python/rox/fileutils.py

   1 """Utilities to perform various operations on paths, with support for
   2 opening the ROX filer to examine locations if things go wrong.
   3
   4 Typical usage:
   5
   6         import rox.fileutils
   7         rox.fileutils.makedirs('/path/for/new/directory')
   8 """
   9
  10 import os
  11 from rox import _
  12
  13 def report_patherror(message, path):
  14         """Display a <Cancel>/<Retry>/<Examine> dialog.
  15         This will raise an OSError exception if the user selects Cancel, or
  16         will return successfully if the user chooses to retry."""
  17         from rox import g, filer, toplevel_ref, toplevel_unref, ButtonMixed
  18         toplevel_ref()
  19         box = g.MessageDialog(None, 0, g.MESSAGE_QUESTION,
  20                                 g.BUTTONS_CANCEL, message)
  21
  22         button = ButtonMixed(g.STOCK_REDO, _('Retry'))
  23         button.set_flags(g.CAN_DEFAULT)
  24         button.show()
  25         box.add_action_widget(button, g.RESPONSE_OK)
  26
  27         button = ButtonMixed(g.STOCK_JUMP_TO, _('Examine'))
  28         button.set_flags(g.CAN_DEFAULT)
  29         button.show()
  30         box.add_action_widget(button, g.RESPONSE_APPLY)
  31
  32         box.set_position(g.WIN_POS_CENTER)
  33         box.set_title(_('Error:'))
  34         box.set_default_response(g.RESPONSE_APPLY)
  35         while 1:
  36                 resp = box.run()
  37                 if resp != int(g.RESPONSE_APPLY): break
  38                 filerpath = os.path.normpath(path)
  39                 filer.show_file(filerpath)
  40         box.destroy()
  41         toplevel_unref()
  42         if resp != int(g.RESPONSE_OK):
  43                 raise OSError, message
  44
  45 def _makedirs_recursive(path, mode):
  46         """Recursive part of makedirs. Calls itself to ensure head
  47         of path exists, and then makes a new directory at path. Returns
  48         an Exception if it can't make a directory at path."""
  49         if os.path.isdir(path): return
  50         head, tail = os.path.split(path)
  51         if not tail:
  52                 head, tail = os.path.split(head)
  53         if head and tail:
  54                 _makedirs_recursive(head, mode)
  55
  56         while True:
  57                 if os.path.exists(path):
  58                         report_patherror( \
  59                                 _("Could not create directory `%s' because a file already exists at that path.\n") % path, path)
  60                         continue
  61                 try:
  62                         os.mkdir(path, mode)
  63                         return
  64                 except OSError, msg:
  65                         report_patherror(("%s.\n" + _("Could not create directory `%s'.\n")) \
  66                                 % (msg[1], path), path)
  67
  68 def makedirs(path, mode=0777):
  69         """Make a directory at the specified path, creating intermediate
  70         directories if necessary. No error if 'path' is already a directory.
  71
  72         On error, a dialog which allows the user to open the filer to fix
  73         things and then retry will be opened.
  74
  75         Returns successfully if all directories get created (or already exist),
  76         Raises an OSError if there is a problem, in which case the application
  77         should not open a dialog box to inform the user, since one will already
  78         have been displayed.
  79         """
  80         # Get rid of any ..'s in the path
  81         path = os.path.normpath(path)
  82         _makedirs_recursive(path, mode)
  83