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actions: add action to validate signature #744

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30 changes: 30 additions & 0 deletions .github/workflows/verify-signature.yml
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Original file line number Diff line number Diff line change
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name: Enforce Signed Commits

on:
pull_request:
branches: [develop]

jobs:
check_signed_commits:
runs-on: ubuntu-latest
steps:
- name: Checkout code
uses: actions/checkout@v4

- name: Get the SHA before the first commit
id: first_commit_parent
run: |
BASE_SHA="${{ github.event.pull_request.base.sha }}"
HEAD_SHA="${{ github.sha }}"
PARENT_SHA=$(git merge-base $BASE_SHA $HEAD_SHA)
echo "The SHA before the first commit in this branch is: $PARENT_SHA"
echo "parent_sha=$PARENT_SHA" >> $GITHUB_OUTPUT

- name: Verify all commits in push are signed
run: |
git log ${{ steps.first_commit_parent.outputs.parent_sha }}..${{ github.sha }} --pretty="%H %G?" --no-merges | while read commit_hash signature_status; do
if [ "$signature_status" != "U" ]; then
echo "Error: Unsigned commit found: $commit_hash"
exit 1
fi
done
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