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# Copyright (c) 2009-2010, 2012-2013 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2013-2014 Google, Inc.
# Copyright (c) 2014 Michal Nowikowski <godfryd@gmail.com>
# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
# Copyright (c) 2015-2018, 2020 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
# Copyright (c) 2018 Ville Skyttä <ville.skytta@iki.fi>
# Copyright (c) 2020-2021 Pierre Sassoulas <pierre.sassoulas@gmail.com>
# Copyright (c) 2020 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2020 Anthony Sottile <asottile@umich.edu>
# Copyright (c) 2021 Daniël van Noord <13665637+DanielNoord@users.noreply.github.com>
# Copyright (c) 2021 Marc Mueller <30130371+cdce8p@users.noreply.github.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
"""Interfaces for Pylint objects"""
from collections import namedtuple
from typing import TYPE_CHECKING, Tuple
from astroid import nodes
if TYPE_CHECKING:
from pylint.reporters.ureports.nodes import Section
Confidence = namedtuple("Confidence", ["name", "description"])
# Warning Certainties
HIGH = Confidence("HIGH", "No false positive possible.")
INFERENCE = Confidence("INFERENCE", "Warning based on inference result.")
INFERENCE_FAILURE = Confidence(
"INFERENCE_FAILURE", "Warning based on inference with failures."
)
UNDEFINED = Confidence("UNDEFINED", "Warning without any associated confidence level.")
CONFIDENCE_LEVELS = [HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED]
class Interface:
"""Base class for interfaces."""
@classmethod
def is_implemented_by(cls, instance):
return implements(instance, cls)
def implements(obj: "Interface", interface: Tuple[type, type]) -> bool:
"""Return true if the give object (maybe an instance or class) implements
the interface.
"""
kimplements = getattr(obj, "__implements__", ())
if not isinstance(kimplements, (list, tuple)):
kimplements = (kimplements,)
for implementedinterface in kimplements:
if issubclass(implementedinterface, interface):
return True
return False
class IChecker(Interface):
"""This is a base interface, not designed to be used elsewhere than for
sub interfaces definition.
"""
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 IRawChecker(IChecker):
"""interface for checker which need to parse the raw file"""
def process_module(self, node: nodes.Module) -> None:
"""process a module
the module's content is accessible via astroid.stream
"""
class ITokenChecker(IChecker):
"""Interface for checkers that need access to the token list."""
def process_tokens(self, tokens):
"""Process a module.
tokens is a list of all source code tokens in the file.
"""
class IAstroidChecker(IChecker):
"""interface for checker which prefers receive events according to
statement type
"""
class IReporter(Interface):
"""reporter collect messages and display results encapsulated in a layout"""
def handle_message(self, msg) -> None:
"""Handle the given message object."""
def display_reports(self, layout: "Section") -> None:
"""display results encapsulated in the layout tree"""
__all__ = ("IRawChecker", "IAstroidChecker", "ITokenChecker", "IReporter", "IChecker")
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