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"""isort/settings.py.
Defines how the default settings for isort should be loaded
"""
import configparser
import fnmatch
import os
import posixpath
import re
import stat
import subprocess # nosec: Needed for gitignore support.
import sys
from functools import lru_cache
from pathlib import Path
from typing import Any, Callable, Dict, FrozenSet, Iterable, List, Optional, Pattern, Set, Tuple
from warnings import warn
from . import stdlibs
from ._future import dataclass, field
import toml
from .exceptions import (
FormattingPluginDoesNotExist,
InvalidSettingsPath,
ProfileDoesNotExist,
UnsupportedSettings,
)
from .profiles import profiles
from .sections import DEFAULT as SECTION_DEFAULTS
from .sections import FIRSTPARTY, FUTURE, LOCALFOLDER, STDLIB, THIRDPARTY
from .wrap_modes import WrapModes
from .wrap_modes import from_string as wrap_mode_from_string
_SHEBANG_RE = re.compile(br"^#!.*\bpython[23w]?\b")
SUPPORTED_EXTENSIONS = frozenset({"py", "pyi", "pyx", "pxd"})
BLOCKED_EXTENSIONS = frozenset({"pex"})
FILE_SKIP_COMMENTS: Tuple[str, ...] = (
"isort:" + "skip_file",
"isort: " + "skip_file",
) # Concatenated to avoid this file being skipped
MAX_CONFIG_SEARCH_DEPTH: int = 25 # The number of parent directories to for a config file within
STOP_CONFIG_SEARCH_ON_DIRS: Tuple[str, ...] = (".git", ".hg")
VALID_PY_TARGETS: Tuple[str, ...] = tuple(
target.replace("py", "") for target in dir(stdlibs) if not target.startswith("_")
)
CONFIG_SOURCES: Tuple[str, ...] = (
".isort.cfg",
"pyproject.toml",
"setup.cfg",
"tox.ini",
".editorconfig",
)
DEFAULT_SKIP: FrozenSet[str] = frozenset(
{
".venv",
"venv",
".tox",
".eggs",
".git",
".hg",
".mypy_cache",
".nox",
".svn",
".bzr",
"_build",
"buck-out",
"build",
"dist",
".pants.d",
".direnv",
"node_modules",
}
)
CONFIG_SECTIONS: Dict[str, Tuple[str, ...]] = {
".isort.cfg": ("settings", "isort"),
"pyproject.toml": ("tool.isort",),
"setup.cfg": ("isort", "tool:isort"),
"tox.ini": ("isort", "tool:isort"),
".editorconfig": ("*", "*.py", "**.py", "*.{py}"),
}
FALLBACK_CONFIG_SECTIONS: Tuple[str, ...] = ("isort", "tool:isort", "tool.isort")
IMPORT_HEADING_PREFIX = "import_heading_"
KNOWN_PREFIX = "known_"
KNOWN_SECTION_MAPPING: Dict[str, str] = {
STDLIB: "STANDARD_LIBRARY",
FUTURE: "FUTURE_LIBRARY",
FIRSTPARTY: "FIRST_PARTY",
THIRDPARTY: "THIRD_PARTY",
LOCALFOLDER: "LOCAL_FOLDER",
}
RUNTIME_SOURCE = "runtime"
DEPRECATED_SETTINGS = ("not_skip", "keep_direct_and_as_imports")
_STR_BOOLEAN_MAPPING = {
"y": True,
"yes": True,
"t": True,
"on": True,
"1": True,
"true": True,
"n": False,
"no": False,
"f": False,
"off": False,
"0": False,
"false": False,
}
@dataclass(frozen=True)
class _Config:
"""Defines the data schema and defaults used for isort configuration.
NOTE: known lists, such as known_standard_library, are intentionally not complete as they are
dynamically determined later on.
"""
py_version: str = "3"
force_to_top: FrozenSet[str] = frozenset()
skip: FrozenSet[str] = DEFAULT_SKIP
skip_glob: FrozenSet[str] = frozenset()
skip_gitignore: bool = False
line_length: int = 79
wrap_length: int = 0
line_ending: str = ""
sections: Tuple[str, ...] = SECTION_DEFAULTS
no_sections: bool = False
known_future_library: FrozenSet[str] = frozenset(("__future__",))
known_third_party: FrozenSet[str] = frozenset()
known_first_party: FrozenSet[str] = frozenset()
known_local_folder: FrozenSet[str] = frozenset()
known_standard_library: FrozenSet[str] = frozenset()
extra_standard_library: FrozenSet[str] = frozenset()
known_other: Dict[str, FrozenSet[str]] = field(default_factory=dict)
multi_line_output: WrapModes = WrapModes.GRID # type: ignore
forced_separate: Tuple[str, ...] = ()
indent: str = " " * 4
comment_prefix: str = " #"
length_sort: bool = False
length_sort_straight: bool = False
length_sort_sections: FrozenSet[str] = frozenset()
add_imports: FrozenSet[str] = frozenset()
remove_imports: FrozenSet[str] = frozenset()
append_only: bool = False
reverse_relative: bool = False
force_single_line: bool = False
single_line_exclusions: Tuple[str, ...] = ()
default_section: str = THIRDPARTY
import_headings: Dict[str, str] = field(default_factory=dict)
balanced_wrapping: bool = False
use_parentheses: bool = False
order_by_type: bool = True
atomic: bool = False
lines_after_imports: int = -1
lines_between_sections: int = 1
lines_between_types: int = 0
combine_as_imports: bool = False
combine_star: bool = False
include_trailing_comma: bool = False
from_first: bool = False
verbose: bool = False
quiet: bool = False
force_adds: bool = False
force_alphabetical_sort_within_sections: bool = False
force_alphabetical_sort: bool = False
force_grid_wrap: int = 0
force_sort_within_sections: bool = False
lexicographical: bool = False
group_by_package: bool = False
ignore_whitespace: bool = False
no_lines_before: FrozenSet[str] = frozenset()
no_inline_sort: bool = False
ignore_comments: bool = False
case_sensitive: bool = False
sources: Tuple[Dict[str, Any], ...] = ()
virtual_env: str = ""
conda_env: str = ""
ensure_newline_before_comments: bool = False
directory: str = ""
profile: str = ""
honor_noqa: bool = False
src_paths: Tuple[Path, ...] = ()
old_finders: bool = False
remove_redundant_aliases: bool = False
float_to_top: bool = False
filter_files: bool = False
formatter: str = ""
formatting_function: Optional[Callable[[str, str, object], str]] = None
color_output: bool = False
treat_comments_as_code: FrozenSet[str] = frozenset()
treat_all_comments_as_code: bool = False
supported_extensions: FrozenSet[str] = SUPPORTED_EXTENSIONS
blocked_extensions: FrozenSet[str] = BLOCKED_EXTENSIONS
constants: FrozenSet[str] = frozenset()
classes: FrozenSet[str] = frozenset()
variables: FrozenSet[str] = frozenset()
dedup_headings: bool = False
only_sections: bool = False
only_modified: bool = False
auto_identify_namespace_packages: bool = True
namespace_packages: FrozenSet[str] = frozenset()
def __post_init__(self):
py_version = self.py_version
if py_version == "auto": # pragma: no cover
if sys.version_info.major == 2 and sys.version_info.minor <= 6:
py_version = "2"
elif sys.version_info.major == 3 and (
sys.version_info.minor <= 5 or sys.version_info.minor >= 9
):
py_version = "3"
else:
py_version = f"{sys.version_info.major}{sys.version_info.minor}"
if py_version not in VALID_PY_TARGETS:
raise ValueError(
f"The python version {py_version} is not supported. "
"You can set a python version with the -py or --python-version flag. "
f"The following versions are supported: {VALID_PY_TARGETS}"
)
if py_version != "all":
object.__setattr__(self, "py_version", f"py{py_version}")
if not self.known_standard_library:
object.__setattr__(
self, "known_standard_library", frozenset(getattr(stdlibs, self.py_version).stdlib)
)
if self.force_alphabetical_sort:
object.__setattr__(self, "force_alphabetical_sort_within_sections", True)
object.__setattr__(self, "no_sections", True)
object.__setattr__(self, "lines_between_types", 1)
object.__setattr__(self, "from_first", True)
if self.wrap_length > self.line_length:
raise ValueError(
"wrap_length must be set lower than or equal to line_length: "
f"{self.wrap_length} > {self.line_length}."
)
def __hash__(self):
return id(self)
_DEFAULT_SETTINGS = {**vars(_Config()), "source": "defaults"}
class Config(_Config):
def __init__(
self,
settings_file: str = "",
settings_path: str = "",
config: Optional[_Config] = None,
**config_overrides,
):
self._known_patterns: Optional[List[Tuple[Pattern[str], str]]] = None
self._section_comments: Optional[Tuple[str, ...]] = None
if config:
config_vars = vars(config).copy()
config_vars.update(config_overrides)
config_vars["py_version"] = config_vars["py_version"].replace("py", "")
config_vars.pop("_known_patterns")
config_vars.pop("_section_comments")
super().__init__(**config_vars) # type: ignore
return
# We can't use self.quiet to conditionally show warnings before super.__init__() is called
# at the end of this method. _Config is also frozen so setting self.quiet isn't possible.
# Therefore we extract quiet early here in a variable and use that in warning conditions.
quiet = config_overrides.get("quiet", False)
sources: List[Dict[str, Any]] = [_DEFAULT_SETTINGS]
config_settings: Dict[str, Any]
project_root: str
if settings_file:
config_settings = _get_config_data(
settings_file,
CONFIG_SECTIONS.get(os.path.basename(settings_file), FALLBACK_CONFIG_SECTIONS),
)
project_root = os.path.dirname(settings_file)
if not config_settings and not quiet:
warn(
f"A custom settings file was specified: {settings_file} but no configuration "
"was found inside. This can happen when [settings] is used as the config "
"header instead of [isort]. "
"See: https://pycqa.github.io/isort/docs/configuration/config_files"
"/#custom_config_files for more information."
)
elif settings_path:
if not os.path.exists(settings_path):
raise InvalidSettingsPath(settings_path)
settings_path = os.path.abspath(settings_path)
project_root, config_settings = _find_config(settings_path)
else:
config_settings = {}
project_root = os.getcwd()
profile_name = config_overrides.get("profile", config_settings.get("profile", ""))
profile: Dict[str, Any] = {}
if profile_name:
if profile_name not in profiles:
import pkg_resources
for plugin in pkg_resources.iter_entry_points("isort.profiles"):
profiles.setdefault(plugin.name, plugin.load())
if profile_name not in profiles:
raise ProfileDoesNotExist(profile_name)
profile = profiles[profile_name].copy()
profile["source"] = f"{profile_name} profile"
sources.append(profile)
if config_settings:
sources.append(config_settings)
if config_overrides:
config_overrides["source"] = RUNTIME_SOURCE
sources.append(config_overrides)
combined_config = {**profile, **config_settings, **config_overrides}
if "indent" in combined_config:
indent = str(combined_config["indent"])
if indent.isdigit():
indent = " " * int(indent)
else:
indent = indent.strip("'").strip('"')
if indent.lower() == "tab":
indent = "\t"
combined_config["indent"] = indent
known_other = {}
import_headings = {}
for key, value in tuple(combined_config.items()):
# Collect all known sections beyond those that have direct entries
if key.startswith(KNOWN_PREFIX) and key not in (
"known_standard_library",
"known_future_library",
"known_third_party",
"known_first_party",
"known_local_folder",
):
import_heading = key[len(KNOWN_PREFIX) :].lower()
maps_to_section = import_heading.upper()
combined_config.pop(key)
if maps_to_section in KNOWN_SECTION_MAPPING:
section_name = f"known_{KNOWN_SECTION_MAPPING[maps_to_section].lower()}"
if section_name in combined_config and not quiet:
warn(
f"Can't set both {key} and {section_name} in the same config file.\n"
f"Default to {section_name} if unsure."
"\n\n"
"See: https://pycqa.github.io/isort/"
"#custom-sections-and-ordering."
)
else:
combined_config[section_name] = frozenset(value)
else:
known_other[import_heading] = frozenset(value)
if maps_to_section not in combined_config.get("sections", ()) and not quiet:
warn(
f"`{key}` setting is defined, but {maps_to_section} is not"
" included in `sections` config option:"
f" {combined_config.get('sections', SECTION_DEFAULTS)}.\n\n"
"See: https://pycqa.github.io/isort/"
"#custom-sections-and-ordering."
)
if key.startswith(IMPORT_HEADING_PREFIX):
import_headings[key[len(IMPORT_HEADING_PREFIX) :].lower()] = str(value)
# Coerce all provided config values into their correct type
default_value = _DEFAULT_SETTINGS.get(key, None)
if default_value is None:
continue
combined_config[key] = type(default_value)(value)
for section in combined_config.get("sections", ()):
if section in SECTION_DEFAULTS:
continue
elif not section.lower() in known_other:
config_keys = ", ".join(known_other.keys())
warn(
f"`sections` setting includes {section}, but no known_{section.lower()} "
"is defined. "
f"The following known_SECTION config options are defined: {config_keys}."
)
if "directory" not in combined_config:
combined_config["directory"] = (
os.path.dirname(config_settings["source"])
if config_settings.get("source", None)
else os.getcwd()
)
path_root = Path(combined_config.get("directory", project_root)).resolve()
path_root = path_root if path_root.is_dir() else path_root.parent
if "src_paths" not in combined_config:
combined_config["src_paths"] = (path_root / "src", path_root)
else:
src_paths: List[Path] = []
for src_path in combined_config.get("src_paths", ()):
full_path = path_root / src_path
if full_path not in src_paths:
src_paths.append(full_path)
combined_config["src_paths"] = tuple(src_paths)
if "formatter" in combined_config:
import pkg_resources
for plugin in pkg_resources.iter_entry_points("isort.formatters"):
if plugin.name == combined_config["formatter"]:
combined_config["formatting_function"] = plugin.load()
break
else:
raise FormattingPluginDoesNotExist(combined_config["formatter"])
# Remove any config values that are used for creating config object but
# aren't defined in dataclass
combined_config.pop("source", None)
combined_config.pop("sources", None)
combined_config.pop("runtime_src_paths", None)
deprecated_options_used = [
option for option in combined_config if option in DEPRECATED_SETTINGS
]
if deprecated_options_used:
for deprecated_option in deprecated_options_used:
combined_config.pop(deprecated_option)
if not quiet:
warn(
"W0503: Deprecated config options were used: "
f"{', '.join(deprecated_options_used)}."
"Please see the 5.0.0 upgrade guide: bit.ly/isortv5."
)
if known_other:
combined_config["known_other"] = known_other
if import_headings:
for import_heading_key in import_headings:
combined_config.pop(f"{IMPORT_HEADING_PREFIX}{import_heading_key}")
combined_config["import_headings"] = import_headings
unsupported_config_errors = {}
for option in set(combined_config.keys()).difference(
getattr(_Config, "__dataclass_fields__", {}).keys()
):
for source in reversed(sources):
if option in source:
unsupported_config_errors[option] = {
"value": source[option],
"source": source["source"],
}
if unsupported_config_errors:
raise UnsupportedSettings(unsupported_config_errors)
super().__init__(sources=tuple(sources), **combined_config) # type: ignore
def is_supported_filetype(self, file_name: str):
_root, ext = os.path.splitext(file_name)
ext = ext.lstrip(".")
if ext in self.supported_extensions:
return True
elif ext in self.blocked_extensions:
return False
# Skip editor backup files.
if file_name.endswith("~"):
return False
try:
if stat.S_ISFIFO(os.stat(file_name).st_mode):
return False
except OSError:
pass
try:
with open(file_name, "rb") as fp:
line = fp.readline(100)
except OSError:
return False
else:
return bool(_SHEBANG_RE.match(line))
def is_skipped(self, file_path: Path) -> bool:
"""Returns True if the file and/or folder should be skipped based on current settings."""
if self.directory and Path(self.directory) in file_path.resolve().parents:
file_name = os.path.relpath(file_path.resolve(), self.directory)
else:
file_name = str(file_path)
os_path = str(file_path)
if self.skip_gitignore:
if file_path.name == ".git": # pragma: no cover
return True
result = subprocess.run( # nosec
["git", "-C", str(file_path.parent), "check-ignore", "--quiet", os_path]
)
if result.returncode == 0:
return True
normalized_path = os_path.replace("\\", "/")
if normalized_path[1:2] == ":":
normalized_path = normalized_path[2:]
for skip_path in self.skip:
if posixpath.abspath(normalized_path) == posixpath.abspath(
skip_path.replace("\\", "/")
):
return True
position = os.path.split(file_name)
while position[1]:
if position[1] in self.skip:
return True
position = os.path.split(position[0])
for glob in self.skip_glob:
if fnmatch.fnmatch(file_name, glob) or fnmatch.fnmatch("/" + file_name, glob):
return True
if not (os.path.isfile(os_path) or os.path.isdir(os_path) or os.path.islink(os_path)):
return True
return False
@property
def known_patterns(self):
if self._known_patterns is not None:
return self._known_patterns
self._known_patterns = []
pattern_sections = [STDLIB] + [section for section in self.sections if section != STDLIB]
for placement in reversed(pattern_sections):
known_placement = KNOWN_SECTION_MAPPING.get(placement, placement).lower()
config_key = f"{KNOWN_PREFIX}{known_placement}"
known_modules = getattr(self, config_key, self.known_other.get(known_placement, ()))
extra_modules = getattr(self, f"extra_{known_placement}", ())
all_modules = set(extra_modules).union(known_modules)
known_patterns = [
pattern
for known_pattern in all_modules
for pattern in self._parse_known_pattern(known_pattern)
]
for known_pattern in known_patterns:
regexp = "^" + known_pattern.replace("*", ".*").replace("?", ".?") + "$"
self._known_patterns.append((re.compile(regexp), placement))
return self._known_patterns
@property
def section_comments(self) -> Tuple[str, ...]:
if self._section_comments is not None:
return self._section_comments
self._section_comments = tuple(f"# {heading}" for heading in self.import_headings.values())
return self._section_comments
def _parse_known_pattern(self, pattern: str) -> List[str]:
"""Expand pattern if identified as a directory and return found sub packages"""
if pattern.endswith(os.path.sep):
patterns = [
filename
for filename in os.listdir(os.path.join(self.directory, pattern))
if os.path.isdir(os.path.join(self.directory, pattern, filename))
]
else:
patterns = [pattern]
return patterns
def _get_str_to_type_converter(setting_name: str) -> Callable[[str], Any]:
type_converter: Callable[[str], Any] = type(_DEFAULT_SETTINGS.get(setting_name, ""))
if type_converter == WrapModes:
type_converter = wrap_mode_from_string
return type_converter
def _as_list(value: str) -> List[str]:
if isinstance(value, list):
return [item.strip() for item in value]
filtered = [item.strip() for item in value.replace("\n", ",").split(",") if item.strip()]
return filtered
def _abspaths(cwd: str, values: Iterable[str]) -> Set[str]:
paths = {
os.path.join(cwd, value)
if not value.startswith(os.path.sep) and value.endswith(os.path.sep)
else value
for value in values
}
return paths
@lru_cache()
def _find_config(path: str) -> Tuple[str, Dict[str, Any]]:
current_directory = path
tries = 0
while current_directory and tries < MAX_CONFIG_SEARCH_DEPTH:
for config_file_name in CONFIG_SOURCES:
potential_config_file = os.path.join(current_directory, config_file_name)
if os.path.isfile(potential_config_file):
config_data: Dict[str, Any]
try:
config_data = _get_config_data(
potential_config_file, CONFIG_SECTIONS[config_file_name]
)
except Exception:
warn(f"Failed to pull configuration information from {potential_config_file}")
config_data = {}
if config_data:
return (current_directory, config_data)
for stop_dir in STOP_CONFIG_SEARCH_ON_DIRS:
if os.path.isdir(os.path.join(current_directory, stop_dir)):
return (current_directory, {})
new_directory = os.path.split(current_directory)[0]
if new_directory == current_directory:
break
current_directory = new_directory
tries += 1
return (path, {})
@lru_cache()
def _get_config_data(file_path: str, sections: Tuple[str]) -> Dict[str, Any]:
settings: Dict[str, Any] = {}
with open(file_path) as config_file:
if file_path.endswith(".toml"):
config = toml.load(config_file)
for section in sections:
config_section = config
for key in section.split("."):
config_section = config_section.get(key, {})
settings.update(config_section)
else:
if file_path.endswith(".editorconfig"):
line = "\n"
last_position = config_file.tell()
while line:
line = config_file.readline()
if "[" in line:
config_file.seek(last_position)
break
last_position = config_file.tell()
config = configparser.ConfigParser(strict=False)
config.read_file(config_file)
for section in sections:
if section.startswith("*.{") and section.endswith("}"):
extension = section[len("*.{") : -1]
for config_key in config.keys():
if config_key.startswith("*.{") and config_key.endswith("}"):
if extension in map(
lambda text: text.strip(), config_key[len("*.{") : -1].split(",")
):
settings.update(config.items(config_key))
elif config.has_section(section):
settings.update(config.items(section))
if settings:
settings["source"] = file_path
if file_path.endswith(".editorconfig"):
indent_style = settings.pop("indent_style", "").strip()
indent_size = settings.pop("indent_size", "").strip()
if indent_size == "tab":
indent_size = settings.pop("tab_width", "").strip()
if indent_style == "space":
settings["indent"] = " " * (indent_size and int(indent_size) or 4)
elif indent_style == "tab":
settings["indent"] = "\t" * (indent_size and int(indent_size) or 1)
max_line_length = settings.pop("max_line_length", "").strip()
if max_line_length and (max_line_length == "off" or max_line_length.isdigit()):
settings["line_length"] = (
float("inf") if max_line_length == "off" else int(max_line_length)
)
settings = {
key: value
for key, value in settings.items()
if key in _DEFAULT_SETTINGS.keys() or key.startswith(KNOWN_PREFIX)
}
for key, value in settings.items():
existing_value_type = _get_str_to_type_converter(key)
if existing_value_type == tuple:
settings[key] = tuple(_as_list(value))
elif existing_value_type == frozenset:
settings[key] = frozenset(_as_list(settings.get(key))) # type: ignore
elif existing_value_type == bool:
# Only some configuration formats support native boolean values.
if not isinstance(value, bool):
value = _as_bool(value)
settings[key] = value
elif key.startswith(KNOWN_PREFIX):
settings[key] = _abspaths(os.path.dirname(file_path), _as_list(value))
elif key == "force_grid_wrap":
try:
result = existing_value_type(value)
except ValueError: # backwards compatibility for true / false force grid wrap
result = 0 if value.lower().strip() == "false" else 2
settings[key] = result
elif key == "comment_prefix":
settings[key] = str(value).strip("'").strip('"')
else:
settings[key] = existing_value_type(value)
return settings
def _as_bool(value: str) -> bool:
"""Given a string value that represents True or False, returns the Boolean equivalent.
Heavily inspired from distutils strtobool.
"""
try:
return _STR_BOOLEAN_MAPPING[value.lower()]
except KeyError:
raise ValueError(f"invalid truth value {value}")
DEFAULT_CONFIG = Config()
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