zeroinstall/injector/requirements.py

   1 """
   2 Holds information about what the user asked for (which program, version constraints, etc).
   3 """
   4
   5 # Copyright (C) 2011, Thomas Leonard
   6 # See the README file for details, or visit http://0install.net.
   7
   8 from zeroinstall import _
   9
  10 class Requirements(object):
  11         """
  12         Holds information about what the user asked for (which program, version constraints, etc).
  13         """
  14         __slots__ = [
  15                 'interface_uri',
  16                 'command',
  17                 'source',
  18                 'before', 'not_before',
  19                 'os', 'cpu',
  20                 'message',
  21         ]
  22
  23         def __init__(self, interface_uri):
  24                 self.interface_uri = interface_uri
  25                 self.command = 'run'
  26                 self.source = False
  27                 self.before = self.not_before = None
  28                 self.os = self.cpu = None
  29                 self.message = None
  30
  31         def parse_options(self, options):
  32                 self.not_before = options.not_before
  33                 self.before = options.before
  34
  35                 self.source = bool(options.source)
  36                 self.message = options.message
  37
  38                 self.cpu = options.cpu
  39                 self.os = options.os
  40
  41                 # (None becomes 'run', while '' becomes None)
  42                 if options.command is None:
  43                         if self.source:
  44                                 self.command = 'compile'
  45                         else:
  46                                 self.command = 'run'
  47                 else:
  48                         self.command = options.command or None
  49
  50         def get_as_options(self):
  51                 gui_args = []
  52                 if self.not_before:
  53                         gui_args.insert(0, self.not_before)
  54                         gui_args.insert(0, '--not-before')
  55                 if self.before:
  56                         gui_args.insert(0, self.before)
  57                         gui_args.insert(0, '--before')
  58                 if self.source:
  59                         gui_args.insert(0, '--source')
  60                 if self.message:
  61                         gui_args.insert(0, self.message)
  62                         gui_args.insert(0, '--message')
  63                 if self.cpu:
  64                         gui_args.insert(0, self.cpu)
  65                         gui_args.insert(0, '--cpu')
  66                 if self.os:
  67                         gui_args.insert(0, self.os)
  68                         gui_args.insert(0, '--os')
  69                 gui_args.append('--command')
  70                 gui_args.append(self.command or '')
  71
  72                 return gui_args