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_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. 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 typing import Dict, List, Optional, Union 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: Optional[str] = None, root: Optional[str] = None, isolated: bool = False, prefix: Optional[str] = None, *, ignore_config_files: bool = False, ) -> Dict[str, str]: """ Return a distutils install scheme """ from distutils.dist import Distribution dist_args: Dict[str, Union[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: Optional[DistutilsCommand] = 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: Optional[str] = None, root: Optional[str] = None, isolated: bool = False, prefix: Optional[str] = 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)
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