codekingpro/portable-devtools

1from __future__ import annotations2 3from abc import ABC4from collections import OrderedDict5from pathlib import Path6 7from virtualenv.info import IS_WIN8 9 10class Describe(ABC):11    """Given a host interpreter tell us information about what the created interpreter might look like."""12 13    suffix = ".exe" if IS_WIN else ""14 15    def __init__(self, dest, interpreter) -> None:16        self.interpreter = interpreter17        self.dest = dest18        self._stdlib = None19        self._stdlib_platform = None20        self._system_stdlib = None21        self._conf_vars = None22 23    @property24    def bin_dir(self):25        return self.script_dir26 27    @property28    def script_dir(self):29        return self.dest / self.interpreter.install_path("scripts")30 31    @property32    def purelib(self):33        return self.dest / self.interpreter.install_path("purelib")34 35    @property36    def platlib(self):37        return self.dest / self.interpreter.install_path("platlib")38 39    @property40    def libs(self):41        return list(OrderedDict(((self.platlib, None), (self.purelib, None))).keys())42 43    @property44    def stdlib(self):45        if self._stdlib is None:46            self._stdlib = Path(self.interpreter.sysconfig_path("stdlib", config_var=self._config_vars))47        return self._stdlib48 49    @property50    def stdlib_platform(self):51        if self._stdlib_platform is None:52            self._stdlib_platform = Path(self.interpreter.sysconfig_path("platstdlib", config_var=self._config_vars))53        return self._stdlib_platform54 55    @property56    def _config_vars(self):57        if self._conf_vars is None:58            self._conf_vars = self._calc_config_vars(self.dest)59        return self._conf_vars60 61    def _calc_config_vars(self, to):62        sys_vars = self.interpreter.sysconfig_vars63        return {k: (to if v is not None and v.startswith(self.interpreter.prefix) else v) for k, v in sys_vars.items()}64 65    @classmethod66    def can_describe(cls, interpreter):  # noqa: ARG00367        """Knows means it knows how the output will look."""68        return True69 70    @property71    def env_name(self):72        return self.dest.parts[-1]73 74    @property75    def exe(self):76        return self.bin_dir / f"{self.exe_stem()}{self.suffix}"77 78    @classmethod79    def exe_stem(cls):80        """Executable name without suffix - there seems to be no standard way to get this without creating it."""81        raise NotImplementedError82 83    def script(self, name):84        return self.script_dir / f"{name}{self.suffix}"85 86 87class Python3Supports(Describe, ABC):88    @classmethod89    def can_describe(cls, interpreter):90        return interpreter.version_info.major == 3 and super().can_describe(interpreter)  # noqa: PLR200491 92 93class PosixSupports(Describe, ABC):94    @classmethod95    def can_describe(cls, interpreter):96        return interpreter.os == "posix" and super().can_describe(interpreter)97 98 99class WindowsSupports(Describe, ABC):100    @classmethod101    def can_describe(cls, interpreter):102        return interpreter.os == "nt" and super().can_describe(interpreter)103 104 105__all__ = [106    "Describe",107    "PosixSupports",108    "Python3Supports",109    "WindowsSupports",110]111