752 lines
23 KiB
Python
752 lines
23 KiB
Python
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import ast
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import io
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import os
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import sys
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import warnings
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import functools
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import importlib
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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 glob import iglob
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import contextlib
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from distutils.errors import DistutilsOptionError, DistutilsFileError
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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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class StaticModule:
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"""
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Attempt to load the module by the name
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"""
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def __init__(self, name):
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spec = importlib.util.find_spec(name)
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with open(spec.origin) as strm:
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src = strm.read()
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module = ast.parse(src)
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vars(self).update(locals())
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del self.self
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def __getattr__(self, attr):
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try:
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return next(
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ast.literal_eval(statement.value)
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for statement in self.module.body
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if isinstance(statement, ast.Assign)
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for target in statement.targets
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if isinstance(target, ast.Name) and target.id == attr
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)
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except Exception as e:
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raise AttributeError(
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"{self.name} has no attribute {attr}".format(**locals())
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) from e
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@contextlib.contextmanager
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def patch_path(path):
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"""
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Add path to front of sys.path for the duration of the context.
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"""
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try:
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sys.path.insert(0, path)
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yield
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finally:
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sys.path.remove(path)
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def read_configuration(filepath, find_others=False, ignore_option_errors=False):
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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, _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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try:
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dist = Distribution()
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filenames = dist.find_config_files() if find_others else []
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if filepath not in filenames:
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filenames.append(filepath)
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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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finally:
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os.chdir(current_directory)
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return configuration_to_dict(handlers)
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def _get_option(target_obj, key):
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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):
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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 = 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(distribution, command_options, ignore_option_errors=False):
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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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options = ConfigOptionsHandler(distribution, command_options, ignore_option_errors)
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options.parse()
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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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distribution.package_dir,
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)
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meta.parse()
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return meta, options
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class ConfigHandler:
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"""Handles metadata supplied in configuration files."""
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section_prefix = None
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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 = {}
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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__(self, target_obj, options, ignore_option_errors=False):
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sections = {}
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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 = []
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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_list_glob(cls, value, separator=','):
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"""Equivalent to _parse_list() but expands any glob patterns using glob().
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However, unlike with glob() calls, the results remain relative paths.
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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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glob_characters = ('*', '?', '[', ']', '{', '}')
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values = cls._parse_list(value, separator=separator)
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expanded_values = []
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for value in values:
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# Has globby characters?
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if any(char in value for char in glob_characters):
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# then expand the glob pattern while keeping paths *relative*:
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expanded_values.extend(sorted(
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os.path.relpath(path, os.getcwd())
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for path in iglob(os.path.abspath(value))))
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else:
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# take the value as-is:
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expanded_values.append(value)
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return expanded_values
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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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@classmethod
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def _parse_file(cls, value):
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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 = (os.path.abspath(path.strip()) for path in spec.split(','))
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return '\n'.join(
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cls._read_file(path)
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for path in filepaths
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if (cls._assert_local(path) or True) and os.path.isfile(path)
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)
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@staticmethod
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def _assert_local(filepath):
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if not filepath.startswith(os.getcwd()):
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raise DistutilsOptionError('`file:` directive can not access %s' % filepath)
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@staticmethod
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def _read_file(filepath):
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with io.open(filepath, encoding='utf-8') as f:
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return f.read()
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@classmethod
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def _parse_attr(cls, value, package_dir=None):
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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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attrs_path = value.replace(attr_directive, '').strip().split('.')
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attr_name = attrs_path.pop()
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module_name = '.'.join(attrs_path)
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module_name = module_name or '__init__'
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parent_path = os.getcwd()
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if package_dir:
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if attrs_path[0] in package_dir:
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# A custom path was specified for the module we want to import
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custom_path = package_dir[attrs_path[0]]
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parts = custom_path.rsplit('/', 1)
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if len(parts) > 1:
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parent_path = os.path.join(os.getcwd(), parts[0])
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module_name = parts[1]
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else:
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module_name = custom_path
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elif '' in package_dir:
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||
|
|
# A custom parent directory was specified for all root modules
|
||
|
|
parent_path = os.path.join(os.getcwd(), package_dir[''])
|
||
|
|
|
||
|
|
with patch_path(parent_path):
|
||
|
|
try:
|
||
|
|
# attempt to load value statically
|
||
|
|
return getattr(StaticModule(module_name), attr_name)
|
||
|
|
except Exception:
|
||
|
|
# fallback to simple import
|
||
|
|
module = importlib.import_module(module_name)
|
||
|
|
|
||
|
|
return getattr(module, attr_name)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _get_parser_compound(cls, *parse_methods):
|
||
|
|
"""Returns parser function to represents value as a list.
|
||
|
|
|
||
|
|
Parses a value applying given methods one after another.
|
||
|
|
|
||
|
|
:param parse_methods:
|
||
|
|
:rtype: callable
|
||
|
|
"""
|
||
|
|
|
||
|
|
def parse(value):
|
||
|
|
parsed = value
|
||
|
|
|
||
|
|
for method in parse_methods:
|
||
|
|
parsed = method(parsed)
|
||
|
|
|
||
|
|
return parsed
|
||
|
|
|
||
|
|
return parse
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _parse_section_to_dict(cls, section_options, values_parser=None):
|
||
|
|
"""Parses section options into a dictionary.
|
||
|
|
|
||
|
|
Optionally applies a given parser to values.
|
||
|
|
|
||
|
|
:param dict section_options:
|
||
|
|
:param callable values_parser:
|
||
|
|
:rtype: dict
|
||
|
|
"""
|
||
|
|
value = {}
|
||
|
|
values_parser = values_parser or (lambda val: val)
|
||
|
|
for key, (_, val) in section_options.items():
|
||
|
|
value[key] = values_parser(val)
|
||
|
|
return value
|
||
|
|
|
||
|
|
def parse_section(self, section_options):
|
||
|
|
"""Parses configuration file section.
|
||
|
|
|
||
|
|
:param dict section_options:
|
||
|
|
"""
|
||
|
|
for (name, (_, value)) in section_options.items():
|
||
|
|
try:
|
||
|
|
self[name] = value
|
||
|
|
|
||
|
|
except KeyError:
|
||
|
|
pass # Keep silent for a new option may appear anytime.
|
||
|
|
|
||
|
|
def parse(self):
|
||
|
|
"""Parses configuration file items from one
|
||
|
|
or more related sections.
|
||
|
|
|
||
|
|
"""
|
||
|
|
for section_name, section_options in self.sections.items():
|
||
|
|
|
||
|
|
method_postfix = ''
|
||
|
|
if section_name: # [section.option] variant
|
||
|
|
method_postfix = '_%s' % section_name
|
||
|
|
|
||
|
|
section_parser_method = getattr(
|
||
|
|
self,
|
||
|
|
# Dots in section names are translated into dunderscores.
|
||
|
|
('parse_section%s' % method_postfix).replace('.', '__'),
|
||
|
|
None,
|
||
|
|
)
|
||
|
|
|
||
|
|
if section_parser_method is None:
|
||
|
|
raise DistutilsOptionError(
|
||
|
|
'Unsupported distribution option section: [%s.%s]'
|
||
|
|
% (self.section_prefix, section_name)
|
||
|
|
)
|
||
|
|
|
||
|
|
section_parser_method(section_options)
|
||
|
|
|
||
|
|
def _deprecated_config_handler(self, func, msg, warning_class):
|
||
|
|
"""this function will wrap around parameters that are deprecated
|
||
|
|
|
||
|
|
:param msg: deprecation message
|
||
|
|
:param warning_class: class of warning exception to be raised
|
||
|
|
:param func: function to be wrapped around
|
||
|
|
"""
|
||
|
|
|
||
|
|
@wraps(func)
|
||
|
|
def config_handler(*args, **kwargs):
|
||
|
|
warnings.warn(msg, warning_class)
|
||
|
|
return func(*args, **kwargs)
|
||
|
|
|
||
|
|
return config_handler
|
||
|
|
|
||
|
|
|
||
|
|
class ConfigMetadataHandler(ConfigHandler):
|
||
|
|
|
||
|
|
section_prefix = 'metadata'
|
||
|
|
|
||
|
|
aliases = {
|
||
|
|
'home_page': 'url',
|
||
|
|
'summary': 'description',
|
||
|
|
'classifier': 'classifiers',
|
||
|
|
'platform': 'platforms',
|
||
|
|
}
|
||
|
|
|
||
|
|
strict_mode = False
|
||
|
|
"""We need to keep it loose, to be partially compatible with
|
||
|
|
`pbr` and `d2to1` packages which also uses `metadata` section.
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self, target_obj, options, ignore_option_errors=False, package_dir=None
|
||
|
|
):
|
||
|
|
super(ConfigMetadataHandler, self).__init__(
|
||
|
|
target_obj, options, ignore_option_errors
|
||
|
|
)
|
||
|
|
self.package_dir = package_dir
|
||
|
|
|
||
|
|
@property
|
||
|
|
def parsers(self):
|
||
|
|
"""Metadata item name to parser function mapping."""
|
||
|
|
parse_list = self._parse_list
|
||
|
|
parse_file = self._parse_file
|
||
|
|
parse_dict = self._parse_dict
|
||
|
|
exclude_files_parser = self._exclude_files_parser
|
||
|
|
|
||
|
|
return {
|
||
|
|
'platforms': parse_list,
|
||
|
|
'keywords': parse_list,
|
||
|
|
'provides': parse_list,
|
||
|
|
'requires': self._deprecated_config_handler(
|
||
|
|
parse_list,
|
||
|
|
"The requires parameter is deprecated, please use "
|
||
|
|
"install_requires for runtime dependencies.",
|
||
|
|
DeprecationWarning,
|
||
|
|
),
|
||
|
|
'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.",
|
||
|
|
DeprecationWarning,
|
||
|
|
),
|
||
|
|
'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)
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
version = self._parse_attr(value, self.package_dir)
|
||
|
|
|
||
|
|
if callable(version):
|
||
|
|
version = version()
|
||
|
|
|
||
|
|
if not isinstance(version, str):
|
||
|
|
if hasattr(version, '__iter__'):
|
||
|
|
version = '.'.join(map(str, version))
|
||
|
|
else:
|
||
|
|
version = '%s' % version
|
||
|
|
|
||
|
|
return version
|
||
|
|
|
||
|
|
|
||
|
|
class ConfigOptionsHandler(ConfigHandler):
|
||
|
|
|
||
|
|
section_prefix = 'options'
|
||
|
|
|
||
|
|
@property
|
||
|
|
def parsers(self):
|
||
|
|
"""Metadata item name to parser function mapping."""
|
||
|
|
parse_list = self._parse_list
|
||
|
|
parse_list_semicolon = partial(self._parse_list, separator=';')
|
||
|
|
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': parse_list,
|
||
|
|
'install_requires': parse_list_semicolon,
|
||
|
|
'setup_requires': parse_list_semicolon,
|
||
|
|
'tests_require': parse_list_semicolon,
|
||
|
|
'packages': self._parse_packages,
|
||
|
|
'entry_points': self._parse_file,
|
||
|
|
'py_modules': parse_list,
|
||
|
|
'python_requires': SpecifierSet,
|
||
|
|
'cmdclass': parse_cmdclass,
|
||
|
|
}
|
||
|
|
|
||
|
|
def _parse_cmdclass(self, value):
|
||
|
|
def resolve_class(qualified_class_name):
|
||
|
|
idx = qualified_class_name.rfind('.')
|
||
|
|
class_name = qualified_class_name[idx + 1 :]
|
||
|
|
pkg_name = qualified_class_name[:idx]
|
||
|
|
|
||
|
|
module = __import__(pkg_name)
|
||
|
|
|
||
|
|
return getattr(module, class_name)
|
||
|
|
|
||
|
|
return {k: resolve_class(v) for k, v in self._parse_dict(value).items()}
|
||
|
|
|
||
|
|
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)
|
||
|
|
|
||
|
|
findns = trimmed_value == find_directives[1]
|
||
|
|
|
||
|
|
# Read function arguments from a dedicated section.
|
||
|
|
find_kwargs = self.parse_section_packages__find(
|
||
|
|
self.sections.get('packages.find', {})
|
||
|
|
)
|
||
|
|
|
||
|
|
if findns:
|
||
|
|
from setuptools import find_namespace_packages as find_packages
|
||
|
|
else:
|
||
|
|
from setuptools import find_packages
|
||
|
|
|
||
|
|
return 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):
|
||
|
|
parsed = self._parse_section_to_dict(section_options, self._parse_list)
|
||
|
|
|
||
|
|
root = parsed.get('*')
|
||
|
|
if root:
|
||
|
|
parsed[''] = root
|
||
|
|
del parsed['*']
|
||
|
|
|
||
|
|
return parsed
|
||
|
|
|
||
|
|
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:
|
||
|
|
"""
|
||
|
|
parse_list = partial(self._parse_list, separator=';')
|
||
|
|
self['extras_require'] = self._parse_section_to_dict(
|
||
|
|
section_options, parse_list
|
||
|
|
)
|
||
|
|
|
||
|
|
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_glob)
|
||
|
|
self['data_files'] = [(k, v) for k, v in parsed.items()]
|