Add git update server-side hook

1 files changed, 50 insertions, 0 deletions

diff --git a/.githooks/update b/.githooks/update
new file mode 100755
index 000000000..8e29fceed
--- /dev/null
+++ b/.githooks/update
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+import sys
+import subprocess
+
+
+ALLOWED_TAGS = ['feat', 'fix', 'perf', 'refactor', 'chore', 'other']
+
+
+def parse_args() -> tuple[str, str]:
+    old_ref = sys.argv[2]
+    new_ref = sys.argv[3]
+    return old_ref, new_ref
+
+
+def get_commit_subject(sha: str) -> str:
+    data = subprocess.check_output(
+        ['git', 'log', '-1', '--pretty=format:%s', sha])
+    return data.decode()
+
+
+def get_commit_shas(start_ref: str, end_ref: str) -> list[str]:
+    arg = f'{start_ref}..{end_ref}'
+    data = subprocess.check_output(['git', 'rev-list', arg])
+    text = data.decode()
+    text = text.strip()
+    return text.split('\n')
+
+
+def enforce_message_rules(subject: str) -> None:
+    tag, subject = subject.split(': ', maxsplit=1)
+    if tag not in ALLOWED_TAGS:
+        print('Unknown commit message tag:', tag)
+        sys.exit(1)
+
+    if not subject[0].isupper():
+        print('First letter after tag must be uppercase')
+        sys.exit(1)
+
+
+def main(args: tuple[str, str]) -> None:
+    shas = get_commit_shas(*args)
+    for sha in shas:
+        subject = get_commit_subject(sha)
+        enforce_message_rules(subject)
+
+
+if __name__ == "__main__":
+    args = parse_args()
+    main(args)