Fix porting comments when all edits are due to rebase

Porting comments relies on the diff logic to map positions of comments
from the source patchset to the target patchset. By default, the diff
logic in DiffOperations skips files  whose edits are all due to rebase
between the old/new commits. This made sense for the diff view because
we don't want to bother users looking at a modified file in the files
tab when it was really unchanged.

For porting comments, this resulted in the porter thinking that the file
was unchanged, hence it mapped the comment to the same line in the
target patchset which is wrong. We need to account for all edits
(including rebase edits) when doing the mapping.

In this change, I added another parameter to the DiffOperations methods
named "DiffOptions" that controls whether we would like to skip files
whose edits are all due to rebase or not. I updated all callers to use
the current default option, hence this change is a no/op for these
callers. I only updated the CommentPorter caller to pass this options
with false.

Note that this change to the API can break external callers (e.g.
plugins) that rely on this interface. I'm aware of one such plugin which
is the code-owners plugin. I'll adapt it in a follow up change.

I added a test in PortedCommentsIT for this case: the test fails before
this change (comment is ported to the wrong line) and passes with it.

Bug: Google b/204837335
Change-Id: I22a465e493776772a1440c9c6294478335fa2bcc
19 files changed
tree: 210d9af6ae356549e2df69c69dcb226facf5185a
  1. .settings/
  2. .ts-out/
  3. antlr3/
  4. contrib/
  5. Documentation/
  6. e2e-tests/
  7. java/
  8. javatests/
  9. lib/
  10. modules/
  11. plugins/
  12. polygerrit-ui/
  13. prolog/
  14. prologtests/
  15. proto/
  16. resources/
  17. tools/
  18. webapp/
  19. .bazelignore
  20. .bazelproject
  21. .bazelrc
  22. .bazelversion
  23. .editorconfig
  24. .git-blame-ignore-revs
  25. .gitignore
  26. .gitmodules
  27. .gitreview
  28. .mailmap
  29. .pydevproject
  30. .zuul.yaml
  31. BUILD
  32. COPYING
  33. INSTALL
  34. Jenkinsfile
  35. package.json
  36. README.md
  37. SUBMITTING_PATCHES
  38. version.bzl
  39. WORKSPACE
  40. yarn.lock
README.md

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

Build Status Maven Central

Objective

Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer.

Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer.

Documentation

For information about how to install and use Gerrit, refer to the documentation.

Source

Our canonical Git repository is located on googlesource.com. There is a mirror of the repository on Github.

Reporting bugs

Please report bugs on the issue tracker.

Contribute

Gerrit is the work of hundreds of contributors. We appreciate your help!

Please read the contribution guidelines.

Note that we do not accept Pull Requests via the Github mirror.

Getting in contact

The Developer Mailing list is repo-discuss on Google Groups.

License

Gerrit is provided under the Apache License 2.0.

Build

Install Bazel and run the following:

    git clone --recurse-submodules https://gerrit.googlesource.com/gerrit
    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

The instruction how to configure GerritForge/BinTray repositories is here

On Debian/Ubuntu run:

    apt-get update & apt-get install gerrit=<version>-<release>

NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

Docker images of Gerrit are available on DockerHub

To run a CentOS 8 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-centos8

To run a Ubuntu 20.04 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-ubuntu20

NOTE: release is optional. Last released package of the version is installed if the release number is omitted.