Check CPython repo age

Author: hugovk

run_release.py

@@ -424,6 +424,24 @@ def run_blurb_release(db: ReleaseShelf) -> None:
     )
 
 
+def check_cpython_repo_age(db: ReleaseShelf) -> None:
+    # %ct = committer date, UNIX timestamp (for example, "1768300016")
+    timestamp = subprocess.check_output(
+        shlex.split('git log -1 --format="%ct"'), text=True, cwd=db["git_repo"]
+    ).strip()
+    age_seconds = time.time() - int(timestamp.strip())
+    is_old = age_seconds > 86400  # 1 day
+
+    # cr = committer date, relative (for example, "3 days ago")
+    out = subprocess.check_output(
+        shlex.split('git log -1 --format="%cr"'), text=True, cwd=db["git_repo"]
+    )
+    print(f"Last CPython commit was {out.strip()}")
+
+    if is_old and not ask_question("Continue with old repo?"):
+        raise ReleaseException("CPython repository is old")
+
+
 def check_cpython_repo_is_clean(db: ReleaseShelf) -> None:
     if subprocess.check_output(["git", "status", "--porcelain"], cwd=db["git_repo"]):
         raise ReleaseException("Git repository is not clean")
@@ -1381,6 +1399,7 @@ def _api_key(api_key: str) -> str:
         ),
         Task(check_sigstore_client, "Checking Sigstore CLI"),
         Task(check_buildbots, "Check buildbots are good"),
+        Task(check_cpython_repo_age, "Checking CPython repository age"),
         Task(check_cpython_repo_is_clean, "Checking Git repository is clean"),
         *(
             [Task(check_magic_number, "Checking the magic number is up-to-date")]