checkextensions.py :  » Language-Interface » ChinesePython » chinesepython2.1.3-0.4 » Tools » freeze » Python Open Source

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Python Open Source » Language Interface » ChinesePython 
ChinesePython » chinesepython2.1.3 0.4 » Tools » freeze » checkextensions.py
# Check for a module in a set of extension directories.
# An extension directory should contain a Setup file
# and one or more .o files or a lib.a file.

import os
import string
import parsesetup

def checkextensions(unknown, extensions):
  files = []
  modules = []
  edict = {}
  for e in extensions:
    setup = os.path.join(e, 'Setup')
    liba = os.path.join(e, 'lib.a')
    if not os.path.isfile(liba):
      liba = None
    edict[e] = parsesetup.getsetupinfo(setup), liba
  for mod in unknown:
    for e in extensions:
      (mods, vars), liba = edict[e]
      if not mods.has_key(mod):
        continue
      modules.append(mod)
      if liba:
        # If we find a lib.a, use it, ignore the
        # .o files, and use *all* libraries for
        # *all* modules in the Setup file
        if liba in files:
          break
        files.append(liba)
        for m in mods.keys():
          files = files + select(e, mods, vars,
                     m, 1)
        break
      files = files + select(e, mods, vars, mod, 0)
      break
  return files, modules

def select(e, mods, vars, mod, skipofiles):
  files = []
  for w in mods[mod]:
    w = treatword(w)
    if not w:
      continue
    w = expandvars(w, vars)
    for w in string.split(w):
      if skipofiles and w[-2:] == '.o':
        continue
      # Assume $var expands to absolute pathname
      if w[0] not in ('-', '$') and w[-2:] in ('.o', '.a'):
        w = os.path.join(e, w)
      if w[:2] in ('-L', '-R') and w[2:3] != '$':
        w = w[:2] + os.path.join(e, w[2:])
      files.append(w)
  return files

cc_flags = ['-I', '-D', '-U']
cc_exts = ['.c', '.C', '.cc', '.c++']

def treatword(w):
  if w[:2] in cc_flags:
    return None
  if w[:1] == '-':
    return w # Assume loader flag
  head, tail = os.path.split(w)
  base, ext = os.path.splitext(tail)
  if ext in cc_exts:
    tail = base + '.o'
    w = os.path.join(head, tail)
  return w

def expandvars(str, vars):
  i = 0
  while i < len(str):
    i = k = string.find(str, '$', i)
    if i < 0:
      break
    i = i+1
    var = str[i:i+1]
    i = i+1
    if var == '(':
      j = string.find(str, ')', i)
      if j < 0:
        break
      var = str[i:j]
      i = j+1
    if vars.has_key(var):
      str = str[:k] + vars[var] + str[i:]
      i = k
  return str
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