197 lines
7.1 KiB
Python
Executable File
197 lines
7.1 KiB
Python
Executable File
#!/usr/bin/env python3
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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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#
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# Slightly modified to handle the definition of functions, which do not
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# require a space before the parenthesis
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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/svn users:
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git diff -U0 --no-color HEAD^ | clang-format-diff.py -p1 -i
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svn diff --diff-cmd=diff -x-U0 | clang-format-diff.py -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 subprocess
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import sys
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import tempfile
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import os
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from functools import reduce
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try:
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from StringIO import StringIO
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except ImportError:
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from io import StringIO
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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. Use something like: '
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'git diff master..my-branch | ./sys/clang-format-diff.py -p1 -i')
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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', metavar='NUM', default=0,
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help='strip the smallest prefix containing P slashes')
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parser.add_argument('-regex', metavar='PATTERN', default=None,
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help='custom pattern selecting file paths to reformat '
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'(case sensitive, overrides -iregex)')
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parser.add_argument('-iregex', metavar='PATTERN', default=
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r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hpp|m|mm|inc|js|ts|proto'
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r'|protodevel|java)',
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help='custom pattern selecting file paths to reformat '
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'(case insensitive, overridden by -regex)')
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parser.add_argument('-sort-includes', action='store_true', default=False,
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help='let clang-format sort include blocks')
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parser.add_argument('-v', '--verbose', action='store_true',
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help='be more verbose, ineffective without -i')
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parser.add_argument('--debug', action='store_true',
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help='debug mode')
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parser.add_argument('-style',
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help='formatting style to apply (LLVM, Google, Chromium, '
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'Mozilla, WebKit)')
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parser.add_argument('-binary', default='clang-format',
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help='location of binary to use for clang-format')
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args = parser.parse_args()
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def debug(s):
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if args.debug:
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sys.stderr.write(str(s) + '\n')
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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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input = sys.stdin.read().split('\n')
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for lineidx, line in enumerate(input):
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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 is None:
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continue
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if args.regex is not None:
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if not re.match('^%s$' % args.regex, filename):
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continue
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else:
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if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
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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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range_start, range_end = None, None
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range_line = -1
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debug(line_count)
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i = 0
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while True:
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# stop iterating when finding the next diff
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if lineidx + i >= len(input):
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break
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debug('lineidx : ' + input[lineidx + i])
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# do not count lines that are removed
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if not input[lineidx + i].startswith('-'):
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range_line += 1
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if input[lineidx + i].startswith('+'):
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if range_start is None:
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range_start = start_line + range_line
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debug('set range_start: ' + str(start_line + range_line))
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elif range_start is not None and range_end is None:
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range_end = start_line + range_line
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debug('set range_end: ' + str(start_line + range_line))
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lines_by_file.setdefault(filename, []).append([range_start, range_end - 1])
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range_start, range_end = None, None
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if input[lineidx + i].startswith('diff'):
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break
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i += 1
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# Reformat files containing changes in place.
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for filename, lines in lines_by_file.items():
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debug('%s: %s' % (filename,lines))
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command = [args.binary, filename]
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if args.sort_includes:
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command.append('-sort-includes')
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if lines:
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s = [('-lines', str(x[0]) + ':' + str(x[1])) for x in lines]
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s = reduce(lambda x, y: x + y, s)
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command.extend(s)
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if args.style:
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command.extend(['-style', args.style])
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p = subprocess.Popen(command,
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stdout=subprocess.PIPE,
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stderr=None,
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stdin=subprocess.PIPE,
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universal_newlines=True)
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stdout, stderr = p.communicate()
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if p.returncode != 0:
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sys.exit(p.returncode)
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with open(filename) as f:
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code = f.readlines()
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formatted_code = StringIO(stdout).readlines()
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modified_lines = dict()
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if lines:
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for x in lines:
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for i in range(x[0], x[1] + 1):
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modified_lines[i] = True
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delta = 10
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# handle functions definitions/declarations: do not use space before (
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for i, l in enumerate(formatted_code):
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if modified_lines and not any(map(lambda x: x in modified_lines, range(i + 1 - delta, i + 1 + delta))):
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continue
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debug('formatted_code: ' + formatted_code[i])
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if formatted_code[i].startswith('R_API ') or formatted_code[i].startswith('static ') or formatted_code[i].startswith('R_IPI '):
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formatted_code[i] = formatted_code[i].replace(' (', '(')
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formatted_code[i] = formatted_code[i].replace('Elf_ (', 'Elf_(')
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while ' ? ' in formatted_code[i] and ' : ' in formatted_code[i]:
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pos_q = formatted_code[i].index(' ? ')
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pos_c = formatted_code[i].index(' : ')
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if pos_q >= pos_c:
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break
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formatted_code[i] = formatted_code[i].replace(' ? ', '? ', 1)
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formatted_code[i] = formatted_code[i].replace(' : ', ': ', 1)
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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 = ''.join(diff)
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if len(diff_string) > 0:
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if args.i:
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f = tempfile.NamedTemporaryFile(delete=False)
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f.write(diff_string.encode())
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f.close()
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os.system('git apply -p0 < "%s"' % (f.name))
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os.unlink(f.name)
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else:
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sys.stdout.write(diff_string)
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if __name__ == '__main__':
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main()
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