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112 lines
3.8 KiB
Python
112 lines
3.8 KiB
Python
2 years ago
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import sys
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from typing import List, Optional, Tuple
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from pip._vendor.packaging.tags import Tag
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from pip._internal.utils.compatibility_tags import get_supported, version_info_to_nodot
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from pip._internal.utils.misc import normalize_version_info
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class TargetPython:
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"""
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Encapsulates the properties of a Python interpreter one is targeting
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for a package install, download, etc.
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"""
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__slots__ = [
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"_given_py_version_info",
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"abis",
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"implementation",
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"platforms",
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"py_version",
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"py_version_info",
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"_valid_tags",
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]
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def __init__(
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self,
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platforms: Optional[List[str]] = None,
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py_version_info: Optional[Tuple[int, ...]] = None,
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abis: Optional[List[str]] = None,
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implementation: Optional[str] = None,
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) -> None:
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"""
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:param platforms: A list of strings or None. If None, searches for
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packages that are supported by the current system. Otherwise, will
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find packages that can be built on the platforms passed in. These
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packages will only be downloaded for distribution: they will
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not be built locally.
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:param py_version_info: An optional tuple of ints representing the
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Python version information to use (e.g. `sys.version_info[:3]`).
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This can have length 1, 2, or 3 when provided.
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:param abis: A list of strings or None. This is passed to
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compatibility_tags.py's get_supported() function as is.
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:param implementation: A string or None. This is passed to
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compatibility_tags.py's get_supported() function as is.
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"""
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# Store the given py_version_info for when we call get_supported().
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self._given_py_version_info = py_version_info
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if py_version_info is None:
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py_version_info = sys.version_info[:3]
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else:
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py_version_info = normalize_version_info(py_version_info)
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py_version = '.'.join(map(str, py_version_info[:2]))
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self.abis = abis
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self.implementation = implementation
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self.platforms = platforms
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self.py_version = py_version
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self.py_version_info = py_version_info
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# This is used to cache the return value of get_tags().
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self._valid_tags: Optional[List[Tag]] = None
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def format_given(self) -> str:
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"""
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Format the given, non-None attributes for display.
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"""
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display_version = None
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if self._given_py_version_info is not None:
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display_version = '.'.join(
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str(part) for part in self._given_py_version_info
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)
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key_values = [
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('platforms', self.platforms),
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('version_info', display_version),
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('abis', self.abis),
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('implementation', self.implementation),
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]
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return ' '.join(
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f'{key}={value!r}' for key, value in key_values
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if value is not None
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)
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def get_tags(self) -> List[Tag]:
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"""
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Return the supported PEP 425 tags to check wheel candidates against.
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The tags are returned in order of preference (most preferred first).
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"""
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if self._valid_tags is None:
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# Pass versions=None if no py_version_info was given since
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# versions=None uses special default logic.
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py_version_info = self._given_py_version_info
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if py_version_info is None:
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version = None
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else:
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version = version_info_to_nodot(py_version_info)
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tags = get_supported(
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version=version,
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platforms=self.platforms,
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abis=self.abis,
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impl=self.implementation,
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)
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self._valid_tags = tags
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return self._valid_tags
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