"""Provide access to Python's configuration information.

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"""

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import sys

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import os

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from os.path import pardir, realpath

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_INSTALL_SCHEMES = {

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'posix_prefix': {

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'stdlib': '{base}/lib64/python{py_version_short}',

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'platstdlib': '{platbase}/lib64/python{py_version_short}',

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'purelib': '{base}/lib/python{py_version_short}/site-packages',

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'platlib': '{platbase}/lib64/python{py_version_short}/site-packages',

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'include': '{base}/include/python{py_version_short}',

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'platinclude': '{platbase}/include/python{py_version_short}',

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'scripts': '{base}/bin',

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'data': '{base}',

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},

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'posix_home': {

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'stdlib': '{base}/lib64/python',

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'platstdlib': '{base}/lib64/python',

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'purelib': '{base}/lib/python',

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'platlib': '{base}/lib64/python',

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'include': '{base}/include/python',

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'platinclude': '{base}/include/python',

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'scripts': '{base}/bin',

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'data' : '{base}',

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},

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'nt': {

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'stdlib': '{base}/Lib',

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'platstdlib': '{base}/Lib',

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'purelib': '{base}/Lib/site-packages',

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'platlib': '{base}/Lib/site-packages',

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'include': '{base}/Include',

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'platinclude': '{base}/Include',

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'scripts': '{base}/Scripts',

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'data' : '{base}',

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},

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'os2': {

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'stdlib': '{base}/Lib',

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'platstdlib': '{base}/Lib',

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'purelib': '{base}/Lib/site-packages',

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'platlib': '{base}/Lib/site-packages',

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'include': '{base}/Include',

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'platinclude': '{base}/Include',

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'scripts': '{base}/Scripts',

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'data' : '{base}',

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},

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'os2_home': {

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'stdlib': '{userbase}/lib/python{py_version_short}',

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'platstdlib': '{userbase}/lib/python{py_version_short}',

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'purelib': '{userbase}/lib/python{py_version_short}/site-packages',

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'platlib': '{userbase}/lib/python{py_version_short}/site-packages',

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'include': '{userbase}/include/python{py_version_short}',

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'scripts': '{userbase}/bin',

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'data' : '{userbase}',

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},

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'nt_user': {

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'stdlib': '{userbase}/Python{py_version_nodot}',

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'platstdlib': '{userbase}/Python{py_version_nodot}',

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'purelib': '{userbase}/Python{py_version_nodot}/site-packages',

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'platlib': '{userbase}/Python{py_version_nodot}/site-packages',

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'include': '{userbase}/Python{py_version_nodot}/Include',

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'scripts': '{userbase}/Scripts',

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'data' : '{userbase}',

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},

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'posix_user': {

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'stdlib': '{userbase}/lib64/python{py_version_short}',

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'platstdlib': '{userbase}/lib64/python{py_version_short}',

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'purelib': '{userbase}/lib/python{py_version_short}/site-packages',

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'platlib': '{userbase}/lib64/python{py_version_short}/site-packages',

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'include': '{userbase}/include/python{py_version_short}',

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'scripts': '{userbase}/bin',

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'data' : '{userbase}',

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},

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'osx_framework_user': {

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'stdlib': '{userbase}/lib/python',

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'platstdlib': '{userbase}/lib/python',

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'purelib': '{userbase}/lib/python/site-packages',

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'platlib': '{userbase}/lib/python/site-packages',

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'include': '{userbase}/include',

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'scripts': '{userbase}/bin',

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'data' : '{userbase}',

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},

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}

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_SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include',

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'scripts', 'data')

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_PY_VERSION = sys.version.split()[0]

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_PY_VERSION_SHORT = sys.version[:3]

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_PY_VERSION_SHORT_NO_DOT = _PY_VERSION[0] + _PY_VERSION[2]

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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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_CONFIG_VARS = None

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_USER_BASE = None

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def _safe_realpath(path):

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try:

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return realpath(path)

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except OSError:

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return path

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if sys.executable:

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_PROJECT_BASE = os.path.dirname(_safe_realpath(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 = _safe_realpath(os.getcwd())

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if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():

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_PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir))

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# PC/VS7.1

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if os.name == "nt" and "\\pc\\v" in _PROJECT_BASE[-10:].lower():

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_PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))

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# PC/VS9.0/amd64

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if (os.name == "nt"

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and os.path.basename(os.path.dirname(os.path.dirname(_PROJECT_BASE))).lower() == "pc"

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and os.path.basename(os.path.dirname(_PROJECT_BASE)).lower() == "vs9.0"):

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_PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir, pardir))

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# PC/AMD64

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if os.name == "nt" and "\\pcbuild\\amd64" in _PROJECT_BASE[-14:].lower():

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_PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))

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# set for cross builds

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if "_PYTHON_PROJECT_BASE" in os.environ:

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# the build directory for posix builds

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_PROJECT_BASE = os.path.normpath(os.path.abspath("."))

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def is_python_build():

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for fn in ("Setup.dist", "Setup.local"):

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if os.path.isfile(os.path.join(_PROJECT_BASE, "Modules", fn)):

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return True

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return False

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_PYTHON_BUILD = is_python_build()

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if _PYTHON_BUILD:

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for scheme in ('posix_prefix', 'posix_home'):

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_INSTALL_SCHEMES[scheme]['include'] = '{projectbase}/Include'

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_INSTALL_SCHEMES[scheme]['platinclude'] = '{srcdir}'

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def _subst_vars(s, local_vars):

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try:

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return s.format(**local_vars)

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except KeyError:

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try:

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return s.format(**os.environ)

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except KeyError, var:

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raise AttributeError('{%s}' % var)

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def _extend_dict(target_dict, other_dict):

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target_keys = target_dict.keys()

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for key, value in other_dict.items():

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if key in target_keys:

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continue

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target_dict[key] = value

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def _expand_vars(scheme, vars):

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res = {}

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if vars is None:

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vars = {}

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_extend_dict(vars, get_config_vars())

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for key, value in _INSTALL_SCHEMES[scheme].items():

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if os.name in ('posix', 'nt'):

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value = os.path.expanduser(value)

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res[key] = os.path.normpath(_subst_vars(value, vars))

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return res

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def _get_default_scheme():

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if os.name == 'posix':

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# the default scheme for posix is posix_prefix

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return 'posix_prefix'

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return os.name

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def _getuserbase():

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env_base = os.environ.get("PYTHONUSERBASE", None)

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def joinuser(*args):

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return os.path.expanduser(os.path.join(*args))

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# what about 'os2emx', 'riscos' ?

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if os.name == "nt":

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base = os.environ.get("APPDATA") or "~"

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return env_base if env_base else joinuser(base, "Python")

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if sys.platform == "darwin":

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framework = get_config_var("PYTHONFRAMEWORK")

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if framework:

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return env_base if env_base else \

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joinuser("~", "Library", framework, "%d.%d"

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% (sys.version_info[:2]))

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return env_base if env_base else joinuser("~", ".local")

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def _parse_makefile(filename, vars=None):

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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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import re

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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("([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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if vars is None:

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vars = {}

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done = {}

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notdone = {}

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with open(filename) as f:

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lines = f.readlines()

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for line in lines:

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if line.startswith('#') or line.strip() == '':

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continue

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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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# do variable interpolation here

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while notdone:

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for name in notdone.keys():

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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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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: 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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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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# 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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vars.update(done)

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return vars

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def get_makefile_filename():

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"""Return the path of the Makefile."""

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if _PYTHON_BUILD:

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return os.path.join(_PROJECT_BASE, "Makefile")

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return os.path.join(get_path('platstdlib'), "config", "Makefile")

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# Issue #22199: retain undocumented private name for compatibility

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_get_makefile_filename = get_makefile_filename

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def _generate_posix_vars():

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"""Generate the Python module containing build-time variables."""

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import pprint

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vars = {}

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# load the installed Makefile:

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makefile = get_makefile_filename()

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try:

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_parse_makefile(makefile, vars)

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except IOError, e:

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msg = "invalid Python installation: unable to open %s" % makefile

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if hasattr(e, "strerror"):

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msg = msg + " (%s)" % e.strerror

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raise IOError(msg)

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# load the installed pyconfig.h:

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config_h = get_config_h_filename()

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try:

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with open(config_h) as f:

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parse_config_h(f, vars)

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except IOError, e:

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msg = "invalid Python installation: unable to open %s" % config_h

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if hasattr(e, "strerror"):

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msg = msg + " (%s)" % e.strerror

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raise IOError(msg)

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# On AIX, there are wrong paths to the linker scripts in the Makefile

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# -- these paths are relative to the Python source, but when installed

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# the scripts are in another directory.

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if _PYTHON_BUILD:

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vars['LDSHARED'] = vars['BLDSHARED']

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# There's a chicken-and-egg situation on OS X with regards to the

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# _sysconfigdata module after the changes introduced by #15298:

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# get_config_vars() is called by get_platform() as part of the

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# `make pybuilddir.txt` target -- which is a precursor to the

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# _sysconfigdata.py module being constructed. Unfortunately,

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# get_config_vars() eventually calls _init_posix(), which attempts

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# to import _sysconfigdata, which we won't have built yet. In order

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# for _init_posix() to work, if we're on Darwin, just mock up the

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# _sysconfigdata module manually and populate it with the build vars.

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# This is more than sufficient for ensuring the subsequent call to

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# get_platform() succeeds.

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name = '_sysconfigdata'

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if 'darwin' in sys.platform:

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import imp

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module = imp.new_module(name)

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module.build_time_vars = vars

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sys.modules[name] = module

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pybuilddir = 'build/lib.%s-%s' % (get_platform(), sys.version[:3])

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if hasattr(sys, "gettotalrefcount"):

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pybuilddir += '-pydebug'

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try:

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os.makedirs(pybuilddir)

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except OSError:

[343] Fix | Delete

pass

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destfile = os.path.join(pybuilddir, name + '.py')

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with open(destfile, 'wb') as f:

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f.write('# system configuration generated and used by'

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' the sysconfig module\n')

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f.write('build_time_vars = ')

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pprint.pprint(vars, stream=f)

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# Create file used for sys.path fixup -- see Modules/getpath.c

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with open('pybuilddir.txt', 'w') as f:

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f.write(pybuilddir)

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def _init_posix(vars):

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"""Initialize the module as appropriate for POSIX systems."""

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# _sysconfigdata is generated at build time, see _generate_posix_vars()

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from _sysconfigdata import build_time_vars

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vars.update(build_time_vars)

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def _init_non_posix(vars):

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"""Initialize the module as appropriate for NT"""

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# set basic install directories

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vars['LIBDEST'] = get_path('stdlib')

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vars['BINLIBDEST'] = get_path('platstdlib')

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vars['INCLUDEPY'] = get_path('include')

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vars['SO'] = '.pyd'

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vars['EXE'] = '.exe'

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vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT

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vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))

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#

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# public APIs

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#

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def parse_config_h(fp, vars=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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import re

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if vars is None:

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vars = {}

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define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")

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undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")

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while True:

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line = fp.readline()

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if not line:

[394] Fix | Delete

break

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m = define_rx.match(line)

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if m:

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n, v = m.group(1, 2)

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try: v = int(v)

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except ValueError: pass

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vars[n] = v

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else:

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m = undef_rx.match(line)

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if m:

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vars[m.group(1)] = 0

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return vars

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def get_config_h_filename():

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"""Returns the path of pyconfig.h."""

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if _PYTHON_BUILD:

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if os.name == "nt":

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inc_dir = os.path.join(_PROJECT_BASE, "PC")

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else:

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inc_dir = _PROJECT_BASE

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else:

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inc_dir = get_path('platinclude')

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return os.path.join(inc_dir, 'pyconfig-64.h')

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def get_scheme_names():

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"""Returns a tuple containing the schemes names."""

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schemes = _INSTALL_SCHEMES.keys()

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schemes.sort()

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return tuple(schemes)

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def get_path_names():

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"""Returns a tuple containing the paths names."""

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return _SCHEME_KEYS

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def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):

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"""Returns a mapping containing an install scheme.

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``scheme`` is the install scheme name. If not provided, it will

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return the default scheme for the current platform.

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"""

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if expand:

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return _expand_vars(scheme, vars)

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else:

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return _INSTALL_SCHEMES[scheme]

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def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):

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"""Returns a path corresponding to the scheme.

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``scheme`` is the install scheme name.

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"""

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return get_paths(scheme, vars, expand)[name]

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def get_config_vars(*args):

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"""With no arguments, return a dictionary of all configuration

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variables relevant for the current platform.

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On Unix, this means every variable defined in Python's installed Makefile;

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On Windows and Mac OS it's a much smaller set.

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With arguments, return a list of values that result from looking up

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each argument in the configuration variable dictionary.

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"""

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import re

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global _CONFIG_VARS

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if _CONFIG_VARS is None:

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_CONFIG_VARS = {}

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# Normalized versions of prefix and exec_prefix are handy to have;

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# in fact, these are the standard versions used most places in the

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# Distutils.

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_CONFIG_VARS['prefix'] = _PREFIX

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_CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX

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_CONFIG_VARS['py_version'] = _PY_VERSION

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_CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT

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_CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]

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_CONFIG_VARS['base'] = _PREFIX

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_CONFIG_VARS['platbase'] = _EXEC_PREFIX

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_CONFIG_VARS['projectbase'] = _PROJECT_BASE

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if os.name in ('nt', 'os2'):

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_init_non_posix(_CONFIG_VARS)

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if os.name == 'posix':

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_init_posix(_CONFIG_VARS)

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# Setting 'userbase' is done below the call to the

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# init function to enable using 'get_config_var' in

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# the init-function.

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_CONFIG_VARS['userbase'] = _getuserbase()

[481] Fix | Delete

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if 'srcdir' not in _CONFIG_VARS:

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_CONFIG_VARS['srcdir'] = _PROJECT_BASE

[484] Fix | Delete

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# Convert srcdir into an absolute path if it appears necessary.

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# Normally it is relative to the build directory. However, during

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# testing, for example, we might be running a non-installed python

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# from a different directory.

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if _PYTHON_BUILD and os.name == "posix":

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base = _PROJECT_BASE

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try:

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cwd = os.getcwd()

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except OSError:

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cwd = None

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if (not os.path.isabs(_CONFIG_VARS['srcdir']) and

[496] Fix | Delete

base != cwd):

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# srcdir is relative and we are not in the same directory

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# as the executable. Assume executable is in the build

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