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"""Locations where we look for configs, install stuff, etc"""
# The following comment should be removed at some point in the future.
# mypy: strict-optional=False
from __future__ import absolute_import
import os
import os.path
import platform
import site
import sys
import sysconfig
from distutils import sysconfig as distutils_sysconfig
from distutils.command.install import SCHEME_KEYS # type: ignore
from distutils.command.install import install as distutils_install_command
from pip._internal.models.scheme import Scheme
from pip._internal.utils import appdirs
from pip._internal.utils.compat import WINDOWS
from pip._internal.utils.typing import MYPY_CHECK_RUNNING, cast
from pip._internal.utils.virtualenv import running_under_virtualenv
if MYPY_CHECK_RUNNING:
from typing import Dict, List, Optional, Union
from distutils.cmd import Command as DistutilsCommand
# Application Directories
USER_CACHE_DIR = appdirs.user_cache_dir("pip")
def get_major_minor_version():
# type: () -> 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 get_src_prefix():
# type: () -> 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)
# FIXME doesn't account for venv linked to global site-packages
site_packages = sysconfig.get_path("purelib") # type: Optional[str]
# This is because of a bug in PyPy's sysconfig module, see
# https://bitbucket.org/pypy/pypy/issues/2506/sysconfig-returns-incorrect-paths
# for more information.
if platform.python_implementation().lower() == "pypy":
site_packages = distutils_sysconfig.get_python_lib()
try:
# Use getusersitepackages if this is present, as it ensures that the
# value is initialised properly.
user_site = site.getusersitepackages()
except AttributeError:
user_site = site.USER_SITE
if WINDOWS:
bin_py = os.path.join(sys.prefix, 'Scripts')
bin_user = os.path.join(user_site, 'Scripts')
# buildout uses 'bin' on Windows too?
if not os.path.exists(bin_py):
bin_py = os.path.join(sys.prefix, 'bin')
bin_user = os.path.join(user_site, 'bin')
else:
bin_py = os.path.join(sys.prefix, 'bin')
bin_user = os.path.join(user_site, 'bin')
# Forcing to use /usr/local/bin for standard macOS framework installs
# Also log to ~/Library/Logs/ for use with the Console.app log viewer
if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
bin_py = '/usr/local/bin'
def distutils_scheme(
dist_name, user=False, home=None, root=None, isolated=False, prefix=None
):
# type:(str, bool, str, str, bool, str) -> Dict[str, str]
"""
Return a distutils install scheme
"""
from distutils.dist import Distribution
dist_args = {'name': dist_name} # type: Dict[str, Union[str, List[str]]]
if isolated:
dist_args["script_args"] = ["--no-user-cfg"]
d = Distribution(dist_args)
d.parse_config_files()
obj = None # type: Optional[DistutilsCommand]
obj = d.get_command_obj('install', create=True)
assert obj is not None
i = cast(distutils_install_command, obj)
# NOTE: setting user or home has the side-effect of creating the home dir
# or user base for installations during finalize_options()
# ideally, we'd prefer a scheme class that has no side-effects.
assert not (user and prefix), "user={} prefix={}".format(user, prefix)
assert not (home and prefix), "home={} prefix={}".format(home, prefix)
i.user = user or i.user
if user or home:
i.prefix = ""
i.prefix = prefix or i.prefix
i.home = home or i.home
i.root = root or i.root
i.finalize_options()
scheme = {}
for key in SCHEME_KEYS:
scheme[key] = getattr(i, 'install_' + key)
# install_lib specified in setup.cfg should install *everything*
# into there (i.e. it takes precedence over both purelib and
# platlib). Note, i.install_lib is *always* set after
# finalize_options(); we only want to override here if the user
# has explicitly requested it hence going back to the config
if 'install_lib' in d.get_option_dict('install'):
scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
if running_under_virtualenv():
scheme['headers'] = os.path.join(
sys.prefix,
'include',
'site',
'python{}'.format(get_major_minor_version()),
dist_name,
)
if root is not None:
path_no_drive = os.path.splitdrive(
os.path.abspath(scheme["headers"]))[1]
scheme["headers"] = os.path.join(
root,
path_no_drive[1:],
)
return scheme
def get_scheme(
dist_name, # type: str
user=False, # type: bool
home=None, # type: Optional[str]
root=None, # type: Optional[str]
isolated=False, # type: bool
prefix=None, # type: Optional[str]
):
# type: (...) -> Scheme
"""
Get the "scheme" corresponding to the input parameters. The distutils
documentation provides the context for the available schemes:
https://docs.python.org/3/install/index.html#alternate-installation
:param dist_name: the name of the package to retrieve the scheme for, used
in the headers scheme path
:param user: indicates to use the "user" scheme
:param home: indicates to use the "home" scheme and provides the base
directory for the same
:param root: root under which other directories are re-based
:param isolated: equivalent to --no-user-cfg, i.e. do not consider
~/.pydistutils.cfg (posix) or ~/pydistutils.cfg (non-posix) for
scheme paths
:param prefix: indicates to use the "prefix" scheme and provides the
base directory for the same
"""
scheme = distutils_scheme(
dist_name, user, home, root, isolated, prefix
)
return Scheme(
platlib=scheme["platlib"],
purelib=scheme["purelib"],
headers=scheme["headers"],
scripts=scheme["scripts"],
data=scheme["data"],
)
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