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📁 ..	-	2026-03-21 15:45
📄 __init__.py from __future__ import annotations import functools import logging import os import pathlib import sys import sysconfig from typing import Any from pip._internal.models.scheme import SCHEME_KEYS, Scheme from pip._internal.utils.compat import WINDOWS from pip._internal.utils.deprecation import deprecated from pip._internal.utils.virtualenv import running_under_virtualenv from . import _sysconfig from .base import ( USER_CACHE_DIR, get_major_minor_version, get_src_prefix, is_osx_framework, site_packages, user_site, ) __all__ = [ "USER_CACHE_DIR", "get_bin_prefix", "get_bin_user", "get_major_minor_version", "get_platlib", "get_purelib", "get_scheme", "get_src_prefix", "site_packages", "user_site", ] logger = logging.getLogger(__name__) _PLATLIBDIR: str = getattr(sys, "platlibdir", "lib") _USE_SYSCONFIG_DEFAULT = sys.version_info >= (3, 10) def _should_use_sysconfig() -> bool: """This function determines the value of _USE_SYSCONFIG. By default, pip uses sysconfig on Python 3.10+. But Python distributors can override this decision by setting: sysconfig._PIP_USE_SYSCONFIG = True / False Rationale in https://github.com/pypa/pip/issues/10647 This is a function for testability, but should be constant during any one run. """ return bool(getattr(sysconfig, "_PIP_USE_SYSCONFIG", _USE_SYSCONFIG_DEFAULT)) _USE_SYSCONFIG = _should_use_sysconfig() if not _USE_SYSCONFIG: # Import distutils lazily to avoid deprecation warnings, # but import it soon enough that it is in memory and available during # a pip reinstall. from . import _distutils # Be noisy about incompatibilities if this platforms "should" be using # sysconfig, but is explicitly opting out and using distutils instead. if _USE_SYSCONFIG_DEFAULT and not _USE_SYSCONFIG: _MISMATCH_LEVEL = logging.WARNING else: _MISMATCH_LEVEL = logging.DEBUG def _looks_like_bpo_44860() -> bool: """The resolution to bpo-44860 will change this incorrect platlib. See <https://bugs.python.org/issue44860>. """ from distutils.command.install import INSTALL_SCHEMES try: unix_user_platlib = INSTALL_SCHEMES["unix_user"]["platlib"] except KeyError: return False return unix_user_platlib == "$usersite" def _looks_like_red_hat_patched_platlib_purelib(scheme: dict[str, str]) -> bool: platlib = scheme["platlib"] if "/$platlibdir/" in platlib: platlib = platlib.replace("/$platlibdir/", f"/{_PLATLIBDIR}/") if "/lib64/" not in platlib: return False unpatched = platlib.replace("/lib64/", "/lib/") return unpatched.replace("$platbase/", "$base/") == scheme["purelib"] @functools.cache def _looks_like_red_hat_lib() -> bool: """Red Hat patches platlib in unix_prefix and unix_home, but not purelib. This is the only way I can see to tell a Red Hat-patched Python. """ from distutils.command.install import INSTALL_SCHEMES return all( k in INSTALL_SCHEMES and _looks_like_red_hat_patched_platlib_purelib(INSTALL_SCHEMES[k]) for k in ("unix_prefix", "unix_home") ) @functools.cache def _looks_like_debian_scheme() -> bool: """Debian adds two additional schemes.""" from distutils.command.install import INSTALL_SCHEMES return "deb_system" in INSTALL_SCHEMES and "unix_local" in INSTALL_SCHEMES @functools.cache def _looks_like_red_hat_scheme() -> bool: """Red Hat patches ``sys.prefix`` and ``sys.exec_prefix``. Red Hat's ``00251-change-user-install-location.patch`` changes the install command's ``prefix`` and ``exec_prefix`` to append ``"/local"``. This is (fortunately?) done quite unconditionally, so we create a default command object without any configuration to detect this. """ from distutils.command.install import install from distutils.dist import Distribution cmd: Any = install(Distribution()) cmd.finalize_options() return ( cmd.exec_prefix == f"{os.path.normpath(sys.exec_prefix)}/local" and cmd.prefix == f"{os.path.normpath(sys.prefix)}/local" ) @functools.cache def _looks_like_slackware_scheme() -> bool: """Slackware patches sysconfig but fails to patch distutils and site. Slackware changes sysconfig's user scheme to use ``"lib64"`` for the lib path, but does not do the same to the site module. """ if user_site is None: # User-site not available. return False try: paths = sysconfig.get_paths(scheme="posix_user", expand=False) except KeyError: # User-site not available. return False return "/lib64/" in paths["purelib"] and "/lib64/" not in user_site @functools.cache def _looks_like_msys2_mingw_scheme() -> bool: """MSYS2 patches distutils and sysconfig to use a UNIX-like scheme. However, MSYS2 incorrectly patches sysconfig ``nt`` scheme. The fix is likely going to be included in their 3.10 release, so we ignore the warning. See msys2/MINGW-packages#9319. MSYS2 MINGW's patch uses lowercase ``"lib"`` instead of the usual uppercase, and is missing the final ``"site-packages"``. """ paths = sysconfig.get_paths("nt", expand=False) return all( "Lib" not in p and "lib" in p and not p.endswith("site-packages") for p in (paths[key] for key in ("platlib", "purelib")) ) @functools.cache def _warn_mismatched(old: pathlib.Path, new: pathlib.Path, , key: str) -> None: issue_url = "https://github.com/pypa/pip/issues/10151" message = ( "Value for %s does not match. Please report this to <%s>" "\ndistutils: %s" "\nsysconfig: %s" ) logger.log(_MISMATCH_LEVEL, message, key, issue_url, old, new) def _warn_if_mismatch(old: pathlib.Path, new: pathlib.Path, , key: str) -> bool: if old == new: return False _warn_mismatched(old, new, key=key) return True @functools.cache def _log_context( *, user: bool = False, home: str \| None = None, root: str \| None = None, prefix: str \| None = None, ) -> None: parts = [ "Additional context:", "user = %r", "home = %r", "root = %r", "prefix = %r", ] logger.log(_MISMATCH_LEVEL, "\n".join(parts), user, home, root, prefix) def get_scheme( dist_name: str, user: bool = False, home: str \| None = None, root: str \| None = None, isolated: bool = False, prefix: str \| None = None, ) -> Scheme: new = _sysconfig.get_scheme( dist_name, user=user, home=home, root=root, isolated=isolated, prefix=prefix, ) if _USE_SYSCONFIG: return new old = _distutils.get_scheme( dist_name, user=user, home=home, root=root, isolated=isolated, prefix=prefix, ) warning_contexts = [] for k in SCHEME_KEYS: old_v = pathlib.Path(getattr(old, k)) new_v = pathlib.Path(getattr(new, k)) if old_v == new_v: continue # distutils incorrectly put PyPy packages under ``site-packages/python`` # in the ``posix_home`` scheme, but PyPy devs said they expect the # directory name to be ``pypy`` instead. So we treat this as a bug fix # and not warn about it. See bpo-43307 and python/cpython#24628. skip_pypy_special_case = ( sys.implementation.name == "pypy" and home is not None and k in ("platlib", "purelib") and old_v.parent == new_v.parent and old_v.name.startswith("python") and new_v.name.startswith("pypy") ) if skip_pypy_special_case: continue # sysconfig's ``osx_framework_user`` does not include ``pythonX.Y`` in # the ``include`` value, but distutils's ``headers`` does. We'll let # CPython decide whether this is a bug or feature. See bpo-43948. skip_osx_framework_user_special_case = ( user and is_osx_framework() and k == "headers" and old_v.parent.parent == new_v.parent and old_v.parent.name.startswith("python") ) if skip_osx_framework_user_special_case: continue # On Red Hat and derived Linux distributions, distutils is patched to # use "lib64" instead of "lib" for platlib. if k == "platlib" and _looks_like_red_hat_lib(): continue # On Python 3.9+, sysconfig's posix_user scheme sets platlib against # sys.platlibdir, but distutils's unix_user incorrectly continues # using the same $usersite for both platlib and purelib. This creates a # mismatch when sys.platlibdir is not "lib". skip_bpo_44860 = ( user and k == "platlib" and not WINDOWS and _PLATLIBDIR != "lib" and _looks_like_bpo_44860() ) if skip_bpo_44860: continue # Slackware incorrectly patches posix_user to use lib64 instead of lib, # but not usersite to match the location. skip_slackware_user_scheme = ( user and k in ("platlib", "purelib") and not WINDOWS and _looks_like_slackware_scheme() ) if skip_slackware_user_scheme: continue # Both Debian and Red Hat patch Python to place the system site under # /usr/local instead of /usr. Debian also places lib in dist-packages # instead of site-packages, but the /usr/local check should cover it. skip_linux_system_special_case = ( not (user or home or prefix or running_under_virtualenv()) and old_v.parts[1:3] == ("usr", "local") and len(new_v.parts) > 1 and new_v.parts[1] == "usr" and (len(new_v.parts) < 3 or new_v.parts[2] != "local") and (_looks_like_red_hat_scheme() or _looks_like_debian_scheme()) ) if skip_linux_system_special_case: continue # MSYS2 MINGW's sysconfig patch does not include the "site-packages" # part of the path. This is incorrect and will be fixed in MSYS. skip_msys2_mingw_bug = ( WINDOWS and k in ("platlib", "purelib") and _looks_like_msys2_mingw_scheme() ) if skip_msys2_mingw_bug: continue # CPython's POSIX install script invokes pip (via ensurepip) against the # interpreter located in the source tree, not the install site. This # triggers special logic in sysconfig that's not present in distutils. # https://github.com/python/cpython/blob/8c21941ddaf/Lib/sysconfig.py#L178-L194 skip_cpython_build = ( sysconfig.is_python_build(check_home=True) and not WINDOWS and k in ("headers", "include", "platinclude") ) if skip_cpython_build: continue warning_contexts.append((old_v, new_v, f"scheme.{k}")) if not warning_contexts: return old # Check if this path mismatch is caused by distutils config files. Those # files will no longer work once we switch to sysconfig, so this raises a # deprecation message for them. default_old = _distutils.distutils_scheme( dist_name, user, home, root, isolated, prefix, ignore_config_files=True, ) if any(default_old[k] != getattr(old, k) for k in SCHEME_KEYS): deprecated( reason=( "Configuring installation scheme with distutils config files " "is deprecated and will no longer work in the near future. If you " "are using a Homebrew or Linuxbrew Python, please see discussion " "at https://github.com/Homebrew/homebrew-core/issues/76621" ), replacement=None, gone_in=None, ) return old # Post warnings about this mismatch so user can report them back. for old_v, new_v, key in warning_contexts: _warn_mismatched(old_v, new_v, key=key) _log_context(user=user, home=home, root=root, prefix=prefix) return old def get_bin_prefix() -> str: new = _sysconfig.get_bin_prefix() if _USE_SYSCONFIG: return new old = _distutils.get_bin_prefix() if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="bin_prefix"): _log_context() return old def get_bin_user() -> str: return _sysconfig.get_scheme("", user=True).scripts def _looks_like_deb_system_dist_packages(value: str) -> bool: """Check if the value is Debian's APT-controlled dist-packages. Debian's ``distutils.sysconfig.get_python_lib()`` implementation returns the default package path controlled by APT, but does not patch ``sysconfig`` to do the same. This is similar to the bug worked around in ``get_scheme()``, but here the default is ``deb_system`` instead of ``unix_local``. Ultimately we can't do anything about this Debian bug, and this detection allows us to skip the warning when needed. """ if not _looks_like_debian_scheme(): return False if value == "/usr/lib/python3/dist-packages": return True return False def get_purelib() -> str: """Return the default pure-Python lib location.""" new = _sysconfig.get_purelib() if _USE_SYSCONFIG: return new old = _distutils.get_purelib() if _looks_like_deb_system_dist_packages(old): return old if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="purelib"): _log_context() return old def get_platlib() -> str: """Return the default platform-shared lib location.""" new = _sysconfig.get_platlib() if _USE_SYSCONFIG: return new from . import _distutils old = _distutils.get_platlib() if _looks_like_deb_system_dist_packages(old): return old if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="platlib"): _log_context() return old	13.85 KB	2026-01-20 12:58
📁 __pycache__	-	2026-03-21 15:45
📄 _distutils.py """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 # If pip's going to use distutils, it should not be using the copy that setuptools # might have injected into the environment. This is done by removing the injected # shim, if it's injected. # # See https://github.com/pypa/pip/issues/8761 for the original discussion and # rationale for why this is done within pip. from __future__ import annotations try: __import__("_distutils_hack").remove_shim() except (ImportError, AttributeError): pass import logging import os import sys from distutils.cmd import Command as DistutilsCommand from distutils.command.install import SCHEME_KEYS from distutils.command.install import install as distutils_install_command from distutils.sysconfig import get_python_lib from pip._internal.models.scheme import Scheme from pip._internal.utils.compat import WINDOWS from pip._internal.utils.virtualenv import running_under_virtualenv from .base import get_major_minor_version logger = logging.getLogger(__name__) def distutils_scheme( dist_name: str, user: bool = False, home: str \| None = None, root: str \| None = None, isolated: bool = False, prefix: str \| None = None, , ignore_config_files: bool = False, ) -> dict[str, str]: """ Return a distutils install scheme """ from distutils.dist import Distribution dist_args: dict[str, str \| list[str]] = {"name": dist_name} if isolated: dist_args["script_args"] = ["--no-user-cfg"] d = Distribution(dist_args) if not ignore_config_files: try: d.parse_config_files() except UnicodeDecodeError: paths = d.find_config_files() logger.warning( "Ignore distutils configs in %s due to encoding errors.", ", ".join(os.path.basename(p) for p in paths), ) obj: DistutilsCommand \| None = None obj = d.get_command_obj("install", create=True) assert obj is not None i: 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), f"user={user} prefix={prefix}" assert not (home and prefix), f"home={home} prefix={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: dict[str, str] = {} 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({"purelib": i.install_lib, "platlib": i.install_lib}) if running_under_virtualenv(): if home: prefix = home elif user: prefix = i.install_userbase else: prefix = i.prefix scheme["headers"] = os.path.join( prefix, "include", "site", f"python{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: str, user: bool = False, home: str \| None = None, root: str \| None = None, isolated: bool = False, prefix: str \| None = None, ) -> 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"], ) def get_bin_prefix() -> str: # XXX: In old virtualenv versions, sys.prefix can contain '..' components, # so we need to call normpath to eliminate them. prefix = os.path.normpath(sys.prefix) if WINDOWS: bin_py = os.path.join(prefix, "Scripts") # buildout uses 'bin' on Windows too? if not os.path.exists(bin_py): bin_py = os.path.join(prefix, "bin") return bin_py # 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 prefix[:16] == "/System/Library/": return "/usr/local/bin" return os.path.join(prefix, "bin") def get_purelib() -> str: return get_python_lib(plat_specific=False) def get_platlib() -> str: return get_python_lib(plat_specific=True)	5.83 KB	2026-01-20 12:58
📄 _sysconfig.py from __future__ import annotations import logging import os import sys import sysconfig from pip._internal.exceptions import InvalidSchemeCombination, UserInstallationInvalid from pip._internal.models.scheme import SCHEME_KEYS, Scheme from pip._internal.utils.virtualenv import running_under_virtualenv from .base import change_root, get_major_minor_version, is_osx_framework logger = logging.getLogger(__name__) # Notes on _infer_* functions. # Unfortunately ``get_default_scheme()`` didn't exist before 3.10, so there's no # way to ask things like "what is the '_prefix' scheme on this platform". These # functions try to answer that with some heuristics while accounting for ad-hoc # platforms not covered by CPython's default sysconfig implementation. If the # ad-hoc implementation does not fully implement sysconfig, we'll fall back to # a POSIX scheme. _AVAILABLE_SCHEMES = set(sysconfig.get_scheme_names()) _PREFERRED_SCHEME_API = getattr(sysconfig, "get_preferred_scheme", None) def _should_use_osx_framework_prefix() -> bool: """Check for Apple's ``osx_framework_library`` scheme. Python distributed by Apple's Command Line Tools has this special scheme that's used when: * This is a framework build. * We are installing into the system prefix. This does not account for ``pip install --prefix`` (also means we're not installing to the system prefix), which should use ``posix_prefix``, but logic here means ``_infer_prefix()`` outputs ``osx_framework_library``. But since ``prefix`` is not available for ``sysconfig.get_default_scheme()``, which is the stdlib replacement for ``_infer_prefix()``, presumably Apple wouldn't be able to magically switch between ``osx_framework_library`` and ``posix_prefix``. ``_infer_prefix()`` returning ``osx_framework_library`` means its behavior is consistent whether we use the stdlib implementation or our own, and we deal with this special case in ``get_scheme()`` instead. """ return ( "osx_framework_library" in _AVAILABLE_SCHEMES and not running_under_virtualenv() and is_osx_framework() ) def _infer_prefix() -> str: """Try to find a prefix scheme for the current platform. This tries: * A special ``osx_framework_library`` for Python distributed by Apple's Command Line Tools, when not running in a virtual environment. * Implementation + OS, used by PyPy on Windows (``pypy_nt``). * Implementation without OS, used by PyPy on POSIX (``pypy``). * OS + "prefix", used by CPython on POSIX (``posix_prefix``). * Just the OS name, used by CPython on Windows (``nt``). If none of the above works, fall back to ``posix_prefix``. """ if _PREFERRED_SCHEME_API: return _PREFERRED_SCHEME_API("prefix") if _should_use_osx_framework_prefix(): return "osx_framework_library" implementation_suffixed = f"{sys.implementation.name}_{os.name}" if implementation_suffixed in _AVAILABLE_SCHEMES: return implementation_suffixed if sys.implementation.name in _AVAILABLE_SCHEMES: return sys.implementation.name suffixed = f"{os.name}_prefix" if suffixed in _AVAILABLE_SCHEMES: return suffixed if os.name in _AVAILABLE_SCHEMES: # On Windows, prefx is just called "nt". return os.name return "posix_prefix" def _infer_user() -> str: """Try to find a user scheme for the current platform.""" if _PREFERRED_SCHEME_API: return _PREFERRED_SCHEME_API("user") if is_osx_framework() and not running_under_virtualenv(): suffixed = "osx_framework_user" else: suffixed = f"{os.name}_user" if suffixed in _AVAILABLE_SCHEMES: return suffixed if "posix_user" not in _AVAILABLE_SCHEMES: # User scheme unavailable. raise UserInstallationInvalid() return "posix_user" def _infer_home() -> str: """Try to find a home for the current platform.""" if _PREFERRED_SCHEME_API: return _PREFERRED_SCHEME_API("home") suffixed = f"{os.name}_home" if suffixed in _AVAILABLE_SCHEMES: return suffixed return "posix_home" # Update these keys if the user sets a custom home. _HOME_KEYS = [ "installed_base", "base", "installed_platbase", "platbase", "prefix", "exec_prefix", ] if sysconfig.get_config_var("userbase") is not None: _HOME_KEYS.append("userbase") def get_scheme( dist_name: str, user: bool = False, home: str \| None = None, root: str \| None = None, isolated: bool = False, prefix: str \| None = None, ) -> Scheme: """ Get the "scheme" corresponding to the input parameters. :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 :param root: root under which other directories are re-based :param isolated: ignored, but kept for distutils compatibility (where this controls whether the user-site pydistutils.cfg is honored) :param prefix: indicates to use the "prefix" scheme and provides the base directory for the same """ if user and prefix: raise InvalidSchemeCombination("--user", "--prefix") if home and prefix: raise InvalidSchemeCombination("--home", "--prefix") if home is not None: scheme_name = _infer_home() elif user: scheme_name = _infer_user() else: scheme_name = _infer_prefix() # Special case: When installing into a custom prefix, use posix_prefix # instead of osx_framework_library. See _should_use_osx_framework_prefix() # docstring for details. if prefix is not None and scheme_name == "osx_framework_library": scheme_name = "posix_prefix" if home is not None: variables = {k: home for k in _HOME_KEYS} elif prefix is not None: variables = {k: prefix for k in _HOME_KEYS} else: variables = {} paths = sysconfig.get_paths(scheme=scheme_name, vars=variables) # Logic here is very arbitrary, we're doing it for compatibility, don't ask. # 1. Pip historically uses a special header path in virtual environments. # 2. If the distribution name is not known, distutils uses 'UNKNOWN'. We # only do the same when not running in a virtual environment because # pip's historical header path logic (see point 1) did not do this. if running_under_virtualenv(): if user: base = variables.get("userbase", sys.prefix) else: base = variables.get("base", sys.prefix) python_xy = f"python{get_major_minor_version()}" paths["include"] = os.path.join(base, "include", "site", python_xy) elif not dist_name: dist_name = "UNKNOWN" scheme = Scheme( platlib=paths["platlib"], purelib=paths["purelib"], headers=os.path.join(paths["include"], dist_name), scripts=paths["scripts"], data=paths["data"], ) if root is not None: converted_keys = {} for key in SCHEME_KEYS: converted_keys[key] = change_root(root, getattr(scheme, key)) scheme = Scheme(**converted_keys) return scheme def get_bin_prefix() -> str: # Forcing to use /usr/local/bin for standard macOS framework installs. if sys.platform[:6] == "darwin" and sys.prefix[:16] == "/System/Library/": return "/usr/local/bin" return sysconfig.get_paths()["scripts"] def get_purelib() -> str: return sysconfig.get_paths()["purelib"] def get_platlib() -> str: return sysconfig.get_paths()["platlib"]	7.54 KB	2026-01-20 12:58
📄 base.py 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"))	2.49 KB	2026-01-20 12:58

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