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# Copyright (c) 2006-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2013-2014 Google, Inc.
# Copyright (c) 2013 buck@yelp.com <buck@yelp.com>
# Copyright (c) 2014-2017 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014 Brett Cannon <brett@python.org>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Moises Lopez <moylop260@vauxoo.com>
# Copyright (c) 2017-2018 Bryce Guinta <bryce.paul.guinta@gmail.com>
# 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
"""utilities methods and classes for checkers
Base id of standard checkers (used in msg and report ids):
01: base
02: classes
03: format
04: import
05: misc
06: variables
07: exceptions
08: similar
09: design_analysis
10: newstyle
11: typecheck
12: logging
13: string_format
14: string_constant
15: stdlib
16: python3
17: refactoring
18-50: not yet used: reserved for future internal checkers.
51-99: perhaps used: reserved for external checkers
The raw_metrics checker has no number associated since it doesn't emit any
messages nor reports. XXX not true, emit a 07 report !
"""
import sys
import tokenize
import warnings
from typing import Any
from pylint.config import OptionsProviderMixIn
from pylint.reporters import diff_string
from pylint.utils import register_plugins
from pylint.interfaces import UNDEFINED
def table_lines_from_stats(stats, old_stats, columns):
"""get values listed in <columns> from <stats> and <old_stats>,
and return a formated list of values, designed to be given to a
ureport.Table object
"""
lines = []
for m_type in columns:
new = stats[m_type]
format = str # pylint: disable=redefined-builtin
if isinstance(new, float):
format = lambda num: "%.3f" % num
old = old_stats.get(m_type)
if old is not None:
diff_str = diff_string(old, new)
old = format(old)
else:
old, diff_str = "NC", "NC"
lines += (m_type.replace("_", " "), format(new), old, diff_str)
return lines
class BaseChecker(OptionsProviderMixIn):
"""base class for checkers"""
# checker name (you may reuse an existing one)
name = None # type: str
# options level (0 will be displaying in --help, 1 in --long-help)
level = 1
# ordered list of options to control the ckecker behaviour
options = () # type: Any
# messages issued by this checker
msgs = {} # type: Any
# reports issued by this checker
reports = () # type: Any
# mark this checker as enabled or not.
enabled = True
def __init__(self, linter=None):
"""checker instances should have the linter as argument
linter is an object implementing ILinter
"""
if self.name is not None:
self.name = self.name.lower()
OptionsProviderMixIn.__init__(self)
self.linter = linter
def add_message(
self,
msg_id,
line=None,
node=None,
args=None,
confidence=UNDEFINED,
col_offset=None,
):
"""add a message of a given type"""
self.linter.add_message(msg_id, line, node, args, confidence, col_offset)
# dummy methods implementing the IChecker interface
def open(self):
"""called before visiting project (i.e set of modules)"""
def close(self):
"""called after visiting project (i.e set of modules)"""
class BaseTokenChecker(BaseChecker):
"""Base class for checkers that want to have access to the token stream."""
def process_tokens(self, tokens):
"""Should be overridden by subclasses."""
raise NotImplementedError()
def initialize(linter):
"""initialize linter with checkers in this package """
register_plugins(linter, __path__[0])
__all__ = ("BaseChecker", "initialize")
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