Pin GitHub Actions to full-length commit SHAs

[Dan Fiedler (danfiedler-msft)]

🤖 PR Validation — ️✔️ All clear

Breaking Changes
️✔️ None

Summary

This PR pins GitHub Actions to full-length commit SHAs for improved security and reproducibility and adds a 7 day cooldown to Dependabot configuration for GitHub Actions. This work is described in more detail at https://aka.ms/action-pinning.

Why?

Pinning actions to commit SHAs prevents supply-chain attacks where a tag could be moved to point to malicious code. This is a recommended security best practice per the GitHub Actions security hardening guide.

This change mitigates the risk of tag retargeting to malicious code as seen in incidents like the tj-actions/changed-files action compromise or codfish/semantic-release-action compromise and improves the integrity and reproducibility of the CI/CD pipeline.

What changed?

Action pinning: Third-party action references in .github/workflows/ that used mutable tag-based references (e.g., actions/checkout@v4) have been updated to full-length commit SHAs with a version comment (e.g., actions/checkout@<sha> # v4) using the pinact tool. References that were already pinned to a SHA, or that used immutable release tags, were left unchanged.

Dependabot configuration: .github/dependabot.yml has been updated to ensure a github-actions package-ecosystem section is present with a cooldown configuration (default-days: 7). If the file did not exist, it was created. If a github-actions section already existed, only the cooldown block was added or its default-days value was increased to 7 if it was lower. The 7-day cooldown provides a window for the community to detect and report compromised releases before they are automatically proposed as updates, reducing exposure to supply-chain attacks via newly published malicious versions.

Is this safe to merge?

Yes. The pinned SHAs correspond to the same commits that the existing tags pointed to. No behavioral changes in action execution are introduced. You can verify the pinned SHA value using the GitHub REST API (e.g., the commit hash for actions/checkout@v7 can be found in the sha property in the JSON response for GET https://api.github.com/repos/actions/checkout/commits/v7).

Additional Information

For more information, please see https://aka.ms/action-pinning

[azure-client-tools-bot-prd]

Hi Dan Fiedler (@danfiedler-msft),
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in pyproject.toml (or setup.py, if the extension has not migrated yet) as well.

[azure-pipelines]

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[Copilot]

Pull request overview

This PR hardens the repository’s CI/CD supply chain by replacing mutable GitHub Actions version tags with full-length commit SHA pins across workflows and the local composite action, and adds a Dependabot configuration for GitHub Actions updates with a 7-day cooldown.

Changes:

• Pin all third-party GitHub Actions references in .github/workflows/ to full-length commit SHAs (with version comments).
• Pin GitHub Actions references in the local composite action .github/actions/env-setup/action.yml to full-length commit SHAs.
• Add .github/dependabot.yml to manage GitHub Actions updates with grouping and a 7-day cooldown.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/VersionCalPRComment.yml	Pins referenced actions (checkout/setup-python/upload/download/file-existence/get-labels) to commit SHAs.
.github/workflows/TriggerExtensionRelease.yml	Pins azure/login and azure/cli action references to commit SHAs.
.github/workflows/TestTriggerExtensionRelease.yml	Pins azure/login and azure/cli action references to commit SHAs.
.github/workflows/GitHookNotice.yml	Pins actions/checkout to a commit SHA.
.github/workflows/CreateReleaseTag.yml	Pins actions/checkout and actions/setup-python to commit SHAs.
.github/workflows/CCOA.yml	Pins actions/github-script to a commit SHA.
.github/workflows/BlockPRMerge.yml	Pins actions/github-script to a commit SHA.
.github/workflows/AzdevStyle.yml	Pins actions/checkout to a commit SHA.
.github/workflows/AzdevLinter.yml	Pins actions/checkout to a commit SHA.
.github/workflows/AddIssueCommentWithLabel.yml	Pins actions/checkout and mshick/add-pr-comment to commit SHAs.
.github/workflows/AddIssueComment.yml	Pins hasura/comment-progress to a commit SHA.
.github/dependabot.yml	Adds Dependabot config for github-actions with grouping and a 7-day cooldown.
.github/actions/env-setup/action.yml	Pins actions/checkout and actions/setup-python to commit SHAs within the composite action.

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[Yong Zhang (yonzhan)]

Pin GitHub Actions

[Ethan Yang (necusjz)]

/azp run

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).