Unable to Pin to Specific SHA

[jeremy-harnois]

GitHub's Security hardening for [third-party] GitHub Actions recommends pinning third-party actions to a specific full length SHA:

You can help mitigate this risk by following these good practices:

• Pin actions to a full length commit SHA

  Pinning an action to a full length commit SHA is currently the only way to use an action as an immutable release. Pinning to a particular SHA helps mitigate the risk of a bad actor adding a backdoor to the action's repository, as they would need to generate a SHA-1 collision for a valid Git object payload. When selecting a SHA, you should verify it is from the action's repository and not a repository fork.

I tried doing so with uses: int128/hide-comment-action@9526e5fa1c7a9dee4c37bf7b2319d65b3e04e4d1 but encountered an error:

Error: File not found: '/opt/actions-runner/_work/_actions/int128/hide-comment-action/9526e5fa1c7a9dee4c37bf7b2319d65b3e04e4d1/dist/index.js'

Digging in a bit, I see dist/ doesn't exist on checkout and is instead built as part of a release, which is counter to how other actions like actions/checkout are provided.

Please consider having an always-present dist/ so we can pin to specific SHAs (or make a conscious decision otherwise) . Thanks!