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| import functools | |
| import os | |
| import site | |
| import sys | |
| import sysconfig | |
| import typing | |
| 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: typing.Optional[str] = site.getusersitepackages() | |
| except AttributeError: | |
| user_site = site.USER_SITE | |
| def is_osx_framework() -> bool: | |
| return bool(sysconfig.get_config_var("PYTHONFRAMEWORK")) | |