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Release Process

Typical workflow

  • Pull latest from main branch. git checkout main && git pull origin main
  • Determine release version string dependending on whether changes included in changelog are API breaking, it's a release candidate, etc. The release string should have the format "vX.Y.Z", with a possible trailing "-rcN" and follow semantic versioning.
  • Checkout branch named release-N where N is the version string. git checkout -b release-N
  • Update the version field in the package entry of Cargo.toml files.
    • The versions must be the same.
    • You need to update the workspace dependency cairo-vm, which you can find in the root cargo manifest under the section [workspace.dependencies].
    • Here is an example pull request with these changes.
  • Run cargo update and git add Cargo.lock
  • Update CHANGELOG.md:
    • Verify that the changelog is up to date.
    • Add a title with the release version string just below the Upcoming Changes section.
  • Commit your changes, push your branch, and create a pull request.
  • Merge after CI and review passes.
  • Pull latest from main again.
  • Tag commit with version string and push tag. git tag -a <version string> -m "Release..."
  • Watch the publish workflow run in Github Actions.
  • Verify all the crates are available on crates.io with the correct versions.
  • Create a release in Github.
    • Select the recently created tag.
    • Set the title to the version string.
    • If it is a release candidate, mark it as a draft release.
  • Announce release through corresponding channels.

Hotfix releases

Sometimes there's a critical bug in a released version and we made breaking changes in main since. To push a non-breaking hotfix, you need to follow the original steps but basing using the release branch you created previously as base and bumping the patch level.

Retroactive releases

In the case we want to push a new release from a revision other than HEAD (say, we introduced features that we'd rather not ship yet), there would be no base commit to compare to for the normal GitHub PR, as it can only merge branches. This means we lose the review instance before publishing. A solution is branching twice, once to diverge from main and one for making the needed changes and creating a PR against the original commit.