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1334 lines
55 KiB
Python
1334 lines
55 KiB
Python
# Copyright (c) 2003-2014 LOGILAB S.A. (Paris, FRANCE).
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# http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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""" %prog [options] module_or_package
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Check that a module satisfies a coding standard (and more !).
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%prog --help
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Display this help message and exit.
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%prog --help-msg <msg-id>[,<msg-id>]
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Display help messages about given message identifiers and exit.
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"""
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from __future__ import print_function
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import collections
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import contextlib
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import itertools
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import operator
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import os
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try:
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import multiprocessing
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except ImportError:
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multiprocessing = None
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import sys
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import tokenize
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import warnings
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import astroid
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from astroid.__pkginfo__ import version as astroid_version
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from astroid import modutils
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from logilab.common import configuration
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from logilab.common import optik_ext
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from logilab.common import interface
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from logilab.common import textutils
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from logilab.common import ureports
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from logilab.common.__pkginfo__ import version as common_version
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import six
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from pylint import checkers
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from pylint import interfaces
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from pylint import reporters
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from pylint import utils
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from pylint import config
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from pylint.__pkginfo__ import version
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MANAGER = astroid.MANAGER
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def _get_new_args(message):
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location = (
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message.abspath,
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message.path,
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message.module,
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message.obj,
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message.line,
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message.column,
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)
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return (
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message.msg_id,
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message.symbol,
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location,
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message.msg,
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message.confidence,
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)
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def _get_python_path(filepath):
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dirname = os.path.realpath(os.path.expanduser(filepath))
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if not os.path.isdir(dirname):
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dirname = os.path.dirname(dirname)
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while True:
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if not os.path.exists(os.path.join(dirname, "__init__.py")):
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return dirname
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old_dirname = dirname
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dirname = os.path.dirname(dirname)
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if old_dirname == dirname:
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return os.getcwd()
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def _merge_stats(stats):
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merged = {}
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for stat in stats:
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for key, item in six.iteritems(stat):
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if key not in merged:
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merged[key] = item
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else:
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if isinstance(item, dict):
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merged[key].update(item)
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else:
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merged[key] = merged[key] + item
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return merged
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# Python Linter class #########################################################
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MSGS = {
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'F0001': ('%s',
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'fatal',
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'Used when an error occurred preventing the analysis of a \
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module (unable to find it for instance).'),
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'F0002': ('%s: %s',
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'astroid-error',
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'Used when an unexpected error occurred while building the '
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'Astroid representation. This is usually accompanied by a '
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'traceback. Please report such errors !'),
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'F0003': ('ignored builtin module %s',
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'ignored-builtin-module',
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'Used to indicate that the user asked to analyze a builtin '
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'module which has been skipped.'),
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'F0010': ('error while code parsing: %s',
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'parse-error',
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'Used when an exception occured while building the Astroid '
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'representation which could be handled by astroid.'),
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'I0001': ('Unable to run raw checkers on built-in module %s',
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'raw-checker-failed',
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'Used to inform that a built-in module has not been checked '
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'using the raw checkers.'),
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'I0010': ('Unable to consider inline option %r',
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'bad-inline-option',
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'Used when an inline option is either badly formatted or can\'t '
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'be used inside modules.'),
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'I0011': ('Locally disabling %s (%s)',
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'locally-disabled',
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'Used when an inline option disables a message or a messages '
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'category.'),
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'I0012': ('Locally enabling %s (%s)',
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'locally-enabled',
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'Used when an inline option enables a message or a messages '
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'category.'),
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'I0013': ('Ignoring entire file',
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'file-ignored',
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'Used to inform that the file will not be checked'),
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'I0020': ('Suppressed %s (from line %d)',
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'suppressed-message',
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'A message was triggered on a line, but suppressed explicitly '
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'by a disable= comment in the file. This message is not '
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'generated for messages that are ignored due to configuration '
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'settings.'),
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'I0021': ('Useless suppression of %s',
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'useless-suppression',
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'Reported when a message is explicitly disabled for a line or '
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'a block of code, but never triggered.'),
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'I0022': ('Pragma "%s" is deprecated, use "%s" instead',
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'deprecated-pragma',
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'Some inline pylint options have been renamed or reworked, '
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'only the most recent form should be used. '
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'NOTE:skip-all is only available with pylint >= 0.26',
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{'old_names': [('I0014', 'deprecated-disable-all')]}),
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'E0001': ('%s',
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'syntax-error',
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'Used when a syntax error is raised for a module.'),
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'E0011': ('Unrecognized file option %r',
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'unrecognized-inline-option',
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'Used when an unknown inline option is encountered.'),
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'E0012': ('Bad option value %r',
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'bad-option-value',
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'Used when a bad value for an inline option is encountered.'),
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}
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def _deprecated_option(shortname, opt_type):
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def _warn_deprecated(option, optname, *args): # pylint: disable=unused-argument
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sys.stderr.write('Warning: option %s is deprecated and ignored.\n' % (optname,))
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return {'short': shortname, 'help': 'DEPRECATED', 'hide': True,
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'type': opt_type, 'action': 'callback', 'callback': _warn_deprecated}
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if multiprocessing is not None:
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class ChildLinter(multiprocessing.Process): # pylint: disable=no-member
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def run(self):
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tasks_queue, results_queue, self._config = self._args # pylint: disable=no-member
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self._config["jobs"] = 1 # Child does not parallelize any further.
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# Run linter for received files/modules.
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for file_or_module in iter(tasks_queue.get, 'STOP'):
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result = self._run_linter(file_or_module[0])
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try:
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results_queue.put(result)
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except Exception as ex:
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print("internal error with sending report for module %s" % file_or_module, file=sys.stderr)
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print(ex, file=sys.stderr)
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results_queue.put({})
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def _run_linter(self, file_or_module):
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linter = PyLinter()
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# Register standard checkers.
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linter.load_default_plugins()
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# Load command line plugins.
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# TODO linter.load_plugin_modules(self._plugins)
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linter.load_configuration(**self._config)
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linter.set_reporter(reporters.CollectingReporter())
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# Run the checks.
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linter.check(file_or_module)
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msgs = [_get_new_args(m) for m in linter.reporter.messages]
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return (file_or_module, linter.file_state.base_name, linter.current_name,
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msgs, linter.stats, linter.msg_status)
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class PyLinter(configuration.OptionsManagerMixIn,
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utils.MessagesHandlerMixIn,
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utils.ReportsHandlerMixIn,
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checkers.BaseTokenChecker):
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"""lint Python modules using external checkers.
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This is the main checker controlling the other ones and the reports
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generation. It is itself both a raw checker and an astroid checker in order
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to:
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* handle message activation / deactivation at the module level
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* handle some basic but necessary stats'data (number of classes, methods...)
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IDE plugins developpers: you may have to call
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`astroid.builder.MANAGER.astroid_cache.clear()` accross run if you want
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to ensure the latest code version is actually checked.
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"""
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__implements__ = (interfaces.ITokenChecker, )
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name = 'master'
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priority = 0
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level = 0
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msgs = MSGS
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@staticmethod
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def make_options():
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return (('ignore',
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{'type' : 'csv', 'metavar' : '<file>[,<file>...]',
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'dest' : 'black_list', 'default' : ('CVS',),
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'help' : 'Add files or directories to the blacklist. '
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'They should be base names, not paths.'}),
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('persistent',
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{'default': True, 'type' : 'yn', 'metavar' : '<y_or_n>',
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'level': 1,
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'help' : 'Pickle collected data for later comparisons.'}),
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('load-plugins',
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{'type' : 'csv', 'metavar' : '<modules>', 'default' : (),
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'level': 1,
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'help' : 'List of plugins (as comma separated values of '
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'python modules names) to load, usually to register '
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'additional checkers.'}),
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('output-format',
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{'default': 'text', 'type': 'string', 'metavar' : '<format>',
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'short': 'f',
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'group': 'Reports',
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'help' : 'Set the output format. Available formats are text,'
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' parseable, colorized, msvs (visual studio) and html. You '
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'can also give a reporter class, eg mypackage.mymodule.'
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'MyReporterClass.'}),
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('files-output',
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{'default': 0, 'type' : 'yn', 'metavar' : '<y_or_n>',
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'group': 'Reports', 'level': 1,
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'help' : 'Put messages in a separate file for each module / '
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'package specified on the command line instead of printing '
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'them on stdout. Reports (if any) will be written in a file '
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'name "pylint_global.[txt|html]".'}),
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('reports',
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{'default': 1, 'type' : 'yn', 'metavar' : '<y_or_n>',
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'short': 'r',
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'group': 'Reports',
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'help' : 'Tells whether to display a full report or only the '
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'messages'}),
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('evaluation',
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{'type' : 'string', 'metavar' : '<python_expression>',
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'group': 'Reports', 'level': 1,
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'default': '10.0 - ((float(5 * error + warning + refactor + '
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'convention) / statement) * 10)',
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'help' : 'Python expression which should return a note less '
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'than 10 (10 is the highest note). You have access '
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'to the variables errors warning, statement which '
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'respectively contain the number of errors / '
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'warnings messages and the total number of '
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'statements analyzed. This is used by the global '
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'evaluation report (RP0004).'}),
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('comment',
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{'default': 0, 'type' : 'yn', 'metavar' : '<y_or_n>',
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'group': 'Reports', 'level': 1,
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'help' : 'Add a comment according to your evaluation note. '
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'This is used by the global evaluation report (RP0004).'}),
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('confidence',
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{'type' : 'multiple_choice', 'metavar': '<levels>',
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'default': '',
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'choices': [c.name for c in interfaces.CONFIDENCE_LEVELS],
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'group': 'Messages control',
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'help' : 'Only show warnings with the listed confidence levels.'
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' Leave empty to show all. Valid levels: %s' % (
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', '.join(c.name for c in interfaces.CONFIDENCE_LEVELS),)}),
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('enable',
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{'type' : 'csv', 'metavar': '<msg ids>',
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'short': 'e',
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'group': 'Messages control',
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'help' : 'Enable the message, report, category or checker with the '
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'given id(s). You can either give multiple identifier '
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'separated by comma (,) or put this option multiple time. '
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'See also the "--disable" option for examples. '}),
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('disable',
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{'type' : 'csv', 'metavar': '<msg ids>',
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'short': 'd',
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'group': 'Messages control',
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'help' : 'Disable the message, report, category or checker '
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'with the given id(s). You can either give multiple identifiers'
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' separated by comma (,) or put this option multiple times '
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'(only on the command line, not in the configuration file '
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'where it should appear only once).'
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'You can also use "--disable=all" to disable everything first '
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'and then reenable specific checks. For example, if you want '
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'to run only the similarities checker, you can use '
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'"--disable=all --enable=similarities". '
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'If you want to run only the classes checker, but have no '
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'Warning level messages displayed, use'
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'"--disable=all --enable=classes --disable=W"'}),
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('msg-template',
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{'type' : 'string', 'metavar': '<template>',
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'group': 'Reports',
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'help' : ('Template used to display messages. '
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'This is a python new-style format string '
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'used to format the message information. '
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'See doc for all details')
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}),
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('include-ids', _deprecated_option('i', 'yn')),
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('symbols', _deprecated_option('s', 'yn')),
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('jobs',
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{'type' : 'int', 'metavar': '<n-processes>',
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'short': 'j',
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'default': 1,
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'help' : '''Use multiple processes to speed up Pylint.''',
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}),
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('unsafe-load-any-extension',
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{'type': 'yn', 'metavar': '<yn>', 'default': False, 'hide': True,
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'help': ('Allow loading of arbitrary C extensions. Extensions'
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' are imported into the active Python interpreter and'
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' may run arbitrary code.')}),
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('extension-pkg-whitelist',
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{'type': 'csv', 'metavar': '<pkg[,pkg]>', 'default': [],
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'help': ('A comma-separated list of package or module names'
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' from where C extensions may be loaded. Extensions are'
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' loading into the active Python interpreter and may run'
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' arbitrary code')}
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),
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)
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option_groups = (
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('Messages control', 'Options controling analysis messages'),
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('Reports', 'Options related to output formating and reporting'),
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)
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def __init__(self, options=(), reporter=None, option_groups=(),
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pylintrc=None):
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# some stuff has to be done before ancestors initialization...
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#
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# messages store / checkers / reporter / astroid manager
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self.msgs_store = utils.MessagesStore()
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self.reporter = None
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self._reporter_name = None
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self._reporters = {}
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self._checkers = collections.defaultdict(list)
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self._pragma_lineno = {}
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self._ignore_file = False
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# visit variables
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self.file_state = utils.FileState()
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self.current_name = None
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self.current_file = None
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self.stats = None
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# init options
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self._external_opts = options
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self.options = options + PyLinter.make_options()
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self.option_groups = option_groups + PyLinter.option_groups
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self._options_methods = {
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'enable': self.enable,
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'disable': self.disable}
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self._bw_options_methods = {'disable-msg': self.disable,
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'enable-msg': self.enable}
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full_version = '%%prog %s, \nastroid %s, common %s\nPython %s' % (
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version, astroid_version, common_version, sys.version)
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configuration.OptionsManagerMixIn.__init__(
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self, usage=__doc__,
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version=full_version,
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config_file=pylintrc or config.PYLINTRC)
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utils.MessagesHandlerMixIn.__init__(self)
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utils.ReportsHandlerMixIn.__init__(self)
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checkers.BaseTokenChecker.__init__(self)
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# provided reports
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self.reports = (('RP0001', 'Messages by category',
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report_total_messages_stats),
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('RP0002', '% errors / warnings by module',
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report_messages_by_module_stats),
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('RP0003', 'Messages',
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report_messages_stats),
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('RP0004', 'Global evaluation',
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self.report_evaluation),
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)
|
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self.register_checker(self)
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self._dynamic_plugins = set()
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self.load_provider_defaults()
|
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if reporter:
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self.set_reporter(reporter)
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|
|
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def load_default_plugins(self):
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checkers.initialize(self)
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reporters.initialize(self)
|
|
# Make sure to load the default reporter, because
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# the option has been set before the plugins had been loaded.
|
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if not self.reporter:
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self._load_reporter()
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|
|
|
def load_plugin_modules(self, modnames):
|
|
"""take a list of module names which are pylint plugins and load
|
|
and register them
|
|
"""
|
|
for modname in modnames:
|
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if modname in self._dynamic_plugins:
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continue
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self._dynamic_plugins.add(modname)
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module = modutils.load_module_from_name(modname)
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module.register(self)
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|
|
|
def _load_reporter(self):
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name = self._reporter_name.lower()
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|
if name in self._reporters:
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self.set_reporter(self._reporters[name]())
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|
else:
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qname = self._reporter_name
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module = modutils.load_module_from_name(
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modutils.get_module_part(qname))
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class_name = qname.split('.')[-1]
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reporter_class = getattr(module, class_name)
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self.set_reporter(reporter_class())
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|
|
|
def set_reporter(self, reporter):
|
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"""set the reporter used to display messages and reports"""
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self.reporter = reporter
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reporter.linter = self
|
|
|
|
def set_option(self, optname, value, action=None, optdict=None):
|
|
"""overridden from configuration.OptionsProviderMixin to handle some
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special options
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|
"""
|
|
if optname in self._options_methods or \
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optname in self._bw_options_methods:
|
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if value:
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try:
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meth = self._options_methods[optname]
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|
except KeyError:
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meth = self._bw_options_methods[optname]
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warnings.warn('%s is deprecated, replace it by %s' % (
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optname, optname.split('-')[0]),
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DeprecationWarning)
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|
value = optik_ext.check_csv(None, optname, value)
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if isinstance(value, (list, tuple)):
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for _id in value:
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meth(_id, ignore_unknown=True)
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|
else:
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meth(value)
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return # no need to call set_option, disable/enable methods do it
|
|
elif optname == 'output-format':
|
|
self._reporter_name = value
|
|
# If the reporters are already available, load
|
|
# the reporter class.
|
|
if self._reporters:
|
|
self._load_reporter()
|
|
|
|
try:
|
|
checkers.BaseTokenChecker.set_option(self, optname,
|
|
value, action, optdict)
|
|
except configuration.UnsupportedAction:
|
|
print('option %s can\'t be read from config file' % \
|
|
optname, file=sys.stderr)
|
|
|
|
def register_reporter(self, reporter_class):
|
|
self._reporters[reporter_class.name] = reporter_class
|
|
|
|
def report_order(self):
|
|
reports = sorted(self._reports, key=lambda x: getattr(x, 'name', ''))
|
|
try:
|
|
# Remove the current reporter and add it
|
|
# at the end of the list.
|
|
reports.pop(reports.index(self))
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
reports.append(self)
|
|
return reports
|
|
|
|
# checkers manipulation methods ############################################
|
|
|
|
def register_checker(self, checker):
|
|
"""register a new checker
|
|
|
|
checker is an object implementing IRawChecker or / and IAstroidChecker
|
|
"""
|
|
assert checker.priority <= 0, 'checker priority can\'t be >= 0'
|
|
self._checkers[checker.name].append(checker)
|
|
for r_id, r_title, r_cb in checker.reports:
|
|
self.register_report(r_id, r_title, r_cb, checker)
|
|
self.register_options_provider(checker)
|
|
if hasattr(checker, 'msgs'):
|
|
self.msgs_store.register_messages(checker)
|
|
checker.load_defaults()
|
|
|
|
# Register the checker, but disable all of its messages.
|
|
# TODO(cpopa): we should have a better API for this.
|
|
if not getattr(checker, 'enabled', True):
|
|
self.disable(checker.name)
|
|
|
|
def disable_noerror_messages(self):
|
|
for msgcat, msgids in six.iteritems(self.msgs_store._msgs_by_category):
|
|
if msgcat == 'E':
|
|
for msgid in msgids:
|
|
self.enable(msgid)
|
|
else:
|
|
for msgid in msgids:
|
|
self.disable(msgid)
|
|
|
|
def disable_reporters(self):
|
|
"""disable all reporters"""
|
|
for reporters in six.itervalues(self._reports):
|
|
for report_id, _, _ in reporters:
|
|
self.disable_report(report_id)
|
|
|
|
def error_mode(self):
|
|
"""error mode: enable only errors; no reports, no persistent"""
|
|
self.disable_noerror_messages()
|
|
self.disable('miscellaneous')
|
|
self.set_option('reports', False)
|
|
self.set_option('persistent', False)
|
|
|
|
# block level option handling #############################################
|
|
#
|
|
# see func_block_disable_msg.py test case for expected behaviour
|
|
|
|
def process_tokens(self, tokens):
|
|
"""process tokens from the current module to search for module/block
|
|
level options
|
|
"""
|
|
control_pragmas = {'disable', 'enable'}
|
|
for (tok_type, content, start, _, _) in tokens:
|
|
if tok_type != tokenize.COMMENT:
|
|
continue
|
|
match = utils.OPTION_RGX.search(content)
|
|
if match is None:
|
|
continue
|
|
if match.group(1).strip() == "disable-all" or \
|
|
match.group(1).strip() == 'skip-file':
|
|
if match.group(1).strip() == "disable-all":
|
|
self.add_message('deprecated-pragma', line=start[0],
|
|
args=('disable-all', 'skip-file'))
|
|
self.add_message('file-ignored', line=start[0])
|
|
self._ignore_file = True
|
|
return
|
|
try:
|
|
opt, value = match.group(1).split('=', 1)
|
|
except ValueError:
|
|
self.add_message('bad-inline-option', args=match.group(1).strip(),
|
|
line=start[0])
|
|
continue
|
|
opt = opt.strip()
|
|
if opt in self._options_methods or opt in self._bw_options_methods:
|
|
try:
|
|
meth = self._options_methods[opt]
|
|
except KeyError:
|
|
meth = self._bw_options_methods[opt]
|
|
# found a "(dis|en)able-msg" pragma deprecated suppresssion
|
|
self.add_message('deprecated-pragma', line=start[0], args=(opt, opt.replace('-msg', '')))
|
|
for msgid in textutils.splitstrip(value):
|
|
# Add the line where a control pragma was encountered.
|
|
if opt in control_pragmas:
|
|
self._pragma_lineno[msgid] = start[0]
|
|
|
|
try:
|
|
if (opt, msgid) == ('disable', 'all'):
|
|
self.add_message('deprecated-pragma', line=start[0], args=('disable=all', 'skip-file'))
|
|
self.add_message('file-ignored', line=start[0])
|
|
self._ignore_file = True
|
|
return
|
|
meth(msgid, 'module', start[0])
|
|
except utils.UnknownMessage:
|
|
self.add_message('bad-option-value', args=msgid, line=start[0])
|
|
else:
|
|
self.add_message('unrecognized-inline-option', args=opt, line=start[0])
|
|
|
|
|
|
# code checking methods ###################################################
|
|
|
|
def get_checkers(self):
|
|
"""return all available checkers as a list"""
|
|
return [self] + [c for checkers in six.itervalues(self._checkers)
|
|
for c in checkers if c is not self]
|
|
|
|
def prepare_checkers(self):
|
|
"""return checkers needed for activated messages and reports"""
|
|
if not self.config.reports:
|
|
self.disable_reporters()
|
|
# get needed checkers
|
|
neededcheckers = [self]
|
|
for checker in self.get_checkers()[1:]:
|
|
# fatal errors should not trigger enable / disabling a checker
|
|
messages = set(msg for msg in checker.msgs
|
|
if msg[0] != 'F' and self.is_message_enabled(msg))
|
|
if (messages or
|
|
any(self.report_is_enabled(r[0]) for r in checker.reports)):
|
|
neededcheckers.append(checker)
|
|
# Sort checkers by priority
|
|
neededcheckers = sorted(neededcheckers,
|
|
key=operator.attrgetter('priority'),
|
|
reverse=True)
|
|
return neededcheckers
|
|
|
|
def should_analyze_file(self, modname, path): # pylint: disable=unused-argument, no-self-use
|
|
"""Returns whether or not a module should be checked.
|
|
|
|
This implementation returns True for all python source file, indicating
|
|
that all files should be linted.
|
|
|
|
Subclasses may override this method to indicate that modules satisfying
|
|
certain conditions should not be linted.
|
|
|
|
:param str modname: The name of the module to be checked.
|
|
:param str path: The full path to the source code of the module.
|
|
:returns: True if the module should be checked.
|
|
:rtype: bool
|
|
"""
|
|
return path.endswith('.py')
|
|
|
|
def check(self, files_or_modules):
|
|
"""main checking entry: check a list of files or modules from their
|
|
name.
|
|
"""
|
|
# initialize msgs_state now that all messages have been registered into
|
|
# the store
|
|
for msg in self.msgs_store.messages:
|
|
if not msg.may_be_emitted():
|
|
self._msgs_state[msg.msgid] = False
|
|
|
|
if not isinstance(files_or_modules, (list, tuple)):
|
|
files_or_modules = (files_or_modules,)
|
|
|
|
if self.config.jobs == 1:
|
|
with fix_import_path(files_or_modules):
|
|
self._do_check(files_or_modules)
|
|
else:
|
|
# Hack that permits running pylint, on Windows, with -m switch
|
|
# and with --jobs, as in 'python -2 -m pylint .. --jobs'.
|
|
# For more details why this is needed,
|
|
# see Python issue http://bugs.python.org/issue10845.
|
|
|
|
mock_main = __name__ != '__main__' # -m switch
|
|
if mock_main:
|
|
sys.modules['__main__'] = sys.modules[__name__]
|
|
try:
|
|
self._parallel_check(files_or_modules)
|
|
finally:
|
|
if mock_main:
|
|
sys.modules.pop('__main__')
|
|
|
|
def _parallel_task(self, files_or_modules):
|
|
# Prepare configuration for child linters.
|
|
filter_options = {'symbols', 'include-ids', 'long-help'}
|
|
filter_options.update([opt_name for opt_name, _ in self._external_opts])
|
|
config = {}
|
|
for opt_providers in six.itervalues(self._all_options):
|
|
for optname, optdict, val in opt_providers.options_and_values():
|
|
if optname not in filter_options:
|
|
config[optname] = configuration.format_option_value(optdict, val)
|
|
|
|
childs = []
|
|
manager = multiprocessing.Manager() # pylint: disable=no-member
|
|
tasks_queue = manager.Queue() # pylint: disable=no-member
|
|
results_queue = manager.Queue() # pylint: disable=no-member
|
|
|
|
for _ in range(self.config.jobs):
|
|
cl = ChildLinter(args=(tasks_queue, results_queue, config))
|
|
cl.start() # pylint: disable=no-member
|
|
childs.append(cl)
|
|
|
|
# send files to child linters
|
|
for files_or_module in files_or_modules:
|
|
tasks_queue.put([files_or_module])
|
|
|
|
# collect results from child linters
|
|
failed = False
|
|
for _ in files_or_modules:
|
|
try:
|
|
result = results_queue.get()
|
|
except Exception as ex:
|
|
print("internal error while receiving results from child linter",
|
|
file=sys.stderr)
|
|
print(ex, file=sys.stderr)
|
|
failed = True
|
|
break
|
|
yield result
|
|
|
|
# Stop child linters and wait for their completion.
|
|
for _ in range(self.config.jobs):
|
|
tasks_queue.put('STOP')
|
|
for cl in childs:
|
|
cl.join()
|
|
|
|
if failed:
|
|
print("Error occured, stopping the linter.", file=sys.stderr)
|
|
sys.exit(32)
|
|
|
|
def _parallel_check(self, files_or_modules):
|
|
# Reset stats.
|
|
self.open()
|
|
|
|
all_stats = []
|
|
for result in self._parallel_task(files_or_modules):
|
|
(
|
|
file_or_module,
|
|
self.file_state.base_name,
|
|
module,
|
|
messages,
|
|
stats,
|
|
msg_status
|
|
) = result
|
|
|
|
if file_or_module == files_or_modules[-1]:
|
|
last_module = module
|
|
|
|
for msg in messages:
|
|
msg = utils.Message(*msg)
|
|
self.set_current_module(module)
|
|
self.reporter.handle_message(msg)
|
|
|
|
all_stats.append(stats)
|
|
self.msg_status |= msg_status
|
|
|
|
self.stats = _merge_stats(itertools.chain(all_stats, [self.stats]))
|
|
self.current_name = last_module
|
|
|
|
# Insert stats data to local checkers.
|
|
for checker in self.get_checkers():
|
|
if checker is not self:
|
|
checker.stats = self.stats
|
|
|
|
def _do_check(self, files_or_modules):
|
|
walker = utils.PyLintASTWalker(self)
|
|
checkers = self.prepare_checkers()
|
|
tokencheckers = [c for c in checkers
|
|
if interface.implements(c, interfaces.ITokenChecker)
|
|
and c is not self]
|
|
rawcheckers = [c for c in checkers
|
|
if interface.implements(c, interfaces.IRawChecker)]
|
|
# notify global begin
|
|
for checker in checkers:
|
|
checker.open()
|
|
if interface.implements(checker, interfaces.IAstroidChecker):
|
|
walker.add_checker(checker)
|
|
# build ast and check modules or packages
|
|
for descr in self.expand_files(files_or_modules):
|
|
modname, filepath = descr['name'], descr['path']
|
|
if not descr['isarg'] and not self.should_analyze_file(modname, filepath):
|
|
continue
|
|
if self.config.files_output:
|
|
reportfile = 'pylint_%s.%s' % (modname, self.reporter.extension)
|
|
self.reporter.set_output(open(reportfile, 'w'))
|
|
self.set_current_module(modname, filepath)
|
|
# get the module representation
|
|
ast_node = self.get_ast(filepath, modname)
|
|
if ast_node is None:
|
|
continue
|
|
# XXX to be correct we need to keep module_msgs_state for every
|
|
# analyzed module (the problem stands with localized messages which
|
|
# are only detected in the .close step)
|
|
self.file_state = utils.FileState(descr['basename'])
|
|
self._ignore_file = False
|
|
# fix the current file (if the source file was not available or
|
|
# if it's actually a c extension)
|
|
self.current_file = ast_node.file # pylint: disable=maybe-no-member
|
|
self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)
|
|
# warn about spurious inline messages handling
|
|
for msgid, line, args in self.file_state.iter_spurious_suppression_messages(self.msgs_store):
|
|
self.add_message(msgid, line, None, args)
|
|
# notify global end
|
|
self.stats['statement'] = walker.nbstatements
|
|
checkers.reverse()
|
|
for checker in checkers:
|
|
checker.close()
|
|
|
|
def expand_files(self, modules):
|
|
"""get modules and errors from a list of modules and handle errors
|
|
"""
|
|
result, errors = utils.expand_modules(modules, self.config.black_list)
|
|
for error in errors:
|
|
message = modname = error["mod"]
|
|
key = error["key"]
|
|
self.set_current_module(modname)
|
|
if key == "fatal":
|
|
message = str(error["ex"]).replace(os.getcwd() + os.sep, '')
|
|
self.add_message(key, args=message)
|
|
return result
|
|
|
|
def set_current_module(self, modname, filepath=None):
|
|
"""set the name of the currently analyzed module and
|
|
init statistics for it
|
|
"""
|
|
if not modname and filepath is None:
|
|
return
|
|
self.reporter.on_set_current_module(modname, filepath)
|
|
self.current_name = modname
|
|
self.current_file = filepath or modname
|
|
self.stats['by_module'][modname] = {}
|
|
self.stats['by_module'][modname]['statement'] = 0
|
|
for msg_cat in six.itervalues(utils.MSG_TYPES):
|
|
self.stats['by_module'][modname][msg_cat] = 0
|
|
|
|
def get_ast(self, filepath, modname):
|
|
"""return a ast(roid) representation for a module"""
|
|
try:
|
|
return MANAGER.ast_from_file(filepath, modname, source=True)
|
|
except SyntaxError as ex:
|
|
self.add_message('syntax-error', line=ex.lineno, args=ex.msg)
|
|
except astroid.AstroidBuildingException as ex:
|
|
self.add_message('parse-error', args=ex)
|
|
except Exception as ex: # pylint: disable=broad-except
|
|
import traceback
|
|
traceback.print_exc()
|
|
self.add_message('astroid-error', args=(ex.__class__, ex))
|
|
|
|
def check_astroid_module(self, ast_node, walker,
|
|
rawcheckers, tokencheckers):
|
|
"""Check a module from its astroid representation."""
|
|
try:
|
|
tokens = utils.tokenize_module(ast_node)
|
|
except tokenize.TokenError as ex:
|
|
self.add_message('syntax-error', line=ex.args[1][0], args=ex.args[0])
|
|
return
|
|
|
|
if not ast_node.pure_python:
|
|
self.add_message('raw-checker-failed', args=ast_node.name)
|
|
else:
|
|
#assert astroid.file.endswith('.py')
|
|
# invoke ITokenChecker interface on self to fetch module/block
|
|
# level options
|
|
self.process_tokens(tokens)
|
|
if self._ignore_file:
|
|
return False
|
|
# walk ast to collect line numbers
|
|
self.file_state.collect_block_lines(self.msgs_store, ast_node)
|
|
# run raw and tokens checkers
|
|
for checker in rawcheckers:
|
|
checker.process_module(ast_node)
|
|
for checker in tokencheckers:
|
|
checker.process_tokens(tokens)
|
|
# generate events to astroid checkers
|
|
walker.walk(ast_node)
|
|
return True
|
|
|
|
# IAstroidChecker interface #################################################
|
|
|
|
def open(self):
|
|
"""initialize counters"""
|
|
self.stats = {'by_module' : {},
|
|
'by_msg' : {},
|
|
}
|
|
MANAGER.always_load_extensions = self.config.unsafe_load_any_extension
|
|
MANAGER.extension_package_whitelist.update(
|
|
self.config.extension_pkg_whitelist)
|
|
for msg_cat in six.itervalues(utils.MSG_TYPES):
|
|
self.stats[msg_cat] = 0
|
|
|
|
def generate_reports(self):
|
|
"""close the whole package /module, it's time to make reports !
|
|
|
|
if persistent run, pickle results for later comparison
|
|
"""
|
|
if self.file_state.base_name is not None:
|
|
# load previous results if any
|
|
previous_stats = config.load_results(self.file_state.base_name)
|
|
# XXX code below needs refactoring to be more reporter agnostic
|
|
self.reporter.on_close(self.stats, previous_stats)
|
|
if self.config.reports:
|
|
sect = self.make_reports(self.stats, previous_stats)
|
|
if self.config.files_output:
|
|
filename = 'pylint_global.' + self.reporter.extension
|
|
self.reporter.set_output(open(filename, 'w'))
|
|
else:
|
|
sect = ureports.Section()
|
|
if self.config.reports or self.config.output_format == 'html':
|
|
self.reporter.display_results(sect)
|
|
# save results if persistent run
|
|
if self.config.persistent:
|
|
config.save_results(self.stats, self.file_state.base_name)
|
|
else:
|
|
if self.config.output_format == 'html':
|
|
# No output will be emitted for the html
|
|
# reporter if the file doesn't exist, so emit
|
|
# the results here.
|
|
self.reporter.display_results(ureports.Section())
|
|
self.reporter.on_close(self.stats, {})
|
|
|
|
# specific reports ########################################################
|
|
|
|
def report_evaluation(self, sect, stats, previous_stats):
|
|
"""make the global evaluation report"""
|
|
# check with at least check 1 statements (usually 0 when there is a
|
|
# syntax error preventing pylint from further processing)
|
|
if stats['statement'] == 0:
|
|
raise utils.EmptyReport()
|
|
# get a global note for the code
|
|
evaluation = self.config.evaluation
|
|
try:
|
|
note = eval(evaluation, {}, self.stats) # pylint: disable=eval-used
|
|
except Exception as ex: # pylint: disable=broad-except
|
|
msg = 'An exception occurred while rating: %s' % ex
|
|
else:
|
|
stats['global_note'] = note
|
|
msg = 'Your code has been rated at %.2f/10' % note
|
|
pnote = previous_stats.get('global_note')
|
|
if pnote is not None:
|
|
msg += ' (previous run: %.2f/10, %+.2f)' % (pnote, note - pnote)
|
|
if self.config.comment:
|
|
msg = '%s\n%s' % (msg, config.get_note_message(note))
|
|
sect.append(ureports.Text(msg))
|
|
|
|
# some reporting functions ####################################################
|
|
|
|
def report_total_messages_stats(sect, stats, previous_stats):
|
|
"""make total errors / warnings report"""
|
|
lines = ['type', 'number', 'previous', 'difference']
|
|
lines += checkers.table_lines_from_stats(stats, previous_stats,
|
|
('convention', 'refactor',
|
|
'warning', 'error'))
|
|
sect.append(ureports.Table(children=lines, cols=4, rheaders=1))
|
|
|
|
def report_messages_stats(sect, stats, _):
|
|
"""make messages type report"""
|
|
if not stats['by_msg']:
|
|
# don't print this report when we didn't detected any errors
|
|
raise utils.EmptyReport()
|
|
in_order = sorted([(value, msg_id)
|
|
for msg_id, value in six.iteritems(stats['by_msg'])
|
|
if not msg_id.startswith('I')])
|
|
in_order.reverse()
|
|
lines = ('message id', 'occurrences')
|
|
for value, msg_id in in_order:
|
|
lines += (msg_id, str(value))
|
|
sect.append(ureports.Table(children=lines, cols=2, rheaders=1))
|
|
|
|
def report_messages_by_module_stats(sect, stats, _):
|
|
"""make errors / warnings by modules report"""
|
|
if len(stats['by_module']) == 1:
|
|
# don't print this report when we are analysing a single module
|
|
raise utils.EmptyReport()
|
|
by_mod = collections.defaultdict(dict)
|
|
for m_type in ('fatal', 'error', 'warning', 'refactor', 'convention'):
|
|
total = stats[m_type]
|
|
for module in six.iterkeys(stats['by_module']):
|
|
mod_total = stats['by_module'][module][m_type]
|
|
if total == 0:
|
|
percent = 0
|
|
else:
|
|
percent = float((mod_total)*100) / total
|
|
by_mod[module][m_type] = percent
|
|
sorted_result = []
|
|
for module, mod_info in six.iteritems(by_mod):
|
|
sorted_result.append((mod_info['error'],
|
|
mod_info['warning'],
|
|
mod_info['refactor'],
|
|
mod_info['convention'],
|
|
module))
|
|
sorted_result.sort()
|
|
sorted_result.reverse()
|
|
lines = ['module', 'error', 'warning', 'refactor', 'convention']
|
|
for line in sorted_result:
|
|
# Don't report clean modules.
|
|
if all(entry == 0 for entry in line[:-1]):
|
|
continue
|
|
lines.append(line[-1])
|
|
for val in line[:-1]:
|
|
lines.append('%.2f' % val)
|
|
if len(lines) == 5:
|
|
raise utils.EmptyReport()
|
|
sect.append(ureports.Table(children=lines, cols=5, rheaders=1))
|
|
|
|
|
|
# utilities ###################################################################
|
|
|
|
|
|
class ArgumentPreprocessingError(Exception):
|
|
"""Raised if an error occurs during argument preprocessing."""
|
|
|
|
|
|
def preprocess_options(args, search_for):
|
|
"""look for some options (keys of <search_for>) which have to be processed
|
|
before others
|
|
|
|
values of <search_for> are callback functions to call when the option is
|
|
found
|
|
"""
|
|
i = 0
|
|
while i < len(args):
|
|
arg = args[i]
|
|
if arg.startswith('--'):
|
|
try:
|
|
option, val = arg[2:].split('=', 1)
|
|
except ValueError:
|
|
option, val = arg[2:], None
|
|
try:
|
|
cb, takearg = search_for[option]
|
|
except KeyError:
|
|
i += 1
|
|
else:
|
|
del args[i]
|
|
if takearg and val is None:
|
|
if i >= len(args) or args[i].startswith('-'):
|
|
msg = 'Option %s expects a value' % option
|
|
raise ArgumentPreprocessingError(msg)
|
|
val = args[i]
|
|
del args[i]
|
|
elif not takearg and val is not None:
|
|
msg = "Option %s doesn't expects a value" % option
|
|
raise ArgumentPreprocessingError(msg)
|
|
cb(option, val)
|
|
else:
|
|
i += 1
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def fix_import_path(args):
|
|
"""Prepare sys.path for running the linter checks.
|
|
|
|
Within this context, each of the given arguments is importable.
|
|
Paths are added to sys.path in corresponding order to the arguments.
|
|
We avoid adding duplicate directories to sys.path.
|
|
`sys.path` is reset to its original value upon exitign this context.
|
|
"""
|
|
orig = list(sys.path)
|
|
changes = []
|
|
for arg in args:
|
|
path = _get_python_path(arg)
|
|
if path in changes:
|
|
continue
|
|
else:
|
|
changes.append(path)
|
|
sys.path[:] = changes + sys.path
|
|
try:
|
|
yield
|
|
finally:
|
|
sys.path[:] = orig
|
|
|
|
|
|
class Run(object):
|
|
"""helper class to use as main for pylint :
|
|
|
|
run(*sys.argv[1:])
|
|
"""
|
|
LinterClass = PyLinter
|
|
option_groups = (
|
|
('Commands', 'Options which are actually commands. Options in this \
|
|
group are mutually exclusive.'),
|
|
)
|
|
|
|
def __init__(self, args, reporter=None, exit=True):
|
|
self._rcfile = None
|
|
self._plugins = []
|
|
try:
|
|
preprocess_options(args, {
|
|
# option: (callback, takearg)
|
|
'init-hook': (cb_init_hook, True),
|
|
'rcfile': (self.cb_set_rcfile, True),
|
|
'load-plugins': (self.cb_add_plugins, True),
|
|
})
|
|
except ArgumentPreprocessingError as ex:
|
|
print(ex, file=sys.stderr)
|
|
sys.exit(32)
|
|
|
|
self.linter = linter = self.LinterClass((
|
|
('rcfile',
|
|
{'action' : 'callback', 'callback' : lambda *args: 1,
|
|
'type': 'string', 'metavar': '<file>',
|
|
'help' : 'Specify a configuration file.'}),
|
|
|
|
('init-hook',
|
|
{'action' : 'callback', 'callback' : lambda *args: 1,
|
|
'type' : 'string', 'metavar': '<code>',
|
|
'level': 1,
|
|
'help' : 'Python code to execute, usually for sys.path '
|
|
'manipulation such as pygtk.require().'}),
|
|
|
|
('help-msg',
|
|
{'action' : 'callback', 'type' : 'string', 'metavar': '<msg-id>',
|
|
'callback' : self.cb_help_message,
|
|
'group': 'Commands',
|
|
'help' : 'Display a help message for the given message id and '
|
|
'exit. The value may be a comma separated list of message ids.'}),
|
|
|
|
('list-msgs',
|
|
{'action' : 'callback', 'metavar': '<msg-id>',
|
|
'callback' : self.cb_list_messages,
|
|
'group': 'Commands', 'level': 1,
|
|
'help' : "Generate pylint's messages."}),
|
|
|
|
('list-conf-levels',
|
|
{'action' : 'callback',
|
|
'callback' : cb_list_confidence_levels,
|
|
'group': 'Commands', 'level': 1,
|
|
'help' : "Generate pylint's messages."}),
|
|
|
|
('full-documentation',
|
|
{'action' : 'callback', 'metavar': '<msg-id>',
|
|
'callback' : self.cb_full_documentation,
|
|
'group': 'Commands', 'level': 1,
|
|
'help' : "Generate pylint's full documentation."}),
|
|
|
|
('generate-rcfile',
|
|
{'action' : 'callback', 'callback' : self.cb_generate_config,
|
|
'group': 'Commands',
|
|
'help' : 'Generate a sample configuration file according to '
|
|
'the current configuration. You can put other options '
|
|
'before this one to get them in the generated '
|
|
'configuration.'}),
|
|
|
|
('generate-man',
|
|
{'action' : 'callback', 'callback' : self.cb_generate_manpage,
|
|
'group': 'Commands',
|
|
'help' : "Generate pylint's man page.", 'hide': True}),
|
|
|
|
('errors-only',
|
|
{'action' : 'callback', 'callback' : self.cb_error_mode,
|
|
'short': 'E',
|
|
'help' : 'In error mode, checkers without error messages are '
|
|
'disabled and for others, only the ERROR messages are '
|
|
'displayed, and no reports are done by default'''}),
|
|
|
|
('py3k',
|
|
{'action' : 'callback', 'callback' : self.cb_python3_porting_mode,
|
|
'help' : 'In Python 3 porting mode, all checkers will be '
|
|
'disabled and only messages emitted by the porting '
|
|
'checker will be displayed'}),
|
|
|
|
('profile',
|
|
{'type' : 'yn', 'metavar' : '<y_or_n>',
|
|
'default': False, 'hide': True,
|
|
'help' : 'Profiled execution.'}),
|
|
|
|
), option_groups=self.option_groups, pylintrc=self._rcfile)
|
|
# register standard checkers
|
|
linter.load_default_plugins()
|
|
# load command line plugins
|
|
linter.load_plugin_modules(self._plugins)
|
|
# add some help section
|
|
linter.add_help_section('Environment variables', config.ENV_HELP, level=1)
|
|
# pylint: disable=bad-continuation
|
|
linter.add_help_section('Output',
|
|
'Using the default text output, the message format is : \n'
|
|
' \n'
|
|
' MESSAGE_TYPE: LINE_NUM:[OBJECT:] MESSAGE \n'
|
|
' \n'
|
|
'There are 5 kind of message types : \n'
|
|
' * (C) convention, for programming standard violation \n'
|
|
' * (R) refactor, for bad code smell \n'
|
|
' * (W) warning, for python specific problems \n'
|
|
' * (E) error, for probable bugs in the code \n'
|
|
' * (F) fatal, if an error occurred which prevented pylint from doing further\n'
|
|
'processing.\n'
|
|
, level=1)
|
|
linter.add_help_section('Output status code',
|
|
'Pylint should leave with following status code: \n'
|
|
' * 0 if everything went fine \n'
|
|
' * 1 if a fatal message was issued \n'
|
|
' * 2 if an error message was issued \n'
|
|
' * 4 if a warning message was issued \n'
|
|
' * 8 if a refactor message was issued \n'
|
|
' * 16 if a convention message was issued \n'
|
|
' * 32 on usage error \n'
|
|
' \n'
|
|
'status 1 to 16 will be bit-ORed so you can know which different categories has\n'
|
|
'been issued by analysing pylint output status code\n',
|
|
level=1)
|
|
# read configuration
|
|
linter.disable('pointless-except')
|
|
linter.disable('suppressed-message')
|
|
linter.disable('useless-suppression')
|
|
linter.read_config_file()
|
|
config_parser = linter.cfgfile_parser
|
|
# run init hook, if present, before loading plugins
|
|
if config_parser.has_option('MASTER', 'init-hook'):
|
|
cb_init_hook('init-hook',
|
|
textutils.unquote(config_parser.get('MASTER',
|
|
'init-hook')))
|
|
# is there some additional plugins in the file configuration, in
|
|
if config_parser.has_option('MASTER', 'load-plugins'):
|
|
plugins = textutils.splitstrip(
|
|
config_parser.get('MASTER', 'load-plugins'))
|
|
linter.load_plugin_modules(plugins)
|
|
# now we can load file config and command line, plugins (which can
|
|
# provide options) have been registered
|
|
linter.load_config_file()
|
|
if reporter:
|
|
# if a custom reporter is provided as argument, it may be overridden
|
|
# by file parameters, so re-set it here, but before command line
|
|
# parsing so it's still overrideable by command line option
|
|
linter.set_reporter(reporter)
|
|
try:
|
|
args = linter.load_command_line_configuration(args)
|
|
except SystemExit as exc:
|
|
if exc.code == 2: # bad options
|
|
exc.code = 32
|
|
raise
|
|
if not args:
|
|
print(linter.help())
|
|
sys.exit(32)
|
|
|
|
if linter.config.jobs < 0:
|
|
print("Jobs number (%d) should be greater than 0"
|
|
% linter.config.jobs, file=sys.stderr)
|
|
sys.exit(32)
|
|
if linter.config.jobs > 1 or linter.config.jobs == 0:
|
|
if multiprocessing is None:
|
|
print("Multiprocessing library is missing, "
|
|
"fallback to single process", file=sys.stderr)
|
|
linter.set_option("jobs", 1)
|
|
else:
|
|
if linter.config.jobs == 0:
|
|
linter.config.jobs = multiprocessing.cpu_count()
|
|
|
|
# insert current working directory to the python path to have a correct
|
|
# behaviour
|
|
if self.linter.config.profile:
|
|
with fix_import_path(args):
|
|
print('** profiled run', file=sys.stderr)
|
|
import cProfile, pstats
|
|
cProfile.runctx('linter.check(%r)' % args, globals(), locals(),
|
|
'stones.prof')
|
|
data = pstats.Stats('stones.prof')
|
|
data.strip_dirs()
|
|
data.sort_stats('time', 'calls')
|
|
data.print_stats(30)
|
|
else:
|
|
linter.check(args)
|
|
linter.generate_reports()
|
|
if exit:
|
|
sys.exit(self.linter.msg_status)
|
|
|
|
def cb_set_rcfile(self, name, value):
|
|
"""callback for option preprocessing (i.e. before option parsing)"""
|
|
self._rcfile = value
|
|
|
|
def cb_add_plugins(self, name, value):
|
|
"""callback for option preprocessing (i.e. before option parsing)"""
|
|
self._plugins.extend(textutils.splitstrip(value))
|
|
|
|
def cb_error_mode(self, *args, **kwargs):
|
|
"""error mode:
|
|
* disable all but error messages
|
|
* disable the 'miscellaneous' checker which can be safely deactivated in
|
|
debug
|
|
* disable reports
|
|
* do not save execution information
|
|
"""
|
|
self.linter.error_mode()
|
|
|
|
def cb_generate_config(self, *args, **kwargs):
|
|
"""optik callback for sample config file generation"""
|
|
self.linter.generate_config(skipsections=('COMMANDS',))
|
|
sys.exit(0)
|
|
|
|
def cb_generate_manpage(self, *args, **kwargs):
|
|
"""optik callback for sample config file generation"""
|
|
from pylint import __pkginfo__
|
|
self.linter.generate_manpage(__pkginfo__)
|
|
sys.exit(0)
|
|
|
|
def cb_help_message(self, option, optname, value, parser):
|
|
"""optik callback for printing some help about a particular message"""
|
|
self.linter.msgs_store.help_message(textutils.splitstrip(value))
|
|
sys.exit(0)
|
|
|
|
def cb_full_documentation(self, option, optname, value, parser):
|
|
"""optik callback for printing full documentation"""
|
|
self.linter.print_full_documentation()
|
|
sys.exit(0)
|
|
|
|
def cb_list_messages(self, option, optname, value, parser): # FIXME
|
|
"""optik callback for printing available messages"""
|
|
self.linter.msgs_store.list_messages()
|
|
sys.exit(0)
|
|
|
|
def cb_python3_porting_mode(self, *args, **kwargs):
|
|
"""Activate only the python3 porting checker."""
|
|
self.linter.disable('all')
|
|
self.linter.enable('python3')
|
|
|
|
|
|
def cb_list_confidence_levels(option, optname, value, parser):
|
|
for level in interfaces.CONFIDENCE_LEVELS:
|
|
print('%-18s: %s' % level)
|
|
sys.exit(0)
|
|
|
|
def cb_init_hook(optname, value):
|
|
"""exec arbitrary code to set sys.path for instance"""
|
|
exec(value) # pylint: disable=exec-used
|
|
|
|
|
|
if __name__ == '__main__':
|
|
Run(sys.argv[1:])
|