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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,128 @@ | ||
#!/usr/bin/env python | ||
# | ||
#===- clang-format-diff.py - ClangFormat Diff Reformatter ----*- python -*--===# | ||
# | ||
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
# See https://llvm.org/LICENSE.txt for license information. | ||
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
# | ||
#===------------------------------------------------------------------------===# | ||
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r""" | ||
ClangFormat Diff Reformatter | ||
============================ | ||
This script reads input from a unified diff and reformats all the changed | ||
lines. This is useful to reformat all the lines touched by a specific patch. | ||
Example usage for git/svn users: | ||
git diff -U0 --no-color HEAD^ | clang-format-diff.py -p1 -i | ||
svn diff --diff-cmd=diff -x-U0 | clang-format-diff.py -i | ||
""" | ||
from __future__ import absolute_import, division, print_function | ||
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import argparse | ||
import difflib | ||
import re | ||
import subprocess | ||
import sys | ||
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if sys.version_info.major >= 3: | ||
from io import StringIO | ||
else: | ||
from io import BytesIO as StringIO | ||
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def main(): | ||
parser = argparse.ArgumentParser(description= | ||
'Reformat changed lines in diff. Without -i ' | ||
'option just output the diff that would be ' | ||
'introduced.') | ||
parser.add_argument('-i', action='store_true', default=False, | ||
help='apply edits to files instead of displaying a diff') | ||
parser.add_argument('-p', metavar='NUM', default=0, | ||
help='strip the smallest prefix containing P slashes') | ||
parser.add_argument('-regex', metavar='PATTERN', default=None, | ||
help='custom pattern selecting file paths to reformat ' | ||
'(case sensitive, overrides -iregex)') | ||
parser.add_argument('-iregex', metavar='PATTERN', default= | ||
r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hpp|m|mm|inc|js|ts|proto' | ||
r'|protodevel|java)', | ||
help='custom pattern selecting file paths to reformat ' | ||
'(case insensitive, overridden by -regex)') | ||
parser.add_argument('-sort-includes', action='store_true', default=False, | ||
help='let clang-format sort include blocks') | ||
parser.add_argument('-v', '--verbose', action='store_true', | ||
help='be more verbose, ineffective without -i') | ||
parser.add_argument('-style', | ||
help='formatting style to apply (LLVM, Google, Chromium, ' | ||
'Mozilla, WebKit)') | ||
parser.add_argument('-binary', default='clang-format', | ||
help='location of binary to use for clang-format') | ||
args = parser.parse_args() | ||
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# Extract changed lines for each file. | ||
filename = None | ||
lines_by_file = {} | ||
for line in sys.stdin: | ||
match = re.search(r'^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line) | ||
if match: | ||
filename = match.group(2) | ||
if filename == None: | ||
continue | ||
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if args.regex is not None: | ||
if not re.match('^%s$' % args.regex, filename): | ||
continue | ||
else: | ||
if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE): | ||
continue | ||
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match = re.search(r'^@@.*\+(\d+)(,(\d+))?', line) | ||
if match: | ||
start_line = int(match.group(1)) | ||
line_count = 1 | ||
if match.group(3): | ||
line_count = int(match.group(3)) | ||
if line_count == 0: | ||
continue | ||
end_line = start_line + line_count - 1 | ||
lines_by_file.setdefault(filename, []).extend( | ||
['-lines', str(start_line) + ':' + str(end_line)]) | ||
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# Reformat files containing changes in place. | ||
for filename, lines in lines_by_file.items(): | ||
if args.i and args.verbose: | ||
print('Formatting {}'.format(filename)) | ||
command = [args.binary, filename] | ||
if args.i: | ||
command.append('-i') | ||
if args.sort_includes: | ||
command.append('-sort-includes') | ||
command.extend(lines) | ||
if args.style: | ||
command.extend(['-style', args.style]) | ||
p = subprocess.Popen(command, | ||
stdout=subprocess.PIPE, | ||
stderr=None, | ||
stdin=subprocess.PIPE, | ||
universal_newlines=True) | ||
stdout, stderr = p.communicate() | ||
if p.returncode != 0: | ||
sys.exit(p.returncode) | ||
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if not args.i: | ||
with open(filename) as f: | ||
code = f.readlines() | ||
formatted_code = StringIO(stdout).readlines() | ||
diff = difflib.unified_diff(code, formatted_code, | ||
filename, filename, | ||
'(before formatting)', '(after formatting)') | ||
diff_string = ''.join(diff) | ||
if len(diff_string) > 0: | ||
sys.stdout.write(diff_string) | ||
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if __name__ == '__main__': | ||
main() | ||
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