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