diff options
| -rwxr-xr-x | contrib/devtools/clang-format-diff.py | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/contrib/devtools/clang-format-diff.py b/contrib/devtools/clang-format-diff.py new file mode 100755 index 0000000000..9e02bb0938 --- /dev/null +++ b/contrib/devtools/clang-format-diff.py @@ -0,0 +1,124 @@ +#!/usr/bin/env 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/svn users: + + git diff -U0 HEAD^ | clang-format-diff.py -p1 -i + svn diff --diff-cmd=diff -x-U0 | clang-format-diff.py -i + +""" + +import argparse +import difflib +import re +import string +import subprocess +import StringIO +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. 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)') + 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 + + 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 + + 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(): + if args.i and args.verbose: + print 'Formatting', filename + command = [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) + stdout, stderr = p.communicate() + if p.returncode != 0: + sys.exit(p.returncode); + + if not args.i: + with open(filename) as f: + code = f.readlines() + formatted_code = StringIO.StringIO(stdout).readlines() + diff = difflib.unified_diff(code, formatted_code, + filename, filename, + '(before formatting)', '(after formatting)') + diff_string = string.join(diff, '') + if len(diff_string) > 0: + sys.stdout.write(diff_string) + +if __name__ == '__main__': + main() |