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"""Provide access to Python's configuration information. The specific names
defined in the module depend heavily on the platform and configuration.
Written by: Fred L. Drake, Jr.
Email: <fdrake@acm.org>
Initial date: 17-Dec-1998
"""
__version__ = "$Revision$"
import os
import re
import string
import sys
from errors import DistutilsPlatformError
PREFIX = os.path.normpath(sys.prefix)
EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
def get_python_inc(plat_specific=0):
"""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 config.h).
"""
prefix = (plat_specific and EXEC_PREFIX or PREFIX)
if os.name == "posix":
return os.path.join(prefix, "include", "python" + sys.version[:3])
elif os.name == "nt":
return os.path.join(prefix, "Include") # include or Include?
elif os.name == "mac":
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):
"""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.
"""
prefix = (plat_specific and EXEC_PREFIX or PREFIX)
if os.name == "posix":
libpython = os.path.join(prefix,
"lib", "python" + sys.version[:3])
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:
return prefix
elif os.name == "mac":
if platform_specific:
if standard_lib:
return os.path.join(EXEC_PREFIX, "Mac", "Plugins")
else:
raise DistutilsPlatformError, \
"OK, where DO site-specific extensions go on the Mac?"
else:
if standard_lib:
return os.path.join(PREFIX, "Lib")
else:
raise DistutilsPlatformError, \
"OK, where DO site-specific modules go on the Mac?"
else:
raise DistutilsPlatformError, \
("I don't know where Python installs its library " +
"on platform '%s'") % os.name
# get_python_lib()
def get_config_h_filename():
"""Return full pathname of installed config.h file."""
inc_dir = get_python_inc(plat_specific=1)
return os.path.join(inc_dir, "config.h")
def get_makefile_filename():
"""Return full pathname of installed Makefile from the Python build."""
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-Z0-9_]+) (.*)\n")
undef_rx = re.compile("/[*] #undef ([A-Z][A-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 = string.atoi(v)
except ValueError: pass
g[n] = v
else:
m = undef_rx.match(line)
if m:
g[m.group(1)] = 0
return g
def parse_makefile(fp, 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.
"""
if g is None:
g = {}
variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)\n")
done = {}
notdone = {}
#
while 1:
line = fp.readline()
if not line:
break
m = variable_rx.match(line)
if m:
n, v = m.group(1, 2)
v = string.strip(v)
if "$" in v:
notdone[n] = v
else:
try: v = string.atoi(v)
except ValueError: pass
done[n] = v
# do variable interpolation here
findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
while notdone:
for name in notdone.keys():
value = notdone[name]
m = findvar1_rx.search(value)
if not m:
m = findvar2_rx.search(value)
if m:
n = m.group(1)
if done.has_key(n):
after = value[m.end():]
value = value[:m.start()] + done[n] + after
if "$" in after:
notdone[name] = value
else:
try: value = string.atoi(value)
except ValueError: pass
done[name] = string.strip(value)
del notdone[name]
elif notdone.has_key(n):
# get it on a subsequent round
pass
else:
done[n] = ""
after = value[m.end():]
value = value[:m.start()] + after
if "$" in after:
notdone[name] = value
else:
try: value = string.atoi(value)
except ValueError: pass
done[name] = string.strip(value)
del notdone[name]
else:
# bogus variable reference; just drop it since we can't deal
del notdone[name]
# save the results in the global dictionary
g.update(done)
return g
def _init_posix():
"""Initialize the module as appropriate for POSIX systems."""
g = globals()
# load the installed config.h:
parse_config_h(open(get_config_h_filename()), g)
# load the installed Makefile:
parse_makefile(open(get_makefile_filename()), g)
def _init_nt():
"""Initialize the module as appropriate for NT"""
g = globals()
# load config.h, though I don't know how useful this is
parse_config_h(open(get_config_h_filename()), 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['exec_prefix'] = EXEC_PREFIX
def _init_mac():
"""Initialize the module as appropriate for Macintosh systems"""
g = globals()
# load the installed config.h (what if not installed? - still need to
# be able to install packages which don't require compilation)
parse_config_h(open(
os.path.join(EXEC_PREFIX, "Mac", "Include", "config.h")), 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'] = '.ppc.slb'
g['exec_prefix'] = EXEC_PREFIX
print sys.prefix, PREFIX
# XXX are these used anywhere?
g['install_lib'] = os.path.join(EXEC_PREFIX, "Lib")
g['install_platlib'] = os.path.join(EXEC_PREFIX, "Mac", "Lib")
try:
exec "_init_" + os.name
except NameError:
# not needed for this platform
pass
else:
exec "_init_%s()" % os.name
del _init_posix
del _init_nt
del _init_mac
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