1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#!/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 getOffsetLength(filename, line_number, line_count):
"""
Calculates the field offset and length based on line number and count.
"""
offset = 0
length = 0
with open(filename, 'r') as f:
for line in f:
if line_number > 1:
offset += len(line)
line_number -= 1
elif line_count > 0:
length += len(line)
line_count -= 1
else:
break
return offset, length
def formatRange(r, style):
"""
Formats range 'r' according to style 'style'.
"""
filename, line_number, line_count = r
# FIXME: Add other types containing C++/ObjC code.
if not (filename.endswith(".cpp") or filename.endswith(".cc") or
filename.endswith(".h")):
return
offset, length = getOffsetLength(filename, line_number, line_count)
with open(filename, 'r') as f:
text = f.read()
command = [binary, '-offset', str(offset), '-length', str(length)]
if style:
command.extend(['-style', style])
p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
stdout, stderr = p.communicate(input=text)
if stderr:
print stderr
return
if not stdout:
print 'Segfault occurred while formatting', filename
print 'Please report a bug on llvm.org/bugs.'
return
with open(filename, 'w') as f:
f.write(stdout)
def main():
parser = argparse.ArgumentParser(description=
'Reformat changed lines in diff')
parser.add_argument('-p', default=1,
help='strip the smallest prefix containing P slashes')
parser.add_argument('-style',
help='formatting style to apply (LLVM, Google, Chromium)')
args = parser.parse_args()
filename = None
ranges = []
for line in sys.stdin:
match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
if match:
filename = match.group(2)
if filename == None:
continue
match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
if match:
line_count = 1
if match.group(3):
line_count = int(match.group(3))
ranges.append((filename, int(match.group(1)), line_count))
# Reverse the ranges so that the reformatting does not influence file offsets.
for r in reversed(ranges):
# Do the actual formatting.
formatRange(r, args.style)
if __name__ == '__main__':
main()
|
