forked from OSchip/llvm-project
109 lines
3.3 KiB
Python
Executable File
109 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python
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#
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#===- clang-format-diff.py - ClangFormat Diff Reformatter ----*- python -*--===#
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#
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# The LLVM Compiler Infrastructure
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#
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# This file is distributed under the University of Illinois Open Source
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# License. See LICENSE.TXT for details.
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#
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#===------------------------------------------------------------------------===#
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r"""
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ClangFormat Diff Reformatter
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============================
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This script reads input from a unified diff and reformats all the changed
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lines. This is useful to reformat all the lines touched by a specific patch.
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Example usage for git users:
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git diff -U0 HEAD^ | clang-format-diff.py -p1 -i
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"""
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import argparse
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import difflib
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import re
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import string
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import subprocess
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import StringIO
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import sys
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# Change this to the full path if clang-format is not on the path.
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binary = 'clang-format'
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def main():
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parser = argparse.ArgumentParser(description=
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'Reformat changed lines in diff. Without -i '
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'option just output the diff that would be'
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'introduced.')
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parser.add_argument('-i', action='store_true', default=False,
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help='apply edits to files instead of displaying a diff')
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parser.add_argument('-p', default=0,
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help='strip the smallest prefix containing P slashes')
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parser.add_argument(
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'-style',
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help=
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'formatting style to apply (LLVM, Google, Chromium, Mozilla, WebKit)')
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args = parser.parse_args()
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# Extract changed lines for each file.
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filename = None
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lines_by_file = {}
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for line in sys.stdin:
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match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
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if match:
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filename = match.group(2)
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if filename == None:
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continue
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# FIXME: Add other types containing C++/ObjC code.
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if not (filename.endswith(".cpp") or filename.endswith(".cc") or
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filename.endswith(".h")):
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continue
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match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
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if match:
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start_line = int(match.group(1))
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line_count = 1
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if match.group(3):
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line_count = int(match.group(3))
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if line_count == 0:
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continue
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end_line = start_line + line_count - 1;
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lines_by_file.setdefault(filename, []).extend(
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['-lines', str(start_line) + ':' + str(end_line)])
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# Reformat files containing changes in place.
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for filename, lines in lines_by_file.iteritems():
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command = [binary, filename]
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if args.i:
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command.append('-i')
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command.extend(lines)
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if args.style:
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command.extend(['-style', args.style])
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p = subprocess.Popen(command, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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stdin=subprocess.PIPE)
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stdout, stderr = p.communicate()
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if stderr:
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print stderr
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if p.returncode != 0:
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sys.exit(p.returncode);
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if not args.i:
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with open(filename) as f:
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code = f.readlines()
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formatted_code = StringIO.StringIO(stdout).readlines()
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diff = difflib.unified_diff(code, formatted_code,
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filename, filename,
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'(before formatting)', '(after formatting)')
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diff_string = string.join(diff, '')
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if len(diff_string) > 0:
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print diff_string
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if __name__ == '__main__':
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main()
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