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"""Plugin built-in to Flake8 to treat pyflakes as a plugin."""
import os
from typing import List
import pyflakes.checker
from flake8 import utils
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",
"ReturnWithArgsInsideGenerator": "F705",
"ReturnOutsideFunction": "F706",
"DefaultExceptNotLast": "F707",
"DoctestSyntaxError": "F721",
"ForwardAnnotationSyntaxError": "F722",
"CommentAnnotationSyntaxError": "F723",
"RedefinedWhileUnused": "F811",
"RedefinedInListComp": "F812",
"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."""
name = "pyflakes"
version = pyflakes.__version__
with_doctest = False
include_in_doctest: List[str] = []
exclude_from_doctest: List[str] = []
def __init__(self, tree, file_tokens, filename):
"""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):
"""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):
"""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):
"""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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