rm pre-commit-hooks (#38382)

* rm pre-commit-hooks

* rm test for the tests

* lil more

scripts/lint/check_shebang_scripts_are_executable.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+import argparse
+import shlex
+import subprocess
+import sys
+
+
+def staged_modes(filenames: list[str]) -> list[tuple[str, str]]:
+  if not filenames:
+    return []
+
+  result = subprocess.run(
+    ("git", "ls-files", "-z", "--stage", "--", *filenames),
+    check=True,
+    capture_output=True,
+    text=True,
+  )
+  entries = result.stdout.rstrip("\0").split("\0") if result.stdout else []
+  return [(entry.split(" ", 1)[0], entry.split("\t", 1)[1]) for entry in entries]
+
+
+def has_shebang(filename: str) -> bool:
+  with open(filename, "rb") as f:
+    return f.read(2) == b"#!"
+
+
+def check_shebang_scripts_are_executable(filenames: list[str]) -> int:
+  failed = False
+  for mode, filename in staged_modes(filenames):
+    if mode != "100755" and has_shebang(filename):
+      quoted = shlex.quote(filename)
+      print("\n".join((
+        f"{filename}: has a shebang but is not marked executable!",
+        f"  If it is supposed to be executable, try: `chmod +x {quoted}`",
+        "  If it is not supposed to be executable, double-check its shebang is wanted.\n",
+      )), file=sys.stderr)
+      failed = True
+
+  return int(failed)
+
+
+def main() -> int:
+  parser = argparse.ArgumentParser(description="Check that tracked files with shebangs are executable.")
+  parser.add_argument("filenames", nargs="*")
+  args = parser.parse_args()
+  return check_shebang_scripts_are_executable(args.filenames)
+
+
+if __name__ == "__main__":
+  raise SystemExit(main())