moonfire-nvr/.github/workflows/check-license.py
Scott Lamb c547a49ac8 shorten per-file copyright headers
I'm tired of all the boilerplate, so use the new
GPL-3.0-linking-exception license identifier instead in all the server
components.

I left the ui stuff alone because I'm just going to replace it (#111).

Add a checker for the header because it's easy to forget.
2021-02-17 15:39:17 -08:00

69 lines
1.9 KiB
Python
Executable File

#!/usr/bin/env python3
# This file is part of Moonfire NVR, a security camera network video recorder.
# Copyright (C) 2021 The Moonfire NVR Authors; see AUTHORS and LICENSE.txt.
# SPDX-License-Identifier: GPL-v3.0-or-later WITH GPL-3.0-linking-exception.
"""Checks that expected header lines are present.
Call in either of two modes:
has-license.py FILE [...]
check if all files with certain extensions have expected lines.
This is useful in a CI action.
has-license.py
check if stdin has expected lines.
This is useful in a pre-commit hook, as in
git-format-staged --no-write --formatter '.../has-license.py' '*.rs'
"""
import re
import sys
# Filenames matching this regexp are expected to have the header lines.
FILENAME_MATCHER = re.compile(r'.*\.(py|rs|sh|sql)$')
MAX_LINE_COUNT = 10
EXPECTED_LINES = [
re.compile(r'This file is part of Moonfire NVR, a security camera network video recorder\.'),
re.compile(r'Copyright \(C\) 20\d{2} The Moonfire NVR Authors; see AUTHORS and LICENSE\.txt\.'),
re.compile(r'SPDX-License-Identifier: GPL-v3\.0-or-later WITH GPL-3\.0-linking-exception\.'),
]
def has_license(f):
"""Returns if all of EXPECTED_LINES are present within the first
MAX_LINE_COUNT lines of f."""
needed = set(EXPECTED_LINES)
i = 0
for line in f:
if i == 10:
break
i += 1
for e in needed:
if e.search(line):
needed.remove(e)
break
if not needed:
return True
return False
def file_has_license(filename):
with open(filename, 'r') as f:
return has_license(f)
def main(args):
if not args:
sys.exit(0 if has_license(sys.stdin) else 1)
missing = [f for f in args
if FILENAME_MATCHER.match(f) and not file_has_license(f)]
if missing:
print('The following files are missing expected copyright/license headers:')
print('\n'.join(missing))
sys.exit(1)
if __name__ == '__main__':
main(sys.argv[1:])