GITHUB_SHA_SHORT Not Working in V4 about github-slug-action

[rlespinasse]

This bug occurs when this action is used before or without actions/checkout@v3

1. GITHUB_SHA_SHORT is filled

   - uses: actions/checkout@v3
   - uses: rlespinasse/github-slug-action@v4

2. GITHUB_SHA_SHORT isn't filled

   - uses: rlespinasse/github-slug-action@v4
   - uses: actions/checkout@v3

3. GITHUB_SHA_SHORT isn't filled

   - uses: rlespinasse/github-slug-action@v4

rlespinasse/github-slug-action@v3 is not impacted because the v3 version does not checkout reference (and so does not need a git repository).

Two possibilities to fix that

• 1️⃣ Document it as a feature, but this will make actions/checkout action mandatory for rlespinasse/github-slug-action@v4 (and this can be explained as one of the breaking changes of the v4 branch)
• 2️⃣ Make the rlespinasse/shortify-git-revision action support the shortify of the git revision even in case of a missing git repository (and document this behavior in both actions)

[rlespinasse]

We will go with the solution 2️⃣

[github-actions]

🎉 This issue has been resolved in version 4.0.1 🎉

The release is available on GitHub release

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