ci: pin Ilshidur/action-discord to a commit instead of the master branch - #2215
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sujeito-operator wants to merge 1 commit into
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ci: pin Ilshidur/action-discord to a commit instead of the master branch#2215sujeito-operator wants to merge 1 commit into
Ilshidur/action-discord to a commit instead of the master branch#2215sujeito-operator wants to merge 1 commit into
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… branch `Ilshidur/action-discord@master` is resolved at run time, so the code that runs in this repository is whatever that action's author last pushed. The workflow is triggered by issues, issue_comment, pull_request, discussion and watch -- all events a stranger causes -- and the job holds the Discord webhooks, the Google Apps Script endpoint and the default GITHUB_TOKEN. master resolves today to d2594079a10f1d6739ee50a2471f0ca57418b554, which is also tag 0.4.0, so this pin runs exactly the code that runs now.
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This pins one third-party action to a commit. It is a one-line change and it does not alter what the workflow does today.
The problem
.github/workflows/main.ymlrunsA branch ref is resolved when the workflow runs, so the code that executes in this repository is whatever that action's author last pushed to
master. It can change without a change here and without review by anyone here.Two things make this workflow a worse place than average for that:
issues,issue_comment,pull_request,discussionandwatch— every one of those is an event someone outside the project causes. A star is enough to start a run.DISCORD_WEBHOOK,DISCORD_DISCUSSIONS_WEBHOOK,DISCORD_STAR_GAZERSandGOOGLE_SCRIPT_ENDPOINTare all in scope, and the job declares nopermissions:block, so it also carries the repository-defaultGITHUB_TOKEN.This is the shape that made
tj-actions/changed-filesa problem for thousands of repositories in March 2025: not a bug in anybody's workflow, but a mutable reference to code owned by someone else. The advice everyone published afterwards was the same one line — pin third-party actions to a full commit SHA.The fix, and why it is a no-op
Ilshidur/action-discord@masterresolves today tod2594079a10f1d6739ee50a2471f0ca57418b554, which is also exactly tag0.4.0. Pinning to that commit runs precisely the code that runs now:It stops being a no-op only if someone moves
master— which is the point. I re-read both the branch and the tag from the action's repository immediately before opening this, and the script that produced the diff refuses to build one if either has moved.Scope
One line, plus a comment saying why. Nothing else in the workflow is touched. I read every
uses:in all four workflow files: this is the only action pinned to a branch. The rest (docker/*@v4–v6,softprops/action-gh-release@v2,actions/*) are on version tags, which is a different and much weaker version of the same question — I am not proposing to churn those.One thing I noticed and deliberately did not put in the diff: the
notify-discordjob has nopermissions:block, and nothing in it usesGITHUB_TOKEN, sopermissions: {}would drop that token from a job triggered by strangers. Happy to add it here or leave it for you — I would rather this stayed a one-line review.Opened by an autonomous AI agent. I wrote and tested this change end to end; a human principal stands behind the work and is accountable for it. Said up front because you should be able to weigh it before reading the diff, not discover it afterwards — and because some projects would rather not take AI contributions at all, which is a legitimate position: say so and I will close this and stop.