
-    self.config = GitConfig.ForRepository(gitdir=self.gitdir,
-                                          defaults=self.client.globalConfig)
-
-    if self.worktree:
-      self.work_git = self._GitGetByExec(self, bare=False, gitdir=gitdir)
-    else:
-      self.work_git = None
-    self.bare_git = self._GitGetByExec(self, bare=True, gitdir=gitdir)
-    self.bare_ref = GitRefs(gitdir)
-    self.bare_objdir = self._GitGetByExec(self, bare=True, gitdir=objdir)
     self.dest_branch = dest_branch
     self.old_revision = old_revision
 
@@ -557,6 +550,35 @@
     # project containing repo hooks.
     self.enabled_repo_hooks = []
 
+  def SetRevision(self, revisionExpr, revisionId=None):
+    """Set revisionId based on revision expression and id"""
+    self.revisionExpr = revisionExpr
+    if revisionId is None and revisionExpr and IsId(revisionExpr):
+      self.revisionId = self.revisionExpr
+    else:
+      self.revisionId = revisionId
+
+  def UpdatePaths(self, relpath, worktree, gitdir, objdir):
+    """Update paths used by this project"""
+    self.gitdir = gitdir.replace('\\', '/')
+    self.objdir = objdir.replace('\\', '/')
+    if worktree:
+      self.worktree = os.path.normpath(worktree).replace('\\', '/')
+    else:
+      self.worktree = None
+    self.relpath = relpath
+
+    self.config = GitConfig.ForRepository(gitdir=self.gitdir,
+                                          defaults=self.manifest.globalConfig)
+
+    if self.worktree:
+      self.work_git = self._GitGetByExec(self, bare=False, gitdir=self.gitdir)
+    else:
+      self.work_git = None
+    self.bare_git = self._GitGetByExec(self, bare=True, gitdir=self.gitdir)
+    self.bare_ref = GitRefs(self.gitdir)
+    self.bare_objdir = self._GitGetByExec(self, bare=True, gitdir=self.objdir)
+
   @property
   def Derived(self):
     return self.is_derived
@@ -1041,15 +1063,16 @@
                        verbose=False,
                        output_redir=None,
                        is_new=None,
-                       current_branch_only=False,
+                       current_branch_only=None,
                        force_sync=False,
                        clone_bundle=True,
-                       tags=True,
+                       tags=None,
                        archive=False,
                        optimized_fetch=False,
                        retry_fetches=0,
                        prune=False,
                        submodules=False,
+                       ssh_proxy=None,
                        clone_filter=None,
                        partial_clone_exclude=set()):
     """Perform only the network IO portion of the sync process.
@@ -1116,7 +1139,7 @@
             and self._ApplyCloneBundle(initial=is_new, quiet=quiet, verbose=verbose)):
       is_new = False
 
-    if not current_branch_only:
+    if current_branch_only is None:
       if self.sync_c:
         current_branch_only = True
       elif not self.manifest._loaded:
@@ -1125,8 +1148,8 @@
       elif self.manifest.default.sync_c:
         current_branch_only = True
 
-    if not self.sync_tags:
-      tags = False
+    if tags is None:
+      tags = self.sync_tags
 
     if self.clone_depth:
       depth = self.clone_depth
@@ -1143,6 +1166,7 @@
               alt_dir=alt_dir, current_branch_only=current_branch_only,
               tags=tags, prune=prune, depth=depth,
               submodules=submodules, force_sync=force_sync,
+              ssh_proxy=ssh_proxy,
               clone_filter=clone_filter, retry_fetches=retry_fetches):
         return False
 
@@ -1164,10 +1188,8 @@
       self._InitMRef()
     else:
       self._InitMirrorHead()
-      try:
-        platform_utils.remove(os.path.join(self.gitdir, 'FETCH_HEAD'))
-      except OSError:
-        pass
+      platform_utils.remove(os.path.join(self.gitdir, 'FETCH_HEAD'),
+                            missing_ok=True)
     return True
 
   def PostRepoUpgrade(self):
@@ -1214,6 +1236,9 @@
                                          (self.revisionExpr, self.name))
 
   def SetRevisionId(self, revisionId):
+    if self.revisionExpr:
+      self.upstream = self.revisionExpr
+
     self.revisionId = revisionId
 
   def Sync_LocalHalf(self, syncbuf, force_sync=False, submodules=False):
@@ -1443,7 +1468,7 @@
     self.linkfiles.append(_LinkFile(self.worktree, src, topdir, dest))
 
   def AddAnnotation(self, name, value, keep):
-    self.annotations.append(_Annotation(name, value, keep))
+    self.annotations.append(Annotation(name, value, keep))
 
   def DownloadPatchSet(self, change_id, patch_id):
     """Download a single patch set of a single change to FETCH_HEAD.
@@ -1962,6 +1987,11 @@
       # throws an error.
       self.bare_git.rev_list('-1', '--missing=allow-any',
                              '%s^0' % self.revisionExpr, '--')
+      if self.upstream:
+        rev = self.GetRemote(self.remote.name).ToLocal(self.upstream)
+        self.bare_git.rev_list('-1', '--missing=allow-any',
+                               '%s^0' % rev, '--')
+        self.bare_git.merge_base('--is-ancestor', self.revisionExpr, rev)
       return True
     except GitError:
       # There is no such persistent revision. We have to fetch it.
@@ -1991,6 +2021,7 @@
                    prune=False,
                    depth=None,
                    submodules=False,
+                   ssh_proxy=None,
                    force_sync=False,
                    clone_filter=None,
                    retry_fetches=2,
@@ -2038,16 +2069,14 @@
     if not name:
       name = self.remote.name
 
-    ssh_proxy = False
     remote = self.GetRemote(name)
-    if remote.PreConnectFetch():
-      ssh_proxy = True
+    if not remote.PreConnectFetch(ssh_proxy):
+      ssh_proxy = None
 
     if initial:
       if alt_dir and 'objects' == os.path.basename(alt_dir):
         ref_dir = os.path.dirname(alt_dir)
         packed_refs = os.path.join(self.gitdir, 'packed-refs')
-        remote = self.GetRemote(name)
 
         all_refs = self.bare_ref.all
         ids = set(all_refs.values())
@@ -2134,6 +2163,8 @@
       # Shallow checkout of a specific commit, fetch from that commit and not
       # the heads only as the commit might be deeper in the history.
       spec.append(branch)
+      if self.upstream:
+        spec.append(self.upstream)
     else:
       if is_sha1:
         branch = self.upstream
@@ -2191,7 +2222,7 @@
         ret = prunecmd.Wait()
         if ret:
           break
-        output_redir.write('retrying fetch after pruning remote branches')
+        print('retrying fetch after pruning remote branches', file=output_redir)
         # Continue right away so we don't sleep as we shouldn't need to.
         continue
       elif current_branch_only and is_sha1 and ret == 128:
@@ -2204,10 +2235,11 @@
         break
 
       # Figure out how long to sleep before the next attempt, if there is one.
-      if not verbose:
-        output_redir.write('\n%s:\n%s' % (self.name, gitcmd.stdout))
+      if not verbose and gitcmd.stdout:
+        print('\n%s:\n%s' % (self.name, gitcmd.stdout), end='', file=output_redir)
       if try_n < retry_fetches - 1:
-        output_redir.write('sleeping %s seconds before retrying' % retry_cur_sleep)
+        print('%s: sleeping %s seconds before retrying' % (self.name, retry_cur_sleep),
+              file=output_redir)
         time.sleep(retry_cur_sleep)
         retry_cur_sleep = min(retry_exp_factor * retry_cur_sleep,
                               MAXIMUM_RETRY_SLEEP_SEC)
@@ -2233,7 +2265,7 @@
             name=name, quiet=quiet, verbose=verbose, output_redir=output_redir,
             current_branch_only=current_branch_only and depth,
             initial=False, alt_dir=alt_dir,
-            depth=None, clone_filter=clone_filter)
+            depth=None, ssh_proxy=ssh_proxy, clone_filter=clone_filter)
 
     return ok
 
@@ -2279,15 +2311,12 @@
     cmd.append('+refs/tags/*:refs/tags/*')
 
     ok = GitCommand(self, cmd, bare=True).Wait() == 0
-    if os.path.exists(bundle_dst):
-      platform_utils.remove(bundle_dst)
-    if os.path.exists(bundle_tmp):
-      platform_utils.remove(bundle_tmp)
+    platform_utils.remove(bundle_dst, missing_ok=True)
+    platform_utils.remove(bundle_tmp, missing_ok=True)
     return ok
 
   def _FetchBundle(self, srcUrl, tmpPath, dstPath, quiet, verbose):
-    if os.path.exists(dstPath):
-      platform_utils.remove(dstPath)
+    platform_utils.remove(dstPath, missing_ok=True)
 
     cmd = ['curl', '--fail', '--output', tmpPath, '--netrc', '--location']
     if quiet:
@@ -2438,14 +2467,6 @@
         self.bare_objdir.init()
 
         if self.use_git_worktrees:
-          # Set up the m/ space to point to the worktree-specific ref space.
-          # We'll update the worktree-specific ref space on each checkout.
-          if self.manifest.branch:
-            self.bare_git.symbolic_ref(
-                '-m', 'redirecting to worktree scope',
-                R_M + self.manifest.branch,
-                R_WORKTREE_M + self.manifest.branch)
-
           # Enable per-worktree config file support if possible.  This is more a
           # nice-to-have feature for users rather than a hard requirement.
           if git_require((2, 20, 0)):
@@ -2582,6 +2603,14 @@
   def _InitMRef(self):
     if self.manifest.branch:
       if self.use_git_worktrees:
+        # Set up the m/ space to point to the worktree-specific ref space.
+        # We'll update the worktree-specific ref space on each checkout.
+        ref = R_M + self.manifest.branch
+        if not self.bare_ref.symref(ref):
+          self.bare_git.symbolic_ref(
+              '-m', 'redirecting to worktree scope',
+              ref, R_WORKTREE_M + self.manifest.branch)
+
         # We can't update this ref with git worktrees until it exists.
         # We'll wait until the initial checkout to set it.
         if not os.path.exists(self.worktree):
@@ -2711,10 +2740,7 @@
         # If the source file doesn't exist, ensure the destination
         # file doesn't either.
         if name in symlink_files and not os.path.lexists(src):
-          try:
-            platform_utils.remove(dst)
-          except OSError:
-            pass
+          platform_utils.remove(dst, missing_ok=True)
 
       except OSError as e:
         if e.errno == errno.EPERM:
diff --git a/release/update-manpages b/release/update-manpages
new file mode 100755
index 0000000..ddbce0c
--- /dev/null
+++ b/release/update-manpages
@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+# Copyright (C) 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Helper tool for generating manual page for all repo commands.
+
+This is intended to be run before every official Repo release.
+"""
+
+from pathlib import Path
+from functools import partial
+import argparse
+import multiprocessing
+import os
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+
+TOPDIR = Path(__file__).resolve().parent.parent
+MANDIR = TOPDIR.joinpath('man')
+
+# Load repo local modules.
+sys.path.insert(0, str(TOPDIR))
+from git_command import RepoSourceVersion
+import subcmds
+
+def worker(cmd, **kwargs):
+  subprocess.run(cmd, **kwargs)
+
+def main(argv):
+  parser = argparse.ArgumentParser(description=__doc__)
+  opts = parser.parse_args(argv)
+
+  if not shutil.which('help2man'):
+    sys.exit('Please install help2man to continue.')
+
+  # Let repo know we're generating man pages so it can avoid some dynamic
+  # behavior (like probing active number of CPUs).  We use a weird name &
+  # value to make it less likely for users to set this var themselves.
+  os.environ['_REPO_GENERATE_MANPAGES_'] = ' indeed! '
+
+  # "repo branch" is an alias for "repo branches".
+  del subcmds.all_commands['branch']
+  (MANDIR / 'repo-branch.1').write_text('.so man1/repo-branches.1')
+
+  version = RepoSourceVersion()
+  cmdlist = [['help2man', '-N', '-n', f'repo {cmd} - manual page for repo {cmd}',
+    '-S', f'repo {cmd}', '-m', 'Repo Manual', f'--version-string={version}',
+    '-o', MANDIR.joinpath(f'repo-{cmd}.1.tmp'), TOPDIR.joinpath('repo'),
+    '-h', f'help {cmd}'] for cmd in subcmds.all_commands]
+  cmdlist.append(['help2man', '-N', '-n', 'repository management tool built on top of git',
+    '-S', 'repo', '-m', 'Repo Manual', f'--version-string={version}',
+    '-o', MANDIR.joinpath('repo.1.tmp'), TOPDIR.joinpath('repo'),
+    '-h', '--help-all'])
+
+  with tempfile.TemporaryDirectory() as tempdir:
+    repo_dir = Path(tempdir) / '.repo'
+    repo_dir.mkdir()
+    (repo_dir / 'repo').symlink_to(TOPDIR)
+
+    # Run all cmd in parallel, and wait for them to finish.
+    with multiprocessing.Pool() as pool:
+      pool.map(partial(worker, cwd=tempdir, check=True), cmdlist)
+
+  regex = (
+      (r'(It was generated by help2man) [0-9.]+', '\g<1>.'),
+      (r'^\.IP\n(.*:)\n', '.SS \g<1>\n'),
+      (r'^\.PP\nDescription', '.SH DETAILS'),
+  )
+  for tmp_path in MANDIR.glob('*.1.tmp'):
+    path = tmp_path.parent / tmp_path.stem
+    old_data = path.read_text() if path.exists() else ''
+
+    data = tmp_path.read_text()
+    tmp_path.unlink()
+
+    for pattern, replacement in regex:
+      data = re.sub(pattern, replacement, data, flags=re.M)
+
+    # If the only thing that changed was the date, don't refresh.  This avoids
+    # a lot of noise when only one file actually updates.
+    old_data = re.sub(r'^(\.TH REPO "1" ")([^"]+)', r'\1', old_data, flags=re.M)
+    new_data = re.sub(r'^(\.TH REPO "1" ")([^"]+)', r'\1', data, flags=re.M)
+    if old_data != new_data:
+      path.write_text(data)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))
diff --git a/repo b/repo
index d9c97de..4cddbf1 100755
--- a/repo
+++ b/repo
@@ -117,7 +117,7 @@
 
     # If the python3 version looks like it's new enough, give it a try.
     if (python3_ver and python3_ver >= MIN_PYTHON_VERSION_HARD
-        and python3_ver != (major, minor)):
+            and python3_ver != (major, minor)):
       reexec('python3')
 
     # We're still here, so diagnose things for the user.
@@ -145,9 +145,11 @@
 REPO_REV = os.environ.get('REPO_REV')
 if not REPO_REV:
   REPO_REV = 'stable'
+# URL to file bug reports for repo tool issues.
+BUG_URL = 'https://bugs.chromium.org/p/gerrit/issues/entry?template=Repo+tool+issue'
 
 # increment this whenever we make important changes to this script
-VERSION = (2, 14)
+VERSION = (2, 17)
 
 # increment this if the MAINTAINER_KEYS block is modified
 KEYRING_VERSION = (2, 3)
@@ -310,6 +312,10 @@
                    metavar='PLATFORM')
   group.add_option('--submodules', action='store_true',
                    help='sync any submodules associated with the manifest repo')
+  group.add_option('--standalone-manifest', action='store_true',
+                   help='download the manifest as a static file '
+                        'rather then create a git checkout of '
+                        'the manifest repo')
 
   # Options that only affect manifest project, and not any of the projects
   # specified in the manifest itself.
@@ -322,8 +328,14 @@
   group.add_option(*cbr_opts,
                    dest='current_branch_only', action='store_true',
                    help='fetch only current manifest branch from server')
+  group.add_option('--no-current-branch',
+                   dest='current_branch_only', action='store_false',
+                   help='fetch all manifest branches from server')
+  group.add_option('--tags',
+                   action='store_true',
+                   help='fetch tags in the manifest')
   group.add_option('--no-tags',
-                   dest='tags', default=True, action='store_false',
+                   dest='tags', action='store_false',
                    help="don't fetch tags in the manifest")
 
   # These are fundamentally different ways of structuring the checkout.
@@ -851,11 +863,10 @@
     try:
       r = urllib.request.urlopen(url)
     except urllib.error.HTTPError as e:
-      if e.code in [401, 403, 404, 501]:
-        return False
-      print('fatal: Cannot get %s' % url, file=sys.stderr)
-      print('fatal: HTTP error %s' % e.code, file=sys.stderr)
-      raise CloneFailure()
+      if e.code not in [400, 401, 403, 404, 501]:
+        print('warning: Cannot get %s' % url, file=sys.stderr)
+        print('warning: HTTP error %s' % e.code, file=sys.stderr)
+      return False
     except urllib.error.URLError as e:
       print('fatal: Cannot get %s' % url, file=sys.stderr)
       print('fatal: error %s' % e.reason, file=sys.stderr)
@@ -1171,6 +1182,7 @@
 
 For access to the full online help, install repo ("repo init").
 """)
+  print('Bug reports:', BUG_URL)
   sys.exit(0)
 
 
@@ -1204,6 +1216,7 @@
     print('OS %s %s (%s)' % (uname.system, uname.release, uname.version))
     print('CPU %s (%s)' %
           (uname.machine, uname.processor if uname.processor else 'unknown'))
+  print('Bug reports:', BUG_URL)
   sys.exit(0)
 
 
diff --git a/requirements.json b/requirements.json
index 86b9a46..cb55cd2 100644
--- a/requirements.json
+++ b/requirements.json
@@ -38,9 +38,9 @@
   # Supported Python versions.
   #
   # python-3.6 is in Ubuntu Bionic.
-  # python-3.5 is in Debian Stretch.
+  # python-3.7 is in Debian Buster.
   "python": {
-    "hard": [3, 5],
+    "hard": [3, 6],
     "soft": [3, 6]
   },
 
diff --git a/run_tests b/run_tests
index 6c6f859..573dd44 100755
--- a/run_tests
+++ b/run_tests
@@ -24,6 +24,10 @@
 
 def find_pytest():
   """Try to locate a good version of pytest."""
+  # If we're in a virtualenv, assume that it's provided the right pytest.
+  if 'VIRTUAL_ENV' in os.environ:
+    return 'pytest'
+
   # Use the Python 3 version if available.
   ret = shutil.which('pytest-3')
   if ret:
diff --git a/setup.py b/setup.py
index 9d0ff5f..17aeae2 100755
--- a/setup.py
+++ b/setup.py
@@ -56,6 +56,6 @@
         'Programming Language :: Python :: 3 :: Only',
         'Topic :: Software Development :: Version Control :: Git',
     ],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     packages=['subcmds'],
 )
diff --git a/ssh.py b/ssh.py
new file mode 100644
index 0000000..0ae8d12
--- /dev/null
+++ b/ssh.py
@@ -0,0 +1,277 @@
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Common SSH management logic."""
+
+import functools
+import multiprocessing
+import os
+import re
+import signal
+import subprocess
+import sys
+import tempfile
+import time
+
+import platform_utils
+from repo_trace import Trace
+
+
+PROXY_PATH = os.path.join(os.path.dirname(__file__), 'git_ssh')
+
+
+def _run_ssh_version():
+  """run ssh -V to display the version number"""
+  return subprocess.check_output(['ssh', '-V'], stderr=subprocess.STDOUT).decode()
+
+
+def _parse_ssh_version(ver_str=None):
+  """parse a ssh version string into a tuple"""
+  if ver_str is None:
+    ver_str = _run_ssh_version()
+  m = re.match(r'^OpenSSH_([0-9.]+)(p[0-9]+)?\s', ver_str)
+  if m:
+    return tuple(int(x) for x in m.group(1).split('.'))
+  else:
+    return ()
+
+
+@functools.lru_cache(maxsize=None)
+def version():
+  """return ssh version as a tuple"""
+  try:
+    return _parse_ssh_version()
+  except subprocess.CalledProcessError:
+    print('fatal: unable to detect ssh version', file=sys.stderr)
+    sys.exit(1)
+
+
+URI_SCP = re.compile(r'^([^@:]*@?[^:/]{1,}):')
+URI_ALL = re.compile(r'^([a-z][a-z+-]*)://([^@/]*@?[^/]*)/')
+
+
+class ProxyManager:
+  """Manage various ssh clients & masters that we spawn.
+
+  This will take care of sharing state between multiprocessing children, and
+  make sure that if we crash, we don't leak any of the ssh sessions.
+
+  The code should work with a single-process scenario too, and not add too much
+  overhead due to the manager.
+  """
+
+  # Path to the ssh program to run which will pass our master settings along.
+  # Set here more as a convenience API.
+  proxy = PROXY_PATH
+
+  def __init__(self, manager):
+    # Protect access to the list of active masters.
+    self._lock = multiprocessing.Lock()
+    # List of active masters (pid).  These will be spawned on demand, and we are
+    # responsible for shutting them all down at the end.
+    self._masters = manager.list()
+    # Set of active masters indexed by "host:port" information.
+    # The value isn't used, but multiprocessing doesn't provide a set class.
+    self._master_keys = manager.dict()
+    # Whether ssh masters are known to be broken, so we give up entirely.
+    self._master_broken = manager.Value('b', False)
+    # List of active ssh sesssions.  Clients will be added & removed as
+    # connections finish, so this list is just for safety & cleanup if we crash.
+    self._clients = manager.list()
+    # Path to directory for holding master sockets.
+    self._sock_path = None
+
+  def __enter__(self):
+    """Enter a new context."""
+    return self
+
+  def __exit__(self, exc_type, exc_value, traceback):
+    """Exit a context & clean up all resources."""
+    self.close()
+
+  def add_client(self, proc):
+    """Track a new ssh session."""
+    self._clients.append(proc.pid)
+
+  def remove_client(self, proc):
+    """Remove a completed ssh session."""
+    try:
+      self._clients.remove(proc.pid)
+    except ValueError:
+      pass
+
+  def add_master(self, proc):
+    """Track a new master connection."""
+    self._masters.append(proc.pid)
+
+  def _terminate(self, procs):
+    """Kill all |procs|."""
+    for pid in procs:
+      try:
+        os.kill(pid, signal.SIGTERM)
+        os.waitpid(pid, 0)
+      except OSError:
+        pass
+
+    # The multiprocessing.list() API doesn't provide many standard list()
+    # methods, so we have to manually clear the list.
+    while True:
+      try:
+        procs.pop(0)
+      except:
+        break
+
+  def close(self):
+    """Close this active ssh session.
+
+    Kill all ssh clients & masters we created, and nuke the socket dir.
+    """
+    self._terminate(self._clients)
+    self._terminate(self._masters)
+
+    d = self.sock(create=False)
+    if d:
+      try:
+        platform_utils.rmdir(os.path.dirname(d))
+      except OSError:
+        pass
+
+  def _open_unlocked(self, host, port=None):
+    """Make sure a ssh master session exists for |host| & |port|.
+
+    If one doesn't exist already, we'll create it.
+
+    We won't grab any locks, so the caller has to do that.  This helps keep the
+    business logic of actually creating the master separate from grabbing locks.
+    """
+    # Check to see whether we already think that the master is running; if we
+    # think it's already running, return right away.
+    if port is not None:
+      key = '%s:%s' % (host, port)
+    else:
+      key = host
+
+    if key in self._master_keys:
+      return True
+
+    if self._master_broken.value or 'GIT_SSH' in os.environ:
+      # Failed earlier, so don't retry.
+      return False
+
+    # We will make two calls to ssh; this is the common part of both calls.
+    command_base = ['ssh', '-o', 'ControlPath %s' % self.sock(), host]
+    if port is not None:
+      command_base[1:1] = ['-p', str(port)]
+
+    # Since the key wasn't in _master_keys, we think that master isn't running.
+    # ...but before actually starting a master, we'll double-check.  This can
+    # be important because we can't tell that that 'git@myhost.com' is the same
+    # as 'myhost.com' where "User git" is setup in the user's ~/.ssh/config file.
+    check_command = command_base + ['-O', 'check']
+    try:
+      Trace(': %s', ' '.join(check_command))
+      check_process = subprocess.Popen(check_command,
+                                       stdout=subprocess.PIPE,
+                                       stderr=subprocess.PIPE)
+      check_process.communicate()  # read output, but ignore it...
+      isnt_running = check_process.wait()
+
+      if not isnt_running:
+        # Our double-check found that the master _was_ infact running.  Add to
+        # the list of keys.
+        self._master_keys[key] = True
+        return True
+    except Exception:
+      # Ignore excpetions.  We we will fall back to the normal command and print
+      # to the log there.
+      pass
+
+    command = command_base[:1] + ['-M', '-N'] + command_base[1:]
+    try:
+      Trace(': %s', ' '.join(command))
+      p = subprocess.Popen(command)
+    except Exception as e:
+      self._master_broken.value = True
+      print('\nwarn: cannot enable ssh control master for %s:%s\n%s'
+            % (host, port, str(e)), file=sys.stderr)
+      return False
+
+    time.sleep(1)
+    ssh_died = (p.poll() is not None)
+    if ssh_died:
+      return False
+
+    self.add_master(p)
+    self._master_keys[key] = True
+    return True
+
+  def _open(self, host, port=None):
+    """Make sure a ssh master session exists for |host| & |port|.
+
+    If one doesn't exist already, we'll create it.
+
+    This will obtain any necessary locks to avoid inter-process races.
+    """
+    # Bail before grabbing the lock if we already know that we aren't going to
+    # try creating new masters below.
+    if sys.platform in ('win32', 'cygwin'):
+      return False
+
+    # Acquire the lock.  This is needed to prevent opening multiple masters for
+    # the same host when we're running "repo sync -jN" (for N > 1) _and_ the
+    # manifest <remote fetch="ssh://xyz"> specifies a different host from the
+    # one that was passed to repo init.
+    with self._lock:
+      return self._open_unlocked(host, port)
+
+  def preconnect(self, url):
+    """If |uri| will create a ssh connection, setup the ssh master for it."""
+    m = URI_ALL.match(url)
+    if m:
+      scheme = m.group(1)
+      host = m.group(2)
+      if ':' in host:
+        host, port = host.split(':')
+      else:
+        port = None
+      if scheme in ('ssh', 'git+ssh', 'ssh+git'):
+        return self._open(host, port)
+      return False
+
+    m = URI_SCP.match(url)
+    if m:
+      host = m.group(1)
+      return self._open(host)
+
+    return False
+
+  def sock(self, create=True):
+    """Return the path to the ssh socket dir.
+
+    This has all the master sockets so clients can talk to them.
+    """
+    if self._sock_path is None:
+      if not create:
+        return None
+      tmp_dir = '/tmp'
+      if not os.path.exists(tmp_dir):
+        tmp_dir = tempfile.gettempdir()
+      if version() < (6, 7):
+        tokens = '%r@%h:%p'
+      else:
+        tokens = '%C'  # hash of %l%h%p%r
+      self._sock_path = os.path.join(
+          tempfile.mkdtemp('', 'ssh-', tmp_dir),
+          'master-' + tokens)
+    return self._sock_path
diff --git a/subcmds/abandon.py b/subcmds/abandon.py
index c7c127d..85d85f5 100644
--- a/subcmds/abandon.py
+++ b/subcmds/abandon.py
@@ -23,7 +23,7 @@
 
 
 class Abandon(Command):
-  common = True
+  COMMON = True
   helpSummary = "Permanently abandon a development branch"
   helpUsage = """
 %prog [--all | <branchname>] [<project>...]
diff --git a/subcmds/branches.py b/subcmds/branches.py
index 2dc102b..6d975ed 100644
--- a/subcmds/branches.py
+++ b/subcmds/branches.py
@@ -62,7 +62,7 @@
 
 
 class Branches(Command):
-  common = True
+  COMMON = True
   helpSummary = "View current topic branches"
   helpUsage = """
 %prog [<project>...]
diff --git a/subcmds/checkout.py b/subcmds/checkout.py
index 4d8009b..9b42948 100644
--- a/subcmds/checkout.py
+++ b/subcmds/checkout.py
@@ -20,7 +20,7 @@
 
 
 class Checkout(Command):
-  common = True
+  COMMON = True
   helpSummary = "Checkout a branch for development"
   helpUsage = """
 %prog <branchname> [<project>...]
diff --git a/subcmds/cherry_pick.py b/subcmds/cherry_pick.py
index fc4998c..7bd858b 100644
--- a/subcmds/cherry_pick.py
+++ b/subcmds/cherry_pick.py
@@ -21,7 +21,7 @@
 
 
 class CherryPick(Command):
-  common = True
+  COMMON = True
   helpSummary = "Cherry-pick a change."
   helpUsage = """
 %prog <sha1>
diff --git a/subcmds/diff.py b/subcmds/diff.py
index 4966bb1..00a7ec2 100644
--- a/subcmds/diff.py
+++ b/subcmds/diff.py
@@ -19,7 +19,7 @@
 
 
 class Diff(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Show changes between commit and working tree"
   helpUsage = """
 %prog [<project>...]
@@ -33,7 +33,7 @@
   def _Options(self, p):
     p.add_option('-u', '--absolute',
                  dest='absolute', action='store_true',
-                 help='Paths are relative to the repository root')
+                 help='paths are relative to the repository root')
 
   def _ExecuteOne(self, absolute, project):
     """Obtains the diff for a specific project.
diff --git a/subcmds/diffmanifests.py b/subcmds/diffmanifests.py
index 392e597..f6cc30a 100644
--- a/subcmds/diffmanifests.py
+++ b/subcmds/diffmanifests.py
@@ -31,7 +31,7 @@
   deeper level.
   """
 
-  common = True
+  COMMON = True
   helpSummary = "Manifest diff utility"
   helpUsage = """%prog manifest1.xml [manifest2.xml] [options]"""
 
@@ -68,10 +68,10 @@
   def _Options(self, p):
     p.add_option('--raw',
                  dest='raw', action='store_true',
-                 help='Display raw diff.')
+                 help='display raw diff')
     p.add_option('--no-color',
                  dest='color', action='store_false', default=True,
-                 help='does not display the diff in color.')
+                 help='does not display the diff in color')
     p.add_option('--pretty-format',
                  dest='pretty_format', action='store',
                  metavar='<FORMAT>',
diff --git a/subcmds/download.py b/subcmds/download.py
index 81d997e..523f25e 100644
--- a/subcmds/download.py
+++ b/subcmds/download.py
@@ -22,7 +22,7 @@
 
 
 class Download(Command):
-  common = True
+  COMMON = True
   helpSummary = "Download and checkout a change"
   helpUsage = """
 %prog {[project] change[/patchset]}...
diff --git a/subcmds/forall.py b/subcmds/forall.py
index 4a631fb..7c1dea9 100644
--- a/subcmds/forall.py
+++ b/subcmds/forall.py
@@ -41,7 +41,7 @@
 
 
 class Forall(Command, MirrorSafeCommand):
-  common = False
+  COMMON = False
   helpSummary = "Run a shell command in each project"
   helpUsage = """
 %prog [<project>...] -c <command> [<arg>...]
@@ -131,30 +131,30 @@
   def _Options(self, p):
     p.add_option('-r', '--regex',
                  dest='regex', action='store_true',
-                 help="Execute the command only on projects matching regex or wildcard expression")
+                 help='execute the command only on projects matching regex or wildcard expression')
     p.add_option('-i', '--inverse-regex',
                  dest='inverse_regex', action='store_true',
-                 help="Execute the command only on projects not matching regex or "
-                      "wildcard expression")
+                 help='execute the command only on projects not matching regex or '
+                      'wildcard expression')
     p.add_option('-g', '--groups',
                  dest='groups',
-                 help="Execute the command only on projects matching the specified groups")
+                 help='execute the command only on projects matching the specified groups')
     p.add_option('-c', '--command',
-                 help='Command (and arguments) to execute',
+                 help='command (and arguments) to execute',
                  dest='command',
                  action='callback',
                  callback=self._cmd_option)
     p.add_option('-e', '--abort-on-errors',
                  dest='abort_on_errors', action='store_true',
-                 help='Abort if a command exits unsuccessfully')
+                 help='abort if a command exits unsuccessfully')
     p.add_option('--ignore-missing', action='store_true',
-                 help='Silently skip & do not exit non-zero due missing '
+                 help='silently skip & do not exit non-zero due missing '
                       'checkouts')
 
     g = p.get_option_group('--quiet')
     g.add_option('-p',
                  dest='project_header', action='store_true',
-                 help='Show project headers before output')
+                 help='show project headers before output')
     p.add_option('--interactive',
                  action='store_true',
                  help='force interactive usage')
diff --git a/subcmds/gitc_delete.py b/subcmds/gitc_delete.py
index 56e0eab..df74946 100644
--- a/subcmds/gitc_delete.py
+++ b/subcmds/gitc_delete.py
@@ -19,7 +19,7 @@
 
 
 class GitcDelete(Command, GitcClientCommand):
-  common = True
+  COMMON = True
   visible_everywhere = False
   helpSummary = "Delete a GITC Client."
   helpUsage = """
@@ -33,7 +33,7 @@
   def _Options(self, p):
     p.add_option('-f', '--force',
                  dest='force', action='store_true',
-                 help='Force the deletion (no prompt).')
+                 help='force the deletion (no prompt)')
 
   def Execute(self, opt, args):
     if not opt.force:
diff --git a/subcmds/gitc_init.py b/subcmds/gitc_init.py
index 23a4ebb..e705b61 100644
--- a/subcmds/gitc_init.py
+++ b/subcmds/gitc_init.py
@@ -23,7 +23,7 @@
 
 
 class GitcInit(init.Init, GitcAvailableCommand):
-  common = True
+  COMMON = True
   helpSummary = "Initialize a GITC Client."
   helpUsage = """
 %prog [options] [client name]
diff --git a/subcmds/grep.py b/subcmds/grep.py
index 6cb1445..8ac4ba1 100644
--- a/subcmds/grep.py
+++ b/subcmds/grep.py
@@ -29,7 +29,7 @@
 
 
 class Grep(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Print lines matching a pattern"
   helpUsage = """
 %prog {pattern | -e pattern} [<project>...]
diff --git a/subcmds/help.py b/subcmds/help.py
index 6a767e6..1a60ef4 100644
--- a/subcmds/help.py
+++ b/subcmds/help.py
@@ -20,10 +20,11 @@
 from color import Coloring
 from command import PagedCommand, MirrorSafeCommand, GitcAvailableCommand, GitcClientCommand
 import gitc_utils
+from wrapper import Wrapper
 
 
 class Help(PagedCommand, MirrorSafeCommand):
-  common = False
+  COMMON = False
   helpSummary = "Display detailed help on a command"
   helpUsage = """
 %prog [--all|command]
@@ -49,14 +50,21 @@
 
   def _PrintAllCommands(self):
     print('usage: repo COMMAND [ARGS]')
+    self.PrintAllCommandsBody()
+
+  def PrintAllCommandsBody(self):
     print('The complete list of recognized repo commands are:')
     commandNames = list(sorted(all_commands))
     self._PrintCommands(commandNames)
     print("See 'repo help <command>' for more information on a "
           'specific command.')
+    print('Bug reports:', Wrapper().BUG_URL)
 
   def _PrintCommonCommands(self):
     print('usage: repo COMMAND [ARGS]')
+    self.PrintCommonCommandsBody()
+
+  def PrintCommonCommandsBody(self):
     print('The most commonly used repo commands are:')
 
     def gitc_supported(cmd):
@@ -72,12 +80,13 @@
 
     commandNames = list(sorted([name
                                 for name, command in all_commands.items()
-                                if command.common and gitc_supported(command)]))
+                                if command.COMMON and gitc_supported(command)]))
     self._PrintCommands(commandNames)
 
     print(
         "See 'repo help <command>' for more information on a specific command.\n"
         "See 'repo help --all' for a complete list of recognized commands.")
+    print('Bug reports:', Wrapper().BUG_URL)
 
   def _PrintCommandHelp(self, cmd, header_prefix=''):
     class _Out(Coloring):
@@ -136,8 +145,7 @@
 
   def _PrintAllCommandHelp(self):
     for name in sorted(all_commands):
-      cmd = all_commands[name]()
-      cmd.manifest = self.manifest
+      cmd = all_commands[name](manifest=self.manifest)
       self._PrintCommandHelp(cmd, header_prefix='[%s] ' % (name,))
 
   def _Options(self, p):
@@ -161,12 +169,11 @@
       name = args[0]
 
       try:
-        cmd = all_commands[name]()
+        cmd = all_commands[name](manifest=self.manifest)
       except KeyError:
         print("repo: '%s' is not a repo command." % name, file=sys.stderr)
         sys.exit(1)
 
-      cmd.manifest = self.manifest
       self._PrintCommandHelp(cmd)
 
     else:
diff --git a/subcmds/info.py b/subcmds/info.py
index 6381fa8..6c1246e 100644
--- a/subcmds/info.py
+++ b/subcmds/info.py
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import optparse
+
 from command import PagedCommand
 from color import Coloring
 from git_refs import R_M, R_HEADS
@@ -23,9 +25,9 @@
 
 
 class Info(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Get info on the manifest branch, current branch or unmerged branches"
-  helpUsage = "%prog [-dl] [-o [-b]] [<project>...]"
+  helpUsage = "%prog [-dl] [-o [-c]] [<project>...]"
 
   def _Options(self, p):
     p.add_option('-d', '--diff',
@@ -34,12 +36,19 @@
     p.add_option('-o', '--overview',
                  dest='overview', action='store_true',
                  help='show overview of all local commits')
-    p.add_option('-b', '--current-branch',
+    p.add_option('-c', '--current-branch',
                  dest="current_branch", action="store_true",
                  help="consider only checked out branches")
+    p.add_option('--no-current-branch',
+                 dest='current_branch', action='store_false',
+                 help='consider all local branches')
+    # Turn this into a warning & remove this someday.
+    p.add_option('-b',
+                 dest='current_branch', action='store_true',
+                 help=optparse.SUPPRESS_HELP)
     p.add_option('-l', '--local-only',
                  dest="local", action="store_true",
-                 help="Disable all remote operations")
+                 help="disable all remote operations")
 
   def Execute(self, opt, args):
     self.out = _Coloring(self.client.globalConfig)
diff --git a/subcmds/init.py b/subcmds/init.py
index 4182262..9c6b2ad 100644
--- a/subcmds/init.py
+++ b/subcmds/init.py
@@ -12,10 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import optparse
 import os
 import platform
 import re
+import subprocess
 import sys
 import urllib.parse
 
@@ -25,13 +25,14 @@
 from project import SyncBuffer
 from git_config import GitConfig
 from git_command import git_require, MIN_GIT_VERSION_SOFT, MIN_GIT_VERSION_HARD
+import fetch
 import git_superproject
 import platform_utils
 from wrapper import Wrapper
 
 
 class Init(InteractiveCommand, MirrorSafeCommand):
-  common = True
+  COMMON = True
   helpSummary = "Initialize a repo client checkout in the current directory"
   helpUsage = """
 %prog [options] [manifest url]
@@ -54,6 +55,12 @@
 to be used. If no manifest is specified, the manifest default.xml
 will be used.
 
+If the --standalone-manifest argument is set, the manifest will be downloaded
+directly from the specified --manifest-url as a static file (rather than
+setting up a manifest git checkout). With --standalone-manifest, the manifest
+will be fully static and will not be re-downloaded during subsesquent
+`repo init` and `repo sync` calls.
+
 The --reference option can be used to point to a directory that
 has the content of a --mirror sync. This will make the working
 directory use as much data as possible from the local reference
@@ -97,15 +104,38 @@
     """
     superproject = git_superproject.Superproject(self.manifest,
                                                  self.repodir,
+                                                 self.git_event_log,
                                                  quiet=opt.quiet)
-    if not superproject.Sync():
-      print('error: git update of superproject failed', file=sys.stderr)
-      sys.exit(1)
+    sync_result = superproject.Sync()
+    if not sync_result.success:
+      print('warning: git update of superproject failed, repo sync will not '
+            'use superproject to fetch source; while this error is not fatal, '
+            'and you can continue to run repo sync, please run repo init with '
+            'the --no-use-superproject option to stop seeing this warning',
+            file=sys.stderr)
+      if sync_result.fatal and opt.use_superproject is not None:
+        sys.exit(1)
 
   def _SyncManifest(self, opt):
     m = self.manifest.manifestProject
     is_new = not m.Exists
 
+    # If repo has already been initialized, we take -u with the absence of
+    # --standalone-manifest to mean "transition to a standard repo set up",
+    # which necessitates starting fresh.
+    # If --standalone-manifest is set, we always tear everything down and start
+    # anew.
+    if not is_new:
+      was_standalone_manifest = m.config.GetString('manifest.standalone')
+      if opt.standalone_manifest or (
+          was_standalone_manifest and opt.manifest_url):
+        m.config.ClearCache()
+        if m.gitdir and os.path.exists(m.gitdir):
+          platform_utils.rmtree(m.gitdir)
+        if m.worktree and os.path.exists(m.worktree):
+          platform_utils.rmtree(m.worktree)
+
+    is_new = not m.Exists
     if is_new:
       if not opt.manifest_url:
         print('fatal: manifest url is required.', file=sys.stderr)
@@ -130,6 +160,19 @@
 
       m._InitGitDir(mirror_git=mirrored_manifest_git)
 
+    # If standalone_manifest is set, mark the project as "standalone" -- we'll
+    # still do much of the manifests.git set up, but will avoid actual syncs to
+    # a remote.
+    standalone_manifest = False
+    if opt.standalone_manifest:
+      standalone_manifest = True
+    elif not opt.manifest_url:
+      # If -u is set and --standalone-manifest is not, then we're not in
+      # standalone mode. Otherwise, use config to infer what we were in the last
+      # init.
+      standalone_manifest = bool(m.config.GetString('manifest.standalone'))
+    m.config.SetString('manifest.standalone', opt.manifest_url)
+
     self._ConfigureDepth(opt)
 
     # Set the remote URL before the remote branch as we might need it below.
@@ -139,22 +182,23 @@
       r.ResetFetch()
       r.Save()
 
-    if opt.manifest_branch:
-      if opt.manifest_branch == 'HEAD':
-        opt.manifest_branch = m.ResolveRemoteHead()
-        if opt.manifest_branch is None:
-          print('fatal: unable to resolve HEAD', file=sys.stderr)
-          sys.exit(1)
-      m.revisionExpr = opt.manifest_branch
-    else:
-      if is_new:
-        default_branch = m.ResolveRemoteHead()
-        if default_branch is None:
-          # If the remote doesn't have HEAD configured, default to master.
-          default_branch = 'refs/heads/master'
-        m.revisionExpr = default_branch
+    if not standalone_manifest:
+      if opt.manifest_branch:
+        if opt.manifest_branch == 'HEAD':
+          opt.manifest_branch = m.ResolveRemoteHead()
+          if opt.manifest_branch is None:
+            print('fatal: unable to resolve HEAD', file=sys.stderr)
+            sys.exit(1)
+        m.revisionExpr = opt.manifest_branch
       else:
-        m.PreSync()
+        if is_new:
+          default_branch = m.ResolveRemoteHead()
+          if default_branch is None:
+            # If the remote doesn't have HEAD configured, default to master.
+            default_branch = 'refs/heads/master'
+          m.revisionExpr = default_branch
+        else:
+          m.PreSync()
 
     groups = re.split(r'[,\s]+', opt.groups)
     all_platforms = ['linux', 'darwin', 'windows']
@@ -244,6 +288,16 @@
     if opt.use_superproject is not None:
       m.config.SetBoolean('repo.superproject', opt.use_superproject)
 
+    if standalone_manifest:
+      if is_new:
+        manifest_name = 'default.xml'
+        manifest_data = fetch.fetch_file(opt.manifest_url)
+        dest = os.path.join(m.worktree, manifest_name)
+        os.makedirs(os.path.dirname(dest), exist_ok=True)
+        with open(dest, 'wb') as f:
+          f.write(manifest_data)
+      return
+
     if not m.Sync_NetworkHalf(is_new=is_new, quiet=opt.quiet, verbose=opt.verbose,
                               clone_bundle=opt.clone_bundle,
                               current_branch_only=opt.current_branch_only,
@@ -420,6 +474,11 @@
     if opt.archive and opt.mirror:
       self.OptionParser.error('--mirror and --archive cannot be used together.')
 
+    if opt.standalone_manifest and (
+        opt.manifest_branch or opt.manifest_name != 'default.xml'):
+      self.OptionParser.error('--manifest-branch and --manifest-name cannot'
+                              ' be used with --standalone-manifest.')
+
     if args:
       if opt.manifest_url:
         self.OptionParser.error(
diff --git a/subcmds/list.py b/subcmds/list.py
index 5cbc0c2..6adf85b 100644
--- a/subcmds/list.py
+++ b/subcmds/list.py
@@ -12,11 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import os
+
 from command import Command, MirrorSafeCommand
 
 
 class List(Command, MirrorSafeCommand):
-  common = True
+  COMMON = True
   helpSummary = "List projects and their associated directories"
   helpUsage = """
 %prog [-f] [<project>...]
@@ -36,27 +38,33 @@
   def _Options(self, p):
     p.add_option('-r', '--regex',
                  dest='regex', action='store_true',
-                 help="Filter the project list based on regex or wildcard matching of strings")
+                 help='filter the project list based on regex or wildcard matching of strings')
     p.add_option('-g', '--groups',
                  dest='groups',
-                 help="Filter the project list based on the groups the project is in")
+                 help='filter the project list based on the groups the project is in')
     p.add_option('-a', '--all',
                  action='store_true',
-                 help='Show projects regardless of checkout state')
-    p.add_option('-f', '--fullpath',
-                 dest='fullpath', action='store_true',
-                 help="Display the full work tree path instead of the relative path")
+                 help='show projects regardless of checkout state')
     p.add_option('-n', '--name-only',
                  dest='name_only', action='store_true',
-                 help="Display only the name of the repository")
+                 help='display only the name of the repository')
     p.add_option('-p', '--path-only',
                  dest='path_only', action='store_true',
-                 help="Display only the path of the repository")
+                 help='display only the path of the repository')
+    p.add_option('-f', '--fullpath',
+                 dest='fullpath', action='store_true',
+                 help='display the full work tree path instead of the relative path')
+    p.add_option('--relative-to', metavar='PATH',
+                 help='display paths relative to this one (default: top of repo client checkout)')
 
   def ValidateOptions(self, opt, args):
     if opt.fullpath and opt.name_only:
       self.OptionParser.error('cannot combine -f and -n')
 
+    # Resolve any symlinks so the output is stable.
+    if opt.relative_to:
+      opt.relative_to = os.path.realpath(opt.relative_to)
+
   def Execute(self, opt, args):
     """List all projects and the associated directories.
 
@@ -76,6 +84,8 @@
     def _getpath(x):
       if opt.fullpath:
         return x.worktree
+      if opt.relative_to:
+        return os.path.relpath(x.worktree, opt.relative_to)
       return x.relpath
 
     lines = []
diff --git a/subcmds/manifest.py b/subcmds/manifest.py
index e33e683..0fbdeac 100644
--- a/subcmds/manifest.py
+++ b/subcmds/manifest.py
@@ -20,7 +20,7 @@
 
 
 class Manifest(PagedCommand):
-  common = False
+  COMMON = False
   helpSummary = "Manifest inspection utility"
   helpUsage = """
 %prog [-o {-|NAME.xml}] [-m MANIFEST.xml] [-r]
@@ -53,27 +53,29 @@
   def _Options(self, p):
     p.add_option('-r', '--revision-as-HEAD',
                  dest='peg_rev', action='store_true',
-                 help='Save revisions as current HEAD')
+                 help='save revisions as current HEAD')
     p.add_option('-m', '--manifest-name',
                  help='temporary manifest to use for this sync', metavar='NAME.xml')
     p.add_option('--suppress-upstream-revision', dest='peg_rev_upstream',
                  default=True, action='store_false',
-                 help='If in -r mode, do not write the upstream field.  '
-                 'Only of use if the branch names for a sha1 manifest are '
-                 'sensitive.')
+                 help='if in -r mode, do not write the upstream field '
+                 '(only of use if the branch names for a sha1 manifest are '
+                 'sensitive)')
     p.add_option('--suppress-dest-branch', dest='peg_rev_dest_branch',
                  default=True, action='store_false',
-                 help='If in -r mode, do not write the dest-branch field.  '
-                 'Only of use if the branch names for a sha1 manifest are '
-                 'sensitive.')
+                 help='if in -r mode, do not write the dest-branch field '
+                 '(only of use if the branch names for a sha1 manifest are '
+                 'sensitive)')
     p.add_option('--json', default=False, action='store_true',
-                 help='Output manifest in JSON format (experimental).')
+                 help='output manifest in JSON format (experimental)')
     p.add_option('--pretty', default=False, action='store_true',
-                 help='Format output for humans to read.')
+                 help='format output for humans to read')
+    p.add_option('--no-local-manifests', default=False, action='store_true',
+                 dest='ignore_local_manifests', help='ignore local manifests')
     p.add_option('-o', '--output-file',
                  dest='output_file',
                  default='-',
-                 help='File to save the manifest to',
+                 help='file to save the manifest to',
                  metavar='-|NAME.xml')
 
   def _Output(self, opt):
@@ -85,6 +87,9 @@
       fd = sys.stdout
     else:
       fd = open(opt.output_file, 'w')
+
+    self.manifest.SetUseLocalManifests(not opt.ignore_local_manifests)
+
     if opt.json:
       print('warning: --json is experimental!', file=sys.stderr)
       doc = self.manifest.ToDict(peg_rev=opt.peg_rev,
diff --git a/subcmds/overview.py b/subcmds/overview.py
index 004a847..63f5a79 100644
--- a/subcmds/overview.py
+++ b/subcmds/overview.py
@@ -12,12 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import optparse
+
 from color import Coloring
 from command import PagedCommand
 
 
 class Overview(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Display overview of unmerged project branches"
   helpUsage = """
 %prog [--current-branch] [<project>...]
@@ -26,15 +28,22 @@
 The '%prog' command is used to display an overview of the projects branches,
 and list any local commits that have not yet been merged into the project.
 
-The -b/--current-branch option can be used to restrict the output to only
+The -c/--current-branch option can be used to restrict the output to only
 branches currently checked out in each project.  By default, all branches
 are displayed.
 """
 
   def _Options(self, p):
-    p.add_option('-b', '--current-branch',
+    p.add_option('-c', '--current-branch',
                  dest="current_branch", action="store_true",
-                 help="Consider only checked out branches")
+                 help="consider only checked out branches")
+    p.add_option('--no-current-branch',
+                 dest='current_branch', action='store_false',
+                 help='consider all local branches')
+    # Turn this into a warning & remove this someday.
+    p.add_option('-b',
+                 dest='current_branch', action='store_true',
+                 help=optparse.SUPPRESS_HELP)
 
   def Execute(self, opt, args):
     all_branches = []
diff --git a/subcmds/prune.py b/subcmds/prune.py
index 236b647..584ee7e 100644
--- a/subcmds/prune.py
+++ b/subcmds/prune.py
@@ -19,7 +19,7 @@
 
 
 class Prune(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Prune (delete) already merged topics"
   helpUsage = """
 %prog [<project>...]
diff --git a/subcmds/rebase.py b/subcmds/rebase.py
index e0186d4..7c53eb7 100644
--- a/subcmds/rebase.py
+++ b/subcmds/rebase.py
@@ -27,7 +27,7 @@
 
 
 class Rebase(Command):
-  common = True
+  COMMON = True
   helpSummary = "Rebase local branches on upstream branch"
   helpUsage = """
 %prog {[<project>...] | -i <project>...}
@@ -46,27 +46,27 @@
 
     p.add_option('--fail-fast',
                  dest='fail_fast', action='store_true',
-                 help='Stop rebasing after first error is hit')
+                 help='stop rebasing after first error is hit')
     p.add_option('-f', '--force-rebase',
                  dest='force_rebase', action='store_true',
-                 help='Pass --force-rebase to git rebase')
+                 help='pass --force-rebase to git rebase')
     p.add_option('--no-ff',
                  dest='ff', default=True, action='store_false',
-                 help='Pass --no-ff to git rebase')
+                 help='pass --no-ff to git rebase')
     p.add_option('--autosquash',
                  dest='autosquash', action='store_true',
-                 help='Pass --autosquash to git rebase')
+                 help='pass --autosquash to git rebase')
     p.add_option('--whitespace',
                  dest='whitespace', action='store', metavar='WS',
-                 help='Pass --whitespace to git rebase')
+                 help='pass --whitespace to git rebase')
     p.add_option('--auto-stash',
                  dest='auto_stash', action='store_true',
-                 help='Stash local modifications before starting')
+                 help='stash local modifications before starting')
     p.add_option('-m', '--onto-manifest',
                  dest='onto_manifest', action='store_true',
-                 help='Rebase onto the manifest version instead of upstream '
-                      'HEAD.  This helps to make sure the local tree stays '
-                      'consistent if you previously synced to a manifest.')
+                 help='rebase onto the manifest version instead of upstream '
+                      'HEAD (this helps to make sure the local tree stays '
+                      'consistent if you previously synced to a manifest)')
 
   def Execute(self, opt, args):
     all_projects = self.GetProjects(args)
diff --git a/subcmds/selfupdate.py b/subcmds/selfupdate.py
index 388881d..282f518 100644
--- a/subcmds/selfupdate.py
+++ b/subcmds/selfupdate.py
@@ -21,7 +21,7 @@
 
 
 class Selfupdate(Command, MirrorSafeCommand):
-  common = False
+  COMMON = False
   helpSummary = "Update repo to the latest version"
   helpUsage = """
 %prog
diff --git a/subcmds/smartsync.py b/subcmds/smartsync.py
index c7d1d4d..d91d59c 100644
--- a/subcmds/smartsync.py
+++ b/subcmds/smartsync.py
@@ -16,7 +16,7 @@
 
 
 class Smartsync(Sync):
-  common = True
+  COMMON = True
   helpSummary = "Update working tree to the latest known good revision"
   helpUsage = """
 %prog [<project>...]
diff --git a/subcmds/stage.py b/subcmds/stage.py
index ff0f173..0389a4f 100644
--- a/subcmds/stage.py
+++ b/subcmds/stage.py
@@ -28,7 +28,7 @@
 
 
 class Stage(InteractiveCommand):
-  common = True
+  COMMON = True
   helpSummary = "Stage file(s) for commit"
   helpUsage = """
 %prog -i [<project>...]
diff --git a/subcmds/start.py b/subcmds/start.py
index ff2bae5..2addaf2 100644
--- a/subcmds/start.py
+++ b/subcmds/start.py
@@ -25,7 +25,7 @@
 
 
 class Start(Command):
-  common = True
+  COMMON = True
   helpSummary = "Start a new branch for development"
   helpUsage = """
 %prog <newbranchname> [--all | <project>...]
diff --git a/subcmds/status.py b/subcmds/status.py
index 1b48dce..5b66954 100644
--- a/subcmds/status.py
+++ b/subcmds/status.py
@@ -24,7 +24,7 @@
 
 
 class Status(PagedCommand):
-  common = True
+  COMMON = True
   helpSummary = "Show the working tree status"
   helpUsage = """
 %prog [<project>...]
diff --git a/subcmds/sync.py b/subcmds/sync.py
index d41052d..3211cbb 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import errno
 import functools
 import http.cookiejar as cookielib
 import io
@@ -56,6 +57,7 @@
 import platform_utils
 from project import SyncBuffer
 from progress import Progress
+import ssh
 from wrapper import Wrapper
 from manifest_xml import GitcManifest
 
@@ -64,7 +66,7 @@
 
 class Sync(Command, MirrorSafeCommand):
   jobs = 1
-  common = True
+  COMMON = True
   helpSummary = "Update working tree to the latest revision"
   helpUsage = """
 %prog [<project>...]
@@ -168,10 +170,11 @@
   PARALLEL_JOBS = 1
 
   def _CommonOptions(self, p):
-    try:
-      self.PARALLEL_JOBS = self.manifest.default.sync_j
-    except ManifestParseError:
-      pass
+    if self.manifest:
+      try:
+        self.PARALLEL_JOBS = self.manifest.default.sync_j
+      except ManifestParseError:
+        pass
     super()._CommonOptions(p)
 
   def _Options(self, p, show_smart=True):
@@ -212,6 +215,9 @@
     p.add_option('-c', '--current-branch',
                  dest='current_branch_only', action='store_true',
                  help='fetch only current branch from server')
+    p.add_option('--no-current-branch',
+                 dest='current_branch_only', action='store_false',
+                 help='fetch all branches from server')
     p.add_option('-m', '--manifest-name',
                  dest='manifest_name',
                  help='temporary manifest to use for this sync', metavar='NAME.xml')
@@ -230,8 +236,14 @@
                  help='fetch submodules from server')
     p.add_option('--use-superproject', action='store_true',
                  help='use the manifest superproject to sync projects')
+    p.add_option('--no-use-superproject', action='store_false',
+                 dest='use_superproject',
+                 help='disable use of manifest superprojects')
+    p.add_option('--tags',
+                 action='store_false',
+                 help='fetch tags')
     p.add_option('--no-tags',
-                 dest='tags', default=True, action='store_false',
+                 dest='tags', action='store_false',
                  help="don't fetch tags")
     p.add_option('--optimized-fetch',
                  dest='optimized_fetch', action='store_true',
@@ -266,17 +278,11 @@
       branch = branch[len(R_HEADS):]
     return branch
 
-  def _UseSuperproject(self, opt):
-    """Returns True if use-superproject option is enabled"""
-    return (opt.use_superproject or
-            self.manifest.manifestProject.config.GetBoolean(
-                'repo.superproject'))
-
   def _GetCurrentBranchOnly(self, opt):
     """Returns True if current-branch or use-superproject options are enabled."""
-    return opt.current_branch_only or self._UseSuperproject(opt)
+    return opt.current_branch_only or git_superproject.UseSuperproject(opt, self.manifest)
 
-  def _UpdateProjectsRevisionId(self, opt, args):
+  def _UpdateProjectsRevisionId(self, opt, args, load_local_manifests, superproject_logging_data):
     """Update revisionId of every project with the SHA from superproject.
 
     This function updates each project's revisionId with SHA from superproject.
@@ -286,22 +292,40 @@
       opt: Program options returned from optparse.  See _Options().
       args: Arguments to pass to GetProjects. See the GetProjects
           docstring for details.
+      load_local_manifests: Whether to load local manifests.
+      superproject_logging_data: A dictionary of superproject data that is to be logged.
 
     Returns:
-      Returns path to the overriding manifest file.
+      Returns path to the overriding manifest file instead of None.
     """
+    print_messages = git_superproject.PrintMessages(opt, self.manifest)
     superproject = git_superproject.Superproject(self.manifest,
                                                  self.repodir,
-                                                 quiet=opt.quiet)
+                                                 self.git_event_log,
+                                                 quiet=opt.quiet,
+                                                 print_messages=print_messages)
+    if opt.local_only:
+      manifest_path = superproject.manifest_path
+      if manifest_path:
+        self._ReloadManifest(manifest_path, load_local_manifests)
+      return manifest_path
+
     all_projects = self.GetProjects(args,
                                     missing_ok=True,
                                     submodules_ok=opt.fetch_submodules)
-    manifest_path = superproject.UpdateProjectsRevisionId(all_projects)
-    if not manifest_path:
-      print('error: Update of revsionId from superproject has failed',
-            file=sys.stderr)
-      sys.exit(1)
-    self._ReloadManifest(manifest_path)
+    update_result = superproject.UpdateProjectsRevisionId(all_projects)
+    manifest_path = update_result.manifest_path
+    superproject_logging_data['updatedrevisionid'] = bool(manifest_path)
+    if manifest_path:
+      self._ReloadManifest(manifest_path, load_local_manifests)
+    else:
+      if print_messages:
+        print('warning: Update of revisionId from superproject has failed, '
+              'repo sync will not use superproject to fetch the source. ',
+              'Please resync with the --no-use-superproject option to avoid this repo warning.',
+              file=sys.stderr)
+      if update_result.fatal and opt.use_superproject is not None:
+        sys.exit(1)
     return manifest_path
 
   def _FetchProjectList(self, opt, projects):
@@ -343,11 +367,12 @@
           optimized_fetch=opt.optimized_fetch,
           retry_fetches=opt.retry_fetches,
           prune=opt.prune,
+          ssh_proxy=self.ssh_proxy,
           clone_filter=self.manifest.CloneFilter,
           partial_clone_exclude=self.manifest.PartialCloneExclude)
 
       output = buf.getvalue()
-      if opt.verbose and output:
+      if (opt.verbose or not success) and output:
         print('\n' + output.rstrip())
 
       if not success:
@@ -364,7 +389,11 @@
     finish = time.time()
     return (success, project, start, finish)
 
-  def _Fetch(self, projects, opt, err_event):
+  @classmethod
+  def _FetchInitChild(cls, ssh_proxy):
+    cls.ssh_proxy = ssh_proxy
+
+  def _Fetch(self, projects, opt, err_event, ssh_proxy):
     ret = True
 
     jobs = opt.jobs_network if opt.jobs_network else self.jobs
@@ -394,8 +423,14 @@
           break
       return ret
 
+    # We pass the ssh proxy settings via the class.  This allows multiprocessing
+    # to pickle it up when spawning children.  We can't pass it as an argument
+    # to _FetchProjectList below as multiprocessing is unable to pickle those.
+    Sync.ssh_proxy = None
+
     # NB: Multiprocessing is heavy, so don't spin it up for one job.
     if len(projects_list) == 1 or jobs == 1:
+      self._FetchInitChild(ssh_proxy)
       if not _ProcessResults(self._FetchProjectList(opt, x) for x in projects_list):
         ret = False
     else:
@@ -413,7 +448,8 @@
       else:
         pm.update(inc=0, msg='warming up')
         chunksize = 4
-      with multiprocessing.Pool(jobs) as pool:
+      with multiprocessing.Pool(
+          jobs, initializer=self._FetchInitChild, initargs=(ssh_proxy,)) as pool:
         results = pool.imap_unordered(
             functools.partial(self._FetchProjectList, opt),
             projects_list,
@@ -422,6 +458,11 @@
           ret = False
           pool.close()
 
+    # Cleanup the reference now that we're done with it, and we're going to
+    # release any resources it points to.  If we don't, later multiprocessing
+    # usage (e.g. checkouts) will try to pickle and then crash.
+    del Sync.ssh_proxy
+
     pm.end()
     self._fetch_times.Save()
 
@@ -430,6 +471,69 @@
 
     return (ret, fetched)
 
+  def _FetchMain(self, opt, args, all_projects, err_event, manifest_name,
+                 load_local_manifests, ssh_proxy):
+    """The main network fetch loop.
+
+    Args:
+      opt: Program options returned from optparse.  See _Options().
+      args: Command line args used to filter out projects.
+      all_projects: List of all projects that should be fetched.
+      err_event: Whether an error was hit while processing.
+      manifest_name: Manifest file to be reloaded.
+      load_local_manifests: Whether to load local manifests.
+      ssh_proxy: SSH manager for clients & masters.
+
+    Returns:
+      List of all projects that should be checked out.
+    """
+    rp = self.manifest.repoProject
+
+    to_fetch = []
+    now = time.time()
+    if _ONE_DAY_S <= (now - rp.LastFetch):
+      to_fetch.append(rp)
+    to_fetch.extend(all_projects)
+    to_fetch.sort(key=self._fetch_times.Get, reverse=True)
+
+    success, fetched = self._Fetch(to_fetch, opt, err_event, ssh_proxy)
+    if not success:
+      err_event.set()
+
+    _PostRepoFetch(rp, opt.repo_verify)
+    if opt.network_only:
+      # bail out now; the rest touches the working tree
+      if err_event.is_set():
+        print('\nerror: Exited sync due to fetch errors.\n', file=sys.stderr)
+        sys.exit(1)
+      return
+
+    # Iteratively fetch missing and/or nested unregistered submodules
+    previously_missing_set = set()
+    while True:
+      self._ReloadManifest(manifest_name, load_local_manifests)
+      all_projects = self.GetProjects(args,
+                                      missing_ok=True,
+                                      submodules_ok=opt.fetch_submodules)
+      missing = []
+      for project in all_projects:
+        if project.gitdir not in fetched:
+          missing.append(project)
+      if not missing:
+        break
+      # Stop us from non-stopped fetching actually-missing repos: If set of
+      # missing repos has not been changed from last fetch, we break.
+      missing_set = set(p.name for p in missing)
+      if previously_missing_set == missing_set:
+        break
+      previously_missing_set = missing_set
+      success, new_fetched = self._Fetch(missing, opt, err_event, ssh_proxy)
+      if not success:
+        err_event.set()
+      fetched.update(new_fetched)
+
+    return all_projects
+
   def _CheckoutOne(self, detach_head, force_sync, project):
     """Checkout work tree for one project
 
@@ -564,10 +668,18 @@
       t.join()
     pm.end()
 
-  def _ReloadManifest(self, manifest_name=None):
+  def _ReloadManifest(self, manifest_name=None, load_local_manifests=True):
+    """Reload the manfiest from the file specified by the |manifest_name|.
+
+    It unloads the manifest if |manifest_name| is None.
+
+    Args:
+      manifest_name: Manifest file to be reloaded.
+      load_local_manifests: Whether to load local manifests.
+    """
     if manifest_name:
       # Override calls _Unload already
-      self.manifest.Override(manifest_name)
+      self.manifest.Override(manifest_name, load_local_manifests=load_local_manifests)
     else:
       self.manifest._Unload()
 
@@ -614,6 +726,56 @@
       fd.write('\n')
     return 0
 
+  def UpdateCopyLinkfileList(self):
+    """Save all dests of copyfile and linkfile, and update them if needed.
+
+    Returns:
+      Whether update was successful.
+    """
+    new_paths = {}
+    new_linkfile_paths = []
+    new_copyfile_paths = []
+    for project in self.GetProjects(None, missing_ok=True):
+      new_linkfile_paths.extend(x.dest for x in project.linkfiles)
+      new_copyfile_paths.extend(x.dest for x in project.copyfiles)
+
+    new_paths = {
+        'linkfile': new_linkfile_paths,
+        'copyfile': new_copyfile_paths,
+    }
+
+    copylinkfile_name = 'copy-link-files.json'
+    copylinkfile_path = os.path.join(self.manifest.repodir, copylinkfile_name)
+    old_copylinkfile_paths = {}
+
+    if os.path.exists(copylinkfile_path):
+      with open(copylinkfile_path, 'rb') as fp:
+        try:
+          old_copylinkfile_paths = json.load(fp)
+        except:
+          print('error: %s is not a json formatted file.' %
+                copylinkfile_path, file=sys.stderr)
+          platform_utils.remove(copylinkfile_path)
+          return False
+
+      need_remove_files = []
+      need_remove_files.extend(
+          set(old_copylinkfile_paths.get('linkfile', [])) -
+          set(new_linkfile_paths))
+      need_remove_files.extend(
+          set(old_copylinkfile_paths.get('copyfile', [])) -
+          set(new_copyfile_paths))
+
+      for need_remove_file in need_remove_files:
+        # Try to remove the updated copyfile or linkfile.
+        # So, if the file is not exist, nothing need to do.
+        platform_utils.remove(need_remove_file, missing_ok=True)
+
+    # Create copy-link-files.json, save dest path of "copyfile" and "linkfile".
+    with open(copylinkfile_path, 'w', encoding='utf-8') as fp:
+      json.dump(new_paths, fp)
+    return True
+
   def _SmartSyncSetup(self, opt, smart_sync_manifest_path):
     if not self.manifest.manifest_server:
       print('error: cannot smart sync: no manifest server defined in '
@@ -730,7 +892,7 @@
                              start, time.time(), clean)
       if not clean:
         sys.exit(1)
-      self._ReloadManifest(opt.manifest_name)
+      self._ReloadManifest(manifest_name)
       if opt.jobs is None:
         self.jobs = self.manifest.default.sync_j
 
@@ -779,7 +941,7 @@
           print('error: failed to remove existing smart sync override manifest: %s' %
                 e, file=sys.stderr)
 
-    err_event = _threading.Event()
+    err_event = multiprocessing.Event()
 
     rp = self.manifest.repoProject
     rp.PreSync()
@@ -802,8 +964,16 @@
     else:
       self._UpdateManifestProject(opt, mp, manifest_name)
 
-    if self._UseSuperproject(opt):
-      manifest_name = self._UpdateProjectsRevisionId(opt, args)
+    load_local_manifests = not self.manifest.HasLocalManifests
+    use_superproject = git_superproject.UseSuperproject(opt, self.manifest)
+    superproject_logging_data = {
+        'superproject': use_superproject,
+        'haslocalmanifests': bool(self.manifest.HasLocalManifests),
+        'hassuperprojecttag': bool(self.manifest.superproject),
+    }
+    if use_superproject:
+      manifest_name = self._UpdateProjectsRevisionId(
+          opt, args, load_local_manifests, superproject_logging_data) or opt.manifest_name
 
     if self.gitc_manifest:
       gitc_manifest_projects = self.GetProjects(args,
@@ -849,49 +1019,17 @@
 
     self._fetch_times = _FetchTimes(self.manifest)
     if not opt.local_only:
-      to_fetch = []
-      now = time.time()
-      if _ONE_DAY_S <= (now - rp.LastFetch):
-        to_fetch.append(rp)
-      to_fetch.extend(all_projects)
-      to_fetch.sort(key=self._fetch_times.Get, reverse=True)
+      with multiprocessing.Manager() as manager:
+        with ssh.ProxyManager(manager) as ssh_proxy:
+          # Initialize the socket dir once in the parent.
+          ssh_proxy.sock()
+          all_projects = self._FetchMain(opt, args, all_projects, err_event,
+                                         manifest_name, load_local_manifests,
+                                         ssh_proxy)
 
-      success, fetched = self._Fetch(to_fetch, opt, err_event)
-      if not success:
-        err_event.set()
-
-      _PostRepoFetch(rp, opt.repo_verify)
       if opt.network_only:
-        # bail out now; the rest touches the working tree
-        if err_event.is_set():
-          print('\nerror: Exited sync due to fetch errors.\n', file=sys.stderr)
-          sys.exit(1)
         return
 
-      # Iteratively fetch missing and/or nested unregistered submodules
-      previously_missing_set = set()
-      while True:
-        self._ReloadManifest(manifest_name)
-        all_projects = self.GetProjects(args,
-                                        missing_ok=True,
-                                        submodules_ok=opt.fetch_submodules)
-        missing = []
-        for project in all_projects:
-          if project.gitdir not in fetched:
-            missing.append(project)
-        if not missing:
-          break
-        # Stop us from non-stopped fetching actually-missing repos: If set of
-        # missing repos has not been changed from last fetch, we break.
-        missing_set = set(p.name for p in missing)
-        if previously_missing_set == missing_set:
-          break
-        previously_missing_set = missing_set
-        success, new_fetched = self._Fetch(missing, opt, err_event)
-        if not success:
-          err_event.set()
-        fetched.update(new_fetched)
-
       # If we saw an error, exit with code 1 so that other scripts can check.
       if err_event.is_set():
         err_network_sync = True
@@ -914,6 +1052,13 @@
         print('\nerror: Local checkouts *not* updated.', file=sys.stderr)
         sys.exit(1)
 
+    err_update_linkfiles = not self.UpdateCopyLinkfileList()
+    if err_update_linkfiles:
+      err_event.set()
+      if opt.fail_fast:
+        print('\nerror: Local update copyfile or linkfile failed.', file=sys.stderr)
+        sys.exit(1)
+
     err_results = []
     # NB: We don't exit here because this is the last step.
     err_checkout = not self._Checkout(all_projects, opt, err_results)
@@ -932,6 +1077,8 @@
         print('error: Downloading network changes failed.', file=sys.stderr)
       if err_update_projects:
         print('error: Updating local project lists failed.', file=sys.stderr)
+      if err_update_linkfiles:
+        print('error: Updating copyfiles or linkfiles failed.', file=sys.stderr)
       if err_checkout:
         print('error: Checking out local projects failed.', file=sys.stderr)
         if err_results:
@@ -940,6 +1087,15 @@
             file=sys.stderr)
       sys.exit(1)
 
+    # Log the previous sync analysis state from the config.
+    self.git_event_log.LogDataConfigEvents(mp.config.GetSyncAnalysisStateData(),
+                                           'previous_sync_state')
+
+    # Update and log with the new sync analysis state.
+    mp.config.UpdateSyncAnalysisState(opt, superproject_logging_data)
+    self.git_event_log.LogDataConfigEvents(mp.config.GetSyncAnalysisStateData(),
+                                           'current_sync_state')
+
     if not opt.quiet:
       print('repo sync has finished successfully.')
 
@@ -1011,10 +1167,7 @@
         with open(self._path) as f:
           self._times = json.load(f)
       except (IOError, ValueError):
-        try:
-          platform_utils.remove(self._path)
-        except OSError:
-          pass
+        platform_utils.remove(self._path, missing_ok=True)
         self._times = {}
 
   def Save(self):
@@ -1032,10 +1185,7 @@
       with open(self._path, 'w') as f:
         json.dump(self._times, f, indent=2)
     except (IOError, TypeError):
-      try:
-        platform_utils.remove(self._path)
-      except OSError:
-        pass
+      platform_utils.remove(self._path, missing_ok=True)
 
 # This is a replacement for xmlrpc.client.Transport using urllib2
 # and supporting persistent-http[s]. It cannot change hosts from
diff --git a/subcmds/upload.py b/subcmds/upload.py
index 50dccc5..c48deab 100644
--- a/subcmds/upload.py
+++ b/subcmds/upload.py
@@ -13,10 +13,12 @@
 # limitations under the License.
 
 import copy
+import functools
+import optparse
 import re
 import sys
 
-from command import InteractiveCommand
+from command import DEFAULT_LOCAL_JOBS, InteractiveCommand
 from editor import Editor
 from error import UploadError
 from git_command import GitCommand
@@ -53,7 +55,7 @@
 
 
 class Upload(InteractiveCommand):
-  common = True
+  COMMON = True
   helpSummary = "Upload changes for code review"
   helpUsage = """
 %prog [--re --cc] [<project>]...
@@ -145,58 +147,66 @@
 Gerrit Code Review:  https://www.gerritcodereview.com/
 
 """
+  PARALLEL_JOBS = DEFAULT_LOCAL_JOBS
 
   def _Options(self, p):
     p.add_option('-t',
                  dest='auto_topic', action='store_true',
-                 help='Send local branch name to Gerrit Code Review')
+                 help='send local branch name to Gerrit Code Review')
     p.add_option('--hashtag', '--ht',
                  dest='hashtags', action='append', default=[],
-                 help='Add hashtags (comma delimited) to the review.')
+                 help='add hashtags (comma delimited) to the review')
     p.add_option('--hashtag-branch', '--htb',
                  action='store_true',
-                 help='Add local branch name as a hashtag.')
+                 help='add local branch name as a hashtag')
     p.add_option('-l', '--label',
                  dest='labels', action='append', default=[],
-                 help='Add a label when uploading.')
+                 help='add a label when uploading')
     p.add_option('--re', '--reviewers',
                  type='string', action='append', dest='reviewers',
-                 help='Request reviews from these people.')
+                 help='request reviews from these people')
     p.add_option('--cc',
                  type='string', action='append', dest='cc',
-                 help='Also send email to these email addresses.')
-    p.add_option('--br',
+                 help='also send email to these email addresses')
+    p.add_option('--br', '--branch',
                  type='string', action='store', dest='branch',
-                 help='Branch to upload.')
-    p.add_option('--cbr', '--current-branch',
+                 help='(local) branch to upload')
+    p.add_option('-c', '--current-branch',
                  dest='current_branch', action='store_true',
-                 help='Upload current git branch.')
+                 help='upload current git branch')
+    p.add_option('--no-current-branch',
+                 dest='current_branch', action='store_false',
+                 help='upload all git branches')
+    # Turn this into a warning & remove this someday.
+    p.add_option('--cbr',
+                 dest='current_branch', action='store_true',
+                 help=optparse.SUPPRESS_HELP)
     p.add_option('--ne', '--no-emails',
                  action='store_false', dest='notify', default=True,
-                 help='If specified, do not send emails on upload.')
+                 help='do not send e-mails on upload')
     p.add_option('-p', '--private',
                  action='store_true', dest='private', default=False,
-                 help='If specified, upload as a private change.')
+                 help='upload as a private change (deprecated; use --wip)')
     p.add_option('-w', '--wip',
                  action='store_true', dest='wip', default=False,
-                 help='If specified, upload as a work-in-progress change.')
+                 help='upload as a work-in-progress change')
     p.add_option('-o', '--push-option',
                  type='string', action='append', dest='push_options',
                  default=[],
-                 help='Additional push options to transmit')
+                 help='additional push options to transmit')
     p.add_option('-D', '--destination', '--dest',
                  type='string', action='store', dest='dest_branch',
                  metavar='BRANCH',
-                 help='Submit for review on this target branch.')
+                 help='submit for review on this target branch')
     p.add_option('-n', '--dry-run',
                  dest='dryrun', default=False, action='store_true',
-                 help='Do everything except actually upload the CL.')
+                 help='do everything except actually upload the CL')
     p.add_option('-y', '--yes',
                  default=False, action='store_true',
-                 help='Answer yes to all safe prompts.')
+                 help='answer yes to all safe prompts')
     p.add_option('--no-cert-checks',
                  dest='validate_certs', action='store_false', default=True,
-                 help='Disable verifying ssl certs (unsafe).')
+                 help='disable verifying ssl certs (unsafe)')
     RepoHook.AddOptionGroup(p, 'pre-upload')
 
   def _SingleBranch(self, opt, branch, people):
@@ -502,40 +512,46 @@
     merge_branch = p.stdout.strip()
     return merge_branch
 
+  @staticmethod
+  def _GatherOne(opt, project):
+    """Figure out the upload status for |project|."""
+    if opt.current_branch:
+      cbr = project.CurrentBranch
+      up_branch = project.GetUploadableBranch(cbr)
+      avail = [up_branch] if up_branch else None
+    else:
+      avail = project.GetUploadableBranches(opt.branch)
+    return (project, avail)
+
   def Execute(self, opt, args):
-    project_list = self.GetProjects(args)
-    pending = []
-    reviewers = []
-    cc = []
-    branch = None
+    projects = self.GetProjects(args)
 
-    if opt.branch:
-      branch = opt.branch
-
-    for project in project_list:
-      if opt.current_branch:
-        cbr = project.CurrentBranch
-        up_branch = project.GetUploadableBranch(cbr)
-        if up_branch:
-          avail = [up_branch]
-        else:
-          avail = None
-          print('repo: error: Unable to upload branch "%s". '
+    def _ProcessResults(_pool, _out, results):
+      pending = []
+      for result in results:
+        project, avail = result
+        if avail is None:
+          print('repo: error: %s: Unable to upload branch "%s". '
                 'You might be able to fix the branch by running:\n'
                 '  git branch --set-upstream-to m/%s' %
-                (str(cbr), self.manifest.branch),
+                (project.relpath, project.CurrentBranch, self.manifest.branch),
                 file=sys.stderr)
-      else:
-        avail = project.GetUploadableBranches(branch)
-      if avail:
-        pending.append((project, avail))
+        elif avail:
+          pending.append(result)
+      return pending
+
+    pending = self.ExecuteInParallel(
+        opt.jobs,
+        functools.partial(self._GatherOne, opt),
+        projects,
+        callback=_ProcessResults)
 
     if not pending:
-      if branch is None:
+      if opt.branch is None:
         print('repo: error: no branches ready for upload', file=sys.stderr)
       else:
         print('repo: error: no branches named "%s" ready for upload' %
-              (branch,), file=sys.stderr)
+              (opt.branch,), file=sys.stderr)
       return 1
 
     pending_proj_names = [project.name for (project, available) in pending]
@@ -548,10 +564,8 @@
         worktree_list=pending_worktrees):
       return 1
 
-    if opt.reviewers:
-      reviewers = _SplitEmails(opt.reviewers)
-    if opt.cc:
-      cc = _SplitEmails(opt.cc)
+    reviewers = _SplitEmails(opt.reviewers) if opt.reviewers else []
+    cc = _SplitEmails(opt.cc) if opt.cc else []
     people = (reviewers, cc)
 
     if len(pending) == 1 and len(pending[0][1]) == 1:
diff --git a/subcmds/version.py b/subcmds/version.py
index e95a86d..09b053e 100644
--- a/subcmds/version.py
+++ b/subcmds/version.py
@@ -18,13 +18,14 @@
 from command import Command, MirrorSafeCommand
 from git_command import git, RepoSourceVersion, user_agent
 from git_refs import HEAD
+from wrapper import Wrapper
 
 
 class Version(Command, MirrorSafeCommand):
   wrapper_version = None
   wrapper_path = None
 
-  common = False
+  COMMON = False
   helpSummary = "Display the version of repo"
   helpUsage = """
 %prog
@@ -62,3 +63,4 @@
       print('OS %s %s (%s)' % (uname.system, uname.release, uname.version))
       print('CPU %s (%s)' %
             (uname.machine, uname.processor if uname.processor else 'unknown'))
+    print('Bug reports:', Wrapper().BUG_URL)
diff --git a/tests/fixtures/test.gitconfig b/tests/fixtures/test.gitconfig
index 9b3f257..b178cf6 100644
--- a/tests/fixtures/test.gitconfig
+++ b/tests/fixtures/test.gitconfig
@@ -11,3 +11,13 @@
 	intk = 10k
 	intm = 10m
 	intg = 10g
+[repo "syncstate.main"]
+	synctime = 2021-09-14T17:23:43.537338Z
+	version = 1
+[repo "syncstate.sys"]
+	argv = ['/usr/bin/pytest-3']
+[repo "syncstate.superproject"]
+	test = false
+[repo "syncstate.options"]
+	verbose = true
+	mpupdate = false
diff --git a/tests/test_git_command.py b/tests/test_git_command.py
index 912a9db..93300a6 100644
--- a/tests/test_git_command.py
+++ b/tests/test_git_command.py
@@ -26,33 +26,6 @@
 import wrapper
 
 
-class SSHUnitTest(unittest.TestCase):
-  """Tests the ssh functions."""
-
-  def test_ssh_version(self):
-    """Check ssh_version() handling."""
-    ver = git_command._parse_ssh_version('Unknown\n')
-    self.assertEqual(ver, ())
-    ver = git_command._parse_ssh_version('OpenSSH_1.0\n')
-    self.assertEqual(ver, (1, 0))
-    ver = git_command._parse_ssh_version('OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.13, OpenSSL 1.0.1f 6 Jan 2014\n')
-    self.assertEqual(ver, (6, 6, 1))
-    ver = git_command._parse_ssh_version('OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017\n')
-    self.assertEqual(ver, (7, 6))
-
-  def test_ssh_sock(self):
-    """Check ssh_sock() function."""
-    with mock.patch('tempfile.mkdtemp', return_value='/tmp/foo'):
-      # old ssh version uses port
-      with mock.patch('git_command.ssh_version', return_value=(6, 6)):
-        self.assertTrue(git_command.ssh_sock().endswith('%p'))
-      git_command._ssh_sock_path = None
-      # new ssh version uses hash
-      with mock.patch('git_command.ssh_version', return_value=(6, 7)):
-        self.assertTrue(git_command.ssh_sock().endswith('%C'))
-      git_command._ssh_sock_path = None
-
-
 class GitCallUnitTest(unittest.TestCase):
   """Tests the _GitCall class (via git_command.git)."""
 
diff --git a/tests/test_git_config.py b/tests/test_git_config.py
index 3300c12..faf12a2 100644
--- a/tests/test_git_config.py
+++ b/tests/test_git_config.py
@@ -104,6 +104,25 @@
     for key, value in TESTS:
       self.assertEqual(value, self.config.GetInt('section.%s' % (key,)))
 
+  def test_GetSyncAnalysisStateData(self):
+    """Test config entries with a sync state analysis data."""
+    superproject_logging_data = {}
+    superproject_logging_data['test'] = False
+    options = type('options', (object,), {})()
+    options.verbose = 'true'
+    options.mp_update = 'false'
+    TESTS = (
+        ('superproject.test', 'false'),
+        ('options.verbose', 'true'),
+        ('options.mpupdate', 'false'),
+        ('main.version', '1'),
+    )
+    self.config.UpdateSyncAnalysisState(options, superproject_logging_data)
+    sync_data = self.config.GetSyncAnalysisStateData()
+    for key, value in TESTS:
+      self.assertEqual(sync_data[f'{git_config.SYNC_STATE_PREFIX}{key}'], value)
+    self.assertTrue(sync_data[f'{git_config.SYNC_STATE_PREFIX}main.synctime'])
+
 
 class GitConfigReadWriteTests(unittest.TestCase):
   """Read/write tests of the GitConfig class."""
diff --git a/tests/test_git_superproject.py b/tests/test_git_superproject.py
index 9550949..a24fc7f 100644
--- a/tests/test_git_superproject.py
+++ b/tests/test_git_superproject.py
@@ -14,6 +14,7 @@
 
 """Unittests for the git_superproject.py module."""
 
+import json
 import os
 import platform
 import tempfile
@@ -21,13 +22,20 @@
 from unittest import mock
 
 import git_superproject
+import git_trace2_event_log
 import manifest_xml
 import platform_utils
+from test_manifest_xml import sort_attributes
 
 
 class SuperprojectTestCase(unittest.TestCase):
   """TestCase for the Superproject module."""
 
+  PARENT_SID_KEY = 'GIT_TRACE2_PARENT_SID'
+  PARENT_SID_VALUE = 'parent_sid'
+  SELF_SID_REGEX = r'repo-\d+T\d+Z-.*'
+  FULL_SID_REGEX = r'^%s/%s' % (PARENT_SID_VALUE, SELF_SID_REGEX)
+
   def setUp(self):
     """Set up superproject every time."""
     self.tempdir = tempfile.mkdtemp(prefix='repo_tests')
@@ -37,6 +45,13 @@
     os.mkdir(self.repodir)
     self.platform = platform.system().lower()
 
+    # By default we initialize with the expected case where
+    # repo launches us (so GIT_TRACE2_PARENT_SID is set).
+    env = {
+        self.PARENT_SID_KEY: self.PARENT_SID_VALUE,
+    }
+    self.git_event_log = git_trace2_event_log.EventLog(env=env)
+
     # The manifest parsing really wants a git repo currently.
     gitdir = os.path.join(self.repodir, 'manifests.git')
     os.mkdir(gitdir)
@@ -53,7 +68,8 @@
   <project path="art" name="platform/art" groups="notdefault,platform-""" + self.platform + """
   " /></manifest>
 """)
-    self._superproject = git_superproject.Superproject(manifest, self.repodir)
+    self._superproject = git_superproject.Superproject(manifest, self.repodir,
+                                                       self.git_event_log)
 
   def tearDown(self):
     """Tear down superproject every time."""
@@ -65,14 +81,56 @@
       fp.write(data)
     return manifest_xml.XmlManifest(self.repodir, self.manifest_file)
 
+  def verifyCommonKeys(self, log_entry, expected_event_name, full_sid=True):
+    """Helper function to verify common event log keys."""
+    self.assertIn('event', log_entry)
+    self.assertIn('sid', log_entry)
+    self.assertIn('thread', log_entry)
+    self.assertIn('time', log_entry)
+
+    # Do basic data format validation.
+    self.assertEqual(expected_event_name, log_entry['event'])
+    if full_sid:
+      self.assertRegex(log_entry['sid'], self.FULL_SID_REGEX)
+    else:
+      self.assertRegex(log_entry['sid'], self.SELF_SID_REGEX)
+    self.assertRegex(log_entry['time'], r'^\d+-\d+-\d+T\d+:\d+:\d+\.\d+Z$')
+
+  def readLog(self, log_path):
+    """Helper function to read log data into a list."""
+    log_data = []
+    with open(log_path, mode='rb') as f:
+      for line in f:
+        log_data.append(json.loads(line))
+    return log_data
+
+  def verifyErrorEvent(self):
+    """Helper to verify that error event is written."""
+
+    with tempfile.TemporaryDirectory(prefix='event_log_tests') as tempdir:
+      log_path = self.git_event_log.Write(path=tempdir)
+      self.log_data = self.readLog(log_path)
+
+    self.assertEqual(len(self.log_data), 2)
+    error_event = self.log_data[1]
+    self.verifyCommonKeys(self.log_data[0], expected_event_name='version')
+    self.verifyCommonKeys(error_event, expected_event_name='error')
+    # Check for 'error' event specific fields.
+    self.assertIn('msg', error_event)
+    self.assertIn('fmt', error_event)
+
   def test_superproject_get_superproject_no_superproject(self):
     """Test with no url."""
     manifest = self.getXmlManifest("""
 <manifest>
 </manifest>
 """)
-    superproject = git_superproject.Superproject(manifest, self.repodir)
-    self.assertFalse(superproject.Sync())
+    superproject = git_superproject.Superproject(manifest, self.repodir, self.git_event_log)
+    # Test that exit condition is false when there is no superproject tag.
+    sync_result = superproject.Sync()
+    self.assertFalse(sync_result.success)
+    self.assertFalse(sync_result.fatal)
+    self.verifyErrorEvent()
 
   def test_superproject_get_superproject_invalid_url(self):
     """Test with an invalid url."""
@@ -83,8 +141,10 @@
   <superproject name="superproject"/>
 </manifest>
 """)
-    superproject = git_superproject.Superproject(manifest, self.repodir)
-    self.assertFalse(superproject.Sync())
+    superproject = git_superproject.Superproject(manifest, self.repodir, self.git_event_log)
+    sync_result = superproject.Sync()
+    self.assertFalse(sync_result.success)
+    self.assertTrue(sync_result.fatal)
 
   def test_superproject_get_superproject_invalid_branch(self):
     """Test with an invalid branch."""
@@ -95,21 +155,28 @@
   <superproject name="superproject"/>
 </manifest>
 """)
-    superproject = git_superproject.Superproject(manifest, self.repodir)
-    with mock.patch.object(self._superproject, '_GetBranch', return_value='junk'):
-      self.assertFalse(superproject.Sync())
+    self._superproject = git_superproject.Superproject(manifest, self.repodir,
+                                                       self.git_event_log)
+    with mock.patch.object(self._superproject, '_branch', 'junk'):
+      sync_result = self._superproject.Sync()
+      self.assertFalse(sync_result.success)
+      self.assertTrue(sync_result.fatal)
 
   def test_superproject_get_superproject_mock_init(self):
     """Test with _Init failing."""
     with mock.patch.object(self._superproject, '_Init', return_value=False):
-      self.assertFalse(self._superproject.Sync())
+      sync_result = self._superproject.Sync()
+      self.assertFalse(sync_result.success)
+      self.assertTrue(sync_result.fatal)
 
   def test_superproject_get_superproject_mock_fetch(self):
     """Test with _Fetch failing."""
     with mock.patch.object(self._superproject, '_Init', return_value=True):
       os.mkdir(self._superproject._superproject_path)
       with mock.patch.object(self._superproject, '_Fetch', return_value=False):
-        self.assertFalse(self._superproject.Sync())
+        sync_result = self._superproject.Sync()
+        self.assertFalse(sync_result.success)
+        self.assertTrue(sync_result.fatal)
 
   def test_superproject_get_all_project_commit_ids_mock_ls_tree(self):
     """Test with LsTree being a mock."""
@@ -121,12 +188,13 @@
     with mock.patch.object(self._superproject, '_Init', return_value=True):
       with mock.patch.object(self._superproject, '_Fetch', return_value=True):
         with mock.patch.object(self._superproject, '_LsTree', return_value=data):
-          commit_ids = self._superproject._GetAllProjectsCommitIds()
-          self.assertEqual(commit_ids, {
+          commit_ids_result = self._superproject._GetAllProjectsCommitIds()
+          self.assertEqual(commit_ids_result.commit_ids, {
               'art': '2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea',
               'bootable/recovery': 'e9d25da64d8d365dbba7c8ee00fe8c4473fe9a06',
               'build/bazel': 'ade9b7a0d874e25fff4bf2552488825c6f111928'
           })
+          self.assertFalse(commit_ids_result.fatal)
 
   def test_superproject_write_manifest_file(self):
     """Test with writing manifest to a file after setting revisionId."""
@@ -135,18 +203,18 @@
     project.SetRevisionId('ABCDEF')
     # Create temporary directory so that it can write the file.
     os.mkdir(self._superproject._superproject_path)
-    manifest_path = self._superproject._WriteManfiestFile()
+    manifest_path = self._superproject._WriteManifestFile()
     self.assertIsNotNone(manifest_path)
     with open(manifest_path, 'r') as fp:
-      manifest_xml = fp.read()
+      manifest_xml_data = fp.read()
     self.assertEqual(
-        manifest_xml,
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="default-remote" fetch="http://localhost"/>' +
-        '<default remote="default-remote" revision="refs/heads/main"/>' +
-        '<project name="platform/art" path="art" revision="ABCDEF" ' +
-        'groups="notdefault,platform-' + self.platform + '"/>' +
-        '<superproject name="superproject"/>' +
+        sort_attributes(manifest_xml_data),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="default-remote"/>'
+        '<default remote="default-remote" revision="refs/heads/main"/>'
+        '<project groups="notdefault,platform-' + self.platform + '" '
+        'name="platform/art" path="art" revision="ABCDEF" upstream="refs/heads/main"/>'
+        '<superproject name="superproject"/>'
         '</manifest>')
 
   def test_superproject_update_project_revision_id(self):
@@ -162,19 +230,145 @@
                                return_value=data):
           # Create temporary directory so that it can write the file.
           os.mkdir(self._superproject._superproject_path)
-          manifest_path = self._superproject.UpdateProjectsRevisionId(projects)
-          self.assertIsNotNone(manifest_path)
-          with open(manifest_path, 'r') as fp:
-            manifest_xml = fp.read()
+          update_result = self._superproject.UpdateProjectsRevisionId(projects)
+          self.assertIsNotNone(update_result.manifest_path)
+          self.assertFalse(update_result.fatal)
+          with open(update_result.manifest_path, 'r') as fp:
+            manifest_xml_data = fp.read()
           self.assertEqual(
-              manifest_xml,
-              '<?xml version="1.0" ?><manifest>' +
-              '<remote name="default-remote" fetch="http://localhost"/>' +
-              '<default remote="default-remote" revision="refs/heads/main"/>' +
-              '<project name="platform/art" path="art" ' +
-              'revision="2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea" ' +
-              'groups="notdefault,platform-' + self.platform + '"/>' +
-              '<superproject name="superproject"/>' +
+              sort_attributes(manifest_xml_data),
+              '<?xml version="1.0" ?><manifest>'
+              '<remote fetch="http://localhost" name="default-remote"/>'
+              '<default remote="default-remote" revision="refs/heads/main"/>'
+              '<project groups="notdefault,platform-' + self.platform + '" '
+              'name="platform/art" path="art" '
+              'revision="2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea" upstream="refs/heads/main"/>'
+              '<superproject name="superproject"/>'
+              '</manifest>')
+
+  def test_superproject_update_project_revision_id_no_superproject_tag(self):
+    """Test update of commit ids of a manifest without superproject tag."""
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="test-name"/>
+</manifest>
+""")
+    self.maxDiff = None
+    self._superproject = git_superproject.Superproject(manifest, self.repodir,
+                                                       self.git_event_log)
+    self.assertEqual(len(self._superproject._manifest.projects), 1)
+    projects = self._superproject._manifest.projects
+    project = projects[0]
+    project.SetRevisionId('ABCDEF')
+    update_result = self._superproject.UpdateProjectsRevisionId(projects)
+    self.assertIsNone(update_result.manifest_path)
+    self.assertFalse(update_result.fatal)
+    self.verifyErrorEvent()
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="default-remote"/>'
+        '<default remote="default-remote" revision="refs/heads/main"/>'
+        '<project name="test-name" revision="ABCDEF" upstream="refs/heads/main"/>'
+        '</manifest>')
+
+  def test_superproject_update_project_revision_id_from_local_manifest_group(self):
+    """Test update of commit ids of a manifest that have local manifest no superproject group."""
+    local_group = manifest_xml.LOCAL_MANIFEST_GROUP_PREFIX + ':local'
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <remote name="goog" fetch="http://localhost2" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <superproject name="superproject"/>
+  <project path="vendor/x" name="platform/vendor/x" remote="goog"
+           groups=\"""" + local_group + """
+         " revision="master-with-vendor" clone-depth="1" />
+  <project path="art" name="platform/art" groups="notdefault,platform-""" + self.platform + """
+  " /></manifest>
+""")
+    self.maxDiff = None
+    self._superproject = git_superproject.Superproject(manifest, self.repodir,
+                                                       self.git_event_log)
+    self.assertEqual(len(self._superproject._manifest.projects), 2)
+    projects = self._superproject._manifest.projects
+    data = ('160000 commit 2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea\tart\x00')
+    with mock.patch.object(self._superproject, '_Init', return_value=True):
+      with mock.patch.object(self._superproject, '_Fetch', return_value=True):
+        with mock.patch.object(self._superproject,
+                               '_LsTree',
+                               return_value=data):
+          # Create temporary directory so that it can write the file.
+          os.mkdir(self._superproject._superproject_path)
+          update_result = self._superproject.UpdateProjectsRevisionId(projects)
+          self.assertIsNotNone(update_result.manifest_path)
+          self.assertFalse(update_result.fatal)
+          with open(update_result.manifest_path, 'r') as fp:
+            manifest_xml_data = fp.read()
+          # Verify platform/vendor/x's project revision hasn't changed.
+          self.assertEqual(
+              sort_attributes(manifest_xml_data),
+              '<?xml version="1.0" ?><manifest>'
+              '<remote fetch="http://localhost" name="default-remote"/>'
+              '<remote fetch="http://localhost2" name="goog"/>'
+              '<default remote="default-remote" revision="refs/heads/main"/>'
+              '<project groups="notdefault,platform-' + self.platform + '" '
+              'name="platform/art" path="art" '
+              'revision="2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea" upstream="refs/heads/main"/>'
+              '<project clone-depth="1" groups="' + local_group + '" '
+              'name="platform/vendor/x" path="vendor/x" remote="goog" '
+              'revision="master-with-vendor"/>'
+              '<superproject name="superproject"/>'
+              '</manifest>')
+
+  def test_superproject_update_project_revision_id_with_pinned_manifest(self):
+    """Test update of commit ids of a pinned manifest."""
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <superproject name="superproject"/>
+  <project path="vendor/x" name="platform/vendor/x" revision="" />
+  <project path="vendor/y" name="platform/vendor/y"
+           revision="52d3c9f7c107839ece2319d077de0cd922aa9d8f" />
+  <project path="art" name="platform/art" groups="notdefault,platform-""" + self.platform + """
+  " /></manifest>
+""")
+    self.maxDiff = None
+    self._superproject = git_superproject.Superproject(manifest, self.repodir,
+                                                       self.git_event_log)
+    self.assertEqual(len(self._superproject._manifest.projects), 3)
+    projects = self._superproject._manifest.projects
+    data = ('160000 commit 2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea\tart\x00'
+            '160000 commit e9d25da64d8d365dbba7c8ee00fe8c4473fe9a06\tvendor/x\x00')
+    with mock.patch.object(self._superproject, '_Init', return_value=True):
+      with mock.patch.object(self._superproject, '_Fetch', return_value=True):
+        with mock.patch.object(self._superproject,
+                               '_LsTree',
+                               return_value=data):
+          # Create temporary directory so that it can write the file.
+          os.mkdir(self._superproject._superproject_path)
+          update_result = self._superproject.UpdateProjectsRevisionId(projects)
+          self.assertIsNotNone(update_result.manifest_path)
+          self.assertFalse(update_result.fatal)
+          with open(update_result.manifest_path, 'r') as fp:
+            manifest_xml_data = fp.read()
+          # Verify platform/vendor/x's project revision hasn't changed.
+          self.assertEqual(
+              sort_attributes(manifest_xml_data),
+              '<?xml version="1.0" ?><manifest>'
+              '<remote fetch="http://localhost" name="default-remote"/>'
+              '<default remote="default-remote" revision="refs/heads/main"/>'
+              '<project groups="notdefault,platform-' + self.platform + '" '
+              'name="platform/art" path="art" '
+              'revision="2c2724cb36cd5a9cec6c852c681efc3b7c6b86ea" upstream="refs/heads/main"/>'
+              '<project name="platform/vendor/x" path="vendor/x" '
+              'revision="e9d25da64d8d365dbba7c8ee00fe8c4473fe9a06" upstream="refs/heads/main"/>'
+              '<project name="platform/vendor/y" path="vendor/y" '
+              'revision="52d3c9f7c107839ece2319d077de0cd922aa9d8f"/>'
+              '<superproject name="superproject"/>'
               '</manifest>')
 
 
diff --git a/tests/test_git_trace2_event_log.py b/tests/test_git_trace2_event_log.py
index 4a3a4c4..89dcfb9 100644
--- a/tests/test_git_trace2_event_log.py
+++ b/tests/test_git_trace2_event_log.py
@@ -42,7 +42,7 @@
     self._event_log_module = git_trace2_event_log.EventLog(env=env)
     self._log_data = None
 
-  def verifyCommonKeys(self, log_entry, expected_event_name, full_sid=True):
+  def verifyCommonKeys(self, log_entry, expected_event_name=None, full_sid=True):
     """Helper function to verify common event log keys."""
     self.assertIn('event', log_entry)
     self.assertIn('sid', log_entry)
@@ -50,7 +50,8 @@
     self.assertIn('time', log_entry)
 
     # Do basic data format validation.
-    self.assertEqual(expected_event_name, log_entry['event'])
+    if expected_event_name:
+      self.assertEqual(expected_event_name, log_entry['event'])
     if full_sid:
       self.assertRegex(log_entry['sid'], self.FULL_SID_REGEX)
     else:
@@ -65,6 +66,13 @@
         log_data.append(json.loads(line))
     return log_data
 
+  def remove_prefix(self, s, prefix):
+    """Return a copy string after removing |prefix| from |s|, if present or the original string."""
+    if s.startswith(prefix):
+        return s[len(prefix):]
+    else:
+        return s
+
   def test_initial_state_with_parent_sid(self):
     """Test initial state when 'GIT_TRACE2_PARENT_SID' is set by parent."""
     self.assertRegex(self._event_log_module.full_sid, self.FULL_SID_REGEX)
@@ -234,6 +242,66 @@
     self.assertEqual(len(self._log_data), 1)
     self.verifyCommonKeys(self._log_data[0], expected_event_name='version')
 
+  def test_data_event_config(self):
+    """Test 'data' event data outputs all config keys.
+
+    Expected event log:
+    <version event>
+    <data event>
+    <data event>
+    """
+    config = {
+        'git.foo': 'bar',
+        'repo.partialclone': 'false',
+        'repo.syncstate.superproject.hassuperprojecttag': 'true',
+        'repo.syncstate.superproject.sys.argv': ['--', 'sync', 'protobuf'],
+    }
+    prefix_value = 'prefix'
+    self._event_log_module.LogDataConfigEvents(config, prefix_value)
+
+    with tempfile.TemporaryDirectory(prefix='event_log_tests') as tempdir:
+      log_path = self._event_log_module.Write(path=tempdir)
+      self._log_data = self.readLog(log_path)
+
+    self.assertEqual(len(self._log_data), 5)
+    data_events = self._log_data[1:]
+    self.verifyCommonKeys(self._log_data[0], expected_event_name='version')
+
+    for event in data_events:
+      self.verifyCommonKeys(event)
+      # Check for 'data' event specific fields.
+      self.assertIn('key', event)
+      self.assertIn('value', event)
+      key = event['key']
+      key = self.remove_prefix(key, f'{prefix_value}/')
+      value = event['value']
+      self.assertEqual(self._event_log_module.GetDataEventName(value), event['event'])
+      self.assertTrue(key in config and value == config[key])
+
+  def test_error_event(self):
+    """Test and validate 'error' event data is valid.
+
+    Expected event log:
+    <version event>
+    <error event>
+    """
+    msg = 'invalid option: --cahced'
+    fmt = 'invalid option: %s'
+    self._event_log_module.ErrorEvent(msg, fmt)
+    with tempfile.TemporaryDirectory(prefix='event_log_tests') as tempdir:
+      log_path = self._event_log_module.Write(path=tempdir)
+      self._log_data = self.readLog(log_path)
+
+    self.assertEqual(len(self._log_data), 2)
+    error_event = self._log_data[1]
+    self.verifyCommonKeys(self._log_data[0], expected_event_name='version')
+    self.verifyCommonKeys(error_event, expected_event_name='error')
+    # Check for 'error' event specific fields.
+    self.assertIn('msg', error_event)
+    self.assertIn('fmt', error_event)
+    self.assertEqual(error_event['msg'], msg)
+    self.assertEqual(error_event['fmt'], fmt)
+
   def test_write_with_filename(self):
     """Test Write() with a path to a file exits with None."""
     self.assertIsNone(self._event_log_module.Write(path='path/to/file'))
diff --git a/tests/test_manifest_xml.py b/tests/test_manifest_xml.py
index eda0696..cb3eb85 100644
--- a/tests/test_manifest_xml.py
+++ b/tests/test_manifest_xml.py
@@ -16,6 +16,7 @@
 
 import os
 import platform
+import re
 import shutil
 import tempfile
 import unittest
@@ -52,6 +53,9 @@
     'blah/foo~',
     # Block Unicode characters that get normalized out by filesystems.
     u'foo\u200Cbar',
+    # Block newlines.
+    'f\n/bar',
+    'f\r/bar',
 )
 
 # Make sure platforms that use path separators (e.g. Windows) are also
@@ -60,6 +64,30 @@
   INVALID_FS_PATHS += tuple(x.replace('/', os.path.sep) for x in INVALID_FS_PATHS)
 
 
+def sort_attributes(manifest):
+  """Sort the attributes of all elements alphabetically.
+
+  This is needed because different versions of the toxml() function from
+  xml.dom.minidom outputs the attributes of elements in different orders.
+  Before Python 3.8 they were output alphabetically, later versions preserve
+  the order specified by the user.
+
+  Args:
+    manifest: String containing an XML manifest.
+
+  Returns:
+    The XML manifest with the attributes of all elements sorted alphabetically.
+  """
+  new_manifest = ''
+  # This will find every element in the XML manifest, whether they have
+  # attributes or not. This simplifies recreating the manifest below.
+  matches = re.findall(r'(<[/?]?[a-z-]+\s*)((?:\S+?="[^"]+"\s*?)*)(\s*[/?]?>)', manifest)
+  for head, attrs, tail in matches:
+    m = re.findall(r'\S+?="[^"]+"', attrs)
+    new_manifest += head + ' '.join(sorted(m)) + tail
+  return new_manifest
+
+
 class ManifestParseTestCase(unittest.TestCase):
   """TestCase for parsing manifests."""
 
@@ -91,6 +119,11 @@
       fp.write(data)
     return manifest_xml.XmlManifest(self.repodir, self.manifest_file)
 
+  @staticmethod
+  def encodeXmlAttr(attr):
+    """Encode |attr| using XML escape rules."""
+    return attr.replace('\r', '&#x000d;').replace('\n', '&#x000a;')
+
 
 class ManifestValidateFilePaths(unittest.TestCase):
   """Check _ValidateFilePaths helper.
@@ -232,6 +265,19 @@
     self.assertEqual(manifest.repo_hooks_project.name, 'repohooks')
     self.assertEqual(manifest.repo_hooks_project.enabled_repo_hooks, ['a', 'b'])
 
+  def test_repo_hooks_unordered(self):
+    """Check repo-hooks settings work even if the project def comes second."""
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="test-remote" fetch="http://localhost" />
+  <default remote="test-remote" revision="refs/heads/main" />
+  <repo-hooks in-project="repohooks" enabled-list="a, b"/>
+  <project name="repohooks" path="src/repohooks"/>
+</manifest>
+""")
+    self.assertEqual(manifest.repo_hooks_project.name, 'repohooks')
+    self.assertEqual(manifest.repo_hooks_project.enabled_repo_hooks, ['a', 'b'])
+
   def test_unknown_tags(self):
     """Check superproject settings."""
     manifest = self.getXmlManifest("""
@@ -246,11 +292,30 @@
     self.assertEqual(manifest.superproject['name'], 'superproject')
     self.assertEqual(manifest.superproject['remote'].name, 'test-remote')
     self.assertEqual(
-        manifest.ToXml().toxml(),
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="test-remote" fetch="http://localhost"/>' +
-        '<default remote="test-remote" revision="refs/heads/main"/>' +
-        '<superproject name="superproject"/>' +
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote"/>'
+        '<default remote="test-remote" revision="refs/heads/main"/>'
+        '<superproject name="superproject"/>'
+        '</manifest>')
+
+  def test_remote_annotations(self):
+    """Check remote settings."""
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="test-remote" fetch="http://localhost">
+    <annotation name="foo" value="bar"/>
+  </remote>
+</manifest>
+""")
+    self.assertEqual(manifest.remotes['test-remote'].annotations[0].name, 'foo')
+    self.assertEqual(manifest.remotes['test-remote'].annotations[0].value, 'bar')
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote">'
+        '<annotation name="foo" value="bar"/>'
+        '</remote>'
         '</manifest>')
 
 
@@ -303,6 +368,7 @@
   def test_allow_bad_name_from_user(self):
     """Check handling of bad name attribute from the user's input."""
     def parse(name):
+      name = self.encodeXmlAttr(name)
       manifest = self.getXmlManifest(f"""
 <manifest>
   <remote name="default-remote" fetch="http://localhost" />
@@ -327,6 +393,7 @@
   def test_bad_name_checks(self):
     """Check handling of bad name attribute."""
     def parse(name):
+      name = self.encodeXmlAttr(name)
       # Setup target of the include.
       with open(os.path.join(self.manifest_dir, 'target.xml'), 'w') as fp:
         fp.write(f'<manifest><include name="{name}"/></manifest>')
@@ -398,16 +465,18 @@
     project = manifest.projects[0]
     project.SetRevisionId('ABCDEF')
     self.assertEqual(
-        manifest.ToXml().toxml(),
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="default-remote" fetch="http://localhost"/>' +
-        '<default remote="default-remote" revision="refs/heads/main"/>' +
-        '<project name="test-name" revision="ABCDEF"/>' +
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="default-remote"/>'
+        '<default remote="default-remote" revision="refs/heads/main"/>'
+        '<project name="test-name" revision="ABCDEF" upstream="refs/heads/main"/>'
         '</manifest>')
 
   def test_trailing_slash(self):
     """Check handling of trailing slashes in attributes."""
     def parse(name, path):
+      name = self.encodeXmlAttr(name)
+      path = self.encodeXmlAttr(path)
       return self.getXmlManifest(f"""
 <manifest>
   <remote name="default-remote" fetch="http://localhost" />
@@ -437,6 +506,8 @@
   def test_toplevel_path(self):
     """Check handling of path=. specially."""
     def parse(name, path):
+      name = self.encodeXmlAttr(name)
+      path = self.encodeXmlAttr(path)
       return self.getXmlManifest(f"""
 <manifest>
   <remote name="default-remote" fetch="http://localhost" />
@@ -453,6 +524,8 @@
   def test_bad_path_name_checks(self):
     """Check handling of bad path & name attributes."""
     def parse(name, path):
+      name = self.encodeXmlAttr(name)
+      path = self.encodeXmlAttr(path)
       manifest = self.getXmlManifest(f"""
 <manifest>
   <remote name="default-remote" fetch="http://localhost" />
@@ -499,12 +572,79 @@
     self.assertEqual(manifest.superproject['name'], 'superproject')
     self.assertEqual(manifest.superproject['remote'].name, 'test-remote')
     self.assertEqual(manifest.superproject['remote'].url, 'http://localhost/superproject')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/main')
     self.assertEqual(
-        manifest.ToXml().toxml(),
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="test-remote" fetch="http://localhost"/>' +
-        '<default remote="test-remote" revision="refs/heads/main"/>' +
-        '<superproject name="superproject"/>' +
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote"/>'
+        '<default remote="test-remote" revision="refs/heads/main"/>'
+        '<superproject name="superproject"/>'
+        '</manifest>')
+
+  def test_superproject_revision(self):
+    """Check superproject settings with a different revision attribute"""
+    self.maxDiff = None
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="test-remote" fetch="http://localhost" />
+  <default remote="test-remote" revision="refs/heads/main" />
+  <superproject name="superproject" revision="refs/heads/stable" />
+</manifest>
+""")
+    self.assertEqual(manifest.superproject['name'], 'superproject')
+    self.assertEqual(manifest.superproject['remote'].name, 'test-remote')
+    self.assertEqual(manifest.superproject['remote'].url, 'http://localhost/superproject')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/stable')
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote"/>'
+        '<default remote="test-remote" revision="refs/heads/main"/>'
+        '<superproject name="superproject" revision="refs/heads/stable"/>'
+        '</manifest>')
+
+  def test_superproject_revision_default_negative(self):
+    """Check superproject settings with a same revision attribute"""
+    self.maxDiff = None
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="test-remote" fetch="http://localhost" />
+  <default remote="test-remote" revision="refs/heads/stable" />
+  <superproject name="superproject" revision="refs/heads/stable" />
+</manifest>
+""")
+    self.assertEqual(manifest.superproject['name'], 'superproject')
+    self.assertEqual(manifest.superproject['remote'].name, 'test-remote')
+    self.assertEqual(manifest.superproject['remote'].url, 'http://localhost/superproject')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/stable')
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote"/>'
+        '<default remote="test-remote" revision="refs/heads/stable"/>'
+        '<superproject name="superproject"/>'
+        '</manifest>')
+
+  def test_superproject_revision_remote(self):
+    """Check superproject settings with a same revision attribute"""
+    self.maxDiff = None
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="test-remote" fetch="http://localhost" revision="refs/heads/main" />
+  <default remote="test-remote" />
+  <superproject name="superproject" revision="refs/heads/stable" />
+</manifest>
+""")
+    self.assertEqual(manifest.superproject['name'], 'superproject')
+    self.assertEqual(manifest.superproject['remote'].name, 'test-remote')
+    self.assertEqual(manifest.superproject['remote'].url, 'http://localhost/superproject')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/stable')
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="test-remote" revision="refs/heads/main"/>'
+        '<default remote="test-remote"/>'
+        '<superproject name="superproject" revision="refs/heads/stable"/>'
         '</manifest>')
 
   def test_remote(self):
@@ -520,13 +660,14 @@
     self.assertEqual(manifest.superproject['name'], 'platform/superproject')
     self.assertEqual(manifest.superproject['remote'].name, 'superproject-remote')
     self.assertEqual(manifest.superproject['remote'].url, 'http://localhost/platform/superproject')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/main')
     self.assertEqual(
-        manifest.ToXml().toxml(),
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="default-remote" fetch="http://localhost"/>' +
-        '<remote name="superproject-remote" fetch="http://localhost"/>' +
-        '<default remote="default-remote" revision="refs/heads/main"/>' +
-        '<superproject name="platform/superproject" remote="superproject-remote"/>' +
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="default-remote"/>'
+        '<remote fetch="http://localhost" name="superproject-remote"/>'
+        '<default remote="default-remote" revision="refs/heads/main"/>'
+        '<superproject name="platform/superproject" remote="superproject-remote"/>'
         '</manifest>')
 
   def test_defalut_remote(self):
@@ -540,10 +681,165 @@
 """)
     self.assertEqual(manifest.superproject['name'], 'superproject')
     self.assertEqual(manifest.superproject['remote'].name, 'default-remote')
+    self.assertEqual(manifest.superproject['revision'], 'refs/heads/main')
+    self.assertEqual(
+        sort_attributes(manifest.ToXml().toxml()),
+        '<?xml version="1.0" ?><manifest>'
+        '<remote fetch="http://localhost" name="default-remote"/>'
+        '<default remote="default-remote" revision="refs/heads/main"/>'
+        '<superproject name="superproject"/>'
+        '</manifest>')
+
+
+class ContactinfoElementTests(ManifestParseTestCase):
+  """Tests for <contactinfo>."""
+
+  def test_contactinfo(self):
+    """Check contactinfo settings."""
+    bugurl = 'http://localhost/contactinfo'
+    manifest = self.getXmlManifest(f"""
+<manifest>
+  <contactinfo bugurl="{bugurl}"/>
+</manifest>
+""")
+    self.assertEqual(manifest.contactinfo.bugurl, bugurl)
     self.assertEqual(
         manifest.ToXml().toxml(),
-        '<?xml version="1.0" ?><manifest>' +
-        '<remote name="default-remote" fetch="http://localhost"/>' +
-        '<default remote="default-remote" revision="refs/heads/main"/>' +
-        '<superproject name="superproject"/>' +
+        '<?xml version="1.0" ?><manifest>'
+        f'<contactinfo bugurl="{bugurl}"/>'
         '</manifest>')
+
+
+class DefaultElementTests(ManifestParseTestCase):
+  """Tests for <default>."""
+
+  def test_default(self):
+    """Check default settings."""
+    a = manifest_xml._Default()
+    a.revisionExpr = 'foo'
+    a.remote = manifest_xml._XmlRemote(name='remote')
+    b = manifest_xml._Default()
+    b.revisionExpr = 'bar'
+    self.assertEqual(a, a)
+    self.assertNotEqual(a, b)
+    self.assertNotEqual(b, a.remote)
+    self.assertNotEqual(a, 123)
+    self.assertNotEqual(a, None)
+
+
+class RemoteElementTests(ManifestParseTestCase):
+  """Tests for <remote>."""
+
+  def test_remote(self):
+    """Check remote settings."""
+    a = manifest_xml._XmlRemote(name='foo')
+    a.AddAnnotation('key1', 'value1', 'true')
+    b = manifest_xml._XmlRemote(name='foo')
+    b.AddAnnotation('key2', 'value1', 'true')
+    c = manifest_xml._XmlRemote(name='foo')
+    c.AddAnnotation('key1', 'value2', 'true')
+    d = manifest_xml._XmlRemote(name='foo')
+    d.AddAnnotation('key1', 'value1', 'false')
+    self.assertEqual(a, a)
+    self.assertNotEqual(a, b)
+    self.assertNotEqual(a, c)
+    self.assertNotEqual(a, d)
+    self.assertNotEqual(a, manifest_xml._Default())
+    self.assertNotEqual(a, 123)
+    self.assertNotEqual(a, None)
+
+
+class RemoveProjectElementTests(ManifestParseTestCase):
+  """Tests for <remove-project>."""
+
+  def test_remove_one_project(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+    self.assertEqual(manifest.projects, [])
+
+  def test_remove_one_project_one_remains(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <project name="yourproject" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+
+    self.assertEqual(len(manifest.projects), 1)
+    self.assertEqual(manifest.projects[0].name, 'yourproject')
+
+  def test_remove_one_project_doesnt_exist(self):
+    with self.assertRaises(manifest_xml.ManifestParseError):
+      manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+      manifest.projects
+
+  def test_remove_one_optional_project_doesnt_exist(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <remove-project name="myproject" optional="true" />
+</manifest>
+""")
+    self.assertEqual(manifest.projects, [])
+
+
+class ExtendProjectElementTests(ManifestParseTestCase):
+  """Tests for <extend-project>."""
+
+  def test_extend_project_dest_path_single_match(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <extend-project name="myproject" dest-path="bar" />
+</manifest>
+""")
+    self.assertEqual(len(manifest.projects), 1)
+    self.assertEqual(manifest.projects[0].relpath, 'bar')
+
+  def test_extend_project_dest_path_multi_match(self):
+    with self.assertRaises(manifest_xml.ManifestParseError):
+      manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" path="x" />
+  <project name="myproject" path="y" />
+  <extend-project name="myproject" dest-path="bar" />
+</manifest>
+""")
+      manifest.projects
+
+  def test_extend_project_dest_path_multi_match_path_specified(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" path="x" />
+  <project name="myproject" path="y" />
+  <extend-project name="myproject" path="x" dest-path="bar" />
+</manifest>
+""")
+    self.assertEqual(len(manifest.projects), 2)
+    if manifest.projects[0].relpath == 'y':
+      self.assertEqual(manifest.projects[1].relpath, 'bar')
+    else:
+      self.assertEqual(manifest.projects[0].relpath, 'bar')
+      self.assertEqual(manifest.projects[1].relpath, 'y')
diff --git a/tests/test_platform_utils.py b/tests/test_platform_utils.py
new file mode 100644
index 0000000..55b7805
--- /dev/null
+++ b/tests/test_platform_utils.py
@@ -0,0 +1,50 @@
+# Copyright 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Unittests for the platform_utils.py module."""
+
+import os
+import tempfile
+import unittest
+
+import platform_utils
+
+
+class RemoveTests(unittest.TestCase):
+  """Check remove() helper."""
+
+  def testMissingOk(self):
+    """Check missing_ok handling."""
+    with tempfile.TemporaryDirectory() as tmpdir:
+      path = os.path.join(tmpdir, 'test')
+
+      # Should not fail.
+      platform_utils.remove(path, missing_ok=True)
+
+      # Should fail.
+      self.assertRaises(OSError, platform_utils.remove, path)
+      self.assertRaises(OSError, platform_utils.remove, path, missing_ok=False)
+
+      # Should not fail if it exists.
+      open(path, 'w').close()
+      platform_utils.remove(path, missing_ok=True)
+      self.assertFalse(os.path.exists(path))
+
+      open(path, 'w').close()
+      platform_utils.remove(path)
+      self.assertFalse(os.path.exists(path))
+
+      open(path, 'w').close()
+      platform_utils.remove(path, missing_ok=False)
+      self.assertFalse(os.path.exists(path))
diff --git a/tests/test_ssh.py b/tests/test_ssh.py
new file mode 100644
index 0000000..ffb5cb9
--- /dev/null
+++ b/tests/test_ssh.py
@@ -0,0 +1,74 @@
+# Copyright 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Unittests for the ssh.py module."""
+
+import multiprocessing
+import subprocess
+import unittest
+from unittest import mock
+
+import ssh
+
+
+class SshTests(unittest.TestCase):
+  """Tests the ssh functions."""
+
+  def test_parse_ssh_version(self):
+    """Check _parse_ssh_version() handling."""
+    ver = ssh._parse_ssh_version('Unknown\n')
+    self.assertEqual(ver, ())
+    ver = ssh._parse_ssh_version('OpenSSH_1.0\n')
+    self.assertEqual(ver, (1, 0))
+    ver = ssh._parse_ssh_version('OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.13, OpenSSL 1.0.1f 6 Jan 2014\n')
+    self.assertEqual(ver, (6, 6, 1))
+    ver = ssh._parse_ssh_version('OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017\n')
+    self.assertEqual(ver, (7, 6))
+
+  def test_version(self):
+    """Check version() handling."""
+    with mock.patch('ssh._run_ssh_version', return_value='OpenSSH_1.2\n'):
+      self.assertEqual(ssh.version(), (1, 2))
+
+  def test_context_manager_empty(self):
+    """Verify context manager with no clients works correctly."""
+    with multiprocessing.Manager() as manager:
+      with ssh.ProxyManager(manager):
+        pass
+
+  def test_context_manager_child_cleanup(self):
+    """Verify orphaned clients & masters get cleaned up."""
+    with multiprocessing.Manager() as manager:
+      with ssh.ProxyManager(manager) as ssh_proxy:
+        client = subprocess.Popen(['sleep', '964853320'])
+        ssh_proxy.add_client(client)
+        master = subprocess.Popen(['sleep', '964853321'])
+        ssh_proxy.add_master(master)
+    # If the process still exists, these will throw timeout errors.
+    client.wait(0)
+    master.wait(0)
+
+  def test_ssh_sock(self):
+    """Check sock() function."""
+    manager = multiprocessing.Manager()
+    proxy = ssh.ProxyManager(manager)
+    with mock.patch('tempfile.mkdtemp', return_value='/tmp/foo'):
+      # old ssh version uses port
+      with mock.patch('ssh.version', return_value=(6, 6)):
+        self.assertTrue(proxy.sock().endswith('%p'))
+
+      proxy._sock_path = None
+      # new ssh version uses hash
+      with mock.patch('ssh.version', return_value=(6, 7)):
+        self.assertTrue(proxy.sock().endswith('%C'))
diff --git a/tests/test_subcmds.py b/tests/test_subcmds.py
index 2234e64..bc53051 100644
--- a/tests/test_subcmds.py
+++ b/tests/test_subcmds.py
@@ -14,6 +14,7 @@
 
 """Unittests for the subcmds module (mostly __init__.py than subcommands)."""
 
+import optparse
 import unittest
 
 import subcmds
@@ -41,3 +42,32 @@
 
       # Reject internal python paths like "__init__".
       self.assertFalse(cmd.startswith('__'))
+
+  def test_help_desc_style(self):
+    """Force some consistency in option descriptions.
+
+    Python's optparse & argparse has a few default options like --help.  Their
+    option description text uses lowercase sentence fragments, so enforce our
+    options follow the same style so UI is consistent.
+
+    We enforce:
+    * Text starts with lowercase.
+    * Text doesn't end with period.
+    """
+    for name, cls in subcmds.all_commands.items():
+      cmd = cls()
+      parser = cmd.OptionParser
+      for option in parser.option_list:
+        if option.help == optparse.SUPPRESS_HELP:
+          continue
+
+        c = option.help[0]
+        self.assertEqual(
+            c.lower(), c,
+            msg=f'subcmds/{name}.py: {option.get_opt_string()}: help text '
+                f'should start with lowercase: "{option.help}"')
+
+        self.assertNotEqual(
+            option.help[-1], '.',
+            msg=f'subcmds/{name}.py: {option.get_opt_string()}: help text '
+                f'should not end in a period: "{option.help}"')
diff --git a/tox.ini b/tox.ini
index 3282de1..aa4e297 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,11 +15,10 @@
 # https://tox.readthedocs.io/
 
 [tox]
-envlist = py35, py36, py37, py38, py39
+envlist = py36, py37, py38, py39
 
 [gh-actions]
 python =
-    3.5: py35
     3.6: py36
     3.7: py37
     3.8: py38