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[tahoe-lafs/zfec.git] / zfec / setuptools-0.6c16dev3.egg / setuptools / site-patch.py
1 def __boot():
2     import sys, imp, os, os.path
3     PYTHONPATH = os.environ.get('PYTHONPATH')
4     if PYTHONPATH is None or (sys.platform=='win32' and not PYTHONPATH):
5         PYTHONPATH = []
6     else:
7         PYTHONPATH = PYTHONPATH.split(os.pathsep)
8
9     pic = getattr(sys,'path_importer_cache',{})
10     stdpath = sys.path[len(PYTHONPATH):]
11     mydir = os.path.dirname(__file__)
12     #print "searching",stdpath,sys.path
13
14     for item in stdpath:
15         if item==mydir or not item:
16             continue    # skip if current dir. on Windows, or my own directory
17         importer = pic.get(item)
18         if importer is not None:
19             loader = importer.find_module('site')
20             if loader is not None:
21                 # This should actually reload the current module
22                 loader.load_module('site')
23                 break
24         else:
25             try:
26                 stream, path, descr = imp.find_module('site',[item])
27             except ImportError:
28                 continue
29             if stream is None:
30                 continue
31             try:
32                 # This should actually reload the current module
33                 imp.load_module('site',stream,path,descr)
34             finally:
35                 stream.close()
36             break
37     else:
38         raise ImportError("Couldn't find the real 'site' module")
39
40     #print "loaded", __file__
41
42     known_paths = dict([(makepath(item)[1],1) for item in sys.path]) # 2.2 comp
43
44     oldpos = getattr(sys,'__egginsert',0)   # save old insertion position
45     sys.__egginsert = 0                     # and reset the current one
46
47     for item in PYTHONPATH:
48         addsitedir(item)
49
50     sys.__egginsert += oldpos           # restore effective old position
51
52     d,nd = makepath(stdpath[0])
53     insert_at = None
54     new_path = []
55
56     for item in sys.path:
57         p,np = makepath(item)
58
59         if np==nd and insert_at is None:
60             # We've hit the first 'system' path entry, so added entries go here
61             insert_at = len(new_path)
62
63         if np in known_paths or insert_at is None:
64             new_path.append(item)
65         else:
66             # new path after the insert point, back-insert it
67             new_path.insert(insert_at, item)
68             insert_at += 1
69
70     sys.path[:] = new_path
71
72 if __name__=='site':
73     __boot()
74     del __boot