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151 lines
5.1 KiB
151 lines
5.1 KiB
"""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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import os
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import sys
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from distutils.cmd import Command as DistutilsCommand
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from distutils.command.install import SCHEME_KEYS
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from distutils.command.install import install as distutils_install_command
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from distutils.sysconfig import get_python_lib
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from typing import Dict, List, Optional, Tuple, Union, cast
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from pip._internal.models.scheme import Scheme
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from pip._internal.utils.compat import WINDOWS
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from pip._internal.utils.virtualenv import running_under_virtualenv
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from .base import get_major_minor_version
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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), f"user={user} prefix={prefix}"
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assert not (home and prefix), f"home={home} prefix={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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i.prefix,
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"include",
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"site",
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f"python{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(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(dist_name, user, home, root, isolated, prefix)
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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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def get_bin_prefix():
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# type: () -> str
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if WINDOWS:
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bin_py = os.path.join(sys.prefix, "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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return bin_py
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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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return "/usr/local/bin"
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return os.path.join(sys.prefix, "bin")
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def get_purelib():
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# type: () -> str
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return get_python_lib(plat_specific=False)
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def get_platlib():
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# type: () -> str
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return get_python_lib(plat_specific=True)
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def get_prefixed_libs(prefix):
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# type: (str) -> Tuple[str, str]
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return (
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get_python_lib(plat_specific=False, prefix=prefix),
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get_python_lib(plat_specific=True, prefix=prefix),
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)
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