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import argparse
import os
from typing import Optional
from typing import Sequence
from pre_commit_hooks.util import cmd_output
def main(argv: Optional[Sequence[str]] = None) -> int:
parser = argparse.ArgumentParser()
parser.add_argument('filenames', nargs='*')
args = parser.parse_args(argv)
if (
'PRE_COMMIT_FROM_REF' in os.environ and
'PRE_COMMIT_TO_REF' in os.environ
):
diff_arg = '...'.join((
os.environ['PRE_COMMIT_FROM_REF'],
os.environ['PRE_COMMIT_TO_REF'],
))
else:
diff_arg = '--staged'
added_diff = cmd_output(
'git', 'diff', '--diff-filter=A', '--raw', diff_arg, '--',
*args.filenames,
)
retv = 0
for line in added_diff.splitlines():
metadata, filename = line.split('\t', 1)
new_mode = metadata.split(' ')[1]
if new_mode == '160000':
print(f'{filename}: new submodule introduced')
retv = 1
if retv:
print()
print('This commit introduces new submodules.')
print('Did you unintentionally `git add .`?')
print('To fix: git rm {thesubmodule} # no trailing slash')
print('Also check .gitmodules')
return retv
if __name__ == '__main__':
raise SystemExit(main())
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