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# 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
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
from __future__ import annotations
try:
import isort.api
import isort.settings
HAS_ISORT_5 = True
except ImportError: # isort < 5
import isort
HAS_ISORT_5 = False
import argparse
import codecs
import os
import re
import sys
import textwrap
import tokenize
import warnings
from collections.abc import Sequence
from io import BufferedReader, BytesIO
from typing import (
TYPE_CHECKING,
Any,
List,
Pattern,
TextIO,
Tuple,
TypeVar,
Union,
overload,
)
from astroid import Module, modutils, nodes
from pylint.constants import PY_EXTS
from pylint.typing import OptionDict
if sys.version_info >= (3, 8):
from typing import Literal
else:
from typing_extensions import Literal
if TYPE_CHECKING:
from pylint.checkers.base_checker import BaseChecker
from pylint.lint import PyLinter
DEFAULT_LINE_LENGTH = 79
# These are types used to overload get_global_option() and refer to the options type
GLOBAL_OPTION_BOOL = Literal[
"suggestion-mode",
"analyse-fallback-blocks",
"allow-global-unused-variables",
]
GLOBAL_OPTION_INT = Literal["max-line-length", "docstring-min-length"]
GLOBAL_OPTION_LIST = Literal["ignored-modules"]
GLOBAL_OPTION_PATTERN = Literal[
"no-docstring-rgx",
"dummy-variables-rgx",
"ignored-argument-names",
"mixin-class-rgx",
]
GLOBAL_OPTION_PATTERN_LIST = Literal["exclude-too-few-public-methods", "ignore-paths"]
GLOBAL_OPTION_TUPLE_INT = Literal["py-version"]
GLOBAL_OPTION_NAMES = Union[
GLOBAL_OPTION_BOOL,
GLOBAL_OPTION_INT,
GLOBAL_OPTION_LIST,
GLOBAL_OPTION_PATTERN,
GLOBAL_OPTION_PATTERN_LIST,
GLOBAL_OPTION_TUPLE_INT,
]
T_GlobalOptionReturnTypes = TypeVar(
"T_GlobalOptionReturnTypes",
bool,
int,
List[str],
Pattern[str],
List[Pattern[str]],
Tuple[int, ...],
)
def normalize_text(
text: str, line_len: int = DEFAULT_LINE_LENGTH, indent: str = ""
) -> str:
"""Wrap the text on the given line length."""
return "\n".join(
textwrap.wrap(
text, width=line_len, initial_indent=indent, subsequent_indent=indent
)
)
CMPS = ["=", "-", "+"]
# py3k has no more cmp builtin
def cmp(a: int | float, b: int | float) -> int:
return (a > b) - (a < b)
def diff_string(old: int | float, new: int | float) -> str:
"""Given an old and new int value, return a string representing the
difference.
"""
diff = abs(old - new)
diff_str = f"{CMPS[cmp(old, new)]}{diff and f'{diff:.2f}' or ''}"
return diff_str
def get_module_and_frameid(node: nodes.NodeNG) -> tuple[str, str]:
"""Return the module name and the frame id in the module."""
frame = node.frame(future=True)
module, obj = "", []
while frame:
if isinstance(frame, Module):
module = frame.name
else:
obj.append(getattr(frame, "name", "<lambda>"))
try:
frame = frame.parent.frame(future=True)
except AttributeError:
break
obj.reverse()
return module, ".".join(obj)
def get_rst_title(title: str, character: str) -> str:
"""Permit to get a title formatted as ReStructuredText test (underlined with a
chosen character).
"""
return f"{title}\n{character * len(title)}\n"
def get_rst_section(
section: str | None,
options: list[tuple[str, OptionDict, Any]],
doc: str | None = None,
) -> str:
"""Format an option's section using as a ReStructuredText formatted output."""
result = ""
if section:
result += get_rst_title(section, "'")
if doc:
formatted_doc = normalize_text(doc)
result += f"{formatted_doc}\n\n"
for optname, optdict, value in options:
help_opt = optdict.get("help")
result += f":{optname}:\n"
if help_opt:
assert isinstance(help_opt, str)
formatted_help = normalize_text(help_opt, indent=" ")
result += f"{formatted_help}\n"
if value and optname != "py-version":
value = str(_format_option_value(optdict, value))
result += f"\n Default: ``{value.replace('`` ', '```` ``')}``\n"
return result
def decoding_stream(
stream: BufferedReader | BytesIO,
encoding: str,
errors: Literal["strict"] = "strict",
) -> codecs.StreamReader:
try:
reader_cls = codecs.getreader(encoding or sys.getdefaultencoding())
except LookupError:
reader_cls = codecs.getreader(sys.getdefaultencoding())
return reader_cls(stream, errors)
def tokenize_module(node: nodes.Module) -> list[tokenize.TokenInfo]:
with node.stream() as stream:
readline = stream.readline
return list(tokenize.tokenize(readline))
def register_plugins(linter: PyLinter, directory: str) -> None:
"""Load all module and package in the given directory, looking for a
'register' function in each one, used to register pylint checkers.
"""
imported = {}
for filename in os.listdir(directory):
base, extension = os.path.splitext(filename)
if base in imported or base == "__pycache__":
continue
if (
extension in PY_EXTS
and base != "__init__"
or (
not extension
and os.path.isdir(os.path.join(directory, base))
and not filename.startswith(".")
)
):
try:
module = modutils.load_module_from_file(
os.path.join(directory, filename)
)
except ValueError:
# empty module name (usually Emacs auto-save files)
continue
except ImportError as exc:
print(f"Problem importing module {filename}: {exc}", file=sys.stderr)
else:
if hasattr(module, "register"):
module.register(linter)
imported[base] = 1
@overload
def get_global_option(
checker: BaseChecker, option: GLOBAL_OPTION_BOOL, default: bool | None = ...
) -> bool:
...
@overload
def get_global_option(
checker: BaseChecker, option: GLOBAL_OPTION_INT, default: int | None = ...
) -> int:
...
@overload
def get_global_option(
checker: BaseChecker,
option: GLOBAL_OPTION_LIST,
default: list[str] | None = ...,
) -> list[str]:
...
@overload
def get_global_option(
checker: BaseChecker,
option: GLOBAL_OPTION_PATTERN,
default: Pattern[str] | None = ...,
) -> Pattern[str]:
...
@overload
def get_global_option(
checker: BaseChecker,
option: GLOBAL_OPTION_PATTERN_LIST,
default: list[Pattern[str]] | None = ...,
) -> list[Pattern[str]]:
...
@overload
def get_global_option(
checker: BaseChecker,
option: GLOBAL_OPTION_TUPLE_INT,
default: tuple[int, ...] | None = ...,
) -> tuple[int, ...]:
...
def get_global_option(
checker: BaseChecker,
option: GLOBAL_OPTION_NAMES,
default: T_GlobalOptionReturnTypes | None = None, # pylint: disable=unused-argument
) -> T_GlobalOptionReturnTypes | None | Any:
"""DEPRECATED: Retrieve an option defined by the given *checker* or
by all known option providers.
It will look in the list of all options providers
until the given *option* will be found.
If the option wasn't found, the *default* value will be returned.
"""
warnings.warn(
"get_global_option has been deprecated. You can use "
"checker.linter.config to get all global options instead.",
DeprecationWarning,
stacklevel=2,
)
return getattr(checker.linter.config, option.replace("-", "_"))
def _splitstrip(string: str, sep: str = ",") -> list[str]:
"""Return a list of stripped string by splitting the string given as
argument on `sep` (',' by default), empty strings are discarded.
>>> _splitstrip('a, b, c , 4,,')
['a', 'b', 'c', '4']
>>> _splitstrip('a')
['a']
>>> _splitstrip('a,\nb,\nc,')
['a', 'b', 'c']
:type string: str or unicode
:param string: a csv line
:type sep: str or unicode
:param sep: field separator, default to the comma (',')
:rtype: str or unicode
:return: the unquoted string (or the input string if it wasn't quoted)
"""
return [word.strip() for word in string.split(sep) if word.strip()]
def _unquote(string: str) -> str:
"""Remove optional quotes (simple or double) from the string.
:param string: an optionally quoted string
:return: the unquoted string (or the input string if it wasn't quoted)
"""
if not string:
return string
if string[0] in "\"'":
string = string[1:]
if string[-1] in "\"'":
string = string[:-1]
return string
def _check_csv(value: list[str] | tuple[str] | str) -> Sequence[str]:
if isinstance(value, (list, tuple)):
return value
return _splitstrip(value)
def _comment(string: str) -> str:
"""Return string as a comment."""
lines = [line.strip() for line in string.splitlines()]
sep = "\n"
return "# " + f"{sep}# ".join(lines)
def _format_option_value(optdict: OptionDict, value: Any) -> str:
"""Return the user input's value from a 'compiled' value.
TODO: 3.0: Remove deprecated function
"""
if optdict.get("type", None) == "py_version":
value = ".".join(str(item) for item in value)
elif isinstance(value, (list, tuple)):
value = ",".join(_format_option_value(optdict, item) for item in value)
elif isinstance(value, dict):
value = ",".join(f"{k}:{v}" for k, v in value.items())
elif hasattr(value, "match"): # optdict.get('type') == 'regexp'
# compiled regexp
value = value.pattern
elif optdict.get("type") == "yn":
value = "yes" if value else "no"
elif isinstance(value, str) and value.isspace():
value = f"'{value}'"
return str(value)
def format_section(
stream: TextIO,
section: str,
options: list[tuple[str, OptionDict, Any]],
doc: str | None = None,
) -> None:
"""Format an option's section using the INI format."""
warnings.warn(
"format_section has been deprecated. It will be removed in pylint 3.0.",
DeprecationWarning,
stacklevel=2,
)
if doc:
print(_comment(doc), file=stream)
print(f"[{section}]", file=stream)
with warnings.catch_warnings():
warnings.filterwarnings("ignore", category=DeprecationWarning)
_ini_format(stream, options)
def _ini_format(stream: TextIO, options: list[tuple[str, OptionDict, Any]]) -> None:
"""Format options using the INI format."""
warnings.warn(
"_ini_format has been deprecated. It will be removed in pylint 3.0.",
DeprecationWarning,
stacklevel=2,
)
for optname, optdict, value in options:
# Skip deprecated option
if "kwargs" in optdict:
assert isinstance(optdict["kwargs"], dict)
if "new_names" in optdict["kwargs"]:
continue
value = _format_option_value(optdict, value)
help_opt = optdict.get("help")
if help_opt:
assert isinstance(help_opt, str)
help_opt = normalize_text(help_opt, indent="# ")
print(file=stream)
print(help_opt, file=stream)
else:
print(file=stream)
if value in {"None", "False"}:
print(f"#{optname}=", file=stream)
else:
value = str(value).strip()
if re.match(r"^([\w-]+,)+[\w-]+$", str(value)):
separator = "\n " + " " * len(optname)
value = separator.join(x + "," for x in str(value).split(","))
# remove trailing ',' from last element of the list
value = value[:-1]
print(f"{optname}={value}", file=stream)
class IsortDriver:
"""A wrapper around isort API that changed between versions 4 and 5."""
def __init__(self, config: argparse.Namespace) -> None:
if HAS_ISORT_5:
self.isort5_config = isort.settings.Config(
# There is no typo here. EXTRA_standard_library is
# what most users want. The option has been named
# KNOWN_standard_library for ages in pylint, and we
# don't want to break compatibility.
extra_standard_library=config.known_standard_library,
known_third_party=config.known_third_party,
)
else:
# pylint: disable-next=no-member
self.isort4_obj = isort.SortImports( # type: ignore[attr-defined]
file_contents="",
known_standard_library=config.known_standard_library,
known_third_party=config.known_third_party,
)
def place_module(self, package: str) -> str:
if HAS_ISORT_5:
return isort.api.place_module(package, self.isort5_config)
return self.isort4_obj.place_module(package) # type: ignore[no-any-return]
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