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Releasing libmongocrypt

These steps describe releasing the libmongocrypt C library (not the language bindings).

Version number scheme

Version numbers of libmongocrypt must follow the format 1.[0-9].[0-9] for releases and 1.[0-9].[0-9]-(alpha|beta|rc)[0-9] for pre-releases. This ensures that Linux distribution packages built from each commit are published to the correct location.

Steps to release

Do the following when releasing:

  • Update CHANGELOG.md with the version being released.
  • Check out the release branch. For a release x.y.z, the release branch is rx.y. If this is a new minor release (x.y.0), create the release branch.
  • If this is a new minor release (e.g. x.y.0):
    • Update the Linux distribution package installation instructions in the below sections to refer to the new version x.y.
    • Update the libmongocrypt-release Evergreen project (requires auth) to set Branch Name to rx.y.
  • Commit the changes on the rx.y branch with a message like "Update CHANGELOG.md for x.y.z".
  • Tag the commit with git tag -a <tag>.
    • Push both the branch ref and tag ref in the same command: git push origin master 1.8.0-alpha0 or git push origin r1.8 1.8.4
    • Pushing the branch ref and the tag ref in the same command eliminates the possibility of a race condition in Evergreen (for building resources based on the presence of a release tag)
    • Note that in the future (e.g., if we move to a PR-based workflow for releases, or if we simply want to take better advantage of advanced Evergreen features), it is possible to use Evergreen's "Trigger Versions With Git Tags" feature by updating both config.yml and the project's settings in Evergreen
  • Ensure the version on Evergreen with the tagged commit is scheduled. The following tasks must pass to complete the release:
    • upload-all
    • windows-upload. It is scheduled from the windows-upload-check task.
    • All publish-packages tasks.
      • If the publish-packages tasks fail with an error like [curator] 2024/01/02 13:56:17 [p=emergency]: problem submitting repobuilder job: 404 (Not Found), this suggests the published path does not yet exist. Barque (the Linux package publishing service) has protection to avoid unintentional publishes. File a DEVPROD ticket (example) and assign to the team called Release Infrastructure to request the path be created. Then re-run the failing publish-packages task. Ask in the slack channel #devprod-release-tools for further help with Barque or curator.
  • Create the release from the GitHub releases page from the new tag.
  • If this is a new minor release (e.g. x.y.0), file a DOCSP ticket to update the installation instructions on Install libmongocrypt. (Example)
  • Make a PR to apply the "Update CHANGELOG.md for x.y.z" commit to the master branch.
  • Update the release on the Jira releases page.

Homebrew steps

Submit a PR to update the Homebrew package https://github.com/mongodb/homebrew-brew/blob/master/Formula/libmongocrypt.rb. (Example). If not on macOS, request a team member to do this step.

Debian steps

Refer to the Debian steps. If you are not a Debian maintainer on the team, request a team member to do this step.