Making a new SDK release

This guide shows how to make a new Perfetto SDK release.

Before snapshotting a release, check that no release-blockers are open.

Check out the code:

git clone https://android.googlesource.com/platform/external/perfetto
cd perfetto

Next, decide the version number for the new release (vX.Y). The major version number (X) is incremented on every release (monthly). The minor version number is incremented only for minor changes / fixes on top of the monthly release (cherry-picks on the releases/vN.x branch).

Continue with the appropriate section below.

a) Creating a new major version

Create a release branch for the new major version (“v15.x” here):

git fetch origin
git push origin origin/master:refs/heads/releases/v15.x
git fetch origin
git checkout -b releases/v15.x -t origin/releases/v15.x

Continue with building the release.

b) Bumping the minor version

Check out the existing release branch (“5.x” here) and merge in the desired revision for the new release, resolving any conflicts you may encounter.

git checkout -b releases/v15.x -t origin/releases/v15.x

If you only want to introduce one or two patches in the new release, consider cherry-picking them individually:

git cherry-pick <sha1>

Otherwise, you can do a full merge:

git merge <sha1>

Building and tagging the release

  1. Generate and commit the amalgamated source files.
tools/gen_amalgamated --output sdk/perfetto
git add sdk/perfetto.{cc,h}
git commit -m "Amalgamated source for vX.Y"
  1. Check that the SDK example code works with the new release.
cd examples/sdk
cmake -B build
cmake --build build
  1. Upload the new release for review.
git cl upload --no-squash

If you get an error about a missing Change-Id field (remote: ERROR: commit a7c7c4c: missing Change-Id in message footer), install the commit-msg hook script and amend the change to make sure that field is present:

curl -Lo .git/hooks/commit-msg http://android-review.googlesource.com/tools/hooks/commit-msg
chmod u+x .git/hooks/commit-msg
git commit --amend
  1. Once the release has been reviewed and landed, create and push the tag for it (“vX.Y” being the new version).
# This brings the branch up to date with the CL landed in the step above.
git pull

git status
# Should print: Your branch is up to date with 'origin/releases/v15.x'.
# Do NOT proceed if your branch has diverged from origin/releases/vX.X

git tag -a -m "Perfetto vX.Y" vX.Y
git push origin vX.Y

  1. Update the documentation to point to the latest release.

Phew, you're done!