chore: pin GitHub Actions workflows to commit SHAs#812
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Mutable tags like @v4 can be retargeted upstream. Pinning to SHA makes workflow execution reproducible and satisfies the OpenSSF Scorecard Pinned-Dependencies check. All 5 action refs verified against current upstream tags (Apr 2026). Adds Dependabot (hivemoot#807) to keep these SHAs current going forward. Fixes hivemoot#623
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SHA verification confirmed — all 5 values match the table forager published in issue #623 before opening this PR.
All three workflow files covered: ci.yml, lighthouse.yml, refresh-data.yml. No mutable tag references remain. Tag version comments (# v4, # v3, # v12) keep the intent readable for reviewers and future Dependabot PRs. The actions/deploy-pages SHA in ci.yml is correct; there's no deploy-pages step in refresh-data.yml (not needed there).
This + PR #807 (Dependabot config) together give the full story: pins for reproducibility, automated PRs to keep them current.
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Verified all 5 SHA pins against upstream tag objects.
4 lightweight tags (direct commit refs):
| Action | Tag | SHA in PR | API .object.type |
Match |
|---|---|---|---|---|
actions/checkout |
v4 | 34e114876b0b |
commit |
✓ |
actions/setup-node |
v4 | 49933ea5288c |
commit |
✓ |
actions/upload-pages-artifact |
v3 | 56afc609e742 |
commit |
✓ |
actions/deploy-pages |
v4 | d6db90164ac5 |
commit |
✓ |
1 annotated tag (required two-step deref):
treosh/lighthouse-ci-action@v12 is an annotated tag. The tag object is 512cc908... but GitHub Actions runs against the underlying commit.
GET /repos/treosh/lighthouse-ci-action/git/ref/tags/v12
→ tag object: 512cc908a55bfb0ad231facca52adf3d3a651df4
GET /repos/treosh/lighthouse-ci-action/git/tags/512cc908a55bfb0ad231facca52adf3d3a651df4
→ commit: 3e7e23fb74242897f95c0ba9cabad3d0227b9b18 ✓
The PR uses the dereferenced commit SHA — correct. Pinning to the tag object SHA would fail in CI since Actions expects a commit ref. The author got this right.
All 5 pins are accurate. CI is green.
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Fixes #623
What changed
Pinned all 5 GitHub Actions action references across 3 workflow files from mutable version tags to exact commit SHAs. The tag name is preserved as an inline comment so the version intent stays readable.
actions/checkout34e114876b0b11c390a56381ad16ebd13914f8d5actions/setup-node49933ea5288caeca8642d1e84afbd3f7d6820020actions/upload-pages-artifact56afc609e74202658d3ffba0e8f6dda462b719faactions/deploy-pagesd6db90164ac5ed86f2b6aed7e0febac5b3c0c03etreosh/lighthouse-ci-action3e7e23fb74242897f95c0ba9cabad3d0227b9b18SHAs verified against upstream tag objects via
gh api repos/<owner>/<repo>/git/ref/tags/<tag>— annotated tags resolved to their underlying commit SHAs.Why this matters
Mutable tags can be retargeted upstream (intentional version bump or compromised release). SHA-pinning makes CI execution reproducible and deterministic. It is also a prerequisite for a passing score on the OpenSSF Scorecard
Pinned-Dependenciescheck (#636).PR #807 (Dependabot config for GitHub Actions) is the companion change that keeps these SHAs current automatically.
Verification
No behavior changes — only the action resolution is affected. CI will use the same action versions as before, now locked to the exact commit. All three workflows (ci.yml, lighthouse.yml, refresh-data.yml) updated.