50 lines
2.0 KiB
Python
50 lines
2.0 KiB
Python
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import Optional
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from pip._internal.models.format_control import FormatControl
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class SelectionPreferences(object):
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"""
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Encapsulates the candidate selection preferences for downloading
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and installing files.
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"""
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__slots__ = ['allow_yanked', 'allow_all_prereleases', 'format_control',
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'prefer_binary', 'ignore_requires_python']
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# Don't include an allow_yanked default value to make sure each call
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# site considers whether yanked releases are allowed. This also causes
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# that decision to be made explicit in the calling code, which helps
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# people when reading the code.
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def __init__(
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self,
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allow_yanked, # type: bool
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allow_all_prereleases=False, # type: bool
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format_control=None, # type: Optional[FormatControl]
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prefer_binary=False, # type: bool
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ignore_requires_python=None, # type: Optional[bool]
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):
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# type: (...) -> None
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"""Create a SelectionPreferences object.
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:param allow_yanked: Whether files marked as yanked (in the sense
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of PEP 592) are permitted to be candidates for install.
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:param format_control: A FormatControl object or None. Used to control
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the selection of source packages / binary packages when consulting
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the index and links.
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:param prefer_binary: Whether to prefer an old, but valid, binary
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dist over a new source dist.
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:param ignore_requires_python: Whether to ignore incompatible
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"Requires-Python" values in links. Defaults to False.
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"""
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if ignore_requires_python is None:
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ignore_requires_python = False
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self.allow_yanked = allow_yanked
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self.allow_all_prereleases = allow_all_prereleases
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self.format_control = format_control
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self.prefer_binary = prefer_binary
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self.ignore_requires_python = ignore_requires_python
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