Tipragot
628be439b8
Cela permet de ne pas avoir de problèmes de compatibilité car python est dans le git.
560 lines
18 KiB
Python
560 lines
18 KiB
Python
"""Provide access to Python's configuration information. The specific
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configuration variables available depend heavily on the platform and
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configuration. The values may be retrieved using
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get_config_var(name), and the list of variables is available via
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get_config_vars().keys(). Additional convenience functions are also
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available.
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Written by: Fred L. Drake, Jr.
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Email: <fdrake@acm.org>
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"""
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import os
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import re
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import sys
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import sysconfig
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import pathlib
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from .errors import DistutilsPlatformError
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from . import py39compat
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from ._functools import pass_none
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IS_PYPY = '__pypy__' in sys.builtin_module_names
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# These are needed in a couple of spots, so just compute them once.
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PREFIX = os.path.normpath(sys.prefix)
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EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
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BASE_PREFIX = os.path.normpath(sys.base_prefix)
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BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
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# Path to the base directory of the project. On Windows the binary may
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# live in project/PCbuild/win32 or project/PCbuild/amd64.
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# set for cross builds
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if "_PYTHON_PROJECT_BASE" in os.environ:
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project_base = os.path.abspath(os.environ["_PYTHON_PROJECT_BASE"])
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else:
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if sys.executable:
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project_base = os.path.dirname(os.path.abspath(sys.executable))
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else:
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# sys.executable can be empty if argv[0] has been changed and Python is
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# unable to retrieve the real program name
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project_base = os.getcwd()
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def _is_python_source_dir(d):
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"""
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Return True if the target directory appears to point to an
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un-installed Python.
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"""
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modules = pathlib.Path(d).joinpath('Modules')
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return any(modules.joinpath(fn).is_file() for fn in ('Setup', 'Setup.local'))
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_sys_home = getattr(sys, '_home', None)
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def _is_parent(dir_a, dir_b):
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"""
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Return True if a is a parent of b.
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"""
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return os.path.normcase(dir_a).startswith(os.path.normcase(dir_b))
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if os.name == 'nt':
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@pass_none
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def _fix_pcbuild(d):
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# In a venv, sys._home will be inside BASE_PREFIX rather than PREFIX.
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prefixes = PREFIX, BASE_PREFIX
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matched = (
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prefix
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for prefix in prefixes
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if _is_parent(d, os.path.join(prefix, "PCbuild"))
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)
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return next(matched, d)
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project_base = _fix_pcbuild(project_base)
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_sys_home = _fix_pcbuild(_sys_home)
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def _python_build():
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if _sys_home:
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return _is_python_source_dir(_sys_home)
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return _is_python_source_dir(project_base)
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python_build = _python_build()
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# Calculate the build qualifier flags if they are defined. Adding the flags
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# to the include and lib directories only makes sense for an installation, not
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# an in-source build.
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build_flags = ''
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try:
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if not python_build:
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build_flags = sys.abiflags
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except AttributeError:
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# It's not a configure-based build, so the sys module doesn't have
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# this attribute, which is fine.
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pass
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def get_python_version():
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"""Return a string containing the major and minor Python version,
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leaving off the patchlevel. Sample return values could be '1.5'
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or '2.2'.
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"""
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return '%d.%d' % sys.version_info[:2]
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def get_python_inc(plat_specific=0, prefix=None):
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"""Return the directory containing installed Python header files.
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If 'plat_specific' is false (the default), this is the path to the
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non-platform-specific header files, i.e. Python.h and so on;
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otherwise, this is the path to platform-specific header files
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(namely pyconfig.h).
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If 'prefix' is supplied, use it instead of sys.base_prefix or
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sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
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"""
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default_prefix = BASE_EXEC_PREFIX if plat_specific else BASE_PREFIX
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resolved_prefix = prefix if prefix is not None else default_prefix
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try:
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getter = globals()[f'_get_python_inc_{os.name}']
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except KeyError:
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raise DistutilsPlatformError(
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"I don't know where Python installs its C header files "
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"on platform '%s'" % os.name
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)
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return getter(resolved_prefix, prefix, plat_specific)
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@pass_none
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def _extant(path):
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"""
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Replace path with None if it doesn't exist.
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"""
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return path if os.path.exists(path) else None
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def _get_python_inc_posix(prefix, spec_prefix, plat_specific):
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if IS_PYPY and sys.version_info < (3, 8):
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return os.path.join(prefix, 'include')
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return (
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_get_python_inc_posix_python(plat_specific)
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or _extant(_get_python_inc_from_config(plat_specific, spec_prefix))
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or _get_python_inc_posix_prefix(prefix)
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)
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def _get_python_inc_posix_python(plat_specific):
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"""
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Assume the executable is in the build directory. The
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pyconfig.h file should be in the same directory. Since
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the build directory may not be the source directory,
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use "srcdir" from the makefile to find the "Include"
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directory.
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"""
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if not python_build:
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return
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if plat_specific:
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return _sys_home or project_base
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incdir = os.path.join(get_config_var('srcdir'), 'Include')
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return os.path.normpath(incdir)
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def _get_python_inc_from_config(plat_specific, spec_prefix):
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"""
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If no prefix was explicitly specified, provide the include
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directory from the config vars. Useful when
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cross-compiling, since the config vars may come from
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the host
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platform Python installation, while the current Python
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executable is from the build platform installation.
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>>> monkeypatch = getfixture('monkeypatch')
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>>> gpifc = _get_python_inc_from_config
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>>> monkeypatch.setitem(gpifc.__globals__, 'get_config_var', str.lower)
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>>> gpifc(False, '/usr/bin/')
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>>> gpifc(False, '')
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>>> gpifc(False, None)
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'includepy'
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>>> gpifc(True, None)
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'confincludepy'
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"""
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if spec_prefix is None:
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return get_config_var('CONF' * plat_specific + 'INCLUDEPY')
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def _get_python_inc_posix_prefix(prefix):
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implementation = 'pypy' if IS_PYPY else 'python'
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python_dir = implementation + get_python_version() + build_flags
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return os.path.join(prefix, "include", python_dir)
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def _get_python_inc_nt(prefix, spec_prefix, plat_specific):
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if python_build:
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# Include both the include and PC dir to ensure we can find
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# pyconfig.h
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return (
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os.path.join(prefix, "include")
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+ os.path.pathsep
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+ os.path.join(prefix, "PC")
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)
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return os.path.join(prefix, "include")
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# allow this behavior to be monkey-patched. Ref pypa/distutils#2.
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def _posix_lib(standard_lib, libpython, early_prefix, prefix):
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if standard_lib:
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return libpython
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else:
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return os.path.join(libpython, "site-packages")
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def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
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"""Return the directory containing the Python library (standard or
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site additions).
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If 'plat_specific' is true, return the directory containing
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platform-specific modules, i.e. any module from a non-pure-Python
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module distribution; otherwise, return the platform-shared library
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directory. If 'standard_lib' is true, return the directory
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containing standard Python library modules; otherwise, return the
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directory for site-specific modules.
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If 'prefix' is supplied, use it instead of sys.base_prefix or
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sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
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"""
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if IS_PYPY and sys.version_info < (3, 8):
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# PyPy-specific schema
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if prefix is None:
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prefix = PREFIX
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if standard_lib:
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return os.path.join(prefix, "lib-python", sys.version[0])
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return os.path.join(prefix, 'site-packages')
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early_prefix = prefix
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if prefix is None:
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if standard_lib:
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prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
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else:
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prefix = plat_specific and EXEC_PREFIX or PREFIX
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if os.name == "posix":
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if plat_specific or standard_lib:
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# Platform-specific modules (any module from a non-pure-Python
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# module distribution) or standard Python library modules.
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libdir = getattr(sys, "platlibdir", "lib")
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else:
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# Pure Python
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libdir = "lib"
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implementation = 'pypy' if IS_PYPY else 'python'
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libpython = os.path.join(prefix, libdir, implementation + get_python_version())
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return _posix_lib(standard_lib, libpython, early_prefix, prefix)
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elif os.name == "nt":
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if standard_lib:
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return os.path.join(prefix, "Lib")
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else:
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return os.path.join(prefix, "Lib", "site-packages")
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else:
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raise DistutilsPlatformError(
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"I don't know where Python installs its library "
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"on platform '%s'" % os.name
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)
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def customize_compiler(compiler): # noqa: C901
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"""Do any platform-specific customization of a CCompiler instance.
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Mainly needed on Unix, so we can plug in the information that
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varies across Unices and is stored in Python's Makefile.
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"""
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if compiler.compiler_type == "unix":
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if sys.platform == "darwin":
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# Perform first-time customization of compiler-related
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# config vars on OS X now that we know we need a compiler.
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# This is primarily to support Pythons from binary
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# installers. The kind and paths to build tools on
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# the user system may vary significantly from the system
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# that Python itself was built on. Also the user OS
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# version and build tools may not support the same set
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# of CPU architectures for universal builds.
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global _config_vars
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# Use get_config_var() to ensure _config_vars is initialized.
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if not get_config_var('CUSTOMIZED_OSX_COMPILER'):
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import _osx_support
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_osx_support.customize_compiler(_config_vars)
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_config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
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(
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cc,
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cxx,
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cflags,
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ccshared,
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ldshared,
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shlib_suffix,
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ar,
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ar_flags,
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) = get_config_vars(
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'CC',
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'CXX',
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'CFLAGS',
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'CCSHARED',
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'LDSHARED',
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'SHLIB_SUFFIX',
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'AR',
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'ARFLAGS',
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)
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if 'CC' in os.environ:
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newcc = os.environ['CC']
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if 'LDSHARED' not in os.environ and ldshared.startswith(cc):
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# If CC is overridden, use that as the default
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# command for LDSHARED as well
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ldshared = newcc + ldshared[len(cc) :]
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cc = newcc
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if 'CXX' in os.environ:
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cxx = os.environ['CXX']
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if 'LDSHARED' in os.environ:
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ldshared = os.environ['LDSHARED']
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if 'CPP' in os.environ:
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cpp = os.environ['CPP']
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else:
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cpp = cc + " -E" # not always
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if 'LDFLAGS' in os.environ:
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ldshared = ldshared + ' ' + os.environ['LDFLAGS']
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if 'CFLAGS' in os.environ:
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cflags = cflags + ' ' + os.environ['CFLAGS']
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ldshared = ldshared + ' ' + os.environ['CFLAGS']
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if 'CPPFLAGS' in os.environ:
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cpp = cpp + ' ' + os.environ['CPPFLAGS']
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cflags = cflags + ' ' + os.environ['CPPFLAGS']
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ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
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if 'AR' in os.environ:
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ar = os.environ['AR']
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if 'ARFLAGS' in os.environ:
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archiver = ar + ' ' + os.environ['ARFLAGS']
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else:
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archiver = ar + ' ' + ar_flags
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cc_cmd = cc + ' ' + cflags
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compiler.set_executables(
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preprocessor=cpp,
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compiler=cc_cmd,
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compiler_so=cc_cmd + ' ' + ccshared,
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compiler_cxx=cxx,
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linker_so=ldshared,
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linker_exe=cc,
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archiver=archiver,
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)
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if 'RANLIB' in os.environ and compiler.executables.get('ranlib', None):
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compiler.set_executables(ranlib=os.environ['RANLIB'])
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compiler.shared_lib_extension = shlib_suffix
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def get_config_h_filename():
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"""Return full pathname of installed pyconfig.h file."""
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if python_build:
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if os.name == "nt":
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inc_dir = os.path.join(_sys_home or project_base, "PC")
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else:
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inc_dir = _sys_home or project_base
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return os.path.join(inc_dir, 'pyconfig.h')
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else:
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return sysconfig.get_config_h_filename()
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def get_makefile_filename():
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"""Return full pathname of installed Makefile from the Python build."""
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return sysconfig.get_makefile_filename()
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def parse_config_h(fp, g=None):
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"""Parse a config.h-style file.
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A dictionary containing name/value pairs is returned. If an
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optional dictionary is passed in as the second argument, it is
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used instead of a new dictionary.
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"""
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return sysconfig.parse_config_h(fp, vars=g)
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# Regexes needed for parsing Makefile (and similar syntaxes,
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# like old-style Setup files).
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_variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
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_findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
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_findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
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def parse_makefile(fn, g=None): # noqa: C901
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"""Parse a Makefile-style file.
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A dictionary containing name/value pairs is returned. If an
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optional dictionary is passed in as the second argument, it is
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used instead of a new dictionary.
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"""
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from distutils.text_file import TextFile
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fp = TextFile(
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fn, strip_comments=1, skip_blanks=1, join_lines=1, errors="surrogateescape"
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)
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if g is None:
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g = {}
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done = {}
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notdone = {}
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while True:
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line = fp.readline()
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if line is None: # eof
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break
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m = _variable_rx.match(line)
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if m:
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n, v = m.group(1, 2)
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v = v.strip()
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# `$$' is a literal `$' in make
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tmpv = v.replace('$$', '')
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if "$" in tmpv:
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notdone[n] = v
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else:
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try:
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v = int(v)
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except ValueError:
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# insert literal `$'
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done[n] = v.replace('$$', '$')
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else:
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done[n] = v
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# Variables with a 'PY_' prefix in the makefile. These need to
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# be made available without that prefix through sysconfig.
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# Special care is needed to ensure that variable expansion works, even
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# if the expansion uses the name without a prefix.
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renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
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# do variable interpolation here
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while notdone:
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for name in list(notdone):
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value = notdone[name]
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m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
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if m:
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n = m.group(1)
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found = True
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if n in done:
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item = str(done[n])
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elif n in notdone:
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# get it on a subsequent round
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found = False
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elif n in os.environ:
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# do it like make: fall back to environment
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item = os.environ[n]
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elif n in renamed_variables:
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if name.startswith('PY_') and name[3:] in renamed_variables:
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item = ""
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elif 'PY_' + n in notdone:
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found = False
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else:
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item = str(done['PY_' + n])
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else:
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done[n] = item = ""
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if found:
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after = value[m.end() :]
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value = value[: m.start()] + item + after
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if "$" in after:
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notdone[name] = value
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else:
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try:
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value = int(value)
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except ValueError:
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done[name] = value.strip()
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else:
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done[name] = value
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del notdone[name]
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if name.startswith('PY_') and name[3:] in renamed_variables:
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name = name[3:]
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if name not in done:
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done[name] = value
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else:
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# bogus variable reference; just drop it since we can't deal
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del notdone[name]
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fp.close()
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# strip spurious spaces
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for k, v in done.items():
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if isinstance(v, str):
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done[k] = v.strip()
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# save the results in the global dictionary
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g.update(done)
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return g
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def expand_makefile_vars(s, vars):
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"""Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in
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'string' according to 'vars' (a dictionary mapping variable names to
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values). Variables not present in 'vars' are silently expanded to the
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empty string. The variable values in 'vars' should not contain further
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variable expansions; if 'vars' is the output of 'parse_makefile()',
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you're fine. Returns a variable-expanded version of 's'.
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"""
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# This algorithm does multiple expansion, so if vars['foo'] contains
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# "${bar}", it will expand ${foo} to ${bar}, and then expand
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# ${bar}... and so forth. This is fine as long as 'vars' comes from
|
|
# 'parse_makefile()', which takes care of such expansions eagerly,
|
|
# according to make's variable expansion semantics.
|
|
|
|
while True:
|
|
m = _findvar1_rx.search(s) or _findvar2_rx.search(s)
|
|
if m:
|
|
(beg, end) = m.span()
|
|
s = s[0:beg] + vars.get(m.group(1)) + s[end:]
|
|
else:
|
|
break
|
|
return s
|
|
|
|
|
|
_config_vars = None
|
|
|
|
|
|
def get_config_vars(*args):
|
|
"""With no arguments, return a dictionary of all configuration
|
|
variables relevant for the current platform. Generally this includes
|
|
everything needed to build extensions and install both pure modules and
|
|
extensions. On Unix, this means every variable defined in Python's
|
|
installed Makefile; on Windows it's a much smaller set.
|
|
|
|
With arguments, return a list of values that result from looking up
|
|
each argument in the configuration variable dictionary.
|
|
"""
|
|
global _config_vars
|
|
if _config_vars is None:
|
|
_config_vars = sysconfig.get_config_vars().copy()
|
|
py39compat.add_ext_suffix(_config_vars)
|
|
|
|
return [_config_vars.get(name) for name in args] if args else _config_vars
|
|
|
|
|
|
def get_config_var(name):
|
|
"""Return the value of a single variable using the dictionary
|
|
returned by 'get_config_vars()'. Equivalent to
|
|
get_config_vars().get(name)
|
|
"""
|
|
if name == 'SO':
|
|
import warnings
|
|
|
|
warnings.warn('SO is deprecated, use EXT_SUFFIX', DeprecationWarning, 2)
|
|
return get_config_vars().get(name)
|