print-filename.py

   1 #! /usr/bin/env python
   2 """Print background filename
   3
   4 Print the filename of the current or previous background image.
   5
   6 This file is a part of XSetBg.
   7
   8 """
   9
  10 __author__ = "Oleg Broytman <phd@phdru.name>"
  11 __copyright__ = "Copyright (C) 2004-2015 PhiloSoft Design"
  12 __license__ = "GNU GPL"
  13
  14
  15 import sys
  16 from xsetbg_db import xsetbg_db
  17
  18 if not xsetbg_db:
  19     sys.exit("Error: no database found")
  20
  21
  22 def usage(code=0):
  23     sys.stderr.write("Usage: %s [index]\n" % sys.argv[0])
  24     sys.exit(code)
  25
  26
  27 def get_args():
  28     from getopt import getopt, GetoptError
  29
  30     try:
  31         options, arguments = getopt(sys.argv[1:], "he:",
  32                                     ["help", "output-encoding="])
  33     except GetoptError:
  34         usage(1)
  35
  36     index = 0
  37     output_encoding = None
  38
  39     for option, value in options:
  40         if option in ("-h", "--help"):
  41             usage()
  42         elif option in ("-e", "--output-encoding"):
  43             output_encoding = value
  44         else:
  45             usage(2)
  46
  47     if arguments:
  48         if len(arguments) == 1:
  49             try:
  50                 index = int(arguments[0])
  51             except ValueError:
  52                 usage(3)
  53         else:
  54             usage(4)
  55
  56     if output_encoding is None:
  57         from m_lib.defenc import default_encoding
  58         output_encoding = default_encoding
  59     return index, output_encoding
  60
  61 index, output_encoding = get_args()
  62
  63 filename = xsetbg_db.select('last_shown IS NOT NULL',
  64                             orderBy='-last_shown')[index].full_name
  65
  66 print filename.encode(output_encoding)