Add types to pre-commit

pre_commit/make_archives.py

@@ -1,6 +1,8 @@
 import argparse
 import os.path
 import tarfile
+from typing import Optional
+from typing import Sequence
 
 from pre_commit import output
 from pre_commit.util import cmd_output_b
@@ -23,7 +25,7 @@ REPOS = (
 )
 
 
-def make_archive(name, repo, ref, destdir):
+def make_archive(name: str, repo: str, ref: str, destdir: str) -> str:
     """Makes an archive of a repository in the given destdir.
 
     :param text name: Name to give the archive.  For instance foo.  The file
@@ -49,7 +51,7 @@ def make_archive(name, repo, ref, destdir):
     return output_path
 
 
-def main(argv=None):
+def main(argv: Optional[Sequence[str]] = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('--dest', default='pre_commit/resources')
     args = parser.parse_args(argv)
@@ -58,6 +60,7 @@ def main(argv=None):
             f'Making {archive_name}.tar.gz for {repo}@{ref}',
         )
         make_archive(archive_name, repo, ref, args.dest)
+    return 0
 
 
 if __name__ == '__main__':