| 1 | """Provide access to Python's configuration information. The specific
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| 2 | configuration variables available depend heavily on the platform and
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| 3 | configuration. The values may be retrieved using
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| 4 | get_config_var(name), and the list of variables is available via
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| 5 | get_config_vars().keys(). Additional convenience functions are also
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| 6 | available.
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| 7 |
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| 8 | Written by: Fred L. Drake, Jr.
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| 9 | Email: <fdrake@acm.org>
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| 10 | """
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| 11 |
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| 12 | __revision__ = "$Id$"
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| 13 |
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| 14 | import os
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| 15 | import re
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| 16 | import string
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| 17 | import sys
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| 18 |
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| 19 | from distutils.errors import DistutilsPlatformError
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| 20 |
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| 21 | # These are needed in a couple of spots, so just compute them once.
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| 22 | PREFIX = os.path.normpath(sys.prefix)
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| 23 | EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
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| 24 |
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| 25 | # Path to the base directory of the project. On Windows the binary may
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| 26 | # live in project/PCBuild9. If we're dealing with an x64 Windows build,
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| 27 | # it'll live in project/PCbuild/amd64.
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| 28 | project_base = os.path.dirname(os.path.abspath(sys.executable))
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| 29 | if os.name == "nt" and "pcbuild" in project_base[-8:].lower():
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| 30 | project_base = os.path.abspath(os.path.join(project_base, os.path.pardir))
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| 31 | # PC/VS7.1
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| 32 | if os.name == "nt" and "\\pc\\v" in project_base[-10:].lower():
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| 33 | project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
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| 34 | os.path.pardir))
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| 35 | # PC/AMD64
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| 36 | if os.name == "nt" and "\\pcbuild\\amd64" in project_base[-14:].lower():
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| 37 | project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
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| 38 | os.path.pardir))
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| 39 |
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| 40 | # set for cross builds
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| 41 | if "_PYTHON_PROJECT_BASE" in os.environ:
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| 42 | # this is the build directory, at least for posix
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| 43 | project_base = os.path.normpath(os.environ["_PYTHON_PROJECT_BASE"])
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| 44 |
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| 45 | # python_build: (Boolean) if true, we're either building Python or
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| 46 | # building an extension with an un-installed Python, so we use
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| 47 | # different (hard-wired) directories.
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| 48 | # Setup.local is available for Makefile builds including VPATH builds,
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| 49 | # Setup.dist is available on Windows
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| 50 | def _python_build():
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| 51 | for fn in ("Setup.dist", "Setup.local"):
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| 52 | if os.path.isfile(os.path.join(project_base, "Modules", fn)):
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| 53 | return True
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| 54 | return False
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| 55 | python_build = _python_build()
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| 56 |
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| 57 |
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| 58 | def get_python_version():
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| 59 | """Return a string containing the major and minor Python version,
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| 60 | leaving off the patchlevel. Sample return values could be '1.5'
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| 61 | or '2.2'.
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| 62 | """
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| 63 | return sys.version[:3]
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| 64 |
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| 65 |
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| 66 | def get_python_inc(plat_specific=0, prefix=None):
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| 67 | """Return the directory containing installed Python header files.
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| 68 |
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| 69 | If 'plat_specific' is false (the default), this is the path to the
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| 70 | non-platform-specific header files, i.e. Python.h and so on;
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| 71 | otherwise, this is the path to platform-specific header files
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| 72 | (namely pyconfig.h).
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| 73 |
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| 74 | If 'prefix' is supplied, use it instead of sys.prefix or
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| 75 | sys.exec_prefix -- i.e., ignore 'plat_specific'.
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| 76 | """
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| 77 | if prefix is None:
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| 78 | prefix = plat_specific and EXEC_PREFIX or PREFIX
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| 79 |
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| 80 | if os.name == "posix":
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| 81 | if python_build:
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| 82 | buildir = os.path.dirname(sys.executable)
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| 83 | if plat_specific:
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| 84 | # python.h is located in the buildir
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| 85 | inc_dir = buildir
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| 86 | else:
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| 87 | # the source dir is relative to the buildir
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| 88 | srcdir = os.path.abspath(os.path.join(buildir,
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| 89 | get_config_var('srcdir')))
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| 90 | # Include is located in the srcdir
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| 91 | inc_dir = os.path.join(srcdir, "Include")
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| 92 | return inc_dir
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| 93 | return os.path.join(prefix, "include", "python" + get_python_version())
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| 94 | elif os.name == "nt":
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| 95 | return os.path.join(prefix, "include")
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| 96 | elif os.name == "os2":
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| 97 | return os.path.join(prefix, "Include")
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| 98 | else:
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| 99 | raise DistutilsPlatformError(
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| 100 | "I don't know where Python installs its C header files "
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| 101 | "on platform '%s'" % os.name)
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| 102 |
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| 103 |
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| 104 | def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
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| 105 | """Return the directory containing the Python library (standard or
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| 106 | site additions).
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| 107 |
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| 108 | If 'plat_specific' is true, return the directory containing
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| 109 | platform-specific modules, i.e. any module from a non-pure-Python
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| 110 | module distribution; otherwise, return the platform-shared library
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| 111 | directory. If 'standard_lib' is true, return the directory
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| 112 | containing standard Python library modules; otherwise, return the
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| 113 | directory for site-specific modules.
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| 114 |
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| 115 | If 'prefix' is supplied, use it instead of sys.prefix or
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| 116 | sys.exec_prefix -- i.e., ignore 'plat_specific'.
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| 117 | """
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| 118 | if prefix is None:
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| 119 | prefix = plat_specific and EXEC_PREFIX or PREFIX
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| 120 |
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| 121 | if os.name == "posix":
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| 122 | libpython = os.path.join(prefix,
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| 123 | "lib", "python" + get_python_version())
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| 124 | if standard_lib:
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| 125 | return libpython
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| 126 | else:
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| 127 | return os.path.join(libpython, "site-packages")
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| 128 |
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| 129 | elif os.name == "nt":
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| 130 | if standard_lib:
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| 131 | return os.path.join(prefix, "Lib")
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| 132 | else:
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| 133 | if get_python_version() < "2.2":
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| 134 | return prefix
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| 135 | else:
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| 136 | return os.path.join(prefix, "Lib", "site-packages")
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| 137 |
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| 138 | elif os.name == "os2":
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| 139 | if standard_lib:
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| 140 | return os.path.join(prefix, "Lib")
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| 141 | else:
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| 142 | return os.path.join(prefix, "Lib", "site-packages")
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| 143 |
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| 144 | else:
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| 145 | raise DistutilsPlatformError(
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| 146 | "I don't know where Python installs its library "
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| 147 | "on platform '%s'" % os.name)
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| 148 |
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| 149 |
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| 150 |
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| 151 | def customize_compiler(compiler):
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| 152 | """Do any platform-specific customization of a CCompiler instance.
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| 153 |
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| 154 | Mainly needed on Unix, so we can plug in the information that
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| 155 | varies across Unices and is stored in Python's Makefile.
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| 156 | """
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| 157 | if compiler.compiler_type == "unix":
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| 158 | if sys.platform == "darwin":
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| 159 | # Perform first-time customization of compiler-related
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| 160 | # config vars on OS X now that we know we need a compiler.
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| 161 | # This is primarily to support Pythons from binary
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| 162 | # installers. The kind and paths to build tools on
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| 163 | # the user system may vary significantly from the system
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| 164 | # that Python itself was built on. Also the user OS
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| 165 | # version and build tools may not support the same set
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| 166 | # of CPU architectures for universal builds.
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| 167 | global _config_vars
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| 168 | if not _config_vars.get('CUSTOMIZED_OSX_COMPILER', ''):
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| 169 | import _osx_support
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| 170 | _osx_support.customize_compiler(_config_vars)
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| 171 | _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
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| 172 |
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| 173 | (cc, cxx, opt, cflags, ccshared, ldshared, so_ext, ar, ar_flags) = \
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| 174 | get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS',
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| 175 | 'CCSHARED', 'LDSHARED', 'SO', 'AR',
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| 176 | 'ARFLAGS')
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| 177 |
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| 178 | if 'CC' in os.environ:
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| 179 | newcc = os.environ['CC']
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| 180 | if (sys.platform == 'darwin'
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| 181 | and 'LDSHARED' not in os.environ
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| 182 | and ldshared.startswith(cc)):
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| 183 | # On OS X, if CC is overridden, use that as the default
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| 184 | # command for LDSHARED as well
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| 185 | ldshared = newcc + ldshared[len(cc):]
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| 186 | cc = newcc
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| 187 | if 'CXX' in os.environ:
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| 188 | cxx = os.environ['CXX']
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| 189 | if 'LDSHARED' in os.environ:
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| 190 | ldshared = os.environ['LDSHARED']
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| 191 | if 'CPP' in os.environ:
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| 192 | cpp = os.environ['CPP']
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| 193 | else:
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| 194 | cpp = cc + " -E" # not always
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| 195 | if 'LDFLAGS' in os.environ:
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| 196 | ldshared = ldshared + ' ' + os.environ['LDFLAGS']
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| 197 | if 'CFLAGS' in os.environ:
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| 198 | cflags = opt + ' ' + os.environ['CFLAGS']
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| 199 | ldshared = ldshared + ' ' + os.environ['CFLAGS']
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| 200 | if 'CPPFLAGS' in os.environ:
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| 201 | cpp = cpp + ' ' + os.environ['CPPFLAGS']
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| 202 | cflags = cflags + ' ' + os.environ['CPPFLAGS']
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| 203 | ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
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| 204 | if 'AR' in os.environ:
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| 205 | ar = os.environ['AR']
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| 206 | if 'ARFLAGS' in os.environ:
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| 207 | archiver = ar + ' ' + os.environ['ARFLAGS']
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| 208 | else:
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| 209 | archiver = ar + ' ' + ar_flags
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| 210 |
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| 211 | cc_cmd = cc + ' ' + cflags
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| 212 | compiler.set_executables(
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| 213 | preprocessor=cpp,
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| 214 | compiler=cc_cmd,
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| 215 | compiler_so=cc_cmd + ' ' + ccshared,
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| 216 | compiler_cxx=cxx,
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| 217 | linker_so=ldshared,
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| 218 | linker_exe=cc,
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| 219 | archiver=archiver)
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| 220 |
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| 221 | compiler.shared_lib_extension = so_ext
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| 222 |
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| 223 |
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| 224 | def get_config_h_filename():
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| 225 | """Return full pathname of installed pyconfig.h file."""
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| 226 | if python_build:
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| 227 | if os.name == "nt":
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| 228 | inc_dir = os.path.join(project_base, "PC")
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| 229 | else:
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| 230 | inc_dir = project_base
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| 231 | else:
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| 232 | inc_dir = get_python_inc(plat_specific=1)
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| 233 | if get_python_version() < '2.2':
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| 234 | config_h = 'config.h'
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| 235 | else:
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| 236 | # The name of the config.h file changed in 2.2
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| 237 | config_h = 'pyconfig.h'
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| 238 | return os.path.join(inc_dir, config_h)
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| 239 |
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| 240 |
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| 241 | def get_makefile_filename():
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| 242 | """Return full pathname of installed Makefile from the Python build."""
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| 243 | if python_build:
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| 244 | return os.path.join(project_base, "Makefile")
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| 245 | lib_dir = get_python_lib(plat_specific=1, standard_lib=1)
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| 246 | return os.path.join(lib_dir, "config", "Makefile")
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| 247 |
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| 248 |
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| 249 | def parse_config_h(fp, g=None):
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| 250 | """Parse a config.h-style file.
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| 251 |
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| 252 | A dictionary containing name/value pairs is returned. If an
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| 253 | optional dictionary is passed in as the second argument, it is
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| 254 | used instead of a new dictionary.
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| 255 | """
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| 256 | if g is None:
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| 257 | g = {}
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| 258 | define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
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| 259 | undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
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| 260 | #
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| 261 | while 1:
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| 262 | line = fp.readline()
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| 263 | if not line:
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| 264 | break
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| 265 | m = define_rx.match(line)
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| 266 | if m:
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| 267 | n, v = m.group(1, 2)
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| 268 | try: v = int(v)
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| 269 | except ValueError: pass
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| 270 | g[n] = v
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| 271 | else:
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| 272 | m = undef_rx.match(line)
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| 273 | if m:
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| 274 | g[m.group(1)] = 0
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| 275 | return g
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| 276 |
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| 277 |
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| 278 | # Regexes needed for parsing Makefile (and similar syntaxes,
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| 279 | # like old-style Setup files).
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| 280 | _variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
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| 281 | _findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
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| 282 | _findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
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| 283 |
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| 284 | def parse_makefile(fn, g=None):
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| 285 | """Parse a Makefile-style file.
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| 286 |
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| 287 | A dictionary containing name/value pairs is returned. If an
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| 288 | optional dictionary is passed in as the second argument, it is
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| 289 | used instead of a new dictionary.
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| 290 | """
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| 291 | from distutils.text_file import TextFile
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| 292 | fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1)
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| 293 |
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| 294 | if g is None:
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| 295 | g = {}
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| 296 | done = {}
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| 297 | notdone = {}
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| 298 |
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| 299 | while 1:
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| 300 | line = fp.readline()
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| 301 | if line is None: # eof
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| 302 | break
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| 303 | m = _variable_rx.match(line)
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| 304 | if m:
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| 305 | n, v = m.group(1, 2)
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| 306 | v = v.strip()
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| 307 | # `$$' is a literal `$' in make
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| 308 | tmpv = v.replace('$$', '')
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| 309 |
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| 310 | if "$" in tmpv:
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| 311 | notdone[n] = v
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| 312 | else:
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| 313 | try:
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| 314 | v = int(v)
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| 315 | except ValueError:
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| 316 | # insert literal `$'
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| 317 | done[n] = v.replace('$$', '$')
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| 318 | else:
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| 319 | done[n] = v
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| 320 |
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| 321 | # do variable interpolation here
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| 322 | while notdone:
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| 323 | for name in notdone.keys():
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| 324 | value = notdone[name]
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| 325 | m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
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| 326 | if m:
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| 327 | n = m.group(1)
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| 328 | found = True
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| 329 | if n in done:
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| 330 | item = str(done[n])
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| 331 | elif n in notdone:
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| 332 | # get it on a subsequent round
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| 333 | found = False
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| 334 | elif n in os.environ:
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| 335 | # do it like make: fall back to environment
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| 336 | item = os.environ[n]
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| 337 | else:
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| 338 | done[n] = item = ""
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| 339 | if found:
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| 340 | after = value[m.end():]
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| 341 | value = value[:m.start()] + item + after
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| 342 | if "$" in after:
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| 343 | notdone[name] = value
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| 344 | else:
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| 345 | try: value = int(value)
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| 346 | except ValueError:
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| 347 | done[name] = value.strip()
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| 348 | else:
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| 349 | done[name] = value
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| 350 | del notdone[name]
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| 351 | else:
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| 352 | # bogus variable reference; just drop it since we can't deal
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| 353 | del notdone[name]
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| 354 |
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| 355 | fp.close()
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| 356 |
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| 357 | # strip spurious spaces
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| 358 | for k, v in done.items():
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| 359 | if isinstance(v, str):
|
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| 360 | done[k] = v.strip()
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| 361 |
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| 362 | # save the results in the global dictionary
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| 363 | g.update(done)
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| 364 | return g
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| 365 |
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| 366 |
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| 367 | def expand_makefile_vars(s, vars):
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| 368 | """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in
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|---|
| 369 | 'string' according to 'vars' (a dictionary mapping variable names to
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|---|
| 370 | values). Variables not present in 'vars' are silently expanded to the
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| 371 | empty string. The variable values in 'vars' should not contain further
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|---|
| 372 | variable expansions; if 'vars' is the output of 'parse_makefile()',
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| 373 | you're fine. Returns a variable-expanded version of 's'.
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| 374 | """
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| 375 |
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| 376 | # This algorithm does multiple expansion, so if vars['foo'] contains
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| 377 | # "${bar}", it will expand ${foo} to ${bar}, and then expand
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|---|
| 378 | # ${bar}... and so forth. This is fine as long as 'vars' comes from
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|---|
| 379 | # 'parse_makefile()', which takes care of such expansions eagerly,
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|---|
| 380 | # according to make's variable expansion semantics.
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|---|
| 381 |
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|---|
| 382 | while 1:
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| 383 | m = _findvar1_rx.search(s) or _findvar2_rx.search(s)
|
|---|
| 384 | if m:
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|---|
| 385 | (beg, end) = m.span()
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|---|
| 386 | s = s[0:beg] + vars.get(m.group(1)) + s[end:]
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|---|
| 387 | else:
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| 388 | break
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| 389 | return s
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|---|
| 390 |
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| 391 |
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|---|
| 392 | _config_vars = None
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|---|
| 393 |
|
|---|
| 394 | def _init_posix():
|
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| 395 | """Initialize the module as appropriate for POSIX systems."""
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| 396 | # _sysconfigdata is generated at build time, see the sysconfig module
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| 397 | from _sysconfigdata import build_time_vars
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| 398 | global _config_vars
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| 399 | _config_vars = {}
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| 400 | _config_vars.update(build_time_vars)
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| 401 |
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| 402 |
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| 403 | def _init_nt():
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| 404 | """Initialize the module as appropriate for NT"""
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| 405 | g = {}
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| 406 | # set basic install directories
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| 407 | g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
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| 408 | g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
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| 409 |
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| 410 | # XXX hmmm.. a normal install puts include files here
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| 411 | g['INCLUDEPY'] = get_python_inc(plat_specific=0)
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| 412 |
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| 413 | g['SO'] = '.pyd'
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| 414 | g['EXE'] = ".exe"
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| 415 | g['VERSION'] = get_python_version().replace(".", "")
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| 416 | g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))
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| 417 |
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| 418 | global _config_vars
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| 419 | _config_vars = g
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| 420 |
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| 421 |
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| 422 | def _init_os2():
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| 423 | """Initialize the module as appropriate for OS/2"""
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| 424 | g = {}
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| 425 | # set basic install directories
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| 426 | g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
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| 427 | g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
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| 428 |
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| 429 | # XXX hmmm.. a normal install puts include files here
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| 430 | g['INCLUDEPY'] = get_python_inc(plat_specific=0)
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| 431 |
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| 432 | g['SO'] = '.pyd'
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| 433 | g['EXE'] = ".exe"
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| 434 |
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| 435 | global _config_vars
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| 436 | _config_vars = g
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| 437 |
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| 438 |
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| 439 | def get_config_vars(*args):
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| 440 | """With no arguments, return a dictionary of all configuration
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| 441 | variables relevant for the current platform. Generally this includes
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| 442 | everything needed to build extensions and install both pure modules and
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| 443 | extensions. On Unix, this means every variable defined in Python's
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| 444 | installed Makefile; on Windows and Mac OS it's a much smaller set.
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| 445 |
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| 446 | With arguments, return a list of values that result from looking up
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| 447 | each argument in the configuration variable dictionary.
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| 448 | """
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| 449 | global _config_vars
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| 450 | if _config_vars is None:
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| 451 | func = globals().get("_init_" + os.name)
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| 452 | if func:
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| 453 | func()
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| 454 | else:
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| 455 | _config_vars = {}
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| 456 |
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| 457 | # Normalized versions of prefix and exec_prefix are handy to have;
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| 458 | # in fact, these are the standard versions used most places in the
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| 459 | # Distutils.
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| 460 | _config_vars['prefix'] = PREFIX
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| 461 | _config_vars['exec_prefix'] = EXEC_PREFIX
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| 462 |
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| 463 | # OS X platforms require special customization to handle
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| 464 | # multi-architecture, multi-os-version installers
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| 465 | if sys.platform == 'darwin':
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| 466 | import _osx_support
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| 467 | _osx_support.customize_config_vars(_config_vars)
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| 468 |
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| 469 | if args:
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| 470 | vals = []
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| 471 | for name in args:
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| 472 | vals.append(_config_vars.get(name))
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| 473 | return vals
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| 474 | else:
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| 475 | return _config_vars
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| 476 |
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| 477 | def get_config_var(name):
|
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| 478 | """Return the value of a single variable using the dictionary
|
|---|
| 479 | returned by 'get_config_vars()'. Equivalent to
|
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| 480 | get_config_vars().get(name)
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| 481 | """
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| 482 | return get_config_vars().get(name)
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