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"""Plugin built-in to Flake8 to treat pyflakes as a plugin."""
import argparse
import ast
import os
import tokenize
from typing import Any
from typing import Generator
from typing import List
from typing import Tuple
from typing import Type
import pyflakes.checker
from flake8 import utils
from flake8.options.manager import OptionManager
FLAKE8_PYFLAKES_CODES = {
"UnusedImport": "F401",
"ImportShadowedByLoopVar": "F402",
"ImportStarUsed": "F403",
"LateFutureImport": "F404",
"ImportStarUsage": "F405",
"ImportStarNotPermitted": "F406",
"FutureFeatureNotDefined": "F407",
"PercentFormatInvalidFormat": "F501",
"PercentFormatExpectedMapping": "F502",
"PercentFormatExpectedSequence": "F503",
"PercentFormatExtraNamedArguments": "F504",
"PercentFormatMissingArgument": "F505",
"PercentFormatMixedPositionalAndNamed": "F506",
"PercentFormatPositionalCountMismatch": "F507",
"PercentFormatStarRequiresSequence": "F508",
"PercentFormatUnsupportedFormatCharacter": "F509",
"StringDotFormatInvalidFormat": "F521",
"StringDotFormatExtraNamedArguments": "F522",
"StringDotFormatExtraPositionalArguments": "F523",
"StringDotFormatMissingArgument": "F524",
"StringDotFormatMixingAutomatic": "F525",
"FStringMissingPlaceholders": "F541",
"MultiValueRepeatedKeyLiteral": "F601",
"MultiValueRepeatedKeyVariable": "F602",
"TooManyExpressionsInStarredAssignment": "F621",
"TwoStarredExpressions": "F622",
"AssertTuple": "F631",
"IsLiteral": "F632",
"InvalidPrintSyntax": "F633",
"IfTuple": "F634",
"BreakOutsideLoop": "F701",
"ContinueOutsideLoop": "F702",
"ContinueInFinally": "F703",
"YieldOutsideFunction": "F704",
"ReturnOutsideFunction": "F706",
"DefaultExceptNotLast": "F707",
"DoctestSyntaxError": "F721",
"ForwardAnnotationSyntaxError": "F722",
"CommentAnnotationSyntaxError": "F723",
"RedefinedWhileUnused": "F811",
"UndefinedName": "F821",
"UndefinedExport": "F822",
"UndefinedLocal": "F823",
"DuplicateArgument": "F831",
"UnusedVariable": "F841",
"RaiseNotImplemented": "F901",
}
class FlakesChecker(pyflakes.checker.Checker):
"""Subclass the Pyflakes checker to conform with the flake8 API."""
with_doctest = False
include_in_doctest: List[str] = []
exclude_from_doctest: List[str] = []
def __init__(
self,
tree: ast.AST,
file_tokens: List[tokenize.TokenInfo],
filename: str,
) -> None:
"""Initialize the PyFlakes plugin with an AST tree and filename."""
filename = utils.normalize_path(filename)
with_doctest = self.with_doctest
included_by = [
include
for include in self.include_in_doctest
if include != "" and filename.startswith(include)
]
if included_by:
with_doctest = True
for exclude in self.exclude_from_doctest:
if exclude != "" and filename.startswith(exclude):
with_doctest = False
overlaped_by = [
include
for include in included_by
if include.startswith(exclude)
]
if overlaped_by:
with_doctest = True
super().__init__(
tree,
filename=filename,
withDoctest=with_doctest,
file_tokens=file_tokens,
)
@classmethod
def add_options(cls, parser: OptionManager) -> None:
"""Register options for PyFlakes on the Flake8 OptionManager."""
parser.add_option(
"--builtins",
parse_from_config=True,
comma_separated_list=True,
help="define more built-ins, comma separated",
)
parser.add_option(
"--doctests",
default=False,
action="store_true",
parse_from_config=True,
help="also check syntax of the doctests",
)
parser.add_option(
"--include-in-doctest",
default="",
dest="include_in_doctest",
parse_from_config=True,
comma_separated_list=True,
normalize_paths=True,
help="Run doctests only on these files",
)
parser.add_option(
"--exclude-from-doctest",
default="",
dest="exclude_from_doctest",
parse_from_config=True,
comma_separated_list=True,
normalize_paths=True,
help="Skip these files when running doctests",
)
@classmethod
def parse_options(cls, options: argparse.Namespace) -> None:
"""Parse option values from Flake8's OptionManager."""
if options.builtins:
cls.builtIns = cls.builtIns.union(options.builtins)
cls.with_doctest = options.doctests
included_files = []
for included_file in options.include_in_doctest:
if included_file == "":
continue
if not included_file.startswith((os.sep, "./", "~/")):
included_files.append(f"./{included_file}")
else:
included_files.append(included_file)
cls.include_in_doctest = utils.normalize_paths(included_files)
excluded_files = []
for excluded_file in options.exclude_from_doctest:
if excluded_file == "":
continue
if not excluded_file.startswith((os.sep, "./", "~/")):
excluded_files.append(f"./{excluded_file}")
else:
excluded_files.append(excluded_file)
cls.exclude_from_doctest = utils.normalize_paths(excluded_files)
inc_exc = set(cls.include_in_doctest).intersection(
cls.exclude_from_doctest
)
if inc_exc:
raise ValueError(
f"{inc_exc!r} was specified in both the "
f"include-in-doctest and exclude-from-doctest "
f"options. You are not allowed to specify it in "
f"both for doctesting."
)
def run(self) -> Generator[Tuple[int, int, str, Type[Any]], None, None]:
"""Run the plugin."""
for message in self.messages:
col = getattr(message, "col", 0)
yield (
message.lineno,
col,
"{} {}".format(
FLAKE8_PYFLAKES_CODES.get(type(message).__name__, "F999"),
message.message % message.message_args,
),
message.__class__,
)
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