Add types to pre-commit

pre_commit/meta_hooks/check_hooks_apply.py

@@ -1,4 +1,6 @@
 import argparse
+from typing import Optional
+from typing import Sequence
 
 import pre_commit.constants as C
 from pre_commit import git
@@ -8,7 +10,7 @@ from pre_commit.repository import all_hooks
 from pre_commit.store import Store
 
 
-def check_all_hooks_match_files(config_file):
+def check_all_hooks_match_files(config_file: str) -> int:
     classifier = Classifier(git.get_all_files())
     retv = 0
 
@@ -22,7 +24,7 @@ def check_all_hooks_match_files(config_file):
     return retv
 
 
-def main(argv=None):
+def main(argv: Optional[Sequence[str]] = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', default=[C.CONFIG_FILE])
     args = parser.parse_args(argv)

pre_commit/meta_hooks/check_useless_excludes.py

@@ -1,5 +1,7 @@
 import argparse
 import re
+from typing import Optional
+from typing import Sequence
 
 from cfgv import apply_defaults
 
@@ -10,7 +12,11 @@ from pre_commit.clientlib import MANIFEST_HOOK_DICT
 from pre_commit.commands.run import Classifier
 
 
-def exclude_matches_any(filenames, include, exclude):
+def exclude_matches_any(
+        filenames: Sequence[str],
+        include: str,
+        exclude: str,
+) -> bool:
     if exclude == '^$':
         return True
     include_re, exclude_re = re.compile(include), re.compile(exclude)
@@ -20,7 +26,7 @@ def exclude_matches_any(filenames, include, exclude):
     return False
 
 
-def check_useless_excludes(config_file):
+def check_useless_excludes(config_file: str) -> int:
     config = load_config(config_file)
     classifier = Classifier(git.get_all_files())
     retv = 0
@@ -52,7 +58,7 @@ def check_useless_excludes(config_file):
     return retv
 
 
-def main(argv=None):
+def main(argv: Optional[Sequence[str]] = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', default=[C.CONFIG_FILE])
     args = parser.parse_args(argv)

pre_commit/meta_hooks/identity.py

@@ -1,12 +1,15 @@
 import sys
+from typing import Optional
+from typing import Sequence
 
 from pre_commit import output
 
 
-def main(argv=None):
+def main(argv: Optional[Sequence[str]] = None) -> int:
     argv = argv if argv is not None else sys.argv[1:]
     for arg in argv:
         output.write_line(arg)
+    return 0
 
 
 if __name__ == '__main__':