111 lines
3.1 KiB
Python
111 lines
3.1 KiB
Python
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from __future__ import annotations
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from abc import ABC
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from collections import OrderedDict
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from pathlib import Path
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from virtualenv.info import IS_WIN
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class Describe:
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"""Given a host interpreter tell us information about what the created interpreter might look like."""
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suffix = ".exe" if IS_WIN else ""
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def __init__(self, dest, interpreter) -> None:
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self.interpreter = interpreter
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self.dest = dest
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self._stdlib = None
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self._stdlib_platform = None
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self._system_stdlib = None
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self._conf_vars = None
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@property
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def bin_dir(self):
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return self.script_dir
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@property
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def script_dir(self):
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return self.dest / self.interpreter.install_path("scripts")
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@property
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def purelib(self):
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return self.dest / self.interpreter.install_path("purelib")
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@property
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def platlib(self):
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return self.dest / self.interpreter.install_path("platlib")
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@property
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def libs(self):
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return list(OrderedDict(((self.platlib, None), (self.purelib, None))).keys())
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@property
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def stdlib(self):
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if self._stdlib is None:
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self._stdlib = Path(self.interpreter.sysconfig_path("stdlib", config_var=self._config_vars))
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return self._stdlib
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@property
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def stdlib_platform(self):
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if self._stdlib_platform is None:
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self._stdlib_platform = Path(self.interpreter.sysconfig_path("platstdlib", config_var=self._config_vars))
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return self._stdlib_platform
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@property
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def _config_vars(self):
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if self._conf_vars is None:
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self._conf_vars = self._calc_config_vars(self.dest)
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return self._conf_vars
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def _calc_config_vars(self, to):
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sys_vars = self.interpreter.sysconfig_vars
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return {k: (to if v is not None and v.startswith(self.interpreter.prefix) else v) for k, v in sys_vars.items()}
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@classmethod
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def can_describe(cls, interpreter): # noqa: ARG003
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"""Knows means it knows how the output will look."""
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return True
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@property
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def env_name(self):
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return self.dest.parts[-1]
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@property
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def exe(self):
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return self.bin_dir / f"{self.exe_stem()}{self.suffix}"
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@classmethod
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def exe_stem(cls):
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"""Executable name without suffix - there seems to be no standard way to get this without creating it."""
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raise NotImplementedError
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def script(self, name):
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return self.script_dir / f"{name}{self.suffix}"
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class Python3Supports(Describe, ABC):
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@classmethod
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def can_describe(cls, interpreter):
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return interpreter.version_info.major == 3 and super().can_describe(interpreter) # noqa: PLR2004
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class PosixSupports(Describe, ABC):
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@classmethod
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def can_describe(cls, interpreter):
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return interpreter.os == "posix" and super().can_describe(interpreter)
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class WindowsSupports(Describe, ABC):
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@classmethod
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def can_describe(cls, interpreter):
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return interpreter.os == "nt" and super().can_describe(interpreter)
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__all__ = [
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"Describe",
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"PosixSupports",
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"Python3Supports",
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"WindowsSupports",
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]
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