1 files changed, 24 insertions, 0 deletions
diff --git a/pre_commit_hooks/check_byte_order_marker.py b/pre_commit_hooks/check_byte_order_marker.py
new file mode 100644
index 0000000..59cc561
--- /dev/null
+++ b/pre_commit_hooks/check_byte_order_marker.py
@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+import argparse
+from typing import Sequence
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('filenames', nargs='*', help='Filenames to check')
+    args = parser.parse_args(argv)
+
+    retv = 0
+
+    for filename in args.filenames:
+        with open(filename, 'rb') as f:
+            if f.read(3) == b'\xef\xbb\xbf':
+                retv = 1
+                print(f'{filename}: Has a byte-order marker')
+
+    return retv
+
+
+if __name__ == '__main__':
+    raise SystemExit(main())