| #!/usr/bin/python |
| # |
| #===- clang-format-diff.py - ClangFormat Diff Reformatter ----*- python -*--===# |
| # |
| # The LLVM Compiler Infrastructure |
| # |
| # This file is distributed under the University of Illinois Open Source |
| # License. See LICENSE.TXT for details. |
| # |
| #===------------------------------------------------------------------------===# |
| |
| 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 users: |
| |
| git diff -U0 HEAD^ | clang-format-diff.py -p1 |
| |
| """ |
| |
| import argparse |
| import re |
| import subprocess |
| import sys |
| |
| |
| # Change this to the full path if clang-format is not on the path. |
| binary = 'clang-format' |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser(description= |
| 'Reformat changed lines in diff.') |
| parser.add_argument('-p', default=0, |
| help='strip the smallest prefix containing P slashes') |
| parser.add_argument( |
| '-style', |
| help= |
| 'formatting style to apply (LLVM, Google, Chromium, Mozilla, WebKit)') |
| args = parser.parse_args() |
| |
| # Extract changed lines for each file. |
| filename = None |
| lines_by_file = {} |
| for line in sys.stdin: |
| match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line) |
| if match: |
| filename = match.group(2) |
| if filename == None: |
| continue |
| |
| # FIXME: Add other types containing C++/ObjC code. |
| if not (filename.endswith(".cpp") or filename.endswith(".cc") or |
| filename.endswith(".h")): |
| continue |
| |
| match = re.search('^@@.*\+(\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)]) |
| |
| # Reformat files containing changes in place. |
| for filename, lines in lines_by_file.iteritems(): |
| command = [binary, '-i', filename] |
| command.extend(lines) |
| if args.style: |
| command.extend(['-style', args.style]) |
| p = subprocess.Popen(command, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, |
| stdin=subprocess.PIPE) |
| stdout, stderr = p.communicate() |
| if stderr: |
| print stderr |
| if p.returncode != 0: |
| sys.exit(p.returncode); |
| |
| |
| if __name__ == '__main__': |
| main() |