Mac/scripts/fixgusidir.py

   1 # fixgusidir - Modify filenames in the CWGUSI source tree, so
   2 # that it can be put under CVS. Needed because there are files with slashes
   3 # in their name, which CVS does not approve of.
   4 #
   5 # Usage:
   6 # - On importing gusi in cvs:
   7 #   - Run the script after unpacking the gusi distribution. This creates
   8 #     _s_ files for all / files.
   9 #   - Remove all / files with "find file" or some such.
  10 #   - import the tree
  11 # - On checking out gusi:
  12 #   - After checkout, run the script to create / files for all _s_ files.
  13 # - After modifying stuff, or later checkouts:
  14 #   - Run the script. Conflicts between / and _s_ files will be reported.
  15 #   - Fix the problems by removing the outdated / or _s_ file.
  16 #   - Run the script again. Possibly do a cvs checkin.
  17 import macfs
  18 import os
  19 import sys
  20 import re
  21
  22 # Substitution for slashes in filenames
  23 SUBST = '_s_'
  24 # Program to find those substitutions
  25 SUBSTPROG = re.compile(SUBST)
  26
  27 def main():
  28         if len(sys.argv) > 1:
  29                 gusidir = sys.argv[1]
  30         else:
  31                 fss, ok = macfs.GetDirectory("CWGUSI source folder?")
  32                 if not ok: sys.exit(0)
  33                 gusidir = fss.as_pathname()
  34         fixgusifolder(gusidir)
  35         sys.exit(1)
  36
  37 def fixgusifolder(gusidir):
  38         """Synchronize files with / in their name with their _s_ counterparts"""
  39         os.path.walk(gusidir, gusiwalk, None)
  40
  41 def gusiwalk(dummy, top, names):
  42         """Helper for fixgusifolder: convert a single directory full of files"""
  43         # First remember names with slashes and with our slash-substitution
  44         macnames = []
  45         codenames = []
  46         for name in names:
  47                 if '/' in name:
  48                         macnames.append(name)
  49                 if SUBSTPROG.search(name):
  50                         codenames.append(name)
  51         # Next, check whether we need to copy any slash-files to subst-files
  52         for name in macnames:
  53                 if os.path.isdir(name):
  54                         print '** Folder with slash in name cannot be handled!'
  55                         sys.exit(1)
  56                 othername = mac2codename(name)
  57                 if len(othername) > 31:
  58                         print '** Converted filename too long:', othername
  59                         sys.exit(1)
  60                 if othername in codenames:
  61                         codenames.remove(othername)
  62                 sync(os.path.join(top, name), os.path.join(top, othername))
  63         # Now codenames contains only files that have no / equivalent
  64         for name in codenames:
  65                 othername = code2macname(name)
  66                 sync(os.path.join(top, name), os.path.join(top, othername))
  67
  68 def mac2codename(name):
  69         return re.sub('/', SUBST, name)
  70
  71 def code2macname(name):
  72         return re.sub(SUBST, '/', name)
  73
  74 def sync(old, new):
  75         if os.path.exists(new):
  76                 # Both exist. Check that they are indentical
  77                 d1 = open(old, 'rb').read()
  78                 d2 = open(new, 'rb').read()
  79                 if d1 == d2:
  80                         print '-- OK         ', old
  81                         return
  82                 print '** OUT-OF-SYNC', old
  83         fp = open(new, 'wb')
  84         fp.write(open(old, 'rb').read())
  85         print '-- COPIED     ', old
  86
  87 if __name__ == '__main__':
  88         main()
  89