Allow GitLab EasyCLA status comment on MRs from forked repos

[lukaszgryglicki]

Signed-off-by: Lukasz Gryglicki lgryglicki@cncf.io

Assisted by OpenAI

Assisted by GitHub Copilot

Assisted by Claude

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: acd9ef93-ea7c-4f92-9dae-60627e7678d7

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch unicron-allow-gitlab-easycla-comment-status-from-forked-repo-merge-request

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Copilot]

Pull request overview

This PR makes the GitLab EasyCLA flow resilient to fork-based merge requests. Previously, when a webhook fired for an MR opened from a fork, SetCommitStatus could return a 404 because the commit SHA only exists in the fork's refs (not the upstream project the webhook targets), and the early return prevented the MR comment (containing the sign URL) from ever being posted. Now status failures are logged as warnings and the flow continues so the contributor still gets the comment with the sign URL.

Changes:

• Stop returning early when SetCommitStatus fails in both the missing-users and signed paths.
• Refactor the success path to use an if-with-init style consistent with the failure path.
• Add an explanatory comment about the fork/404 scenario.