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lint.py
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lint.py
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# -*- coding: utf-8 -*-
# Copyright (c) 2006-2015 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2008 Fabrice Douchant <Fabrice.Douchant@logilab.fr>
# Copyright (c) 2009 Vincent
# Copyright (c) 2009 Mads Kiilerich <mads@kiilerich.com>
# Copyright (c) 2011-2014 Google, Inc.
# Copyright (c) 2012 David Pursehouse <david.pursehouse@sonymobile.com>
# Copyright (c) 2012 Kevin Jing Qiu <kevin.jing.qiu@gmail.com>
# Copyright (c) 2012 FELD Boris <lothiraldan@gmail.com>
# Copyright (c) 2012 JT Olds <jtolds@xnet5.com>
# Copyright (c) 2014-2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014-2015 Michal Nowikowski <godfryd@gmail.com>
# Copyright (c) 2014 Brett Cannon <brett@python.org>
# Copyright (c) 2014 Alexandru Coman <fcoman@bitdefender.com>
# Copyright (c) 2014 Daniel Harding <dharding@living180.net>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2014 Dan Goldsmith <djgoldsmith@googlemail.com>
# Copyright (c) 2015-2016 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2015 Aru Sahni <arusahni@gmail.com>
# Copyright (c) 2015 Steven Myint <hg@stevenmyint.com>
# Copyright (c) 2015 Simu Toni <simutoni@gmail.com>
# Copyright (c) 2015 Mihai Balint <balint.mihai@gmail.com>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016-2017 Łukasz Rogalski <rogalski.91@gmail.com>
# Copyright (c) 2016 Glenn Matthews <glenn@e-dad.net>
# Copyright (c) 2016 Alan Evangelista <alanoe@linux.vnet.ibm.com>
# Copyright (c) 2017-2018 Ville Skyttä <ville.skytta@iki.fi>
# Copyright (c) 2017-2018 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2017 Daniel Miller <millerdev@gmail.com>
# Copyright (c) 2017 Roman Ivanov <me@roivanov.com>
# Copyright (c) 2017 Ned Batchelder <ned@nedbatchelder.com>
# Copyright (c) 2018 Randall Leeds <randall@bleeds.info>
# Copyright (c) 2018 Mike Frysinger <vapier@gmail.com>
# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
# Copyright (c) 2018 Ville Skyttä <ville.skytta@upcloud.com>
# Copyright (c) 2018 Sushobhit <31987769+sushobhit27@users.noreply.github.com>
# Copyright (c) 2018 Anthony Sottile <asottile@umich.edu>
# Copyright (c) 2018 Jason Owen <jason.a.owen@gmail.com>
# Copyright (c) 2018 Gary Tyler McLeod <mail@garytyler.com>
# Copyright (c) 2018 Yuval Langer <yuvallanger@mail.tau.ac.il>
# Copyright (c) 2018 Nick Drozd <nicholasdrozd@gmail.com>
# Copyright (c) 2018 kapsh <kapsh@kap.sh>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
# pylint: disable=broad-except
""" pylint [options] modules_or_packages
Check that module(s) satisfy a coding standard (and more !).
pylint --help
Display this help message and exit.
pylint --help-msg <msg-id>[,<msg-id>]
Display help messages about given message identifiers and exit.
"""
import collections
import contextlib
import operator
import os
import sys
import tokenize
import traceback
import warnings
from io import TextIOWrapper
import astroid
from astroid import modutils
from astroid.__pkginfo__ import version as astroid_version
from astroid.builder import AstroidBuilder
from pylint import __pkginfo__, checkers, config, exceptions, interfaces, reporters
from pylint.__pkginfo__ import version
from pylint.constants import MAIN_CHECKER_NAME, MSG_TYPES, OPTION_RGX
from pylint.message import Message, MessageDefinitionStore, MessagesHandlerMixIn
from pylint.reporters.ureports import nodes as report_nodes
from pylint.utils import ASTWalker, FileState, utils
try:
import multiprocessing
except ImportError:
multiprocessing = None # type: ignore
MANAGER = astroid.MANAGER
def _ast_from_string(data, filepath, modname):
cached = MANAGER.astroid_cache.get(modname)
if cached and cached.file == filepath:
return cached
return AstroidBuilder(MANAGER).string_build(data, modname, filepath)
def _read_stdin():
# https://mail.python.org/pipermail/python-list/2012-November/634424.html
sys.stdin = TextIOWrapper(sys.stdin.detach(), encoding="utf-8")
return sys.stdin.read()
def _get_new_args(message):
location = (
message.abspath,
message.path,
message.module,
message.obj,
message.line,
message.column,
)
return (message.msg_id, message.symbol, location, message.msg, message.confidence)
def _get_python_path(filepath):
dirname = os.path.realpath(os.path.expanduser(filepath))
if not os.path.isdir(dirname):
dirname = os.path.dirname(dirname)
while True:
if not os.path.exists(os.path.join(dirname, "__init__.py")):
return dirname
old_dirname = dirname
dirname = os.path.dirname(dirname)
if old_dirname == dirname:
return os.getcwd()
return None
def _merge_stats(stats):
merged = {}
by_msg = collections.Counter()
for stat in stats:
message_stats = stat.pop("by_msg", {})
by_msg.update(message_stats)
for key, item in stat.items():
if key not in merged:
merged[key] = item
else:
if isinstance(item, dict):
merged[key].update(item)
else:
merged[key] = merged[key] + item
merged["by_msg"] = by_msg
return merged
# Python Linter class #########################################################
MSGS = {
"F0001": (
"%s",
"fatal",
"Used when an error occurred preventing the analysis of a \
module (unable to find it for instance).",
),
"F0002": (
"%s: %s",
"astroid-error",
"Used when an unexpected error occurred while building the "
"Astroid representation. This is usually accompanied by a "
"traceback. Please report such errors !",
),
"F0010": (
"error while code parsing: %s",
"parse-error",
"Used when an exception occurred while building the Astroid "
"representation which could be handled by astroid.",
),
"I0001": (
"Unable to run raw checkers on built-in module %s",
"raw-checker-failed",
"Used to inform that a built-in module has not been checked "
"using the raw checkers.",
),
"I0010": (
"Unable to consider inline option %r",
"bad-inline-option",
"Used when an inline option is either badly formatted or can't "
"be used inside modules.",
),
"I0011": (
"Locally disabling %s (%s)",
"locally-disabled",
"Used when an inline option disables a message or a messages category.",
),
"I0013": (
"Ignoring entire file",
"file-ignored",
"Used to inform that the file will not be checked",
),
"I0020": (
"Suppressed %s (from line %d)",
"suppressed-message",
"A message was triggered on a line, but suppressed explicitly "
"by a disable= comment in the file. This message is not "
"generated for messages that are ignored due to configuration "
"settings.",
),
"I0021": (
"Useless suppression of %s",
"useless-suppression",
"Reported when a message is explicitly disabled for a line or "
"a block of code, but never triggered.",
),
"I0022": (
'Pragma "%s" is deprecated, use "%s" instead',
"deprecated-pragma",
"Some inline pylint options have been renamed or reworked, "
"only the most recent form should be used. "
"NOTE:skip-all is only available with pylint >= 0.26",
{"old_names": [("I0014", "deprecated-disable-all")]},
),
"E0001": ("%s", "syntax-error", "Used when a syntax error is raised for a module."),
"E0011": (
"Unrecognized file option %r",
"unrecognized-inline-option",
"Used when an unknown inline option is encountered.",
),
"E0012": (
"Bad option value %r",
"bad-option-value",
"Used when a bad value for an inline option is encountered.",
),
}
def _cpu_count() -> int:
"""Use sched_affinity if available for virtualized or containerized environments."""
sched_getaffinity = getattr(os, "sched_getaffinity", None)
# pylint: disable=not-callable,using-constant-test
if sched_getaffinity:
return len(sched_getaffinity(0))
if multiprocessing:
return multiprocessing.cpu_count()
return 1
if multiprocessing is not None:
class ChildLinter(multiprocessing.Process):
def run(self):
# pylint: disable=no-member, unbalanced-tuple-unpacking
tasks_queue, results_queue, self._config = self._args
self._config["jobs"] = 1 # Child does not parallelize any further.
self._python3_porting_mode = self._config.pop("python3_porting_mode", None)
self._plugins = self._config.pop("plugins", None)
# Run linter for received files/modules.
for file_or_module in iter(tasks_queue.get, "STOP"):
try:
result = self._run_linter(file_or_module[0])
results_queue.put(result)
except Exception as ex:
print(
"internal error with sending report for module %s"
% file_or_module,
file=sys.stderr,
)
print(ex, file=sys.stderr)
results_queue.put({})
def _run_linter(self, file_or_module):
linter = PyLinter()
# Register standard checkers.
linter.load_default_plugins()
# Load command line plugins.
if self._plugins:
linter.load_plugin_modules(self._plugins)
linter.load_configuration_from_config(self._config)
# Load plugin specific configuration
linter.load_plugin_configuration()
linter.set_reporter(reporters.CollectingReporter())
# Enable the Python 3 checker mode. This option is
# passed down from the parent linter up to here, since
# the Python 3 porting flag belongs to the Run class,
# instead of the Linter class.
if self._python3_porting_mode:
linter.python3_porting_mode()
# Run the checks.
linter.check(file_or_module)
msgs = [_get_new_args(m) for m in linter.reporter.messages]
return (
file_or_module,
linter.file_state.base_name,
linter.current_name,
msgs,
linter.stats,
linter.msg_status,
)
# pylint: disable=too-many-instance-attributes,too-many-public-methods
class PyLinter(
config.OptionsManagerMixIn,
MessagesHandlerMixIn,
reporters.ReportsHandlerMixIn,
checkers.BaseTokenChecker,
):
"""lint Python modules using external checkers.
This is the main checker controlling the other ones and the reports
generation. It is itself both a raw checker and an astroid checker in order
to:
* handle message activation / deactivation at the module level
* handle some basic but necessary stats'data (number of classes, methods...)
IDE plugin developers: you may have to call
`astroid.builder.MANAGER.astroid_cache.clear()` across runs if you want
to ensure the latest code version is actually checked.
"""
__implements__ = (interfaces.ITokenChecker,)
name = MAIN_CHECKER_NAME
priority = 0
level = 0
msgs = MSGS
@staticmethod
def make_options():
return (
(
"ignore",
{
"type": "csv",
"metavar": "<file>[,<file>...]",
"dest": "black_list",
"default": ("CVS",),
"help": "Add files or directories to the blacklist. "
"They should be base names, not paths.",
},
),
(
"ignore-patterns",
{
"type": "regexp_csv",
"metavar": "<pattern>[,<pattern>...]",
"dest": "black_list_re",
"default": (),
"help": "Add files or directories matching the regex patterns to the"
" blacklist. The regex matches against base names, not paths.",
},
),
(
"persistent",
{
"default": True,
"type": "yn",
"metavar": "<y_or_n>",
"level": 1,
"help": "Pickle collected data for later comparisons.",
},
),
(
"load-plugins",
{
"type": "csv",
"metavar": "<modules>",
"default": (),
"level": 1,
"help": "List of plugins (as comma separated values of "
"python module names) to load, usually to register "
"additional checkers.",
},
),
(
"output-format",
{
"default": "text",
"type": "string",
"metavar": "<format>",
"short": "f",
"group": "Reports",
"help": "Set the output format. Available formats are text,"
" parseable, colorized, json and msvs (visual studio)."
" You can also give a reporter class, e.g. mypackage.mymodule."
"MyReporterClass.",
},
),
(
"reports",
{
"default": False,
"type": "yn",
"metavar": "<y_or_n>",
"short": "r",
"group": "Reports",
"help": "Tells whether to display a full report or only the "
"messages.",
},
),
(
"evaluation",
{
"type": "string",
"metavar": "<python_expression>",
"group": "Reports",
"level": 1,
"default": "10.0 - ((float(5 * error + warning + refactor + "
"convention) / statement) * 10)",
"help": "Python expression which should return a score less "
"than or equal to 10. You have access to the variables "
"'error', 'warning', 'refactor', and 'convention' which "
"contain the number of messages in each category, as well as "
"'statement' which is the total number of statements "
"analyzed. This score is used by the global "
"evaluation report (RP0004).",
},
),
(
"score",
{
"default": True,
"type": "yn",
"metavar": "<y_or_n>",
"short": "s",
"group": "Reports",
"help": "Activate the evaluation score.",
},
),
(
"confidence",
{
"type": "multiple_choice",
"metavar": "<levels>",
"default": "",
"choices": [c.name for c in interfaces.CONFIDENCE_LEVELS],
"group": "Messages control",
"help": "Only show warnings with the listed confidence levels."
" Leave empty to show all. Valid levels: %s."
% (", ".join(c.name for c in interfaces.CONFIDENCE_LEVELS),),
},
),
(
"enable",
{
"type": "csv",
"metavar": "<msg ids>",
"short": "e",
"group": "Messages control",
"help": "Enable the message, report, category or checker with the "
"given id(s). You can either give multiple identifier "
"separated by comma (,) or put this option multiple time "
"(only on the command line, not in the configuration file "
"where it should appear only once). "
'See also the "--disable" option for examples.',
},
),
(
"disable",
{
"type": "csv",
"metavar": "<msg ids>",
"short": "d",
"group": "Messages control",
"help": "Disable the message, report, category or checker "
"with the given id(s). You can either give multiple identifiers "
"separated by comma (,) or put this option multiple times "
"(only on the command line, not in the configuration file "
"where it should appear only once). "
'You can also use "--disable=all" to disable everything first '
"and then reenable specific checks. For example, if you want "
"to run only the similarities checker, you can use "
'"--disable=all --enable=similarities". '
"If you want to run only the classes checker, but have no "
"Warning level messages displayed, use "
'"--disable=all --enable=classes --disable=W".',
},
),
(
"msg-template",
{
"type": "string",
"metavar": "<template>",
"group": "Reports",
"help": (
"Template used to display messages. "
"This is a python new-style format string "
"used to format the message information. "
"See doc for all details."
),
},
),
(
"jobs",
{
"type": "int",
"metavar": "<n-processes>",
"short": "j",
"default": 1,
"help": "Use multiple processes to speed up Pylint. Specifying 0 will "
"auto-detect the number of processors available to use.",
},
),
(
"unsafe-load-any-extension",
{
"type": "yn",
"metavar": "<yn>",
"default": False,
"hide": True,
"help": (
"Allow loading of arbitrary C extensions. Extensions"
" are imported into the active Python interpreter and"
" may run arbitrary code."
),
},
),
(
"limit-inference-results",
{
"type": "int",
"metavar": "<number-of-results>",
"default": 100,
"help": (
"Control the amount of potential inferred values when inferring "
"a single object. This can help the performance when dealing with "
"large functions or complex, nested conditions. "
),
},
),
(
"extension-pkg-whitelist",
{
"type": "csv",
"metavar": "<pkg[,pkg]>",
"default": [],
"help": (
"A comma-separated list of package or module names"
" from where C extensions may be loaded. Extensions are"
" loading into the active Python interpreter and may run"
" arbitrary code."
),
},
),
(
"suggestion-mode",
{
"type": "yn",
"metavar": "<yn>",
"default": True,
"help": (
"When enabled, pylint would attempt to guess common "
"misconfiguration and emit user-friendly hints instead "
"of false-positive error messages."
),
},
),
(
"exit-zero",
{
"action": "store_true",
"help": (
"Always return a 0 (non-error) status code, even if "
"lint errors are found. This is primarily useful in "
"continuous integration scripts."
),
},
),
(
"from-stdin",
{
"action": "store_true",
"help": (
"Interpret the stdin as a python script, whose filename "
"needs to be passed as the module_or_package argument."
),
},
),
)
option_groups = (
("Messages control", "Options controlling analysis messages"),
("Reports", "Options related to output formatting and reporting"),
)
def __init__(self, options=(), reporter=None, option_groups=(), pylintrc=None):
# some stuff has to be done before ancestors initialization...
#
# messages store / checkers / reporter / astroid manager
self.msgs_store = MessageDefinitionStore()
self.reporter = None
self._reporter_name = None
self._reporters = {}
self._checkers = collections.defaultdict(list)
self._pragma_lineno = {}
self._ignore_file = False
# visit variables
self.file_state = FileState()
self.current_name = None
self.current_file = None
self.stats = None
# init options
self._external_opts = options
self.options = options + PyLinter.make_options()
self.option_groups = option_groups + PyLinter.option_groups
self._options_methods = {"enable": self.enable, "disable": self.disable}
self._bw_options_methods = {
"disable-msg": self.disable,
"enable-msg": self.enable,
}
full_version = "pylint %s\nastroid %s\nPython %s" % (
version,
astroid_version,
sys.version,
)
MessagesHandlerMixIn.__init__(self)
reporters.ReportsHandlerMixIn.__init__(self)
super(PyLinter, self).__init__(
usage=__doc__,
version=full_version,
config_file=pylintrc or next(config.find_default_config_files(), None),
)
checkers.BaseTokenChecker.__init__(self)
# provided reports
self.reports = (
("RP0001", "Messages by category", report_total_messages_stats),
(
"RP0002",
"% errors / warnings by module",
report_messages_by_module_stats,
),
("RP0003", "Messages", report_messages_stats),
)
self.register_checker(self)
self._dynamic_plugins = set()
self._python3_porting_mode = False
self._error_mode = False
self.load_provider_defaults()
if reporter:
self.set_reporter(reporter)
def load_default_plugins(self):
checkers.initialize(self)
reporters.initialize(self)
# Make sure to load the default reporter, because
# the option has been set before the plugins had been loaded.
if not self.reporter:
self._load_reporter()
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:
if modname in self._dynamic_plugins:
continue
self._dynamic_plugins.add(modname)
module = modutils.load_module_from_name(modname)
module.register(self)
def load_plugin_configuration(self):
"""Call the configuration hook for plugins
This walks through the list of plugins, grabs the "load_configuration"
hook, if exposed, and calls it to allow plugins to configure specific
settings.
"""
for modname in self._dynamic_plugins:
module = modutils.load_module_from_name(modname)
if hasattr(module, "load_configuration"):
module.load_configuration(self)
def _load_reporter(self):
name = self._reporter_name.lower()
if name in self._reporters:
self.set_reporter(self._reporters[name]())
else:
try:
reporter_class = self._load_reporter_class()
except (ImportError, AttributeError):
raise exceptions.InvalidReporterError(name)
else:
self.set_reporter(reporter_class())
def _load_reporter_class(self):
qname = self._reporter_name
module = modutils.load_module_from_name(modutils.get_module_part(qname))
class_name = qname.split(".")[-1]
reporter_class = getattr(module, class_name)
return reporter_class
def set_reporter(self, reporter):
"""set the reporter used to display messages and reports"""
self.reporter = reporter
reporter.linter = self
def set_option(self, optname, value, action=None, optdict=None):
"""overridden from config.OptionsProviderMixin to handle some
special options
"""
if optname in self._options_methods or optname in self._bw_options_methods:
if value:
try:
meth = self._options_methods[optname]
except KeyError:
meth = self._bw_options_methods[optname]
warnings.warn(
"%s is deprecated, replace it by %s"
% (optname, optname.split("-")[0]),
DeprecationWarning,
)
value = utils._check_csv(value)
if isinstance(value, (list, tuple)):
for _id in value:
meth(_id, ignore_unknown=True)
else:
meth(value)
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 config.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_from_checker(checker)
checker.load_defaults()
# Register the checker, but disable all of its messages.
if not getattr(checker, "enabled", True):
self.disable(checker.name)
def disable_noerror_messages(self):
for msgcat, msgids in self.msgs_store._msgs_by_category.items():
# enable only messages with 'error' severity and above ('fatal')
if msgcat in ["E", "F"]:
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 self._reports.values():
for report_id, _, _ in _reporters:
self.disable_report(report_id)
def error_mode(self):
"""error mode: enable only errors; no reports, no persistent"""
self._error_mode = True
self.disable_noerror_messages()
self.disable("miscellaneous")
if self._python3_porting_mode:
self.disable("all")
for msg_id in self._checker_messages("python3"):
if msg_id.startswith("E"):
self.enable(msg_id)
config_parser = self.cfgfile_parser
if config_parser.has_option("MESSAGES CONTROL", "disable"):
value = config_parser.get("MESSAGES CONTROL", "disable")
self.global_set_option("disable", value)
else:
self.disable("python3")
self.set_option("reports", False)
self.set_option("persistent", False)
self.set_option("score", False)
def python3_porting_mode(self):
"""Disable all other checkers and enable Python 3 warnings."""
self.disable("all")
self.enable("python3")
if self._error_mode:
# The error mode was activated, using the -E flag.
# So we'll need to enable only the errors from the
# Python 3 porting checker.
for msg_id in self._checker_messages("python3"):
if msg_id.startswith("E"):
self.enable(msg_id)
else:
self.disable(msg_id)
config_parser = self.cfgfile_parser
if config_parser.has_option("MESSAGES CONTROL", "disable"):
value = config_parser.get("MESSAGES CONTROL", "disable")
self.global_set_option("disable", value)
self._python3_porting_mode = True
def list_messages_enabled(self):
enabled = [
" %s (%s)" % (message.symbol, message.msgid)
for message in self.msgs_store.messages
if self.is_message_enabled(message.msgid)
]
disabled = [
" %s (%s)" % (message.symbol, message.msgid)
for message in self.msgs_store.messages
if not self.is_message_enabled(message.msgid)
]
print("Enabled messages:")
for msg in sorted(enabled):
print(msg)
print("\nDisabled messages:")
for msg in sorted(disabled):
print(msg)
print("")
# 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"}
prev_line = None
saw_newline = True
seen_newline = True
for (tok_type, content, start, _, _) in tokens:
if prev_line and prev_line != start[0]:
saw_newline = seen_newline
seen_newline = False
prev_line = start[0]
if tok_type in (tokenize.NL, tokenize.NEWLINE):
seen_newline = True
if tok_type != tokenize.COMMENT:
continue
match = OPTION_RGX.search(content)
if match is None:
continue
first_group = match.group(1)
if (
first_group.strip() == "disable-all"
or first_group.strip() == "skip-file"
):
if first_group.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 = first_group.split("=", 1)
except ValueError:
self.add_message(
"bad-inline-option", args=first_group.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 suppression
self.add_message(
"deprecated-pragma",
line=start[0],
args=(opt, opt.replace("-msg", "")),
)
for msgid in utils._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
# If we did not see a newline between the previous line and now,
# we saw a backslash so treat the two lines as one.
if not saw_newline:
meth(msgid, "module", start[0] - 1)
meth(msgid, "module", start[0])
except exceptions.UnknownMessageError:
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 self._checkers.values()
for c in _checkers
if c is not self
]
def get_checker_names(self):
"""Get all the checker names that this linter knows about."""
current_checkers = self.get_checkers()
return sorted(
{
checker.name
for checker in current_checkers
if checker.name != MAIN_CHECKER_NAME
}
)
def prepare_checkers(self):
"""return checkers needed for activated messages and reports"""
if not self.config.reports:
self.disable_reporters()
# get needed checkers
needed_checkers = [self]
for checker in self.get_checkers()[1:]:
messages = {msg for msg in checker.msgs if self.is_message_enabled(msg)}
if messages or any(self.report_is_enabled(r[0]) for r in checker.reports):
needed_checkers.append(checker)
# Sort checkers by priority
needed_checkers = sorted(
needed_checkers, key=operator.attrgetter("priority"), reverse=True
)
return needed_checkers
# pylint: disable=unused-argument
@staticmethod
def should_analyze_file(modname, path, is_argument=False):
"""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.
:param bool is_argument: Whetter the file is an argument to pylint or not.
Files which respect this property are always
checked, since the user requested it explicitly.
:returns: True if the module should be checked.
:rtype: bool
"""
if is_argument:
return True
return path.endswith(".py")
# pylint: enable=unused-argument
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