| """Provide access to Python's configuration information. The specific |
| configuration variables available depend heavily on the platform and |
| configuration. The values may be retrieved using |
| get_config_var(name), and the list of variables is available via |
| get_config_vars().keys(). Additional convenience functions are also |
| available. |
| |
| Written by: Fred L. Drake, Jr. |
| Email: <fdrake@acm.org> |
| """ |
| |
| __revision__ = "$Id$" |
| |
| import os |
| import re |
| import string |
| import sys |
| |
| from distutils.errors import DistutilsPlatformError |
| |
| # These are needed in a couple of spots, so just compute them once. |
| PREFIX = os.path.normpath(sys.prefix) |
| EXEC_PREFIX = os.path.normpath(sys.exec_prefix) |
| |
| # Path to the base directory of the project. On Windows the binary may |
| # live in project/PCBuild9. If we're dealing with an x64 Windows build, |
| # it'll live in project/PCbuild/amd64. |
| project_base = os.path.dirname(os.path.abspath(sys.executable)) |
| if os.name == "nt" and "pcbuild" in project_base[-8:].lower(): |
| project_base = os.path.abspath(os.path.join(project_base, os.path.pardir)) |
| # PC/VS7.1 |
| if os.name == "nt" and "\\pc\\v" in project_base[-10:].lower(): |
| project_base = os.path.abspath(os.path.join(project_base, os.path.pardir, |
| os.path.pardir)) |
| # PC/AMD64 |
| if os.name == "nt" and "\\pcbuild\\amd64" in project_base[-14:].lower(): |
| project_base = os.path.abspath(os.path.join(project_base, os.path.pardir, |
| os.path.pardir)) |
| |
| # set for cross builds |
| if "_PYTHON_PROJECT_BASE" in os.environ: |
| # this is the build directory, at least for posix |
| project_base = os.path.normpath(os.environ["_PYTHON_PROJECT_BASE"]) |
| |
| # python_build: (Boolean) if true, we're either building Python or |
| # building an extension with an un-installed Python, so we use |
| # different (hard-wired) directories. |
| # Setup.local is available for Makefile builds including VPATH builds, |
| # Setup.dist is available on Windows |
| def _python_build(): |
| for fn in ("Setup.dist", "Setup.local"): |
| if os.path.isfile(os.path.join(project_base, "Modules", fn)): |
| return True |
| return False |
| python_build = _python_build() |
| |
| |
| def get_python_version(): |
| """Return a string containing the major and minor Python version, |
| leaving off the patchlevel. Sample return values could be '1.5' |
| or '2.2'. |
| """ |
| return sys.version[:3] |
| |
| |
| def get_python_inc(plat_specific=0, prefix=None): |
| """Return the directory containing installed Python header files. |
| |
| If 'plat_specific' is false (the default), this is the path to the |
| non-platform-specific header files, i.e. Python.h and so on; |
| otherwise, this is the path to platform-specific header files |
| (namely pyconfig.h). |
| |
| If 'prefix' is supplied, use it instead of sys.prefix or |
| sys.exec_prefix -- i.e., ignore 'plat_specific'. |
| """ |
| if prefix is None: |
| prefix = plat_specific and EXEC_PREFIX or PREFIX |
| |
| if os.name == "posix": |
| if python_build: |
| buildir = os.path.dirname(sys.executable) |
| if plat_specific: |
| # python.h is located in the buildir |
| inc_dir = buildir |
| else: |
| # the source dir is relative to the buildir |
| srcdir = os.path.abspath(os.path.join(buildir, |
| get_config_var('srcdir'))) |
| # Include is located in the srcdir |
| inc_dir = os.path.join(srcdir, "Include") |
| return inc_dir |
| return os.path.join(prefix, "include", "python" + get_python_version()) |
| elif os.name == "nt": |
| return os.path.join(prefix, "include") |
| elif os.name == "os2": |
| return os.path.join(prefix, "Include") |
| else: |
| raise DistutilsPlatformError( |
| "I don't know where Python installs its C header files " |
| "on platform '%s'" % os.name) |
| |
| |
| def get_python_lib(plat_specific=0, standard_lib=0, prefix=None): |
| """Return the directory containing the Python library (standard or |
| site additions). |
| |
| If 'plat_specific' is true, return the directory containing |
| platform-specific modules, i.e. any module from a non-pure-Python |
| module distribution; otherwise, return the platform-shared library |
| directory. If 'standard_lib' is true, return the directory |
| containing standard Python library modules; otherwise, return the |
| directory for site-specific modules. |
| |
| If 'prefix' is supplied, use it instead of sys.prefix or |
| sys.exec_prefix -- i.e., ignore 'plat_specific'. |
| """ |
| if prefix is None: |
| prefix = plat_specific and EXEC_PREFIX or PREFIX |
| |
| if os.name == "posix": |
| libpython = os.path.join(prefix, |
| "lib", "python" + get_python_version()) |
| if standard_lib: |
| return libpython |
| else: |
| return os.path.join(libpython, "site-packages") |
| |
| elif os.name == "nt": |
| if standard_lib: |
| return os.path.join(prefix, "Lib") |
| else: |
| if get_python_version() < "2.2": |
| return prefix |
| else: |
| return os.path.join(prefix, "Lib", "site-packages") |
| |
| elif os.name == "os2": |
| if standard_lib: |
| return os.path.join(prefix, "Lib") |
| else: |
| return os.path.join(prefix, "Lib", "site-packages") |
| |
| else: |
| raise DistutilsPlatformError( |
| "I don't know where Python installs its library " |
| "on platform '%s'" % os.name) |
| |
| |
| |
| def customize_compiler(compiler): |
| """Do any platform-specific customization of a CCompiler instance. |
| |
| Mainly needed on Unix, so we can plug in the information that |
| varies across Unices and is stored in Python's Makefile. |
| """ |
| if compiler.compiler_type == "unix": |
| if sys.platform == "darwin": |
| # Perform first-time customization of compiler-related |
| # config vars on OS X now that we know we need a compiler. |
| # This is primarily to support Pythons from binary |
| # installers. The kind and paths to build tools on |
| # the user system may vary significantly from the system |
| # that Python itself was built on. Also the user OS |
| # version and build tools may not support the same set |
| # of CPU architectures for universal builds. |
| global _config_vars |
| # Use get_config_var() to ensure _config_vars is initialized. |
| if not get_config_var('CUSTOMIZED_OSX_COMPILER'): |
| import _osx_support |
| _osx_support.customize_compiler(_config_vars) |
| _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True' |
| |
| (cc, cxx, opt, cflags, ccshared, ldshared, so_ext, ar, ar_flags) = \ |
| get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS', |
| 'CCSHARED', 'LDSHARED', 'SO', 'AR', |
| 'ARFLAGS') |
| |
| if 'CC' in os.environ: |
| newcc = os.environ['CC'] |
| if (sys.platform == 'darwin' |
| and 'LDSHARED' not in os.environ |
| and ldshared.startswith(cc)): |
| # On OS X, if CC is overridden, use that as the default |
| # command for LDSHARED as well |
| ldshared = newcc + ldshared[len(cc):] |
| cc = newcc |
| if 'CXX' in os.environ: |
| cxx = os.environ['CXX'] |
| if 'LDSHARED' in os.environ: |
| ldshared = os.environ['LDSHARED'] |
| if 'CPP' in os.environ: |
| cpp = os.environ['CPP'] |
| else: |
| cpp = cc + " -E" # not always |
| if 'LDFLAGS' in os.environ: |
| ldshared = ldshared + ' ' + os.environ['LDFLAGS'] |
| if 'CFLAGS' in os.environ: |
| cflags = opt + ' ' + os.environ['CFLAGS'] |
| ldshared = ldshared + ' ' + os.environ['CFLAGS'] |
| if 'CPPFLAGS' in os.environ: |
| cpp = cpp + ' ' + os.environ['CPPFLAGS'] |
| cflags = cflags + ' ' + os.environ['CPPFLAGS'] |
| ldshared = ldshared + ' ' + os.environ['CPPFLAGS'] |
| if 'AR' in os.environ: |
| ar = os.environ['AR'] |
| if 'ARFLAGS' in os.environ: |
| archiver = ar + ' ' + os.environ['ARFLAGS'] |
| else: |
| archiver = ar + ' ' + ar_flags |
| |
| cc_cmd = cc + ' ' + cflags |
| compiler.set_executables( |
| preprocessor=cpp, |
| compiler=cc_cmd, |
| compiler_so=cc_cmd + ' ' + ccshared, |
| compiler_cxx=cxx, |
| linker_so=ldshared, |
| linker_exe=cc, |
| archiver=archiver) |
| |
| compiler.shared_lib_extension = so_ext |
| |
| |
| def get_config_h_filename(): |
| """Return full pathname of installed pyconfig.h file.""" |
| if python_build: |
| if os.name == "nt": |
| inc_dir = os.path.join(project_base, "PC") |
| else: |
| inc_dir = project_base |
| else: |
| inc_dir = get_python_inc(plat_specific=1) |
| if get_python_version() < '2.2': |
| config_h = 'config.h' |
| else: |
| # The name of the config.h file changed in 2.2 |
| config_h = 'pyconfig.h' |
| return os.path.join(inc_dir, config_h) |
| |
| |
| def get_makefile_filename(): |
| """Return full pathname of installed Makefile from the Python build.""" |
| if python_build: |
| return os.path.join(project_base, "Makefile") |
| lib_dir = get_python_lib(plat_specific=1, standard_lib=1) |
| return os.path.join(lib_dir, "config", "Makefile") |
| |
| |
| def parse_config_h(fp, g=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. |
| """ |
| if g is None: |
| g = {} |
| 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 1: |
| 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 |
| g[n] = v |
| else: |
| m = undef_rx.match(line) |
| if m: |
| g[m.group(1)] = 0 |
| return g |
| |
| |
| # Regexes needed for parsing Makefile (and similar syntaxes, |
| # like old-style Setup files). |
| _variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)") |
| _findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)") |
| _findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}") |
| |
| def parse_makefile(fn, g=None): |
| """Parse a Makefile-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. |
| """ |
| from distutils.text_file import TextFile |
| fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1) |
| |
| if g is None: |
| g = {} |
| done = {} |
| notdone = {} |
| |
| while 1: |
| line = fp.readline() |
| if line is None: # eof |
| break |
| m = _variable_rx.match(line) |
| if m: |
| n, v = m.group(1, 2) |
| v = v.strip() |
| # `$$' is a literal `$' in make |
| tmpv = v.replace('$$', '') |
| |
| if "$" in tmpv: |
| notdone[n] = v |
| else: |
| try: |
| v = int(v) |
| except ValueError: |
| # insert literal `$' |
| done[n] = v.replace('$$', '$') |
| else: |
| done[n] = v |
| |
| # do variable interpolation here |
| while notdone: |
| for name in notdone.keys(): |
| value = notdone[name] |
| m = _findvar1_rx.search(value) or _findvar2_rx.search(value) |
| if m: |
| n = m.group(1) |
| found = True |
| if n in done: |
| item = str(done[n]) |
| elif n in notdone: |
| # get it on a subsequent round |
| found = False |
| elif n in os.environ: |
| # do it like make: fall back to environment |
| item = os.environ[n] |
| else: |
| done[n] = item = "" |
| if found: |
| after = value[m.end():] |
| value = value[:m.start()] + item + after |
| if "$" in after: |
| notdone[name] = value |
| else: |
| try: value = int(value) |
| except ValueError: |
| done[name] = value.strip() |
| else: |
| done[name] = value |
| del notdone[name] |
| else: |
| # bogus variable reference; just drop it since we can't deal |
| del notdone[name] |
| |
| fp.close() |
| |
| # strip spurious spaces |
| for k, v in done.items(): |
| if isinstance(v, str): |
| done[k] = v.strip() |
| |
| # save the results in the global dictionary |
| g.update(done) |
| return g |
| |
| |
| def expand_makefile_vars(s, vars): |
| """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in |
| 'string' according to 'vars' (a dictionary mapping variable names to |
| values). Variables not present in 'vars' are silently expanded to the |
| empty string. The variable values in 'vars' should not contain further |
| variable expansions; if 'vars' is the output of 'parse_makefile()', |
| you're fine. Returns a variable-expanded version of 's'. |
| """ |
| |
| # This algorithm does multiple expansion, so if vars['foo'] contains |
| # "${bar}", it will expand ${foo} to ${bar}, and then expand |
| # ${bar}... and so forth. This is fine as long as 'vars' comes from |
| # 'parse_makefile()', which takes care of such expansions eagerly, |
| # according to make's variable expansion semantics. |
| |
| while 1: |
| m = _findvar1_rx.search(s) or _findvar2_rx.search(s) |
| if m: |
| (beg, end) = m.span() |
| s = s[0:beg] + vars.get(m.group(1)) + s[end:] |
| else: |
| break |
| return s |
| |
| |
| _config_vars = None |
| |
| def _init_posix(): |
| """Initialize the module as appropriate for POSIX systems.""" |
| # _sysconfigdata is generated at build time, see the sysconfig module |
| from _sysconfigdata import build_time_vars |
| global _config_vars |
| _config_vars = {} |
| _config_vars.update(build_time_vars) |
| |
| |
| def _init_nt(): |
| """Initialize the module as appropriate for NT""" |
| g = {} |
| # set basic install directories |
| g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1) |
| g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1) |
| |
| # XXX hmmm.. a normal install puts include files here |
| g['INCLUDEPY'] = get_python_inc(plat_specific=0) |
| |
| g['SO'] = '.pyd' |
| g['EXE'] = ".exe" |
| g['VERSION'] = get_python_version().replace(".", "") |
| g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable)) |
| |
| global _config_vars |
| _config_vars = g |
| |
| |
| def _init_os2(): |
| """Initialize the module as appropriate for OS/2""" |
| g = {} |
| # set basic install directories |
| g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1) |
| g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1) |
| |
| # XXX hmmm.. a normal install puts include files here |
| g['INCLUDEPY'] = get_python_inc(plat_specific=0) |
| |
| g['SO'] = '.pyd' |
| g['EXE'] = ".exe" |
| |
| global _config_vars |
| _config_vars = g |
| |
| |
| def get_config_vars(*args): |
| """With no arguments, return a dictionary of all configuration |
| variables relevant for the current platform. Generally this includes |
| everything needed to build extensions and install both pure modules and |
| extensions. On Unix, this means every variable defined in Python's |
| installed Makefile; on Windows 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. |
| """ |
| global _config_vars |
| if _config_vars is None: |
| func = globals().get("_init_" + os.name) |
| if func: |
| func() |
| else: |
| _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 |
| |
| # OS X platforms require special customization to handle |
| # multi-architecture, multi-os-version installers |
| if sys.platform == 'darwin': |
| import _osx_support |
| _osx_support.customize_config_vars(_config_vars) |
| |
| 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) |
