T6238: Check poll request title action requires the python script

The `check-pr-title-and-commit-messages.py` that used for the action
is not exists.
Add this script.

(cherry picked from commit 06d12a527eb6601e67c36a740c81974f64752abe)

1 files changed, 54 insertions, 0 deletions

diff --git a/scripts/check-pr-title-and-commit-messages.py b/scripts/check-pr-title-and-commit-messages.py
new file mode 100755
index 00000000..8fe3ca79
--- /dev/null
+++ b/scripts/check-pr-title-and-commit-messages.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+import time
+
+import requests
+
+# Use the same regex for PR title and commit messages for now
+title_regex = r'^(([a-zA-Z\-_.]+:\s)?)T\d+:\s+[^\s]+.*'
+commit_regex = title_regex
+
+
+def check_pr_title(title):
+    if not re.match(title_regex, title):
+        print(f"PR title '{title}' does not match the required format!")
+        print("Valid title example: T99999: make IPsec secure")
+        sys.exit(1)
+
+
+def check_commit_message(title):
+    if not re.match(commit_regex, title):
+        print("Commit title '{title}' does not match the required format!")
+        print("Valid title example: T99999: make IPsec secure")
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("Please specify pull request URL!")
+        sys.exit(1)
+
+    # There seems to be a race condition that causes this scripts to receive
+    # an incomplete PR object that is missing certain fields,
+    # which causes temporary CI failures that require re-running the script
+    #
+    # It's probably better to add a small delay to prevent that
+    time.sleep(5)
+
+    # Get the pull request object
+    pr = requests.get(sys.argv[1]).json()
+    if "title" not in pr:
+        print("The PR object does not have a title field!")
+        print("Did not receive a valid pull request object, please check the URL!")
+        sys.exit(1)
+
+    check_pr_title(pr["title"])
+
+    # Get the list of commits
+    commits = requests.get(pr["commits_url"]).json()
+    for c in commits:
+        # Retrieve every individual commit and check its title
+        co = requests.get(c["url"]).json()
+        check_commit_message(co["commit"]["message"])