python/rox/filer.py

   1 """An easy way to get ROX-Filer to do things."""
   2
   3 # Note: do a double-fork in case it's an old version of the filer
   4 # and doesn't automatically background itself.
   5 def _spawn(argv):
   6         """Run a new process and forget about it."""
   7         from os import fork, _exit, execvp, waitpid
   8         child = fork()
   9         if child == 0:
  10                 # We are the child
  11                 child = fork()
  12                 if child == 0:
  13                         # Grandchild
  14                         try:
  15                                 execvp(argv[0], argv)
  16                         except:
  17                                 pass
  18                         print "Warning: exec('%s') failed!" % argv[0]
  19                         _exit(1)
  20                 elif child == -1:
  21                         print "Error: fork() failed!"
  22                 _exit(1)
  23         elif child == -1:
  24                 print "Error: fork() failed!"
  25         waitpid(child, 0)
  26
  27 def spawn_rox(args):
  28         """Run rox (either from PATH or through Zero Install) with the
  29         given arguments."""
  30         import os.path
  31         for dir in os.environ.get('PATH', '').split(':'):
  32                 path = os.path.join(dir, 'rox')
  33                 if os.path.isfile(path):
  34                         _spawn(('rox',) + args)
  35                         return
  36         if os.path.exists('/uri/0install/rox.sourceforge.net'):
  37                 _spawn(('/bin/0run', 'rox.sourceforge.net/rox 2002-01-01') + args)
  38         else:
  39                 print "Didn't find rox in PATH, and Zero Install not present. Trying 'rox' anyway..."
  40                 _spawn(('rox',) + args)
  41
  42 def open_dir(dir):
  43         "Open 'dir' in a new filer window."
  44         spawn_rox(('-d', dir))
  45
  46 def examine(file):
  47         """'file' may have changed (maybe you just created it, for example). Update
  48         any filer views of it."""
  49         spawn_rox(('-x', file))
  50
  51 def show_file(file):
  52         """Open a directory and draw the user's attention to this file. Useful for
  53         'Up' toolbar buttons that show where a file is saved."""
  54         spawn_rox(('-s', file))