Source Code for Module zeroinstall.cmd.show

 1  """ 
 2  The B{0install show} command-line interface. 
 3  """ 
 4   
 5  # Copyright (C) 2012, Thomas Leonard 
 6  # See the README file for details, or visit http://0install.net. 
 7   
 8  from __future__ import print_function 
 9   
10  import os 
11   
12  from zeroinstall import _, SafeException 
13  from zeroinstall.cmd import select, UsageError 
14  from zeroinstall.injector import qdom, selections 
15   
16  syntax = "APP | SELECTIONS" 
17   
18 -def add_options(parser): 
19          parser.add_option("-r", "--root-uri", help=_("display just the root interface URI"), action='store_true') 
20          parser.add_option("", "--xml", help=_("print selections as XML"), action='store_true') 
21   
22 -def handle(config, options, args): 
23          if len(args) != 1: 
24                  raise UsageError() 
25   
26          app = config.app_mgr.lookup_app(args[0], missing_ok = True) 
27          if app is not None: 
28                  sels = app.get_selections() 
29   
30                  r = app.get_requirements() 
31   
32                  if r.extra_restrictions and not options.xml: 
33                          print("User-provided restrictions in force:") 
34                          for uri, expr in r.extra_restrictions.items(): 
35                                  print("  {uri}: {expr}".format(uri = uri, expr = expr)) 
36                          print() 
37          elif os.path.exists(args[0]): 
38                  with open(args[0], 'rb') as stream: 
39                          sels = selections.Selections(qdom.parse(stream)) 
40          else: 
41                  raise SafeException(_("Neither an app nor a file: '%s'") % args[0]) 
42   
43          if options.root_uri: 
44                  print(sels.interface) 
45          elif options.xml: 
46                  select.show_xml(sels) 
47          else: 
48                  select.show_human(sels, config.stores) 
49   
50 -def complete(completion, args, cword): 
51          """@type completion: L{zeroinstall.cmd._Completion} 
52          @type args: [str] 
53          @type cword: int""" 
54          if len(args) != 1: return 
55          completion.expand_apps() 
56          completion.expand_files() 
57