summaryrefslogtreecommitdiff
path: root/third_party/waf/waflib/extras/cppcheck.py
blob: 13ff42477fd4b28403295fb57c390ff73f2d397b (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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
#! /usr/bin/env python
# -*- encoding: utf-8 -*-
# Michel Mooij, michel.mooij7@gmail.com

"""
Tool Description
================
This module provides a waf wrapper (i.e. waftool) around the C/C++ source code
checking tool 'cppcheck'.

See http://cppcheck.sourceforge.net/ for more information on the cppcheck tool
itself.
Note that many linux distributions already provide a ready to install version
of cppcheck. On fedora, for instance, it can be installed using yum:

	'sudo yum install cppcheck'


Usage
=====
In order to use this waftool simply add it to the 'options' and 'configure'
functions of your main waf script as shown in the example below:

	def options(opt):
		opt.load('cppcheck', tooldir='./waftools')

	def configure(conf):
		conf.load('cppcheck')

Note that example shown above assumes that the cppcheck waftool is located in
the sub directory named 'waftools'.

When configured as shown in the example above, cppcheck will automatically
perform a source code analysis on all C/C++ build tasks that have been
defined in your waf build system.

The example shown below for a C program will be used as input for cppcheck when
building the task.

	def build(bld):
		bld.program(name='foo', src='foobar.c')

The result of the source code analysis will be stored both as xml and html
files in the build location for the task. Should any error be detected by
cppcheck the build will be aborted and a link to the html report will be shown.
By default, one index.html file is created for each task generator. A global
index.html file can be obtained by setting the following variable
in the configuration section:

	conf.env.CPPCHECK_SINGLE_HTML = False

When needed source code checking by cppcheck can be disabled per task, per
detected error or warning for a particular task. It can be also be disabled for
all tasks.

In order to exclude a task from source code checking add the skip option to the
task as shown below:

	def build(bld):
		bld.program(
				name='foo',
				src='foobar.c'
				cppcheck_skip=True
		)

When needed problems detected by cppcheck may be suppressed using a file
containing a list of suppression rules. The relative or absolute path to this
file can be added to the build task as shown in the example below:

		bld.program(
				name='bar',
				src='foobar.c',
				cppcheck_suppress='bar.suppress'
		)

A cppcheck suppress file should contain one suppress rule per line. Each of
these rules will be passed as an '--suppress=<rule>' argument to cppcheck.

Dependencies
================
This waftool depends on the python pygments module, it is used for source code
syntax highlighting when creating the html reports. see http://pygments.org/ for
more information on this package.

Remarks
================
The generation of the html report is originally based on the cppcheck-htmlreport.py
script that comes shipped with the cppcheck tool.
"""

import sys
import xml.etree.ElementTree as ElementTree
from waflib import Task, TaskGen, Logs, Context, Options

PYGMENTS_EXC_MSG= '''
The required module 'pygments' could not be found. Please install it using your
platform package manager (e.g. apt-get or yum), using 'pip' or 'easy_install',
see 'http://pygments.org/download/' for installation instructions.
'''

try:
	import pygments
	from pygments import formatters, lexers
except ImportError as e:
	Logs.warn(PYGMENTS_EXC_MSG)
	raise e


def options(opt):
	opt.add_option('--cppcheck-skip', dest='cppcheck_skip',
		default=False, action='store_true',
		help='do not check C/C++ sources (default=False)')

	opt.add_option('--cppcheck-err-resume', dest='cppcheck_err_resume',
		default=False, action='store_true',
		help='continue in case of errors (default=False)')

	opt.add_option('--cppcheck-bin-enable', dest='cppcheck_bin_enable',
		default='warning,performance,portability,style,unusedFunction', action='store',
		help="cppcheck option '--enable=' for binaries (default=warning,performance,portability,style,unusedFunction)")

	opt.add_option('--cppcheck-lib-enable', dest='cppcheck_lib_enable',
		default='warning,performance,portability,style', action='store',
		help="cppcheck option '--enable=' for libraries (default=warning,performance,portability,style)")

	opt.add_option('--cppcheck-std-c', dest='cppcheck_std_c',
		default='c99', action='store',
		help='cppcheck standard to use when checking C (default=c99)')

	opt.add_option('--cppcheck-std-cxx', dest='cppcheck_std_cxx',
		default='c++03', action='store',
		help='cppcheck standard to use when checking C++ (default=c++03)')

	opt.add_option('--cppcheck-check-config', dest='cppcheck_check_config',
		default=False, action='store_true',
		help='forced check for missing buildin include files, e.g. stdio.h (default=False)')

	opt.add_option('--cppcheck-max-configs', dest='cppcheck_max_configs',
		default='20', action='store',
		help='maximum preprocessor (--max-configs) define iterations (default=20)')

	opt.add_option('--cppcheck-jobs', dest='cppcheck_jobs',
		default='1', action='store',
		help='number of jobs (-j) to do the checking work (default=1)')

def configure(conf):
	if conf.options.cppcheck_skip:
		conf.env.CPPCHECK_SKIP = [True]
	conf.env.CPPCHECK_STD_C = conf.options.cppcheck_std_c
	conf.env.CPPCHECK_STD_CXX = conf.options.cppcheck_std_cxx
	conf.env.CPPCHECK_MAX_CONFIGS = conf.options.cppcheck_max_configs
	conf.env.CPPCHECK_BIN_ENABLE = conf.options.cppcheck_bin_enable
	conf.env.CPPCHECK_LIB_ENABLE = conf.options.cppcheck_lib_enable
	conf.env.CPPCHECK_JOBS = conf.options.cppcheck_jobs
	if conf.options.cppcheck_jobs != '1' and ('unusedFunction' in conf.options.cppcheck_bin_enable or 'unusedFunction' in conf.options.cppcheck_lib_enable or 'all' in conf.options.cppcheck_bin_enable or 'all' in conf.options.cppcheck_lib_enable):
		Logs.warn('cppcheck: unusedFunction cannot be used with multiple threads, cppcheck will disable it automatically')
	conf.find_program('cppcheck', var='CPPCHECK')

	# set to True to get a single index.html file
	conf.env.CPPCHECK_SINGLE_HTML = False

@TaskGen.feature('c')
@TaskGen.feature('cxx')
def cppcheck_execute(self):
	if hasattr(self.bld, 'conf'):
		return
	if len(self.env.CPPCHECK_SKIP) or Options.options.cppcheck_skip:
		return
	if getattr(self, 'cppcheck_skip', False):
		return
	task = self.create_task('cppcheck')
	task.cmd = _tgen_create_cmd(self)
	task.fatal = []
	if not Options.options.cppcheck_err_resume:
		task.fatal.append('error')


def _tgen_create_cmd(self):
	features = getattr(self, 'features', [])
	std_c = self.env.CPPCHECK_STD_C
	std_cxx = self.env.CPPCHECK_STD_CXX
	max_configs = self.env.CPPCHECK_MAX_CONFIGS
	bin_enable = self.env.CPPCHECK_BIN_ENABLE
	lib_enable = self.env.CPPCHECK_LIB_ENABLE
	jobs = self.env.CPPCHECK_JOBS

	cmd  = self.env.CPPCHECK
	args = ['--inconclusive','--report-progress','--verbose','--xml','--xml-version=2']
	args.append('--max-configs=%s' % max_configs)
	args.append('-j %s' % jobs)

	if 'cxx' in features:
		args.append('--language=c++')
		args.append('--std=%s' % std_cxx)
	else:
		args.append('--language=c')
		args.append('--std=%s' % std_c)

	if Options.options.cppcheck_check_config:
		args.append('--check-config')

	if set(['cprogram','cxxprogram']) & set(features):
		args.append('--enable=%s' % bin_enable)
	else:
		args.append('--enable=%s' % lib_enable)

	for src in self.to_list(getattr(self, 'source', [])):
		if not isinstance(src, str):
			src = repr(src)
		args.append(src)
	for inc in self.to_incnodes(self.to_list(getattr(self, 'includes', []))):
		if not isinstance(inc, str):
			inc = repr(inc)
		args.append('-I%s' % inc)
	for inc in self.to_incnodes(self.to_list(self.env.INCLUDES)):
		if not isinstance(inc, str):
			inc = repr(inc)
		args.append('-I%s' % inc)
	return cmd + args


class cppcheck(Task.Task):
	quiet = True

	def run(self):
		stderr = self.generator.bld.cmd_and_log(self.cmd, quiet=Context.STDERR, output=Context.STDERR)
		self._save_xml_report(stderr)
		defects = self._get_defects(stderr)
		index = self._create_html_report(defects)
		self._errors_evaluate(defects, index)
		return 0

	def _save_xml_report(self, s):
		'''use cppcheck xml result string, add the command string used to invoke cppcheck
		and save as xml file.
		'''
		header = '%s\n' % s.splitlines()[0]
		root = ElementTree.fromstring(s)
		cmd = ElementTree.SubElement(root.find('cppcheck'), 'cmd')
		cmd.text = str(self.cmd)
		body = ElementTree.tostring(root).decode('us-ascii')
		body_html_name = 'cppcheck-%s.xml' % self.generator.get_name()
		if self.env.CPPCHECK_SINGLE_HTML:
			body_html_name = 'cppcheck.xml'
		node = self.generator.path.get_bld().find_or_declare(body_html_name)
		node.write(header + body)

	def _get_defects(self, xml_string):
		'''evaluate the xml string returned by cppcheck (on sdterr) and use it to create
		a list of defects.
		'''
		defects = []
		for error in ElementTree.fromstring(xml_string).iter('error'):
			defect = {}
			defect['id'] = error.get('id')
			defect['severity'] = error.get('severity')
			defect['msg'] = str(error.get('msg')).replace('<','&lt;')
			defect['verbose'] = error.get('verbose')
			for location in error.findall('location'):
				defect['file'] = location.get('file')
				defect['line'] = str(int(location.get('line')) - 1)
			defects.append(defect)
		return defects

	def _create_html_report(self, defects):
		files, css_style_defs = self._create_html_files(defects)
		index = self._create_html_index(files)
		self._create_css_file(css_style_defs)
		return index

	def _create_html_files(self, defects):
		sources = {}
		defects = [defect for defect in defects if 'file' in defect]
		for defect in defects:
			name = defect['file']
			if not name in sources:
				sources[name] = [defect]
			else:
				sources[name].append(defect)

		files = {}
		css_style_defs = None
		bpath = self.generator.path.get_bld().abspath()
		names = list(sources.keys())
		for i in range(0,len(names)):
			name = names[i]
			if self.env.CPPCHECK_SINGLE_HTML:
				htmlfile = 'cppcheck/%i.html' % (i)
			else:
				htmlfile = 'cppcheck/%s%i.html' % (self.generator.get_name(),i)
			errors = sources[name]
			files[name] = { 'htmlfile': '%s/%s' % (bpath, htmlfile), 'errors': errors }
			css_style_defs = self._create_html_file(name, htmlfile, errors)
		return files, css_style_defs

	def _create_html_file(self, sourcefile, htmlfile, errors):
		name = self.generator.get_name()
		root = ElementTree.fromstring(CPPCHECK_HTML_FILE)
		title = root.find('head/title')
		title.text = 'cppcheck - report - %s' % name

		body = root.find('body')
		for div in body.findall('div'):
			if div.get('id') == 'page':
				page = div
				break
		for div in page.findall('div'):
			if div.get('id') == 'header':
				h1 = div.find('h1')
				h1.text = 'cppcheck report - %s' % name
			if div.get('id') == 'menu':
				indexlink = div.find('a')
				if self.env.CPPCHECK_SINGLE_HTML:
					indexlink.attrib['href'] = 'index.html'
				else:
					indexlink.attrib['href'] = 'index-%s.html' % name
			if div.get('id') == 'content':
				content = div
				srcnode = self.generator.bld.root.find_node(sourcefile)
				hl_lines = [e['line'] for e in errors if 'line' in e]
				formatter = CppcheckHtmlFormatter(linenos=True, style='colorful', hl_lines=hl_lines, lineanchors='line')
				formatter.errors = [e for e in errors if 'line' in e]
				css_style_defs = formatter.get_style_defs('.highlight')
				lexer = pygments.lexers.guess_lexer_for_filename(sourcefile, "")
				s = pygments.highlight(srcnode.read(), lexer, formatter)
				table = ElementTree.fromstring(s)
				content.append(table)

		s = ElementTree.tostring(root, method='html').decode('us-ascii')
		s = CCPCHECK_HTML_TYPE + s
		node = self.generator.path.get_bld().find_or_declare(htmlfile)
		node.write(s)
		return css_style_defs

	def _create_html_index(self, files):
		name = self.generator.get_name()
		root = ElementTree.fromstring(CPPCHECK_HTML_FILE)
		title = root.find('head/title')
		title.text = 'cppcheck - report - %s' % name

		body = root.find('body')
		for div in body.findall('div'):
			if div.get('id') == 'page':
				page = div
				break
		for div in page.findall('div'):
			if div.get('id') == 'header':
				h1 = div.find('h1')
				h1.text = 'cppcheck report - %s' % name
			if div.get('id') == 'content':
				content = div
				self._create_html_table(content, files)
			if div.get('id') == 'menu':
				indexlink = div.find('a')
				if self.env.CPPCHECK_SINGLE_HTML:
					indexlink.attrib['href'] = 'index.html'
				else:
					indexlink.attrib['href'] = 'index-%s.html' % name

		s = ElementTree.tostring(root, method='html').decode('us-ascii')
		s = CCPCHECK_HTML_TYPE + s
		index_html_name = 'cppcheck/index-%s.html' % name
		if self.env.CPPCHECK_SINGLE_HTML:
			index_html_name = 'cppcheck/index.html'
		node = self.generator.path.get_bld().find_or_declare(index_html_name)
		node.write(s)
		return node

	def _create_html_table(self, content, files):
		table = ElementTree.fromstring(CPPCHECK_HTML_TABLE)
		for name, val in files.items():
			f = val['htmlfile']
			s = '<tr><td colspan="4"><a href="%s">%s</a></td></tr>\n' % (f,name)
			row = ElementTree.fromstring(s)
			table.append(row)

			errors = sorted(val['errors'], key=lambda e: int(e['line']) if 'line' in e else sys.maxint)
			for e in errors:
				if not 'line' in e:
					s = '<tr><td></td><td>%s</td><td>%s</td><td>%s</td></tr>\n' % (e['id'], e['severity'], e['msg'])
				else:
					attr = ''
					if e['severity'] == 'error':
						attr = 'class="error"'
					s = '<tr><td><a href="%s#line-%s">%s</a></td>' % (f, e['line'], e['line'])
					s+= '<td>%s</td><td>%s</td><td %s>%s</td></tr>\n' % (e['id'], e['severity'], attr, e['msg'])
				row = ElementTree.fromstring(s)
				table.append(row)
		content.append(table)

	def _create_css_file(self, css_style_defs):
		css = str(CPPCHECK_CSS_FILE)
		if css_style_defs:
			css = "%s\n%s\n" % (css, css_style_defs)
		node = self.generator.path.get_bld().find_or_declare('cppcheck/style.css')
		node.write(css)

	def _errors_evaluate(self, errors, http_index):
		name = self.generator.get_name()
		fatal = self.fatal
		severity = [err['severity'] for err in errors]
		problems = [err for err in errors if err['severity'] != 'information']

		if set(fatal) & set(severity):
			exc  = "\n"
			exc += "\nccpcheck detected fatal error(s) in task '%s', see report for details:" % name
			exc += "\n    file://%r" % (http_index)
			exc += "\n"
			self.generator.bld.fatal(exc)

		elif len(problems):
			msg =  "\nccpcheck detected (possible) problem(s) in task '%s', see report for details:" % name
			msg += "\n    file://%r" % http_index
			msg += "\n"
			Logs.error(msg)


class CppcheckHtmlFormatter(pygments.formatters.HtmlFormatter):
	errors = []

	def wrap(self, source, outfile):
		line_no = 1
		for i, t in super(CppcheckHtmlFormatter, self).wrap(source, outfile):
			# If this is a source code line we want to add a span tag at the end.
			if i == 1:
				for error in self.errors:
					if int(error['line']) == line_no:
						t = t.replace('\n', CPPCHECK_HTML_ERROR % error['msg'])
				line_no += 1
			yield i, t


CCPCHECK_HTML_TYPE = \
'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">\n'

CPPCHECK_HTML_FILE = """
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd" [<!ENTITY nbsp "&#160;">]>
<html>
	<head>
		<title>cppcheck - report - XXX</title>
		<link href="style.css" rel="stylesheet" type="text/css" />
		<style type="text/css">
		</style>
	</head>
	<body class="body">
		<div id="page-header">&nbsp;</div>
		<div id="page">
			<div id="header">
				<h1>cppcheck report - XXX</h1>
			</div>
			<div id="menu">
				<a href="index.html">Defect list</a>
			</div>
			<div id="content">
			</div>
			<div id="footer">
				<div>cppcheck - a tool for static C/C++ code analysis</div>
				<div>
				Internet: <a href="http://cppcheck.sourceforge.net">http://cppcheck.sourceforge.net</a><br/>
          		Forum: <a href="http://apps.sourceforge.net/phpbb/cppcheck/">http://apps.sourceforge.net/phpbb/cppcheck/</a><br/>
				IRC: #cppcheck at irc.freenode.net
				</div>
				&nbsp;
			</div>
		&nbsp;
		</div>
		<div id="page-footer">&nbsp;</div>
	</body>
</html>
"""

CPPCHECK_HTML_TABLE = """
<table>
	<tr>
		<th>Line</th>
		<th>Id</th>
		<th>Severity</th>
		<th>Message</th>
	</tr>
</table>
"""

CPPCHECK_HTML_ERROR = \
'<span style="background: #ffaaaa;padding: 3px;">&lt;--- %s</span>\n'

CPPCHECK_CSS_FILE = """
body.body {
	font-family: Arial;
	font-size: 13px;
	background-color: black;
	padding: 0px;
	margin: 0px;
}

.error {
	font-family: Arial;
	font-size: 13px;
	background-color: #ffb7b7;
	padding: 0px;
	margin: 0px;
}

th, td {
	min-width: 100px;
	text-align: left;
}

#page-header {
	clear: both;
	width: 1200px;
	margin: 20px auto 0px auto;
	height: 10px;
	border-bottom-width: 2px;
	border-bottom-style: solid;
	border-bottom-color: #aaaaaa;
}

#page {
	width: 1160px;
	margin: auto;
	border-left-width: 2px;
	border-left-style: solid;
	border-left-color: #aaaaaa;
	border-right-width: 2px;
	border-right-style: solid;
	border-right-color: #aaaaaa;
	background-color: White;
	padding: 20px;
}

#page-footer {
	clear: both;
	width: 1200px;
	margin: auto;
	height: 10px;
	border-top-width: 2px;
	border-top-style: solid;
	border-top-color: #aaaaaa;
}

#header {
	width: 100%;
	height: 70px;
	background-image: url(logo.png);
	background-repeat: no-repeat;
	background-position: left top;
	border-bottom-style: solid;
	border-bottom-width: thin;
	border-bottom-color: #aaaaaa;
}

#menu {
	margin-top: 5px;
	text-align: left;
	float: left;
	width: 100px;
	height: 300px;
}

#menu > a {
	margin-left: 10px;
	display: block;
}

#content {
	float: left;
	width: 1020px;
	margin: 5px;
	padding: 0px 10px 10px 10px;
	border-left-style: solid;
	border-left-width: thin;
	border-left-color: #aaaaaa;
}

#footer {
	padding-bottom: 5px;
	padding-top: 5px;
	border-top-style: solid;
	border-top-width: thin;
	border-top-color: #aaaaaa;
	clear: both;
	font-size: 10px;
}

#footer > div {
	float: left;
	width: 33%;
}

"""