github: Fix commit message parsing (#8817)

Author: poweifeng

.github/actions/get-commit-msg/action.yml

@@ -9,6 +9,13 @@ runs:
       if: github.event_name == 'push'
       shell: bash
       run: |
+        AUTHOR_NAME="${{ github.event.head_commit.author.name }}"
+        AUTHOR_EMAIL="${{ github.event.head_commit.author.email }}"
+        TSTAMP="${{ github.event.head_commit.timestamp }}"
+        echo "commit ${{ github.event.head_commit.id }}" >> /tmp/commit_msg.txt
+        echo "Author: ${AUTHOR_NAME}<${AUTHOR_EMAIL}>" >> /tmp/commit_msg.txt
+        echo "Date: ${TSTAMP}" >> /tmp/commit_msg.txt
+        echo "" >> /tmp/commit_msg.txt
         echo "${{ github.event.head_commit.message }}" >> /tmp/commit_msg.txt
     - name: Checkout code
       shell: bash
@@ -18,16 +25,19 @@ runs:
         echo "hash=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
         git checkout ${{ github.event.pull_request.head.ref }}
         COMMIT_MESSAGE=$(git log -1)
-        echo "${COMMIT_MESSAGE}" >> /tmp/commit_msg.txt
+        echo "$(git log -1)" >> /tmp/commit_msg.txt
     - shell: bash
       id: action_output
       run: |
         DELIMITER="EOF_FILE_CONTENT_$(date +%s)" # Using timestamp to make it more unique
         echo "msg<<$DELIMITER" >> "$GITHUB_OUTPUT"
         cat /tmp/commit_msg.txt >> "$GITHUB_OUTPUT"
         echo "$DELIMITER" >> "$GITHUB_OUTPUT"
+        echo "----- got commit message ---"
+        cat /tmp/commit_msg.txt
+        echo "----------------------------"
     - name: Uncheckout code
       shell: bash
       if: github.event_name == 'pull_request'
       run: |
-        git checkout ${{ steps.checkout.outputs.hash }}
+        git checkout ${{ steps.checkout_code.outputs.hash }}

test/renderdiff/src/commit_msg.py

@@ -21,15 +21,12 @@
 
 def _parse_commit(commit_str):
   lines = commit_str.split('\n')
-  if len(lines) >= 4:
+  if len(lines) >= 5:
     commit, author, date, _, title, *desc = lines
   else:
     print(commit_str, file=sys.stderr)
-    return (
-      lines[0],
-      lines[1],
-      '',
-    )
+    return (commit_str, '', '')
+
   commit = commit.split(' ')[1]
   title = title.strip()