mirror of https://github.com/python/cpython
267 lines
8.4 KiB
Python
267 lines
8.4 KiB
Python
"""Provide access to Python's configuration information. The specific names
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defined in the module depend heavily on the platform and configuration.
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Written by: Fred L. Drake, Jr.
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Email: <fdrake@acm.org>
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Initial date: 17-Dec-1998
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"""
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__version__ = "$Revision$"
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import os
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import re
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import string
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import sys
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from errors import DistutilsPlatformError
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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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def get_python_inc(plat_specific=0):
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"""Return the directory containing installed Python header files.
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If 'plat_specific' is false (the default), this is the path to the
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non-platform-specific header files, i.e. Python.h and so on;
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otherwise, this is the path to platform-specific header files
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(namely config.h).
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"""
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the_prefix = (plat_specific and exec_prefix or prefix)
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if os.name == "posix":
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return os.path.join(the_prefix, "include", "python" + sys.version[:3])
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elif os.name == "nt":
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return os.path.join(the_prefix, "Include") # include or Include?
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elif os.name == "mac":
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return os.path.join(the_prefix, "Include")
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else:
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raise DistutilsPlatformError, \
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("I don't know where Python installs its C header files " +
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"on platform '%s'") % os.name
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def get_python_lib(plat_specific=0, standard_lib=0):
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"""Return the directory containing the Python library (standard or
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site additions).
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If 'plat_specific' is true, return the directory containing
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platform-specific modules, i.e. any module from a non-pure-Python
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module distribution; otherwise, return the platform-shared library
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directory. If 'standard_lib' is true, return the directory
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containing standard Python library modules; otherwise, return the
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directory for site-specific modules.
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"""
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the_prefix = (plat_specific and exec_prefix or prefix)
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if os.name == "posix":
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libpython = os.path.join(the_prefix,
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"lib", "python" + sys.version[:3])
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if standard_lib:
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return libpython
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else:
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return os.path.join(libpython, "site-packages")
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elif os.name == "nt":
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if standard_lib:
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return os.path.join(the_prefix, "Lib")
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else:
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return the_prefix
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elif os.name == "mac":
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if platform_specific:
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if standard_lib:
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return os.path.join(exec_prefix, "Mac", "Plugins")
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else:
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raise DistutilsPlatformError, \
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"OK, where DO site-specific extensions go on the Mac?"
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else:
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if standard_lib:
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return os.path.join(prefix, "Lib")
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else:
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raise DistutilsPlatformError, \
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"OK, where DO site-specific modules go on the Mac?"
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else:
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raise DistutilsPlatformError, \
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("I don't know where Python installs its library " +
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"on platform '%s'") % os.name
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# get_python_lib()
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def get_config_h_filename():
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"""Return full pathname of installed config.h file."""
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inc_dir = get_python_inc(plat_specific=1)
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return os.path.join(inc_dir, "config.h")
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def get_makefile_filename():
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"""Return full pathname of installed Makefile from the Python build."""
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lib_dir = get_python_lib(plat_specific=1, standard_lib=1)
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return os.path.join(lib_dir, "config", "Makefile")
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def parse_config_h(fp, g=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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if g is None:
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g = {}
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define_rx = re.compile("#define ([A-Z][A-Z0-9_]+) (.*)\n")
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undef_rx = re.compile("/[*] #undef ([A-Z][A-Z0-9_]+) [*]/\n")
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#
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while 1:
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line = fp.readline()
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if not line:
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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 = string.atoi(v)
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except ValueError: pass
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g[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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g[m.group(1)] = 0
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return g
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def parse_makefile(fp, g=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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if g is None:
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g = {}
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variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)\n")
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done = {}
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notdone = {}
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#
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while 1:
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line = fp.readline()
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if not line:
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break
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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 = string.strip(v)
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if "$" in v:
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notdone[n] = v
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else:
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try: v = string.atoi(v)
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except ValueError: pass
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done[n] = v
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# do variable interpolation here
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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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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)
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if not m:
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m = findvar2_rx.search(value)
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if m:
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n = m.group(1)
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if done.has_key(n):
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after = value[m.end():]
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value = value[:m.start()] + done[n] + after
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if "$" in after:
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notdone[name] = value
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else:
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try: value = string.atoi(value)
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except ValueError: pass
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done[name] = string.strip(value)
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del notdone[name]
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elif notdone.has_key(n):
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# get it on a subsequent round
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pass
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else:
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done[n] = ""
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after = value[m.end():]
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value = value[:m.start()] + after
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if "$" in after:
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notdone[name] = value
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else:
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try: value = string.atoi(value)
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except ValueError: pass
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done[name] = string.strip(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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# save the results in the global dictionary
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g.update(done)
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return g
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def _init_posix():
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"""Initialize the module as appropriate for POSIX systems."""
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g = globals()
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# load the installed config.h:
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parse_config_h(open(get_config_h_filename()), g)
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# load the installed Makefile:
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parse_makefile(open(get_makefile_filename()), g)
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def _init_nt():
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"""Initialize the module as appropriate for NT"""
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g = globals()
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# load config.h, though I don't know how useful this is
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parse_config_h(open(get_config_h_filename()), g)
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# set basic install directories
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g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
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g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
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# XXX hmmm.. a normal install puts include files here
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g['INCLUDEPY'] = get_python_inc(plat_specific=0)
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g['SO'] = '.pyd'
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g['exec_prefix'] = exec_prefix
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def _init_mac():
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"""Initialize the module as appropriate for Macintosh systems"""
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g = globals()
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# load the installed config.h (what if not installed? - still need to
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# be able to install packages which don't require compilation)
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parse_config_h(open(
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os.path.join(sys.exec_prefix, "Mac", "Include", "config.h")), g)
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# set basic install directories
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g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
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g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
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# XXX hmmm.. a normal install puts include files here
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g['INCLUDEPY'] = get_python_inc(plat_specific=0)
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g['SO'] = '.ppc.slb'
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g['exec_prefix'] = sys.exec_prefix
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print sys.prefix
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# XXX are these used anywhere?
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g['install_lib'] = os.path.join(sys.exec_prefix, "Lib")
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g['install_platlib'] = os.path.join(sys.exec_prefix, "Mac", "Lib")
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try:
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exec "_init_" + os.name
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except NameError:
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# not needed for this platform
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pass
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else:
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exec "_init_%s()" % os.name
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del _init_posix
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del _init_nt
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del _init_mac
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