ci: improve commit lint

Author: soyuka

.github/workflows/commitlint.yml

@@ -0,0 +1,32 @@
+name: Commit Lint
+
+on:
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  commitlint:
+    if: github.event_name == 'pull_request_target'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Fetch PR head
+        run: git fetch origin pull/${{ github.event.pull_request.number }}/head:pr_head
+      - name: Run commitlint
+        run: |
+            merge_base_sha=$(git merge-base HEAD pr_head)
+            first_commit_sha=$(git rev-list --no-merges --reverse $merge_base_sha..pr_head | head -n 1)
+
+            if [ -z "$first_commit_sha" ]; then
+              echo "Could not determine the first commit of the PR. Skipping."
+              exit 0
+            fi
+
+            commit_message=$(git log -1 --pretty=%B $first_commit_sha)
+            # we can't use npx see https://github.com/conventional-changelog/commitlint/issues/613
+            echo '{}' > package.json
+            npm install --no-fund --no-audit @commitlint/config-conventional @commitlint/cli
+            echo "$commit_message" | ./node_modules/.bin/commitlint -g .commitlintrc
+