opencensus-proto/RELEASING.md

How to Create a Release of OpenCensus Proto (for Maintainers Only)

Build Environments

We re-generate gen-go files and deploy jars to Maven Central under the following systems:

• Ubuntu 14.04

Other systems may also work, but we haven't verified them.

Release Go files

To generate the Go files from protos, you'll need to install protoc and protoc-gen-go plugin first. Follow the instructions here and here.

Then run the following commands to re-generate the gen-go files:

$ git checkout -b update-gen-go
$ cd src
$ ./mkgogen.sh
$ git commit -a -m "Update gen-go files."

Go through PR review and merge the changes to GitHub.

Tagging the Release

Our release branches follow the naming convention of v<major>.<minor>.x, while the tags include the patch version v<major>.<minor>.<patch>. For example, the same branch v0.4.x would be used to create all v0.4 tags (e.g. v0.4.0, v0.4.1).

In this section upstream repository refers to the main opencensus-proto github repository.

Before any push to the upstream repository you need to create a personal access token.

1. Create the release branch and push it to GitHub:

   $ MAJOR=0 MINOR=4 PATCH=0 # Set appropriately for new release
   $ VERSION_FILES=(
     build.gradle
     pom.xml
     )
   $ git checkout -b v$MAJOR.$MINOR.x master
   $ git push upstream v$MAJOR.$MINOR.x
   

2. Enable branch protection for the new branch, if you have admin access. Otherwise, let someone with admin access know that there is a new release branch.

   • Open the branch protection settings for the new branch, by following Github's instructions.

   • Copy the settings from a previous branch, i.e., check

     • Protect this branch
     • Require pull request reviews before merging
     • Require status checks to pass before merging
     • Include administrators

     Enable the following required status checks:

     • cla/google
     • continuous-integration/travis-ci

   • Uncheck everything else.

   • Click "Save changes".

3. For master branch:

   • Change root build files to the next minor snapshot (e.g. 0.5.0-SNAPSHOT).

   $ git checkout -b bump-version master
   # Change version to next minor (and keep -SNAPSHOT)
   $ sed -i 's/[0-9]\+\.[0-9]\+\.[0-9]\+\(.*CURRENT_OPENCENSUS_PROTO_VERSION\)/'$MAJOR.$((MINOR+1)).0'\1/' \
     "${VERSION_FILES[@]}"
   $ ./gradlew build
   $ git commit -a -m "Start $MAJOR.$((MINOR+1)).0 development cycle"
   

   • Go through PR review and push the master branch to GitHub:

   $ git checkout master
   $ git merge --ff-only bump-version
   $ git push upstream master
   

4. For vMajor.Minor.x branch:

   • Change root build files to remove "-SNAPSHOT" for the next release version (e.g. 0.4.0). Commit the result and make a tag:

   $ git checkout -b release v$MAJOR.$MINOR.x
   # Change version to remove -SNAPSHOT
   $ sed -i 's/-SNAPSHOT\(.*CURRENT_OPENCENSUS_PROTO_VERSION\)/\1/' "${VERSION_FILES[@]}"
   $ ./gradlew build
   $ git commit -a -m "Bump version to $MAJOR.$MINOR.$PATCH"
   $ git tag -a v$MAJOR.$MINOR.$PATCH -m "Version $MAJOR.$MINOR.$PATCH"
   

   • Change root build files to the next snapshot version (e.g. 0.4.1-SNAPSHOT). Commit the result:

   # Change version to next patch and add -SNAPSHOT
   $ sed -i 's/[0-9]\+\.[0-9]\+\.[0-9]\+\(.*CURRENT_OPENCENSUS_PROTO_VERSION\)/'$MAJOR.$MINOR.$((PATCH+1))-SNAPSHOT'\1/' \
    "${VERSION_FILES[@]}"
   $ ./gradlew build
   $ git commit -a -m "Bump version to $MAJOR.$MINOR.$((PATCH+1))-SNAPSHOT"
   

   • Go through PR review and push the release tag and updated release branch to GitHub:

   $ git checkout v$MAJOR.$MINOR.x
   $ git merge --ff-only release
   $ git push upstream v$MAJOR.$MINOR.$PATCH
   $ git push upstream v$MAJOR.$MINOR.x
   

Release Java Jar

Deployment to Maven Central (or the snapshot repo) is for all of the artifacts from the project.

Prerequisites

If you haven't done already, please follow the instructions here to set up the OSSRH (OSS Repository Hosting) account and signing keys. This is required for releasing to Maven Central.

Branch

Before building/deploying, be sure to switch to the appropriate tag. The tag must reference a commit that has been pushed to the main repository, i.e., has gone through code review. For the current release use:

$ git checkout -b v$MAJOR.$MINOR.$PATCH tags/v$MAJOR.$MINOR.$PATCH

Initial Deployment

The following command will build the whole project and upload it to Maven Central. Parallel building is not safe during uploadArchives.

$ ./gradlew clean build && ./gradlew -Dorg.gradle.parallel=false uploadArchives

If the version has the -SNAPSHOT suffix, the artifacts will automatically go to the snapshot repository. Otherwise it's a release deployment and the artifacts will go to a staging repository.

When deploying a Release, the deployment will create a new staging repository. You'll need to look up the ID in the OSSRH UI (usually in the form of opencensus-*).

Releasing on Maven Central

Once all of the artifacts have been pushed to the staging repository, the repository must first be closed, which will trigger several sanity checks on the repository. If this completes successfully, the repository can then be released, which will begin the process of pushing the new artifacts to Maven Central (the staging repository will be destroyed in the process). You can see the complete process for releasing to Maven Central on the OSSRH site.

Announcement

Once deployment is done, go to Github release page, press Draft a new release to write release notes about the new release.

You can use git log upstream/v$MAJOR.$((MINOR-1)).x..upstream/v$MAJOR.$MINOR.x --graph --first-parent or the Github compare tool to view a summary of all commits since last release as a reference.

Please pick major or important user-visible changes only.