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111 lines
3.8 KiB
Python
111 lines
3.8 KiB
Python
5 years ago
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import sys
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from pip._internal.utils.compatibility_tags import (
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get_supported,
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version_info_to_nodot,
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)
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from pip._internal.utils.misc import normalize_version_info
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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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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class TargetPython(object):
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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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def __init__(
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self,
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platform=None, # type: Optional[str]
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py_version_info=None, # type: Optional[Tuple[int, ...]]
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abi=None, # type: Optional[str]
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implementation=None, # type: Optional[str]
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):
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# type: (...) -> None
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"""
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:param platform: A string or None. If None, searches for packages
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that are supported by the current system. Otherwise, will find
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packages that can be built on the platform 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 abi: A string or None. This is passed to compatibility_tags.py's
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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.abi = abi
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self.implementation = implementation
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self.platform = platform
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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 = None # type: Optional[List[Tag]]
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def format_given(self):
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# type: () -> 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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('platform', self.platform),
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('version_info', display_version),
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('abi', self.abi),
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('implementation', self.implementation),
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]
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return ' '.join(
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'{}={!r}'.format(key, value) 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):
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# type: () -> 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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platform=self.platform,
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abi=self.abi,
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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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