Testing single-commit action

Author: rohennes

.github/workflows/check-single-commit.yml

@@ -0,0 +1,34 @@
+name: Check single commit
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  check-single-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Count commits in PR
+        id: commits
+        run: |
+          PR_NUMBER=${{ github.event.pull_request.number }}
+          REPO_OWNER=${{ github.repository_owner }}
+          REPO_NAME=${{ github.event.repository.name }}
+
+          COMMIT_COUNT=$(curl -s \
+            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+            -H "Accept: application/vnd.github+json" \
+            "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/pulls/$PR_NUMBER/commits" \
+            | jq '. | length')
+
+          echo "commit_count=$COMMIT_COUNT" >> $GITHUB_OUTPUT
+
+      - name: Enforce single commit
+        run: |
+          if [ "${{ steps.commits.outputs.commit_count }}" -gt 1 ]; then
+            echo "❌ PR has more than one commit (${{
+              steps.commits.outputs.commit_count }})"
+            exit 1
+          else
+            echo "✅ PR has a single commit"
+          fi

test.adoc

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+This is the second commit and should trigger the single commit check to fail.