770 lines
25 KiB
Python
770 lines
25 KiB
Python
"""
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Load setuptools configuration from ``setup.cfg`` files.
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**API will be made private in the future**
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"""
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import os
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import contextlib
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import functools
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import warnings
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from collections import defaultdict
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from functools import partial
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from functools import wraps
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from typing import (TYPE_CHECKING, Callable, Any, Dict, Generic, Iterable, List,
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Optional, Set, Tuple, TypeVar, Union)
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from distutils.errors import DistutilsOptionError, DistutilsFileError
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from setuptools.extern.packaging.requirements import Requirement, InvalidRequirement
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from setuptools.extern.packaging.version import Version, InvalidVersion
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from setuptools.extern.packaging.specifiers import SpecifierSet
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from setuptools._deprecation_warning import SetuptoolsDeprecationWarning
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from . import expand
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if TYPE_CHECKING:
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from setuptools.dist import Distribution # noqa
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from distutils.dist import DistributionMetadata # noqa
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_Path = Union[str, os.PathLike]
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SingleCommandOptions = Dict["str", Tuple["str", Any]]
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"""Dict that associate the name of the options of a particular command to a
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tuple. The first element of the tuple indicates the origin of the option value
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(e.g. the name of the configuration file where it was read from),
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while the second element of the tuple is the option value itself
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"""
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AllCommandOptions = Dict["str", SingleCommandOptions] # cmd name => its options
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Target = TypeVar("Target", bound=Union["Distribution", "DistributionMetadata"])
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def read_configuration(
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filepath: _Path,
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find_others=False,
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ignore_option_errors=False
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) -> dict:
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"""Read given configuration file and returns options from it as a dict.
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:param str|unicode filepath: Path to configuration file
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to get options from.
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:param bool find_others: Whether to search for other configuration files
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which could be on in various places.
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:param bool ignore_option_errors: Whether to silently ignore
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options, values of which could not be resolved (e.g. due to exceptions
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in directives such as file:, attr:, etc.).
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If False exceptions are propagated as expected.
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:rtype: dict
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"""
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from setuptools.dist import Distribution
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dist = Distribution()
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filenames = dist.find_config_files() if find_others else []
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handlers = _apply(dist, filepath, filenames, ignore_option_errors)
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return configuration_to_dict(handlers)
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def apply_configuration(dist: "Distribution", filepath: _Path) -> "Distribution":
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"""Apply the configuration from a ``setup.cfg`` file into an existing
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distribution object.
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"""
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_apply(dist, filepath)
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dist._finalize_requires()
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return dist
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def _apply(
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dist: "Distribution", filepath: _Path,
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other_files: Iterable[_Path] = (),
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ignore_option_errors: bool = False,
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) -> Tuple["ConfigHandler", ...]:
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"""Read configuration from ``filepath`` and applies to the ``dist`` object."""
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from setuptools.dist import _Distribution
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filepath = os.path.abspath(filepath)
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if not os.path.isfile(filepath):
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raise DistutilsFileError('Configuration file %s does not exist.' % filepath)
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current_directory = os.getcwd()
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os.chdir(os.path.dirname(filepath))
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filenames = [*other_files, filepath]
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try:
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_Distribution.parse_config_files(dist, filenames=filenames)
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handlers = parse_configuration(
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dist, dist.command_options, ignore_option_errors=ignore_option_errors
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)
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dist._finalize_license_files()
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finally:
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os.chdir(current_directory)
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return handlers
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def _get_option(target_obj: Target, key: str):
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"""
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Given a target object and option key, get that option from
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the target object, either through a get_{key} method or
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from an attribute directly.
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"""
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getter_name = 'get_{key}'.format(**locals())
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by_attribute = functools.partial(getattr, target_obj, key)
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getter = getattr(target_obj, getter_name, by_attribute)
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return getter()
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def configuration_to_dict(handlers: Tuple["ConfigHandler", ...]) -> dict:
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"""Returns configuration data gathered by given handlers as a dict.
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:param list[ConfigHandler] handlers: Handlers list,
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usually from parse_configuration()
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:rtype: dict
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"""
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config_dict: dict = defaultdict(dict)
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for handler in handlers:
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for option in handler.set_options:
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value = _get_option(handler.target_obj, option)
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config_dict[handler.section_prefix][option] = value
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return config_dict
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def parse_configuration(
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distribution: "Distribution",
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command_options: AllCommandOptions,
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ignore_option_errors=False
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) -> Tuple["ConfigMetadataHandler", "ConfigOptionsHandler"]:
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"""Performs additional parsing of configuration options
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for a distribution.
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Returns a list of used option handlers.
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:param Distribution distribution:
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:param dict command_options:
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:param bool ignore_option_errors: Whether to silently ignore
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options, values of which could not be resolved (e.g. due to exceptions
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in directives such as file:, attr:, etc.).
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If False exceptions are propagated as expected.
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:rtype: list
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"""
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with expand.EnsurePackagesDiscovered(distribution) as ensure_discovered:
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options = ConfigOptionsHandler(
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distribution,
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command_options,
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ignore_option_errors,
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ensure_discovered,
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)
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options.parse()
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if not distribution.package_dir:
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distribution.package_dir = options.package_dir # Filled by `find_packages`
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meta = ConfigMetadataHandler(
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distribution.metadata,
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command_options,
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ignore_option_errors,
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ensure_discovered,
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distribution.package_dir,
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distribution.src_root,
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)
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meta.parse()
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distribution._referenced_files.update(
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options._referenced_files, meta._referenced_files
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)
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return meta, options
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def _warn_accidental_env_marker_misconfig(label: str, orig_value: str, parsed: list):
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"""Because users sometimes misinterpret this configuration:
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[options.extras_require]
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foo = bar;python_version<"4"
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It looks like one requirement with an environment marker
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but because there is no newline, it's parsed as two requirements
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with a semicolon as separator.
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Therefore, if:
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* input string does not contain a newline AND
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* parsed result contains two requirements AND
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* parsing of the two parts from the result ("<first>;<second>")
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leads in a valid Requirement with a valid marker
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a UserWarning is shown to inform the user about the possible problem.
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"""
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if "\n" in orig_value or len(parsed) != 2:
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return
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with contextlib.suppress(InvalidRequirement):
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original_requirements_str = ";".join(parsed)
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req = Requirement(original_requirements_str)
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if req.marker is not None:
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msg = (
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f"One of the parsed requirements in `{label}` "
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f"looks like a valid environment marker: '{parsed[1]}'\n"
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"Make sure that the config is correct and check "
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"https://setuptools.pypa.io/en/latest/userguide/declarative_config.html#opt-2" # noqa: E501
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)
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warnings.warn(msg, UserWarning)
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class ConfigHandler(Generic[Target]):
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"""Handles metadata supplied in configuration files."""
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section_prefix: str
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"""Prefix for config sections handled by this handler.
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Must be provided by class heirs.
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"""
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aliases: Dict[str, str] = {}
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"""Options aliases.
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For compatibility with various packages. E.g.: d2to1 and pbr.
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Note: `-` in keys is replaced with `_` by config parser.
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"""
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def __init__(
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self,
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target_obj: Target,
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options: AllCommandOptions,
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ignore_option_errors,
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ensure_discovered: expand.EnsurePackagesDiscovered,
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):
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sections: AllCommandOptions = {}
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section_prefix = self.section_prefix
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for section_name, section_options in options.items():
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if not section_name.startswith(section_prefix):
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continue
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section_name = section_name.replace(section_prefix, '').strip('.')
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sections[section_name] = section_options
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self.ignore_option_errors = ignore_option_errors
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self.target_obj = target_obj
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self.sections = sections
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self.set_options: List[str] = []
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self.ensure_discovered = ensure_discovered
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self._referenced_files: Set[str] = set()
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"""After parsing configurations, this property will enumerate
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all files referenced by the "file:" directive. Private API for setuptools only.
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"""
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@property
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def parsers(self):
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"""Metadata item name to parser function mapping."""
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raise NotImplementedError(
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'%s must provide .parsers property' % self.__class__.__name__
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)
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def __setitem__(self, option_name, value):
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unknown = tuple()
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target_obj = self.target_obj
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# Translate alias into real name.
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option_name = self.aliases.get(option_name, option_name)
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current_value = getattr(target_obj, option_name, unknown)
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if current_value is unknown:
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raise KeyError(option_name)
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if current_value:
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# Already inhabited. Skipping.
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return
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skip_option = False
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parser = self.parsers.get(option_name)
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if parser:
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try:
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value = parser(value)
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except Exception:
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skip_option = True
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if not self.ignore_option_errors:
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raise
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if skip_option:
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return
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setter = getattr(target_obj, 'set_%s' % option_name, None)
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if setter is None:
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setattr(target_obj, option_name, value)
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else:
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setter(value)
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self.set_options.append(option_name)
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@classmethod
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def _parse_list(cls, value, separator=','):
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"""Represents value as a list.
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Value is split either by separator (defaults to comma) or by lines.
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:param value:
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:param separator: List items separator character.
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:rtype: list
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"""
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if isinstance(value, list): # _get_parser_compound case
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return value
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if '\n' in value:
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value = value.splitlines()
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else:
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value = value.split(separator)
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return [chunk.strip() for chunk in value if chunk.strip()]
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@classmethod
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def _parse_dict(cls, value):
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"""Represents value as a dict.
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:param value:
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:rtype: dict
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"""
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separator = '='
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result = {}
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for line in cls._parse_list(value):
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key, sep, val = line.partition(separator)
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if sep != separator:
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raise DistutilsOptionError(
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'Unable to parse option value to dict: %s' % value
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)
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result[key.strip()] = val.strip()
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return result
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@classmethod
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def _parse_bool(cls, value):
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"""Represents value as boolean.
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:param value:
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:rtype: bool
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"""
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value = value.lower()
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return value in ('1', 'true', 'yes')
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@classmethod
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def _exclude_files_parser(cls, key):
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"""Returns a parser function to make sure field inputs
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are not files.
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Parses a value after getting the key so error messages are
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more informative.
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:param key:
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:rtype: callable
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"""
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def parser(value):
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exclude_directive = 'file:'
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if value.startswith(exclude_directive):
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raise ValueError(
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'Only strings are accepted for the {0} field, '
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'files are not accepted'.format(key)
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)
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return value
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return parser
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def _parse_file(self, value, root_dir: _Path):
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"""Represents value as a string, allowing including text
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from nearest files using `file:` directive.
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Directive is sandboxed and won't reach anything outside
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directory with setup.py.
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Examples:
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file: README.rst, CHANGELOG.md, src/file.txt
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:param str value:
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:rtype: str
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"""
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include_directive = 'file:'
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if not isinstance(value, str):
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return value
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if not value.startswith(include_directive):
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return value
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spec = value[len(include_directive) :]
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filepaths = [path.strip() for path in spec.split(',')]
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self._referenced_files.update(filepaths)
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return expand.read_files(filepaths, root_dir)
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def _parse_attr(self, value, package_dir, root_dir: _Path):
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"""Represents value as a module attribute.
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Examples:
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attr: package.attr
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attr: package.module.attr
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:param str value:
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:rtype: str
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"""
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attr_directive = 'attr:'
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if not value.startswith(attr_directive):
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return value
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attr_desc = value.replace(attr_directive, '')
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# Make sure package_dir is populated correctly, so `attr:` directives can work
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package_dir.update(self.ensure_discovered.package_dir)
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return expand.read_attr(attr_desc, package_dir, root_dir)
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@classmethod
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def _get_parser_compound(cls, *parse_methods):
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"""Returns parser function to represents value as a list.
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Parses a value applying given methods one after another.
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:param parse_methods:
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:rtype: callable
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"""
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def parse(value):
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parsed = value
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for method in parse_methods:
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parsed = method(parsed)
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return parsed
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return parse
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@classmethod
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def _parse_section_to_dict_with_key(cls, section_options, values_parser):
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"""Parses section options into a dictionary.
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Applies a given parser to each option in a section.
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:param dict section_options:
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:param callable values_parser: function with 2 args corresponding to key, value
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:rtype: dict
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"""
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value = {}
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for key, (_, val) in section_options.items():
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value[key] = values_parser(key, val)
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return value
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@classmethod
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def _parse_section_to_dict(cls, section_options, values_parser=None):
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"""Parses section options into a dictionary.
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Optionally applies a given parser to each value.
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:param dict section_options:
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:param callable values_parser: function with 1 arg corresponding to option value
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:rtype: dict
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"""
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parser = (lambda _, v: values_parser(v)) if values_parser else (lambda _, v: v)
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return cls._parse_section_to_dict_with_key(section_options, parser)
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def parse_section(self, section_options):
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"""Parses configuration file section.
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:param dict section_options:
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"""
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for (name, (_, value)) in section_options.items():
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with contextlib.suppress(KeyError):
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# Keep silent for a new option may appear anytime.
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self[name] = value
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def parse(self):
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"""Parses configuration file items from one
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or more related sections.
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"""
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for section_name, section_options in self.sections.items():
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method_postfix = ''
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if section_name: # [section.option] variant
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method_postfix = '_%s' % section_name
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section_parser_method: Optional[Callable] = getattr(
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self,
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# Dots in section names are translated into dunderscores.
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('parse_section%s' % method_postfix).replace('.', '__'),
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None,
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)
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if section_parser_method is None:
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raise DistutilsOptionError(
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'Unsupported distribution option section: [%s.%s]'
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% (self.section_prefix, section_name)
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)
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section_parser_method(section_options)
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def _deprecated_config_handler(self, func, msg, warning_class):
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"""this function will wrap around parameters that are deprecated
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:param msg: deprecation message
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:param warning_class: class of warning exception to be raised
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:param func: function to be wrapped around
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"""
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@wraps(func)
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def config_handler(*args, **kwargs):
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warnings.warn(msg, warning_class)
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return func(*args, **kwargs)
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return config_handler
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class ConfigMetadataHandler(ConfigHandler["DistributionMetadata"]):
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section_prefix = 'metadata'
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aliases = {
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'home_page': 'url',
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'summary': 'description',
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'classifier': 'classifiers',
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'platform': 'platforms',
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}
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strict_mode = False
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"""We need to keep it loose, to be partially compatible with
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`pbr` and `d2to1` packages which also uses `metadata` section.
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"""
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def __init__(
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self,
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target_obj: "DistributionMetadata",
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options: AllCommandOptions,
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ignore_option_errors: bool,
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ensure_discovered: expand.EnsurePackagesDiscovered,
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package_dir: Optional[dict] = None,
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root_dir: _Path = os.curdir
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):
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super().__init__(target_obj, options, ignore_option_errors, ensure_discovered)
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self.package_dir = package_dir
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self.root_dir = root_dir
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@property
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def parsers(self):
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"""Metadata item name to parser function mapping."""
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parse_list = self._parse_list
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parse_file = partial(self._parse_file, root_dir=self.root_dir)
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parse_dict = self._parse_dict
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exclude_files_parser = self._exclude_files_parser
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return {
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'platforms': parse_list,
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'keywords': parse_list,
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'provides': parse_list,
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'requires': self._deprecated_config_handler(
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parse_list,
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|
"The requires parameter is deprecated, please use "
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"install_requires for runtime dependencies.",
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SetuptoolsDeprecationWarning,
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),
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'obsoletes': parse_list,
|
|
'classifiers': self._get_parser_compound(parse_file, parse_list),
|
|
'license': exclude_files_parser('license'),
|
|
'license_file': self._deprecated_config_handler(
|
|
exclude_files_parser('license_file'),
|
|
"The license_file parameter is deprecated, "
|
|
"use license_files instead.",
|
|
SetuptoolsDeprecationWarning,
|
|
),
|
|
'license_files': parse_list,
|
|
'description': parse_file,
|
|
'long_description': parse_file,
|
|
'version': self._parse_version,
|
|
'project_urls': parse_dict,
|
|
}
|
|
|
|
def _parse_version(self, value):
|
|
"""Parses `version` option value.
|
|
|
|
:param value:
|
|
:rtype: str
|
|
|
|
"""
|
|
version = self._parse_file(value, self.root_dir)
|
|
|
|
if version != value:
|
|
version = version.strip()
|
|
# Be strict about versions loaded from file because it's easy to
|
|
# accidentally include newlines and other unintended content
|
|
try:
|
|
Version(version)
|
|
except InvalidVersion:
|
|
tmpl = (
|
|
'Version loaded from {value} does not '
|
|
'comply with PEP 440: {version}'
|
|
)
|
|
raise DistutilsOptionError(tmpl.format(**locals()))
|
|
|
|
return version
|
|
|
|
return expand.version(self._parse_attr(value, self.package_dir, self.root_dir))
|
|
|
|
|
|
class ConfigOptionsHandler(ConfigHandler["Distribution"]):
|
|
|
|
section_prefix = 'options'
|
|
|
|
def __init__(
|
|
self,
|
|
target_obj: "Distribution",
|
|
options: AllCommandOptions,
|
|
ignore_option_errors: bool,
|
|
ensure_discovered: expand.EnsurePackagesDiscovered,
|
|
):
|
|
super().__init__(target_obj, options, ignore_option_errors, ensure_discovered)
|
|
self.root_dir = target_obj.src_root
|
|
self.package_dir: Dict[str, str] = {} # To be filled by `find_packages`
|
|
|
|
@classmethod
|
|
def _parse_list_semicolon(cls, value):
|
|
return cls._parse_list(value, separator=';')
|
|
|
|
def _parse_file_in_root(self, value):
|
|
return self._parse_file(value, root_dir=self.root_dir)
|
|
|
|
def _parse_requirements_list(self, label: str, value: str):
|
|
# Parse a requirements list, either by reading in a `file:`, or a list.
|
|
parsed = self._parse_list_semicolon(self._parse_file_in_root(value))
|
|
_warn_accidental_env_marker_misconfig(label, value, parsed)
|
|
# Filter it to only include lines that are not comments. `parse_list`
|
|
# will have stripped each line and filtered out empties.
|
|
return [line for line in parsed if not line.startswith("#")]
|
|
|
|
@property
|
|
def parsers(self):
|
|
"""Metadata item name to parser function mapping."""
|
|
parse_list = self._parse_list
|
|
parse_bool = self._parse_bool
|
|
parse_dict = self._parse_dict
|
|
parse_cmdclass = self._parse_cmdclass
|
|
|
|
return {
|
|
'zip_safe': parse_bool,
|
|
'include_package_data': parse_bool,
|
|
'package_dir': parse_dict,
|
|
'scripts': parse_list,
|
|
'eager_resources': parse_list,
|
|
'dependency_links': parse_list,
|
|
'namespace_packages': self._deprecated_config_handler(
|
|
parse_list,
|
|
"The namespace_packages parameter is deprecated, "
|
|
"consider using implicit namespaces instead (PEP 420).",
|
|
SetuptoolsDeprecationWarning,
|
|
),
|
|
'install_requires': partial(
|
|
self._parse_requirements_list, "install_requires"
|
|
),
|
|
'setup_requires': self._parse_list_semicolon,
|
|
'tests_require': self._parse_list_semicolon,
|
|
'packages': self._parse_packages,
|
|
'entry_points': self._parse_file_in_root,
|
|
'py_modules': parse_list,
|
|
'python_requires': SpecifierSet,
|
|
'cmdclass': parse_cmdclass,
|
|
}
|
|
|
|
def _parse_cmdclass(self, value):
|
|
package_dir = self.ensure_discovered.package_dir
|
|
return expand.cmdclass(self._parse_dict(value), package_dir, self.root_dir)
|
|
|
|
def _parse_packages(self, value):
|
|
"""Parses `packages` option value.
|
|
|
|
:param value:
|
|
:rtype: list
|
|
"""
|
|
find_directives = ['find:', 'find_namespace:']
|
|
trimmed_value = value.strip()
|
|
|
|
if trimmed_value not in find_directives:
|
|
return self._parse_list(value)
|
|
|
|
# Read function arguments from a dedicated section.
|
|
find_kwargs = self.parse_section_packages__find(
|
|
self.sections.get('packages.find', {})
|
|
)
|
|
|
|
find_kwargs.update(
|
|
namespaces=(trimmed_value == find_directives[1]),
|
|
root_dir=self.root_dir,
|
|
fill_package_dir=self.package_dir,
|
|
)
|
|
|
|
return expand.find_packages(**find_kwargs)
|
|
|
|
def parse_section_packages__find(self, section_options):
|
|
"""Parses `packages.find` configuration file section.
|
|
|
|
To be used in conjunction with _parse_packages().
|
|
|
|
:param dict section_options:
|
|
"""
|
|
section_data = self._parse_section_to_dict(section_options, self._parse_list)
|
|
|
|
valid_keys = ['where', 'include', 'exclude']
|
|
|
|
find_kwargs = dict(
|
|
[(k, v) for k, v in section_data.items() if k in valid_keys and v]
|
|
)
|
|
|
|
where = find_kwargs.get('where')
|
|
if where is not None:
|
|
find_kwargs['where'] = where[0] # cast list to single val
|
|
|
|
return find_kwargs
|
|
|
|
def parse_section_entry_points(self, section_options):
|
|
"""Parses `entry_points` configuration file section.
|
|
|
|
:param dict section_options:
|
|
"""
|
|
parsed = self._parse_section_to_dict(section_options, self._parse_list)
|
|
self['entry_points'] = parsed
|
|
|
|
def _parse_package_data(self, section_options):
|
|
package_data = self._parse_section_to_dict(section_options, self._parse_list)
|
|
return expand.canonic_package_data(package_data)
|
|
|
|
def parse_section_package_data(self, section_options):
|
|
"""Parses `package_data` configuration file section.
|
|
|
|
:param dict section_options:
|
|
"""
|
|
self['package_data'] = self._parse_package_data(section_options)
|
|
|
|
def parse_section_exclude_package_data(self, section_options):
|
|
"""Parses `exclude_package_data` configuration file section.
|
|
|
|
:param dict section_options:
|
|
"""
|
|
self['exclude_package_data'] = self._parse_package_data(section_options)
|
|
|
|
def parse_section_extras_require(self, section_options):
|
|
"""Parses `extras_require` configuration file section.
|
|
|
|
:param dict section_options:
|
|
"""
|
|
parsed = self._parse_section_to_dict_with_key(
|
|
section_options,
|
|
lambda k, v: self._parse_requirements_list(f"extras_require[{k}]", v)
|
|
)
|
|
|
|
self['extras_require'] = parsed
|
|
|
|
def parse_section_data_files(self, section_options):
|
|
"""Parses `data_files` configuration file section.
|
|
|
|
:param dict section_options:
|
|
"""
|
|
parsed = self._parse_section_to_dict(section_options, self._parse_list)
|
|
self['data_files'] = expand.canonic_data_files(parsed, self.root_dir)
|