zeroinstall/cmd/update.py

   1 """
   2 The B{0install download} command-line interface.
   3 """
   4
   5 # Copyright (C) 2011, Thomas Leonard
   6 # See the README file for details, or visit http://0install.net.
   7
   8 from __future__ import print_function
   9
  10 import sys
  11
  12 from zeroinstall import SafeException, _
  13 from zeroinstall.injector import model
  14 from zeroinstall.cmd import UsageError, select
  15
  16 syntax = "URI"
  17
  18 add_options = select.add_generic_select_options
  19
  20 def handle(config, options, args):
  21         if len(args) != 1:
  22                 raise UsageError()
  23
  24         assert not options.offline
  25
  26         iface_uri = model.canonical_iface_uri(args[0])
  27
  28         old_gui = options.gui
  29
  30         # Select once in offline console mode to get the old values
  31         options.offline = True
  32         options.gui = False
  33         options.refresh = False
  34
  35         try:
  36                 old_sels = select.get_selections(config, options, iface_uri,
  37                                         select_only = True, download_only = False, test_callback = None)
  38         except SafeException:
  39                 old_selections = {}
  40         else:
  41                 if old_sels is None:
  42                         old_selections = {}
  43                 else:
  44                         old_selections = old_sels.selections
  45
  46         # Download in online mode to get the new values
  47         config.network_use = model.network_full
  48         options.offline = False
  49         options.gui = old_gui
  50         options.refresh = True
  51
  52         sels = select.get_selections(config, options, iface_uri,
  53                                 select_only = False, download_only = True, test_callback = None)
  54         if not sels:
  55                 sys.exit(1)     # Aborted by user
  56
  57         changes = False
  58
  59         for iface, old_sel in old_selections.iteritems():
  60                 new_sel = sels.selections.get(iface, None)
  61                 if new_sel is None:
  62                         print(_("No longer used: %s") % iface)
  63                         changes = True
  64                 elif old_sel.version != new_sel.version:
  65                         print(_("%s: %s -> %s") % (iface, old_sel.version, new_sel.version))
  66                         changes = True
  67
  68         for iface, new_sel in sels.selections.iteritems():
  69                 if iface not in old_selections:
  70                         print(_("%s: new -> %s") % (iface, new_sel.version))
  71                         changes = True
  72
  73         if not changes:
  74                 print(_("No updates found."))