summaryrefslogtreecommitdiff
path: root/tools/patman/checkpatch.py
blob: 795b5193145e2d58b5682f25adc775f03d0dab83 (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
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2011 The Chromium OS Authors.
#

import collections
import os
import re
import sys

from patman import command
from patman import gitutil
from patman import terminal
from patman import tools

def FindCheckPatch():
    top_level = gitutil.GetTopLevel()
    try_list = [
        os.getcwd(),
        os.path.join(os.getcwd(), '..', '..'),
        os.path.join(top_level, 'tools'),
        os.path.join(top_level, 'scripts'),
        '%s/bin' % os.getenv('HOME'),
        ]
    # Look in current dir
    for path in try_list:
        fname = os.path.join(path, 'checkpatch.pl')
        if os.path.isfile(fname):
            return fname

    # Look upwwards for a Chrome OS tree
    while not os.path.ismount(path):
        fname = os.path.join(path, 'src', 'third_party', 'kernel', 'files',
                'scripts', 'checkpatch.pl')
        if os.path.isfile(fname):
            return fname
        path = os.path.dirname(path)

    sys.exit('Cannot find checkpatch.pl - please put it in your ' +
             '~/bin directory or use --no-check')

def CheckPatch(fname, verbose=False):
    """Run checkpatch.pl on a file.

    Returns:
        namedtuple containing:
            ok: False=failure, True=ok
            problems: List of problems, each a dict:
                'type'; error or warning
                'msg': text message
                'file' : filename
                'line': line number
            errors: Number of errors
            warnings: Number of warnings
            checks: Number of checks
            lines: Number of lines
            stdout: Full output of checkpatch
    """
    fields = ['ok', 'problems', 'errors', 'warnings', 'checks', 'lines',
              'stdout']
    result = collections.namedtuple('CheckPatchResult', fields)
    result.ok = False
    result.errors, result.warning, result.checks = 0, 0, 0
    result.lines = 0
    result.problems = []
    chk = FindCheckPatch()
    item = {}
    result.stdout = command.Output(chk, '--no-tree', fname,
                                   raise_on_error=False)
    #pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE)
    #stdout, stderr = pipe.communicate()

    # total: 0 errors, 0 warnings, 159 lines checked
    # or:
    # total: 0 errors, 2 warnings, 7 checks, 473 lines checked
    re_stats = re.compile('total: (\\d+) errors, (\d+) warnings, (\d+)')
    re_stats_full = re.compile('total: (\\d+) errors, (\d+) warnings, (\d+)'
                               ' checks, (\d+)')
    re_ok = re.compile('.*has no obvious style problems')
    re_bad = re.compile('.*has style problems, please review')
    re_error = re.compile('ERROR: (.*)')
    re_warning = re.compile('WARNING: (.*)')
    re_check = re.compile('CHECK: (.*)')
    re_file = re.compile('#\d+: FILE: ([^:]*):(\d+):')

    for line in result.stdout.splitlines():
        if verbose:
            print(line)

        # A blank line indicates the end of a message
        if not line and item:
            result.problems.append(item)
            item = {}
        match = re_stats_full.match(line)
        if not match:
            match = re_stats.match(line)
        if match:
            result.errors = int(match.group(1))
            result.warnings = int(match.group(2))
            if len(match.groups()) == 4:
                result.checks = int(match.group(3))
                result.lines = int(match.group(4))
            else:
                result.lines = int(match.group(3))
        elif re_ok.match(line):
            result.ok = True
        elif re_bad.match(line):
            result.ok = False
        err_match = re_error.match(line)
        warn_match = re_warning.match(line)
        file_match = re_file.match(line)
        check_match = re_check.match(line)
        if err_match:
            item['msg'] = err_match.group(1)
            item['type'] = 'error'
        elif warn_match:
            item['msg'] = warn_match.group(1)
            item['type'] = 'warning'
        elif check_match:
            item['msg'] = check_match.group(1)
            item['type'] = 'check'
        elif file_match:
            item['file'] = file_match.group(1)
            item['line'] = int(file_match.group(2))

    return result

def GetWarningMsg(col, msg_type, fname, line, msg):
    '''Create a message for a given file/line

    Args:
        msg_type: Message type ('error' or 'warning')
        fname: Filename which reports the problem
        line: Line number where it was noticed
        msg: Message to report
    '''
    if msg_type == 'warning':
        msg_type = col.Color(col.YELLOW, msg_type)
    elif msg_type == 'error':
        msg_type = col.Color(col.RED, msg_type)
    elif msg_type == 'check':
        msg_type = col.Color(col.MAGENTA, msg_type)
    return '%s:%d: %s: %s\n' % (fname, line, msg_type, msg)

def CheckPatches(verbose, args):
    '''Run the checkpatch.pl script on each patch'''
    error_count, warning_count, check_count = 0, 0, 0
    col = terminal.Color()

    for fname in args:
        result = CheckPatch(fname, verbose)
        if not result.ok:
            error_count += result.errors
            warning_count += result.warnings
            check_count += result.checks
            print('%d errors, %d warnings, %d checks for %s:' % (result.errors,
                    result.warnings, result.checks, col.Color(col.BLUE, fname)))
            if (len(result.problems) != result.errors + result.warnings +
                    result.checks):
                print("Internal error: some problems lost")
            for item in result.problems:
                sys.stderr.write(
                    GetWarningMsg(col, item.get('type', '<unknown>'),
                        item.get('file', '<unknown>'),
                        item.get('line', 0), item.get('msg', 'message')))
            print
            #print(stdout)
    if error_count or warning_count or check_count:
        str = 'checkpatch.pl found %d error(s), %d warning(s), %d checks(s)'
        color = col.GREEN
        if warning_count:
            color = col.YELLOW
        if error_count:
            color = col.RED
        print(col.Color(color, str % (error_count, warning_count, check_count)))
        return False
    return True