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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")) | |