| """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 |
| |
| prefix = os.path.normpath (sys.prefix) |
| exec_prefix = os.path.normpath (sys.exec_prefix) |
| |
| |
| def get_config_h_filename(): |
| """Return full pathname of installed config.h file.""" |
| if os.name == "nt": |
| return os.path.join(exec_prefix, "include", "config.h") |
| else: |
| return os.path.join(exec_prefix, |
| "include", "python" + sys.version[:3], |
| "config.h") |
| |
| def get_makefile_filename(): |
| """Return full pathname of installed Makefile from the Python build.""" |
| return os.path.join(exec_prefix, |
| "lib", "python" + sys.version[:3], |
| "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'] = os.path.join(exec_prefix, "Lib") |
| g['BINLIBDEST'] = os.path.join(exec_prefix, "Lib") |
| |
| # XXX hmmm.. a normal install puts include files here |
| g['INCLUDEPY'] = os.path.join(prefix, 'include') |
| |
| g['SO'] = '.pyd' |
| g['exec_prefix'] = exec_prefix |
| |
| |
| 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 |