summaryrefslogtreecommitdiffstats
path: root/third_party/waf/waflib/extras/cpplint.py
blob: afc09c9472ca40647fec2304233d28f3ba383302 (plain)
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
#! /usr/bin/env python
# encoding: utf-8
#
# written by Sylvain Rouquette, 2014

'''

This is an extra tool, not bundled with the default waf binary.
To add the cpplint tool to the waf file:
$ ./waf-light --tools=compat15,cpplint

this tool also requires cpplint for python.
If you have PIP, you can install it like this: pip install cpplint

When using this tool, the wscript will look like:

    def options(opt):
        opt.load('compiler_cxx cpplint')

    def configure(conf):
        conf.load('compiler_cxx cpplint')
        # optional, you can also specify them on the command line
        conf.env.CPPLINT_FILTERS = ','.join((
            '-whitespace/newline',      # c++11 lambda
            '-readability/braces',      # c++11 constructor
            '-whitespace/braces',       # c++11 constructor
            '-build/storage_class',     # c++11 for-range
            '-whitespace/blank_line',   # user pref
            '-whitespace/labels'        # user pref
            ))

    def build(bld):
        bld(features='cpplint', source='main.cpp', target='app')
        # add include files, because they aren't usually built
        bld(features='cpplint', source=bld.path.ant_glob('**/*.hpp'))
'''

from __future__ import absolute_import
import sys, re
import logging
from waflib import Errors, Task, TaskGen, Logs, Options, Node, Utils


critical_errors = 0
CPPLINT_FORMAT = '[CPPLINT] %(filename)s:\nline %(linenum)s, severity %(confidence)s, category: %(category)s\n%(message)s\n'
RE_EMACS = re.compile(r'(?P<filename>.*):(?P<linenum>\d+):  (?P<message>.*)  \[(?P<category>.*)\] \[(?P<confidence>\d+)\]')
CPPLINT_RE = {
    'waf': RE_EMACS,
    'emacs': RE_EMACS,
    'vs7': re.compile(r'(?P<filename>.*)\((?P<linenum>\d+)\):  (?P<message>.*)  \[(?P<category>.*)\] \[(?P<confidence>\d+)\]'),
    'eclipse': re.compile(r'(?P<filename>.*):(?P<linenum>\d+): warning: (?P<message>.*)  \[(?P<category>.*)\] \[(?P<confidence>\d+)\]'),
}
CPPLINT_STR = ('${CPPLINT} '
               '--verbose=${CPPLINT_LEVEL} '
               '--output=${CPPLINT_OUTPUT} '
               '--filter=${CPPLINT_FILTERS} '
               '--root=${CPPLINT_ROOT} '
               '--linelength=${CPPLINT_LINE_LENGTH} ')


def options(opt):
    opt.add_option('--cpplint-filters', type='string',
                   default='', dest='CPPLINT_FILTERS',
                   help='add filters to cpplint')
    opt.add_option('--cpplint-length', type='int',
                   default=80, dest='CPPLINT_LINE_LENGTH',
                   help='specify the line length (default: 80)')
    opt.add_option('--cpplint-level', default=1, type='int', dest='CPPLINT_LEVEL',
                   help='specify the log level (default: 1)')
    opt.add_option('--cpplint-break', default=5, type='int', dest='CPPLINT_BREAK',
                   help='break the build if error >= level (default: 5)')
    opt.add_option('--cpplint-root', type='string',
                   default='', dest='CPPLINT_ROOT',
                   help='root directory used to derive header guard')
    opt.add_option('--cpplint-skip', action='store_true',
                   default=False, dest='CPPLINT_SKIP',
                   help='skip cpplint during build')
    opt.add_option('--cpplint-output', type='string',
                   default='waf', dest='CPPLINT_OUTPUT',
                   help='select output format (waf, emacs, vs7, eclipse)')


def configure(conf):
    try:
        conf.find_program('cpplint', var='CPPLINT')
    except Errors.ConfigurationError:
        conf.env.CPPLINT_SKIP = True


class cpplint_formatter(Logs.formatter, object):
    def __init__(self, fmt):
        logging.Formatter.__init__(self, CPPLINT_FORMAT)
        self.fmt = fmt

    def format(self, rec):
        if self.fmt == 'waf':
            result = CPPLINT_RE[self.fmt].match(rec.msg).groupdict()
            rec.msg = CPPLINT_FORMAT % result
        if rec.levelno <= logging.INFO:
            rec.c1 = Logs.colors.CYAN
        return super(cpplint_formatter, self).format(rec)


class cpplint_handler(Logs.log_handler, object):
    def __init__(self, stream=sys.stderr, **kw):
        super(cpplint_handler, self).__init__(stream, **kw)
        self.stream = stream

    def emit(self, rec):
        rec.stream = self.stream
        self.emit_override(rec)
        self.flush()


class cpplint_wrapper(object):
    def __init__(self, logger, threshold, fmt):
        self.logger = logger
        self.threshold = threshold
        self.fmt = fmt

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        if isinstance(exc_value, Utils.subprocess.CalledProcessError):
            messages = [m for m in exc_value.output.splitlines() 
                        if 'Done processing' not in m 
                        and 'Total errors found' not in m]
            for message in messages:
                self.write(message)
            return True

    def write(self, message):
        global critical_errors
        result = CPPLINT_RE[self.fmt].match(message)
        if not result:
            return
        level = int(result.groupdict()['confidence'])
        if level >= self.threshold:
            critical_errors += 1
        if level <= 2:
            self.logger.info(message)
        elif level <= 4:
            self.logger.warning(message)
        else:
            self.logger.error(message)


cpplint_logger = None
def get_cpplint_logger(fmt):
    global cpplint_logger
    if cpplint_logger:
        return cpplint_logger
    cpplint_logger = logging.getLogger('cpplint')
    hdlr = cpplint_handler()
    hdlr.setFormatter(cpplint_formatter(fmt))
    cpplint_logger.addHandler(hdlr)
    cpplint_logger.setLevel(logging.DEBUG)
    return cpplint_logger


class cpplint(Task.Task):
    color = 'PINK'

    def __init__(self, *k, **kw):
        super(cpplint, self).__init__(*k, **kw)

    def run(self):
        global critical_errors
        with cpplint_wrapper(get_cpplint_logger(self.env.CPPLINT_OUTPUT), self.env.CPPLINT_BREAK, self.env.CPPLINT_OUTPUT):
            params = {key: str(self.env[key]) for key in self.env if 'CPPLINT_' in key}
            if params['CPPLINT_OUTPUT'] == 'waf':
                params['CPPLINT_OUTPUT'] = 'emacs'
            params['CPPLINT'] = self.env.get_flat('CPPLINT')
            cmd = Utils.subst_vars(CPPLINT_STR, params)
            env = self.env.env or None
            Utils.subprocess.check_output(cmd + self.inputs[0].abspath(),
                                          stderr=Utils.subprocess.STDOUT,
                                          env=env, shell=True)
        return critical_errors

@TaskGen.extension('.h', '.hh', '.hpp', '.hxx')
def cpplint_includes(self, node):
    pass

@TaskGen.feature('cpplint')
@TaskGen.before_method('process_source')
def post_cpplint(self):
    if not self.env.CPPLINT_INITIALIZED:
        for key, value in Options.options.__dict__.items():
            if not key.startswith('CPPLINT_') or self.env[key]:
                continue
            self.env[key] = value
        self.env.CPPLINT_INITIALIZED = True

    if self.env.CPPLINT_SKIP:
        return

    if not self.env.CPPLINT_OUTPUT in CPPLINT_RE:
        return

    for src in self.to_list(getattr(self, 'source', [])):
        if isinstance(src, Node.Node):
            node = src
        else:
            node = self.path.find_or_declare(src)
        if not node:
            self.bld.fatal('Could not find %r' % src)
        self.create_task('cpplint', node)