Documentation/dev-release.txt - gerrit - Git at Google

 = Making a Gerrit Release

 [NOTE]
 This document is meant primarily for Gerrit maintainers
 who have been given approval and submit status to the Gerrit
 projects.  Additionally, maintainers should be given owner
 status to the Gerrit web site.

 To make a Gerrit release involves a great deal of complex
 tasks and it is easy to miss a step so this document should
 hopefully serve as both a how to for those new to the process
 and as a checklist for those already familiar with these
 tasks.


 == Gerrit Release Type

 Here are some guidelines on release approaches depending on the
 type of release you want to make (`stable-fix`, `stable`, `rc0`,
 `rc1`...).

 [[stable]]
 === Stable

 A `stable` release is generally built from the `master` branch and may
 need to undergo some stabilization before releasing the final release.

 * Propose the release with any plans/objectives to the mailing list

 * Create a Gerrit `rc0`

 * If needed create a Gerrit `rc1`

 [NOTE]
 You may let in a few features to this release

 * If needed create a Gerrit `rc2`

 [NOTE]
 There should be no new features in this release, only bug fixes

 * Finally create the `stable` release (no `rc`)


 === Stable-Fix

 `stable-fix` releases should likely only contain bug fixes and doc
 updates.

 * Propose the release with any plans/objectives to the mailing list

 * This type of release does not need any RCs, release when the
 objectives are met


 [[security]]
 === Security-Fix

 `security-fix` releases should only contain bug fixes for security
 issues.

 For security issues it is important that they are only announced
 *after* fixed versions for all relevant releases have been published.
 Because of this, `security-fix` releases can't be prepared in the public
 `gerrit` project.

 `security-fix` releases are prepared in the `gerrit-security-fixes`
 project which is only readable by the Gerrit Maintainers. Only after
 a `security-fix` release has been published will the commits/tags made in
 the `gerrit-security-fixes` project be taken over into the public
 `gerrit` project.


 == Create the Actual Release

 [[update-versions]]
 === Update Versions and Create Release Tag

 Before doing the release build, the `GERRIT_VERSION` in the `version.bzl`
 file must be updated, e.g. change it from `$version-SNAPSHOT` to `$version`.

 In addition the version must be updated in a number of `*_pom.xml` files.

 To do this run the `./tools/version.py` script and provide the new
 version as parameter, e.g.:

 ----
   version=2.15
   ./tools/version.py $version
 ----

 Commit the changes and create a signed release tag on the new commit:

 ----
   git tag -s -m "v$version" "v$version"
 ----

 Tag the plugins:

 ----
   git submodule foreach git tag -s -m "v$version" "v$version"
 ----

 [[build-gerrit]]
 === Build Gerrit

 * Build the Gerrit WAR, API JARs and documentation
 +
 ----
   bazel build release Documentation:searchfree
   ./tools/maven/api.sh install
 ----

 * Verify the WAR version:
 +
 ----
   java -jar ~/dl/gerrit-$version.war --version
 ----
 * Try upgrading a test site and launching the daemon

 * Verify plugin versions
 +
 Verify the versions:
 +
 ----
   java -jar bazel-bin/release.war init --list-plugins
 ----

 [[publish-gerrit]]
 === Publish the Gerrit Release

 [[publish-to-maven-central]]
 ==== Publish the Gerrit artifacts to Maven Central

 * Make sure you have done the
 link:dev-release-deploy-config.html#deploy-configuration-setting-maven-central[
 configuration] for deploying to Maven Central

 * Make sure that the version is updated in the `version.bzl` file and in
 the `*_pom.xml` files as described in the link:#update-versions[Update
 Versions and Create Release Tag] section.

 * Push the WAR to Maven Central:
 +
 ----
   ./tools/maven/api.sh war_deploy
 ----

 * Push the plugin artifacts to Maven Central:
 +
 ----
   ./tools/maven/api.sh deploy
 ----

 * To where the artifacts are uploaded depends on the `GERRIT_VERSION` in
 the `version.bzl` file:

 ** SNAPSHOT versions are directly uploaded into the Sonatype snapshots
 repository and no further action is needed:
 +
 https://oss.sonatype.org/content/repositories/snapshots/com/google/gerrit/

 ** Release versions are uploaded into a staging repository in the
 link:https://oss.sonatype.org/[Sonatype Nexus Server].

 * Verify the staging repository

 ** Go to the link:https://oss.sonatype.org/[Sonatype Nexus Server] and
 sign in with your Sonatype credentials.

 ** Click on 'Build Promotion' in the left navigation bar under
 'Staging Repositories' and find the `comgooglegerrit-XXXX` staging
 repository.

 ** Verify its content
 +
 While the staging repository is open you can upload further content and
 also replace uploaded artifacts. If something is wrong with the staging
 repository you can drop it by selecting it and clicking on `Drop`.

 ** Run Sonatype validations on the staging repository
 +
 Select the staging repository and click on `Close`. This runs the
 Sonatype validations on the staging repository. The repository will
 only be closed if everything is OK. A closed repository cannot be
 modified anymore, but you may still drop it if you find any issues.

 ** Test closed staging repository
 +
 Once a repository is closed you can find the URL to it in the `Summary`
 section, e.g. https://oss.sonatype.org/content/repositories/comgooglegerrit-1029
 +
 Use this URL for further testing of the artifacts in this repository,
 e.g. to try building a plugin against the plugin API in this repository
 update the version in the `*_pom.xml` and configure the repository:
 +
 ----
   <repositories>
     <repository>
       <id>gerrit-staging-repository</id>
       <url>https://oss.sonatype.org/content/repositories/comgooglegerrit-1029</url>
     </repository>
   </repositories>
 ----

 * Release the staging repository
 +
 How to release a staging repository is described in the
 link:https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-8.a.2.ReleasingaStagingRepository[
 Sonatype OSS Maven Repository Usage Guide].
 +
 [WARNING]
 Releasing artifacts to Maven Central cannot be undone!

 ** Find the closed staging repository in the
 link:https://oss.sonatype.org/[Sonatype Nexus Server], select it and
 click on `Release`.

 ** The released artifacts are available in
 https://oss.sonatype.org/content/repositories/releases/com/google/gerrit/

 ** It may take up to 2 hours until the artifacts appear on Maven
 Central:
 +
 http://central.maven.org/maven2/com/google/gerrit/

 * [optional]: View download statistics

 ** Sign in to the
 link:https://oss.sonatype.org/[Sonatype Nexus Server].

 ** Click on 'Views/Repositories' in the left navigation bar under
 'Central Statistics'.

 ** Select `com.google.gerrit` as `Project`.


 [[publish-to-google-storage]]
 ==== Publish the Gerrit WAR to the Google Cloud Storage

 * go to the link:https://console.cloud.google.com/storage/browser/gerrit-releases/?project=api-project-164060093628[
 gerrit-releases bucket in the Google cloud storage console]
 * make sure you are signed in with your Gmail account
 * manually upload the Gerrit WAR file by using the `Upload` button

 [[push-stable]]
 ==== Push the Stable Branch

 * Create the stable branch `stable-$version` in the `gerrit` project via the
 link:https://gerrit-review.googlesource.com/admin/repos/gerrit,branches[
 Gerrit Web UI] or by push.

 * Push the commits done on `stable-$version` to `refs/for/stable-$version` and
 get them merged.

 * Create a change updating the `defaultbranch` field in the `.gitreview`
 to match the branch name created.


 [[push-tag]]
 ==== Push the Release Tag

 Push the new Release Tag:

 ----
   git push gerrit-review tag v$version
 ----

 Push the new Release Tag on the plugins:

 ----
   git submodule foreach git push gerrit-review tag v$version
 ----


 [[upload-documentation]]
 ==== Upload the Documentation

 * Extract the documentation files from the zip file generated from
 `bazel build searchfree`: `bazel-bin/Documentation/searchfree.zip`.

 * Upload the files manually via web browser to the appropriate folder
 in the
 link:https://console.cloud.google.com/storage/browser/gerrit-documentation/?project=api-project-164060093628[
 gerrit-documentation] storage bucket.

 [[finalize-release-notes]]
 === Finalize the Release Notes

 Upload a change on the homepage project to:

 * Remove 'In Development' caveat from the relevant section.

 * Add links to the released documentation and the .war file, and make the
 latest version bold.

 [[update-links]]
 ==== Update homepage links

 Upload a change on the link:https://gerrit-review.googlesource.com/admin/repos/homepage[
 homepage project] to change the version numbers to the new version.

 [[update-issues]]
 ==== Update the Issues

 Update the issues by hand. There is no script for this.

 Our current process is an issue should be updated to say `Status =
 Submitted, FixedIn-$version` once the change is submitted, but before the
 release.

 After the release is actually made, you can search in Google Code for
 `Status=Submitted FixedIn=$version` and then batch update these changes
 to say `Status=Released`. Make sure the pulldown says `All Issues`
 because `Status=Submitted` is considered a closed issue.


 [[announce]]
 ==== Announce on Mailing List

 Send an email to the mailing list to announce the release. The content of the
 announcement email is generated with the `release-announcement.py` script from
 the gerrit-release-tools repository, which automatically includes all the
 necessary links, hash values, and wraps the text in a PGP signature.

 For details refer to the documentation in the script's header, and/or the
 help text:

 ----
  ~/gerrit-release-tools/release-announcement.py --help
 ----

 [[increase-version]]
 === Increase Gerrit Version for Current Development

 All new development that is done in the `master` branch will be included in the
 next Gerrit release. The Gerrit version should be set to the snapshot version
 for the next release.

 Use the `version` tool to set the version in the `version.bzl` file:

 ----
  ./tools/version.py 2.6-SNAPSHOT
 ----

 Verify that the changes made by the tool are sane, then commit them, push
 the change for review on the master branch, and get it merged.

 [[merge-stable]]
 === Merge `stable` into `master`

 After every release, stable should be merged to master to ensure that
 none of the changes/fixes ever get lost.

 ----
   git config merge.summary true
   git checkout master
   git reset --hard origin/master
   git branch -f stable origin/stable
   git merge stable
 ----

 [[update-api-version-in-bazlets-repository]]

 Bazlets is used by gerrit plugins to simplify build process. To allow the
 new released version to be used by gerrit plugins,
 link:https://gerrit.googlesource.com/bazlets/+/master/gerrit_api.bzl#8[gerrit_api.bzl]
 must reference the new version. Upload a change to bazlets repository with
 api version upgrade.

 [[clean-up-on-master]]
 === Clean up on master

 Once you are done with the release, check if there are any code changes in the
 master branch that were gated on the next release. Mostly, these are
 feature-deprecations that we were holding off on to have a stable release where
 the feature is still contained, but marked as deprecated.

 See link:dev-processes.html#deprecating-features[Deprecating features] for
 details.

 GERRIT
 ------
 Part of link:index.html[Gerrit Code Review]

 SEARCHBOX
 ---------
	= Making a Gerrit Release

	[NOTE]
	This document is meant primarily for Gerrit maintainers
	who have been given approval and submit status to the Gerrit
	projects. Additionally, maintainers should be given owner
	status to the Gerrit web site.

	To make a Gerrit release involves a great deal of complex
	tasks and it is easy to miss a step so this document should
	hopefully serve as both a how to for those new to the process
	and as a checklist for those already familiar with these
	tasks.


	== Gerrit Release Type

	Here are some guidelines on release approaches depending on the
	type of release you want to make (`stable-fix`, `stable`, `rc0`,
	`rc1`...).

	[[stable]]
	=== Stable

	A `stable` release is generally built from the `master` branch and may
	need to undergo some stabilization before releasing the final release.

	* Propose the release with any plans/objectives to the mailing list

	* Create a Gerrit `rc0`

	* If needed create a Gerrit `rc1`

	[NOTE]
	You may let in a few features to this release

	* If needed create a Gerrit `rc2`

	[NOTE]
	There should be no new features in this release, only bug fixes

	* Finally create the `stable` release (no `rc`)


	=== Stable-Fix

	`stable-fix` releases should likely only contain bug fixes and doc
	updates.

	* Propose the release with any plans/objectives to the mailing list

	* This type of release does not need any RCs, release when the
	objectives are met


	[[security]]
	=== Security-Fix

	`security-fix` releases should only contain bug fixes for security
	issues.

	For security issues it is important that they are only announced
	after fixed versions for all relevant releases have been published.
	Because of this, `security-fix` releases can't be prepared in the public
	`gerrit` project.

	`security-fix` releases are prepared in the `gerrit-security-fixes`
	project which is only readable by the Gerrit Maintainers. Only after
	a `security-fix` release has been published will the commits/tags made in
	the `gerrit-security-fixes` project be taken over into the public
	`gerrit` project.


	== Create the Actual Release

	[[update-versions]]
	=== Update Versions and Create Release Tag

	Before doing the release build, the `GERRIT_VERSION` in the `version.bzl`
	file must be updated, e.g. change it from `$version-SNAPSHOT` to `$version`.

	In addition the version must be updated in a number of `*_pom.xml` files.

	To do this run the `./tools/version.py` script and provide the new
	version as parameter, e.g.:

	----
	version=2.15
	./tools/version.py $version
	----

	Commit the changes and create a signed release tag on the new commit:

	----
	git tag -s -m "v$version" "v$version"
	----

	Tag the plugins:

	----
	git submodule foreach git tag -s -m "v$version" "v$version"
	----

	[[build-gerrit]]
	=== Build Gerrit

	* Build the Gerrit WAR, API JARs and documentation
	+
	----
	bazel build release Documentation:searchfree
	./tools/maven/api.sh install
	----

	* Verify the WAR version:
	+
	----
	java -jar ~/dl/gerrit-$version.war --version
	----
	* Try upgrading a test site and launching the daemon

	* Verify plugin versions
	+
	Verify the versions:
	+
	----
	java -jar bazel-bin/release.war init --list-plugins
	----

	[[publish-gerrit]]
	=== Publish the Gerrit Release

	[[publish-to-maven-central]]
	==== Publish the Gerrit artifacts to Maven Central

	* Make sure you have done the
	link:dev-release-deploy-config.html#deploy-configuration-setting-maven-central[
	configuration] for deploying to Maven Central

	* Make sure that the version is updated in the `version.bzl` file and in
	the `*_pom.xml` files as described in the link:#update-versions[Update
	Versions and Create Release Tag] section.

	* Push the WAR to Maven Central:
	+
	----
	./tools/maven/api.sh war_deploy
	----

	* Push the plugin artifacts to Maven Central:
	+
	----
	./tools/maven/api.sh deploy
	----

	* To where the artifacts are uploaded depends on the `GERRIT_VERSION` in
	the `version.bzl` file:

	** SNAPSHOT versions are directly uploaded into the Sonatype snapshots
	repository and no further action is needed:
	+
	https://oss.sonatype.org/content/repositories/snapshots/com/google/gerrit/

	** Release versions are uploaded into a staging repository in the
	link:https://oss.sonatype.org/[Sonatype Nexus Server].

	* Verify the staging repository

	** Go to the link:https://oss.sonatype.org/[Sonatype Nexus Server] and
	sign in with your Sonatype credentials.

	** Click on 'Build Promotion' in the left navigation bar under
	'Staging Repositories' and find the `comgooglegerrit-XXXX` staging
	repository.

	** Verify its content
	+
	While the staging repository is open you can upload further content and
	also replace uploaded artifacts. If something is wrong with the staging
	repository you can drop it by selecting it and clicking on `Drop`.

	** Run Sonatype validations on the staging repository
	+
	Select the staging repository and click on `Close`. This runs the
	Sonatype validations on the staging repository. The repository will
	only be closed if everything is OK. A closed repository cannot be
	modified anymore, but you may still drop it if you find any issues.

	** Test closed staging repository
	+
	Once a repository is closed you can find the URL to it in the `Summary`
	section, e.g. https://oss.sonatype.org/content/repositories/comgooglegerrit-1029
	+
	Use this URL for further testing of the artifacts in this repository,
	e.g. to try building a plugin against the plugin API in this repository
	update the version in the `*_pom.xml` and configure the repository:
	+
	----
	<repositories>
	<repository>
	<id>gerrit-staging-repository</id>
	<url>https://oss.sonatype.org/content/repositories/comgooglegerrit-1029</url>
	</repository>
	</repositories>
	----

	* Release the staging repository
	+
	How to release a staging repository is described in the
	link:https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-8.a.2.ReleasingaStagingRepository[
	Sonatype OSS Maven Repository Usage Guide].
	+
	[WARNING]
	Releasing artifacts to Maven Central cannot be undone!

	** Find the closed staging repository in the
	link:https://oss.sonatype.org/[Sonatype Nexus Server], select it and
	click on `Release`.

	** The released artifacts are available in
	https://oss.sonatype.org/content/repositories/releases/com/google/gerrit/

	** It may take up to 2 hours until the artifacts appear on Maven
	Central:
	+
	http://central.maven.org/maven2/com/google/gerrit/

	* [optional]: View download statistics

	** Sign in to the
	link:https://oss.sonatype.org/[Sonatype Nexus Server].

	** Click on 'Views/Repositories' in the left navigation bar under
	'Central Statistics'.

	** Select `com.google.gerrit` as `Project`.


	[[publish-to-google-storage]]
	==== Publish the Gerrit WAR to the Google Cloud Storage

	* go to the link:https://console.cloud.google.com/storage/browser/gerrit-releases/?project=api-project-164060093628[
	gerrit-releases bucket in the Google cloud storage console]
	* make sure you are signed in with your Gmail account
	* manually upload the Gerrit WAR file by using the `Upload` button

	[[push-stable]]
	==== Push the Stable Branch

	* Create the stable branch `stable-$version` in the `gerrit` project via the
	link:https://gerrit-review.googlesource.com/admin/repos/gerrit,branches[
	Gerrit Web UI] or by push.

	* Push the commits done on `stable-$version` to `refs/for/stable-$version` and
	get them merged.

	* Create a change updating the `defaultbranch` field in the `.gitreview`
	to match the branch name created.


	[[push-tag]]
	==== Push the Release Tag

	Push the new Release Tag:

	----
	git push gerrit-review tag v$version
	----

	Push the new Release Tag on the plugins:

	----
	git submodule foreach git push gerrit-review tag v$version
	----


	[[upload-documentation]]
	==== Upload the Documentation

	* Extract the documentation files from the zip file generated from
	`bazel build searchfree`: `bazel-bin/Documentation/searchfree.zip`.

	* Upload the files manually via web browser to the appropriate folder
	in the
	link:https://console.cloud.google.com/storage/browser/gerrit-documentation/?project=api-project-164060093628[
	gerrit-documentation] storage bucket.

	[[finalize-release-notes]]
	=== Finalize the Release Notes

	Upload a change on the homepage project to:

	* Remove 'In Development' caveat from the relevant section.

	* Add links to the released documentation and the .war file, and make the
	latest version bold.

	[[update-links]]
	==== Update homepage links

	Upload a change on the link:https://gerrit-review.googlesource.com/admin/repos/homepage[
	homepage project] to change the version numbers to the new version.

	[[update-issues]]
	==== Update the Issues

	Update the issues by hand. There is no script for this.

	Our current process is an issue should be updated to say `Status =
	Submitted, FixedIn-$version` once the change is submitted, but before the
	release.

	After the release is actually made, you can search in Google Code for
	`Status=Submitted FixedIn=$version` and then batch update these changes
	to say `Status=Released`. Make sure the pulldown says `All Issues`
	because `Status=Submitted` is considered a closed issue.


	[[announce]]
	==== Announce on Mailing List

	Send an email to the mailing list to announce the release. The content of the
	announcement email is generated with the `release-announcement.py` script from
	the gerrit-release-tools repository, which automatically includes all the
	necessary links, hash values, and wraps the text in a PGP signature.

	For details refer to the documentation in the script's header, and/or the
	help text:

	----
	~/gerrit-release-tools/release-announcement.py --help
	----

	[[increase-version]]
	=== Increase Gerrit Version for Current Development

	All new development that is done in the `master` branch will be included in the
	next Gerrit release. The Gerrit version should be set to the snapshot version
	for the next release.

	Use the `version` tool to set the version in the `version.bzl` file:

	----
	./tools/version.py 2.6-SNAPSHOT
	----

	Verify that the changes made by the tool are sane, then commit them, push
	the change for review on the master branch, and get it merged.

	[[merge-stable]]
	=== Merge `stable` into `master`

	After every release, stable should be merged to master to ensure that
	none of the changes/fixes ever get lost.

	----
	git config merge.summary true
	git checkout master
	git reset --hard origin/master
	git branch -f stable origin/stable
	git merge stable
	----

	[[update-api-version-in-bazlets-repository]]

	Bazlets is used by gerrit plugins to simplify build process. To allow the
	new released version to be used by gerrit plugins,
	link:https://gerrit.googlesource.com/bazlets/+/master/gerrit_api.bzl#8[gerrit_api.bzl]
	must reference the new version. Upload a change to bazlets repository with
	api version upgrade.

	[[clean-up-on-master]]
	=== Clean up on master

	Once you are done with the release, check if there are any code changes in the
	master branch that were gated on the next release. Mostly, these are
	feature-deprecations that we were holding off on to have a stable release where
	the feature is still contained, but marked as deprecated.

	See link:dev-processes.html#deprecating-features[Deprecating features] for
	details.

	GERRIT
	------
	Part of link:index.html[Gerrit Code Review]

	SEARCHBOX
	---------