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#!/usr/bin/env python

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Find warnings for C++ code."""

from __future__ import absolute_import

from __future__ import print_function

from __future__ import unicode_literals

import argparse

import fnmatch

import os

import sys

from cpp import __version__

from cpp import ast

from cpp import find_warnings

from cpp import nonvirtual_dtors

from cpp import static_data

from cpp import tokenize

from cpp import utils

def match_file(filename, exclude_patterns):

"""Return True if file is a C++ file or a directory."""

base_name = os.path.basename(filename)

if base_name.startswith('.'):

return False

for pattern in exclude_patterns:

if fnmatch.fnmatch(base_name, pattern):

return False

if find_warnings.is_header_file(filename):

return True

if find_warnings.is_cpp_file(filename):

return True

if os.path.isdir(filename):

return True

return False

def find_files(filenames, exclude_patterns):

"""Yield filenames."""

while filenames:

name = filenames.pop(0)

if os.path.isdir(name):

for root, directories, children in os.walk(name):

filenames += [os.path.join(root, f) for f in sorted(children)

if match_file(os.path.join(root, f),

exclude_patterns)]

directories[:] = [d for d in directories

if match_file(os.path.join(root, d),

exclude_patterns)]

else:

yield name

def main():

parser = argparse.ArgumentParser()

parser.add_argument('files', nargs='+')

parser.add_argument('--exclude', action='append',

dest='exclude_patterns', default=[], metavar='pattern',

help='exclude files matching this pattern; '

'specify this multiple times for multiple '

'patterns')

parser.add_argument('--include-path', '-i', '-I', action='append',

dest='include_paths', default=[],

metavar='path',

help='add a header include path; '

'specify this multiple times for multiple '

'include paths')

parser.add_argument('--include-path-system', '-s', action='append',

dest='include_system_paths', default=[],

metavar='sys_path',

help='same as --include-path but explicitly '

'designates all header files found in these '

'directories as "system" includes')

parser.add_argument('--include-path-non-system', '-n',

action='append', dest='include_nonsystem_paths',

metavar='nonsys_path',

default=[],

help='same as --include-path but explicitly '

'designates all header files found in these '

'directories as "non-system" includes')

parser.add_argument('--verbose', action='store_true',

help='print verbose messages')

parser.add_argument('--version', action='version',

version='%(prog)s ' + __version__)

parser.add_argument('--quiet', '-q', action='store_true',

help='ignore parse errors')

args = parser.parse_args()

# For Python 2 where argparse does not return Unicode.

args.files = [filename.decode(sys.getfilesystemencoding())

if hasattr(filename, 'decode') else filename

for filename in args.files]

all_includes = list(set(

args.include_paths + args.include_system_paths +

args.include_nonsystem_paths))

status = 0

for filename in (

sorted(find_files(args.files,

exclude_patterns=args.exclude_patterns))

if args.verbose:

print('Processing', filename, file=sys.stderr)

try:

source = utils.read_file(filename)

if source is None:

continue

builder = ast.builder_from_source(source,

filename,

args.include_system_paths,

args.include_nonsystem_paths,

quiet=args.quiet)

entire_ast = list([_f for _f in builder.generate() if _f])

except tokenize.TokenError as exception:

if args.verbose:

print('{}: token error: {}'.format(filename, exception),

file=sys.stderr)

continue

except (ast.ParseError,

UnicodeDecodeError) as exception:

if not args.quiet:

print('{}: parsing error: {}'.format(filename, exception),

file=sys.stderr)

continue

for module in [find_warnings,

nonvirtual_dtors,

static_data]:

if module.run(filename, source, entire_ast,

include_paths=all_includes,

system_include_paths=args.include_system_paths,

nonsystem_include_paths=args.include_nonsystem_paths,

quiet=args.quiet):

status = 1

return status

try:

sys.exit(main())

except KeyboardInterrupt:

sys.exit(1)

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