Add a commit message checker

Author: soimkim

.github/workflows/pull-request.yml

@@ -8,6 +8,29 @@ on:
       - '*'
 
 jobs:
+  check-commit-message:
+    name: Check Commit Message
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get PR Commits
+        id: 'get-pr-commits'
+        uses: tim-actions/get-pr-commits@master
+        with:
+          token: ${{ secrets.TOKEN }}
+
+      - name: Check Subject Line Length
+        uses: tim-actions/[email protected]
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+          pattern: '^.{0,50}(\n.*)*$'
+          error: 'Subject too long (max 50)'
+      - name: Check Body Line Length
+        if: ${{ success() || failure() }}
+        uses: tim-actions/[email protected]
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+          pattern: '^.+(\n.{0,72})*$'
+          error: 'Body line too long (max 72)'
   build:
     runs-on: ubuntu-latest
     strategy: