forked from varia/varia.website
82 lines
2.5 KiB
Python
82 lines
2.5 KiB
Python
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import functools
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import os
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import site
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import sys
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import sysconfig
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import typing
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from pip._internal.exceptions import InstallationError
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from pip._internal.utils import appdirs
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from pip._internal.utils.virtualenv import running_under_virtualenv
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# Application Directories
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USER_CACHE_DIR = appdirs.user_cache_dir("pip")
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# FIXME doesn't account for venv linked to global site-packages
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site_packages: str = sysconfig.get_path("purelib")
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def get_major_minor_version() -> str:
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"""
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Return the major-minor version of the current Python as a string, e.g.
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"3.7" or "3.10".
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"""
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return "{}.{}".format(*sys.version_info)
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def change_root(new_root: str, pathname: str) -> str:
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"""Return 'pathname' with 'new_root' prepended.
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If 'pathname' is relative, this is equivalent to os.path.join(new_root, pathname).
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Otherwise, it requires making 'pathname' relative and then joining the
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two, which is tricky on DOS/Windows and Mac OS.
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This is borrowed from Python's standard library's distutils module.
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"""
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if os.name == "posix":
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if not os.path.isabs(pathname):
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return os.path.join(new_root, pathname)
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else:
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return os.path.join(new_root, pathname[1:])
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elif os.name == "nt":
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(drive, path) = os.path.splitdrive(pathname)
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if path[0] == "\\":
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path = path[1:]
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return os.path.join(new_root, path)
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else:
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raise InstallationError(
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f"Unknown platform: {os.name}\n"
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"Can not change root path prefix on unknown platform."
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)
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def get_src_prefix() -> str:
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if running_under_virtualenv():
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src_prefix = os.path.join(sys.prefix, "src")
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else:
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# FIXME: keep src in cwd for now (it is not a temporary folder)
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try:
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src_prefix = os.path.join(os.getcwd(), "src")
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except OSError:
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# In case the current working directory has been renamed or deleted
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sys.exit("The folder you are executing pip from can no longer be found.")
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# under macOS + virtualenv sys.prefix is not properly resolved
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# it is something like /path/to/python/bin/..
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return os.path.abspath(src_prefix)
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try:
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# Use getusersitepackages if this is present, as it ensures that the
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# value is initialised properly.
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user_site: typing.Optional[str] = site.getusersitepackages()
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except AttributeError:
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user_site = site.USER_SITE
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@functools.lru_cache(maxsize=None)
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def is_osx_framework() -> bool:
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return bool(sysconfig.get_config_var("PYTHONFRAMEWORK"))
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