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