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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
#!/usr/bin/python
##
## Copyright (c) 2016, Alliance for Open Media. All rights reserved
##
## This source code is subject to the terms of the BSD 2 Clause License and
## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
## was not distributed with this source code in the LICENSE file, you can
## obtain it at www.aomedia.org/license/software. If the Alliance for Open
## Media Patent License 1.0 was not distributed with this source code in the
## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
##
"""Performs style checking on each diff hunk."""
import getopt
import os
import StringIO
import subprocess
import sys
import diff
SHORT_OPTIONS = "h"
LONG_OPTIONS = ["help"]
TOPLEVEL_CMD = ["git", "rev-parse", "--show-toplevel"]
DIFF_CMD = ["git", "diff"]
DIFF_INDEX_CMD = ["git", "diff-index", "-u", "HEAD", "--"]
SHOW_CMD = ["git", "show"]
CPPLINT_FILTERS = ["-readability/casting"]
class Usage(Exception):
pass
class SubprocessException(Exception):
def __init__(self, args):
msg = "Failed to execute '%s'"%(" ".join(args))
super(SubprocessException, self).__init__(msg)
class Subprocess(subprocess.Popen):
"""Adds the notion of an expected returncode to Popen."""
def __init__(self, args, expected_returncode=0, **kwargs):
self._args = args
self._expected_returncode = expected_returncode
super(Subprocess, self).__init__(args, **kwargs)
def communicate(self, *args, **kwargs):
result = super(Subprocess, self).communicate(*args, **kwargs)
if self._expected_returncode is not None:
try:
ok = self.returncode in self._expected_returncode
except TypeError:
ok = self.returncode == self._expected_returncode
if not ok:
raise SubprocessException(self._args)
return result
def main(argv=None):
if argv is None:
argv = sys.argv
try:
try:
opts, args = getopt.getopt(argv[1:], SHORT_OPTIONS, LONG_OPTIONS)
except getopt.error, msg:
raise Usage(msg)
# process options
for o, _ in opts:
if o in ("-h", "--help"):
print __doc__
sys.exit(0)
if args and len(args) > 1:
print __doc__
sys.exit(0)
# Find the fully qualified path to the root of the tree
tl = Subprocess(TOPLEVEL_CMD, stdout=subprocess.PIPE)
tl = tl.communicate()[0].strip()
# See if we're working on the index or not.
if args:
diff_cmd = DIFF_CMD + [args[0] + "^!"]
else:
diff_cmd = DIFF_INDEX_CMD
# Build the command line to execute cpplint
cpplint_cmd = [os.path.join(tl, "tools", "cpplint.py"),
"--filter=" + ",".join(CPPLINT_FILTERS),
"-"]
# Get a list of all affected lines
file_affected_line_map = {}
p = Subprocess(diff_cmd, stdout=subprocess.PIPE)
stdout = p.communicate()[0]
for hunk in diff.ParseDiffHunks(StringIO.StringIO(stdout)):
filename = hunk.right.filename[2:]
if filename not in file_affected_line_map:
file_affected_line_map[filename] = set()
file_affected_line_map[filename].update(hunk.right.delta_line_nums)
# Run each affected file through cpplint
lint_failed = False
for filename, affected_lines in file_affected_line_map.iteritems():
if filename.split(".")[-1] not in ("c", "h", "cc"):
continue
if args:
# File contents come from git
show_cmd = SHOW_CMD + [args[0] + ":" + filename]
show = Subprocess(show_cmd, stdout=subprocess.PIPE)
lint = Subprocess(cpplint_cmd, expected_returncode=(0, 1),
stdin=show.stdout, stderr=subprocess.PIPE)
lint_out = lint.communicate()[1]
else:
# File contents come from the working tree
lint = Subprocess(cpplint_cmd, expected_returncode=(0, 1),
stdin=subprocess.PIPE, stderr=subprocess.PIPE)
stdin = open(os.path.join(tl, filename)).read()
lint_out = lint.communicate(stdin)[1]
for line in lint_out.split("\n"):
fields = line.split(":")
if fields[0] != "-":
continue
warning_line_num = int(fields[1])
if warning_line_num in affected_lines:
print "%s:%d:%s"%(filename, warning_line_num,
":".join(fields[2:]))
lint_failed = True
# Set exit code if any relevant lint errors seen
if lint_failed:
return 1
except Usage, err:
print >>sys.stderr, err
print >>sys.stderr, "for help use --help"
return 2
if __name__ == "__main__":
sys.exit(main())
|
