/lib-python/2.7/sysconfig.py
Python | 589 lines | 551 code | 6 blank | 32 comment | 21 complexity | eaacadda82d52f4ec0cb7153983ab79f MD5 | raw file
- """Provide access to Python's configuration information.
- """
- import sys
- import os
- from os.path import pardir, realpath
- _INSTALL_SCHEMES = {
- 'posix_prefix': {
- 'stdlib': '{base}/lib/python{py_version_short}',
- 'platstdlib': '{platbase}/lib/python{py_version_short}',
- 'purelib': '{base}/lib/python{py_version_short}/site-packages',
- 'platlib': '{platbase}/lib/python{py_version_short}/site-packages',
- 'include': '{base}/include/python{py_version_short}',
- 'platinclude': '{platbase}/include/python{py_version_short}',
- 'scripts': '{base}/bin',
- 'data': '{base}',
- },
- 'posix_home': {
- 'stdlib': '{base}/lib/python',
- 'platstdlib': '{base}/lib/python',
- 'purelib': '{base}/lib/python',
- 'platlib': '{base}/lib/python',
- 'include': '{base}/include/python',
- 'platinclude': '{base}/include/python',
- 'scripts': '{base}/bin',
- 'data' : '{base}',
- },
- 'pypy': {
- 'stdlib': '{base}/lib-python',
- 'platstdlib': '{base}/lib-python',
- 'purelib': '{base}/lib-python',
- 'platlib': '{base}/lib-python',
- 'include': '{base}/include',
- 'platinclude': '{base}/include',
- 'scripts': '{base}/bin',
- 'data' : '{base}',
- },
- 'nt': {
- 'stdlib': '{base}/Lib',
- 'platstdlib': '{base}/Lib',
- 'purelib': '{base}/Lib/site-packages',
- 'platlib': '{base}/Lib/site-packages',
- 'include': '{base}/Include',
- 'platinclude': '{base}/Include',
- 'scripts': '{base}/Scripts',
- 'data' : '{base}',
- },
- 'os2': {
- 'stdlib': '{base}/Lib',
- 'platstdlib': '{base}/Lib',
- 'purelib': '{base}/Lib/site-packages',
- 'platlib': '{base}/Lib/site-packages',
- 'include': '{base}/Include',
- 'platinclude': '{base}/Include',
- 'scripts': '{base}/Scripts',
- 'data' : '{base}',
- },
- 'os2_home': {
- 'stdlib': '{userbase}/lib/python{py_version_short}',
- 'platstdlib': '{userbase}/lib/python{py_version_short}',
- 'purelib': '{userbase}/lib/python{py_version_short}/site-packages',
- 'platlib': '{userbase}/lib/python{py_version_short}/site-packages',
- 'include': '{userbase}/include/python{py_version_short}',
- 'scripts': '{userbase}/bin',
- 'data' : '{userbase}',
- },
- 'nt_user': {
- 'stdlib': '{userbase}/Python{py_version_nodot}',
- 'platstdlib': '{userbase}/Python{py_version_nodot}',
- 'purelib': '{userbase}/Python{py_version_nodot}/site-packages',
- 'platlib': '{userbase}/Python{py_version_nodot}/site-packages',
- 'include': '{userbase}/Python{py_version_nodot}/Include',
- 'scripts': '{userbase}/Scripts',
- 'data' : '{userbase}',
- },
- 'posix_user': {
- 'stdlib': '{userbase}/lib/python{py_version_short}',
- 'platstdlib': '{userbase}/lib/python{py_version_short}',
- 'purelib': '{userbase}/lib/python{py_version_short}/site-packages',
- 'platlib': '{userbase}/lib/python{py_version_short}/site-packages',
- 'include': '{userbase}/include/python{py_version_short}',
- 'scripts': '{userbase}/bin',
- 'data' : '{userbase}',
- },
- 'osx_framework_user': {
- 'stdlib': '{userbase}/lib/python',
- 'platstdlib': '{userbase}/lib/python',
- 'purelib': '{userbase}/lib/python/site-packages',
- 'platlib': '{userbase}/lib/python/site-packages',
- 'include': '{userbase}/include',
- 'scripts': '{userbase}/bin',
- 'data' : '{userbase}',
- },
- }
- _SCHEME_KEYS = ('stdlib', 'platstdlib', 'purelib', 'platlib', 'include',
- 'scripts', 'data')
- _PY_VERSION = sys.version.split()[0]
- _PY_VERSION_SHORT = sys.version[:3]
- _PY_VERSION_SHORT_NO_DOT = _PY_VERSION[0] + _PY_VERSION[2]
- _PREFIX = os.path.normpath(sys.prefix)
- _EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
- _CONFIG_VARS = None
- _USER_BASE = None
- def _safe_realpath(path):
- try:
- return realpath(path)
- except OSError:
- return path
- if sys.executable:
- _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
- else:
- # sys.executable can be empty if argv[0] has been changed and Python is
- # unable to retrieve the real program name
- _PROJECT_BASE = _safe_realpath(os.getcwd())
- if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():
- _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir))
- # PC/VS7.1
- if os.name == "nt" and "\\pc\\v" in _PROJECT_BASE[-10:].lower():
- _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
- # PC/AMD64
- if os.name == "nt" and "\\pcbuild\\amd64" in _PROJECT_BASE[-14:].lower():
- _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
- def is_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 = is_python_build()
- if _PYTHON_BUILD:
- for scheme in ('posix_prefix', 'posix_home'):
- _INSTALL_SCHEMES[scheme]['include'] = '{projectbase}/Include'
- _INSTALL_SCHEMES[scheme]['platinclude'] = '{srcdir}'
- def _subst_vars(s, local_vars):
- try:
- return s.format(**local_vars)
- except KeyError:
- try:
- return s.format(**os.environ)
- except KeyError, var:
- raise AttributeError('{%s}' % var)
- def _extend_dict(target_dict, other_dict):
- target_keys = target_dict.keys()
- for key, value in other_dict.items():
- if key in target_keys:
- continue
- target_dict[key] = value
- def _expand_vars(scheme, vars):
- res = {}
- if vars is None:
- vars = {}
- _extend_dict(vars, get_config_vars())
- for key, value in _INSTALL_SCHEMES[scheme].items():
- if os.name in ('posix', 'nt'):
- value = os.path.expanduser(value)
- res[key] = os.path.normpath(_subst_vars(value, vars))
- return res
- def _get_default_scheme():
- if '__pypy__' in sys.builtin_module_names:
- return 'pypy'
- elif os.name == 'posix':
- # the default scheme for posix is posix_prefix
- return 'posix_prefix'
- return os.name
- def _getuserbase():
- env_base = os.environ.get("PYTHONUSERBASE", None)
- def joinuser(*args):
- return os.path.expanduser(os.path.join(*args))
- # what about 'os2emx', 'riscos' ?
- if os.name == "nt":
- base = os.environ.get("APPDATA") or "~"
- return env_base if env_base else joinuser(base, "Python")
- if sys.platform == "darwin":
- framework = get_config_var("PYTHONFRAMEWORK")
- if framework:
- return env_base if env_base else \
- joinuser("~", "Library", framework, "%d.%d"
- % (sys.version_info[:2]))
- return env_base if env_base else joinuser("~", ".local")
- def _init_posix(vars):
- """Initialize the module as appropriate for POSIX systems."""
- return
- def _init_non_posix(vars):
- """Initialize the module as appropriate for NT"""
- # set basic install directories
- vars['LIBDEST'] = get_path('stdlib')
- vars['BINLIBDEST'] = get_path('platstdlib')
- vars['INCLUDEPY'] = get_path('include')
- vars['SO'] = '.pyd'
- vars['EXE'] = '.exe'
- vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
- vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
- #
- # public APIs
- #
- def parse_config_h(fp, vars=None):
- """Parse a config.h-style file.
- A dictionary containing name/value pairs is returned. If an
- optional dictionary is passed in as the second argument, it is
- used instead of a new dictionary.
- """
- import re
- if vars is None:
- vars = {}
- define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
- undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
- while True:
- line = fp.readline()
- if not line:
- break
- m = define_rx.match(line)
- if m:
- n, v = m.group(1, 2)
- try: v = int(v)
- except ValueError: pass
- vars[n] = v
- else:
- m = undef_rx.match(line)
- if m:
- vars[m.group(1)] = 0
- return vars
- def get_config_h_filename():
- """Returns the path of pyconfig.h."""
- if _PYTHON_BUILD:
- if os.name == "nt":
- inc_dir = os.path.join(_PROJECT_BASE, "PC")
- else:
- inc_dir = _PROJECT_BASE
- else:
- inc_dir = get_path('platinclude')
- return os.path.join(inc_dir, 'pyconfig.h')
- def get_scheme_names():
- """Returns a tuple containing the schemes names."""
- schemes = _INSTALL_SCHEMES.keys()
- schemes.sort()
- return tuple(schemes)
- def get_path_names():
- """Returns a tuple containing the paths names."""
- return _SCHEME_KEYS
- def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):
- """Returns a mapping containing an install scheme.
- ``scheme`` is the install scheme name. If not provided, it will
- return the default scheme for the current platform.
- """
- if expand:
- return _expand_vars(scheme, vars)
- else:
- return _INSTALL_SCHEMES[scheme]
- def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):
- """Returns a path corresponding to the scheme.
- ``scheme`` is the install scheme name.
- """
- return get_paths(scheme, vars, expand)[name]
- def get_config_vars(*args):
- """With no arguments, return a dictionary of all configuration
- variables relevant for the current platform.
- On Unix, this means every variable defined in Python's installed Makefile;
- On Windows and Mac OS 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.
- """
- import re
- global _CONFIG_VARS
- if _CONFIG_VARS is None:
- _CONFIG_VARS = {}
- # Normalized versions of prefix and exec_prefix are handy to have;
- # in fact, these are the standard versions used most places in the
- # Distutils.
- _CONFIG_VARS['prefix'] = _PREFIX
- _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
- _CONFIG_VARS['py_version'] = _PY_VERSION
- _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
- _CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]
- _CONFIG_VARS['base'] = _PREFIX
- _CONFIG_VARS['platbase'] = _EXEC_PREFIX
- _CONFIG_VARS['projectbase'] = _PROJECT_BASE
- if os.name in ('nt', 'os2'):
- _init_non_posix(_CONFIG_VARS)
- if os.name == 'posix':
- _init_posix(_CONFIG_VARS)
- # Setting 'userbase' is done below the call to the
- # init function to enable using 'get_config_var' in
- # the init-function.
- _CONFIG_VARS['userbase'] = _getuserbase()
- if 'srcdir' not in _CONFIG_VARS:
- _CONFIG_VARS['srcdir'] = _PROJECT_BASE
- # Convert srcdir into an absolute path if it appears necessary.
- # Normally it is relative to the build directory. However, during
- # testing, for example, we might be running a non-installed python
- # from a different directory.
- if _PYTHON_BUILD and os.name == "posix":
- base = _PROJECT_BASE
- try:
- cwd = os.getcwd()
- except OSError:
- cwd = None
- if (not os.path.isabs(_CONFIG_VARS['srcdir']) and
- base != cwd):
- # srcdir is relative and we are not in the same directory
- # as the executable. Assume executable is in the build
- # directory and make srcdir absolute.
- srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
- _CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
- if sys.platform == 'darwin':
- kernel_version = os.uname()[2] # Kernel version (8.4.3)
- major_version = int(kernel_version.split('.')[0])
- if major_version < 8:
- # On Mac OS X before 10.4, check if -arch and -isysroot
- # are in CFLAGS or LDFLAGS and remove them if they are.
- # This is needed when building extensions on a 10.3 system
- # using a universal build of python.
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
- flags = _CONFIG_VARS[key]
- flags = re.sub('-arch\s+\w+\s', ' ', flags)
- flags = re.sub('-isysroot [^ \t]*', ' ', flags)
- _CONFIG_VARS[key] = flags
- else:
- # Allow the user to override the architecture flags using
- # an environment variable.
- # NOTE: This name was introduced by Apple in OSX 10.5 and
- # is used by several scripting languages distributed with
- # that OS release.
- if 'ARCHFLAGS' in os.environ:
- arch = os.environ['ARCHFLAGS']
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
- if key in _CONFIG_VARS:
- flags = _CONFIG_VARS[key]
- flags = re.sub('-arch\s+\w+\s', ' ', flags)
- flags = flags + ' ' + arch
- _CONFIG_VARS[key] = flags
- # If we're on OSX 10.5 or later and the user tries to
- # compiles an extension using an SDK that is not present
- # on the current machine it is better to not use an SDK
- # than to fail.
- #
- # The major usecase for this is users using a Python.org
- # binary installer on OSX 10.6: that installer uses
- # the 10.4u SDK, but that SDK is not installed by default
- # when you install Xcode.
- #
- CFLAGS = _CONFIG_VARS.get('CFLAGS', '')
- m = re.search('-isysroot\s+(\S+)', CFLAGS)
- if m is not None:
- sdk = m.group(1)
- if not os.path.exists(sdk):
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
- flags = _CONFIG_VARS[key]
- flags = re.sub('-isysroot\s+\S+(\s|$)', ' ', flags)
- _CONFIG_VARS[key] = flags
- if args:
- vals = []
- for name in args:
- vals.append(_CONFIG_VARS.get(name))
- return vals
- else:
- return _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)
- """
- return get_config_vars().get(name)
- def get_platform():
- """Return a string that identifies the current platform.
- This is used mainly to distinguish platform-specific build directories and
- platform-specific built distributions. Typically includes the OS name
- and version and the architecture (as supplied by 'os.uname()'),
- although the exact information included depends on the OS; eg. for IRIX
- the architecture isn't particularly important (IRIX only runs on SGI
- hardware), but for Linux the kernel version isn't particularly
- important.
- Examples of returned values:
- linux-i586
- linux-alpha (?)
- solaris-2.6-sun4u
- irix-5.3
- irix64-6.2
- Windows will return one of:
- win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
- win-ia64 (64bit Windows on Itanium)
- win32 (all others - specifically, sys.platform is returned)
- For other non-POSIX platforms, currently just returns 'sys.platform'.
- """
- import re
- if os.name == 'nt':
- # sniff sys.version for architecture.
- prefix = " bit ("
- i = sys.version.find(prefix)
- if i == -1:
- return sys.platform
- j = sys.version.find(")", i)
- look = sys.version[i+len(prefix):j].lower()
- if look == 'amd64':
- return 'win-amd64'
- if look == 'itanium':
- return 'win-ia64'
- return sys.platform
- if os.name != "posix" or not hasattr(os, 'uname'):
- # XXX what about the architecture? NT is Intel or Alpha,
- # Mac OS is M68k or PPC, etc.
- return sys.platform
- # Try to distinguish various flavours of Unix
- osname, host, release, version, machine = os.uname()
- # Convert the OS name to lowercase, remove '/' characters
- # (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
- osname = osname.lower().replace('/', '')
- machine = machine.replace(' ', '_')
- machine = machine.replace('/', '-')
- if osname[:5] == "linux":
- # At least on Linux/Intel, 'machine' is the processor --
- # i386, etc.
- # XXX what about Alpha, SPARC, etc?
- return "%s-%s" % (osname, machine)
- elif osname[:5] == "sunos":
- if release[0] >= "5": # SunOS 5 == Solaris 2
- osname = "solaris"
- release = "%d.%s" % (int(release[0]) - 3, release[2:])
- # We can't use "platform.architecture()[0]" because a
- # bootstrap problem. We use a dict to get an error
- # if some suspicious happens.
- bitness = {2147483647:"32bit", 9223372036854775807:"64bit"}
- machine += ".%s" % bitness[sys.maxint]
- # fall through to standard osname-release-machine representation
- elif osname[:4] == "irix": # could be "irix64"!
- return "%s-%s" % (osname, release)
- elif osname[:3] == "aix":
- return "%s-%s.%s" % (osname, version, release)
- elif osname[:6] == "cygwin":
- osname = "cygwin"
- rel_re = re.compile (r'[\d.]+')
- m = rel_re.match(release)
- if m:
- release = m.group()
- elif osname[:6] == "darwin":
- #
- # For our purposes, we'll assume that the system version from
- # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
- # to. This makes the compatibility story a bit more sane because the
- # machine is going to compile and link as if it were
- # MACOSX_DEPLOYMENT_TARGET.
- cfgvars = get_config_vars()
- macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
- if 1:
- # Always calculate the release of the running machine,
- # needed to determine if we can build fat binaries or not.
- macrelease = macver
- # Get the system version. Reading this plist is a documented
- # way to get the system version (see the documentation for
- # the Gestalt Manager)
- try:
- f = open('/System/Library/CoreServices/SystemVersion.plist')
- except IOError:
- # We're on a plain darwin box, fall back to the default
- # behaviour.
- pass
- else:
- try:
- m = re.search(
- r'<key>ProductUserVisibleVersion</key>\s*' +
- r'<string>(.*?)</string>', f.read())
- if m is not None:
- macrelease = '.'.join(m.group(1).split('.')[:2])
- # else: fall back to the default behaviour
- finally:
- f.close()
- if not macver:
- macver = macrelease
- if macver:
- release = macver
- osname = "macosx"
- if (macrelease + '.') >= '10.4.' and \
- '-arch' in get_config_vars().get('CFLAGS', '').strip():
- # The universal build will build fat binaries, but not on
- # systems before 10.4
- #
- # Try to detect 4-way universal builds, those have machine-type
- # 'universal' instead of 'fat'.
- machine = 'fat'
- cflags = get_config_vars().get('CFLAGS')
- archs = re.findall('-arch\s+(\S+)', cflags)
- archs = tuple(sorted(set(archs)))
- if len(archs) == 1:
- machine = archs[0]
- elif archs == ('i386', 'ppc'):
- machine = 'fat'
- elif archs == ('i386', 'x86_64'):
- machine = 'intel'
- elif archs == ('i386', 'ppc', 'x86_64'):
- machine = 'fat3'
- elif archs == ('ppc64', 'x86_64'):
- machine = 'fat64'
- elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
- machine = 'universal'
- else:
- raise ValueError(
- "Don't know machine value for archs=%r"%(archs,))
- elif machine == 'i386':
- # On OSX the machine type returned by uname is always the
- # 32-bit variant, even if the executable architecture is
- # the 64-bit variant
- if sys.maxint >= 2**32:
- machine = 'x86_64'
- elif machine in ('PowerPC', 'Power_Macintosh'):
- # Pick a sane name for the PPC architecture.
- # See 'i386' case
- if sys.maxint >= 2**32:
- machine = 'ppc64'
- else:
- machine = 'ppc'
- return "%s-%s-%s" % (osname, release, machine)
- def get_python_version():
- return _PY_VERSION_SHORT