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 ?÷     """Provide access to Python's configuration information.  The specific
configuration variables available depend heavily on the platform and
configuration.  The values may be retrieved using
get_config_var(name), and the list of variables is available via
get_config_vars().keys().  Additional convenience functions are also
available.

Written by:   Fred L. Drake, Jr.
Email:        <fdrake@acm.org>
"""

__revision__ = "$Id$"

import os
import re
import string
import sys

from distutils.errors import DistutilsPlatformError

# These are needed in a couple of spots, so just compute them once.
PREFIX = os.path.normpath(sys.prefix)
EXEC_PREFIX = os.path.normpath(sys.exec_prefix)

# Path to the base directory of the project. On Windows the binary may
# live in project/PCBuild9.  If we're dealing with an x64 Windows build,
# it'll live in project/PCbuild/amd64.
project_base = os.path.dirname(os.path.abspath(sys.executable))
if os.name == "nt" and "pcbuild" in project_base[-8:].lower():
    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir))
# PC/VS7.1
if os.name == "nt" and "\\pc\\v" in project_base[-10:].lower():
    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
                                                os.path.pardir))
# PC/AMD64
if os.name == "nt" and "\\pcbuild\\amd64" in project_base[-14:].lower():
    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
                                                os.path.pardir))

# set for cross builds
if "_PYTHON_PROJECT_BASE" in os.environ:
    # this is the build directory, at least for posix
    project_base = os.path.normpath(os.environ["_PYTHON_PROJECT_BASE"])

# python_build: (Boolean) if true, we're either building Python or
# building an extension with an un-installed Python, so we use
# different (hard-wired) directories.
# Setup.local is available for Makefile builds including VPATH builds,
# Setup.dist is available on Windows
def _python_build():
    for fn in ("Setup.dist", "Setup.local"):
        if os.path.isfile(os.path.join(project_base, "Modules", fn)):
            return True
    return False
python_build = _python_build()


def get_python_version():
    """Return a string containing the major and minor Python version,
    leaving off the patchlevel.  Sample return values could be '1.5'
    or '2.2'.
    """
    return sys.version[:3]


def get_python_inc(plat_specific=0, prefix=None):
    """Return the directory containing installed Python header files.

    If 'plat_specific' is false (the default), this is the path to the
    non-platform-specific header files, i.e. Python.h and so on;
    otherwise, this is the path to platform-specific header files
    (namely pyconfig.h).

    If 'prefix' is supplied, use it instead of sys.prefix or
    sys.exec_prefix -- i.e., ignore 'plat_specific'.
    """
    if prefix is None:
        prefix = plat_specific and EXEC_PREFIX or PREFIX

    if os.name == "posix":
        if python_build:
            buildir = os.path.dirname(sys.executable)
            if plat_specific:
                # python.h is located in the buildir
                inc_dir = buildir
            else:
                # the source dir is relative to the buildir
                srcdir = os.path.abspath(os.path.join(buildir,
                                         get_config_var('srcdir')))
                # Include is located in the srcdir
                inc_dir = os.path.join(srcdir, "Include")
            return inc_dir
        return os.path.join(prefix, "include",
                            "python" + get_python_version() + (sys.pydebug and '-debug' or ''))
    elif os.name == "nt":
        return os.path.join(prefix, "include")
    elif os.name == "os2":
        return os.path.join(prefix, "Include")
    else:
        raise DistutilsPlatformError(
            "I don't know where Python installs its C header files "
            "on platform '%s'" % os.name)


def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
    """Return the directory containing