SPIRV-Tools/utils/check_copyright.py

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#!/usr/bin/env python3
# coding=utf-8
# Copyright (c) 2016 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Checks for copyright notices in all the files that need them under the
current directory. Optionally insert them. When inserting, replaces
an MIT or Khronos free use license with Apache 2.
"""
import argparse
import fileinput
import fnmatch
import inspect
import os
import re
import sys
# List of designated copyright owners.
AUTHORS = ['The Khronos Group Inc.',
'LunarG Inc.',
'Google Inc.',
'Google LLC',
'Pierre Moreau',
'Samsung Inc',
'André Perez Maselco',
'Vasyl Teliman',
'Advanced Micro Devices, Inc.',
'Stefano Milizia',
'Alastair F. Donaldson',
'Mostafa Ashraf',
'Shiyu Liu',
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'ZHOU He',
'Nintendo',
'Epic Games, Inc.']
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CURRENT_YEAR = 2023
FIRST_YEAR = 2014
FINAL_YEAR = CURRENT_YEAR + 5
# A regular expression to match the valid years in the copyright information.
YEAR_REGEX = '(' + '|'.join(
str(year) for year in range(FIRST_YEAR, FINAL_YEAR + 1)) + ')'
# A regular expression to make a range of years in the form <year1>-<year2>.
YEAR_RANGE_REGEX = '('
for year1 in range(FIRST_YEAR, FINAL_YEAR + 1):
for year2 in range(year1 + 1, FINAL_YEAR + 1):
YEAR_RANGE_REGEX += str(year1) + '-' + str(year2) + '|'
YEAR_RANGE_REGEX = YEAR_RANGE_REGEX[:-1] + ')'
# In the copyright info, the year can be a single year or a range. This is a
# regex to make sure it matches one of them.
YEAR_OR_RANGE_REGEX = '(' + YEAR_REGEX + '|' + YEAR_RANGE_REGEX + ')'
# The final regular expression to match a valid copyright line.
COPYRIGHT_RE = re.compile('Copyright \(c\) {} ({})'.format(
YEAR_OR_RANGE_REGEX, '|'.join(AUTHORS)))
MIT_BEGIN_RE = re.compile('Permission is hereby granted, '
'free of charge, to any person obtaining a')
MIT_END_RE = re.compile('MATERIALS OR THE USE OR OTHER DEALINGS IN '
'THE MATERIALS.')
APACHE2_BEGIN_RE = re.compile('Licensed under the Apache License, '
'Version 2.0 \(the "License"\);')
APACHE2_END_RE = re.compile('limitations under the License.')
LICENSED = """Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License."""
LICENSED_LEN = 10 # Number of lines in LICENSED
def find(top, filename_glob, skip_glob_dir_list, skip_glob_files_list):
"""Returns files in the tree rooted at top matching filename_glob but not
in directories matching skip_glob_dir_list nor files matching
skip_glob_dir_list."""
file_list = []
for path, dirs, files in os.walk(top):
for glob in skip_glob_dir_list:
for match in fnmatch.filter(dirs, glob):
dirs.remove(match)
for filename in fnmatch.filter(files, filename_glob):
full_file = os.path.join(path, filename)
if full_file not in skip_glob_files_list:
file_list.append(full_file)
return file_list
def filtered_descendants(glob):
"""Returns glob-matching filenames under the current directory, but skips
some irrelevant paths."""
return find('.', glob, ['third_party', 'external', 'CompilerIdCXX',
'build*', 'out*'], ['./utils/clang-format-diff.py'])
def skip(line):
"""Returns true if line is all whitespace or shebang."""
stripped = line.lstrip()
return stripped == '' or stripped.startswith('#!')
def comment(text, prefix):
"""Returns commented-out text.
Each line of text will be prefixed by prefix and a space character. Any
trailing whitespace will be trimmed.
"""
accum = ['{} {}'.format(prefix, line).rstrip() for line in text.split('\n')]
return '\n'.join(accum)
def insert_copyright(author, glob, comment_prefix):
"""Finds all glob-matching files under the current directory and inserts the
copyright message, and license notice. An MIT license or Khronos free
use license (modified MIT) is replaced with an Apache 2 license.
The copyright message goes into the first non-whitespace, non-shebang line
in a file. The license notice follows it. Both are prefixed on each line
by comment_prefix and a space.
"""
copyright = comment('Copyright (c) {} {}'.format(CURRENT_YEAR, author),
comment_prefix) + '\n\n'
licensed = comment(LICENSED, comment_prefix) + '\n\n'
for file in filtered_descendants(glob):
# Parsing states are:
# 0 Initial: Have not seen a copyright declaration.
# 1 Seen a copyright line and no other interesting lines
# 2 In the middle of an MIT or Khronos free use license
# 9 Exited any of the above
state = 0
update_file = False
for line in fileinput.input(file, inplace=1):
emit = True
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if state == 0:
if COPYRIGHT_RE.search(line):
state = 1
elif skip(line):
pass
else:
# Didn't see a copyright. Inject copyright and license.
sys.stdout.write(copyright)
sys.stdout.write(licensed)
# Assume there isn't a previous license notice.
state = 1
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elif state == 1:
if MIT_BEGIN_RE.search(line):
state = 2
emit = False
elif APACHE2_BEGIN_RE.search(line):
# Assume an Apache license is preceded by a copyright
# notice. So just emit it like the rest of the file.
state = 9
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elif state == 2:
# Replace the MIT license with Apache 2
emit = False
if MIT_END_RE.search(line):
state = 9
sys.stdout.write(licensed)
if emit:
sys.stdout.write(line)
def alert_if_no_copyright(glob, comment_prefix):
"""Prints names of all files missing either a copyright or Apache 2 license.
Finds all glob-matching files under the current directory and checks if they
contain the copyright message and license notice. Prints the names of all the
files that don't meet both criteria.
Returns the total number of file names printed.
"""
printed_count = 0
for file in filtered_descendants(glob):
has_copyright = False
has_apache2 = False
line_num = 0
apache_expected_end = 0
with open(file, encoding='utf-8') as contents:
for line in contents:
line_num += 1
if COPYRIGHT_RE.search(line):
has_copyright = True
if APACHE2_BEGIN_RE.search(line):
apache_expected_end = line_num + LICENSED_LEN
if (line_num is apache_expected_end) and APACHE2_END_RE.search(line):
has_apache2 = True
if not (has_copyright and has_apache2):
message = file
if not has_copyright:
message += ' has no copyright'
if not has_apache2:
message += ' has no Apache 2 license notice'
print(message)
printed_count += 1
return printed_count
class ArgParser(argparse.ArgumentParser):
def __init__(self):
super(ArgParser, self).__init__(
description=inspect.getdoc(sys.modules[__name__]))
self.add_argument('--update', dest='author', action='store',
help='For files missing a copyright notice, insert '
'one for the given author, and add a license '
'notice. The author must be in the AUTHORS '
'list in the script.')
def main():
glob_comment_pairs = [('*.h', '//'), ('*.hpp', '//'), ('*.sh', '#'),
('*.py', '#'), ('*.cpp', '//'),
('CMakeLists.txt', '#')]
argparser = ArgParser()
args = argparser.parse_args()
if args.author:
if args.author not in AUTHORS:
print('error: --update argument must be in the AUTHORS list in '
'check_copyright.py: {}'.format(AUTHORS))
sys.exit(1)
for pair in glob_comment_pairs:
insert_copyright(args.author, *pair)
sys.exit(0)
else:
count = sum([alert_if_no_copyright(*p) for p in glob_comment_pairs])
sys.exit(count > 0)
if __name__ == '__main__':
main()