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