text: # Copyright 2013 Eucalyptus Systems, Inc.
  #
  # Redistribution and use of this software in source and binary forms,
  # with or without modification, are permitted provided that the following
  # conditions are met:
  #
  #   Redistributions of source code must retain the above copyright notice,
  #   this list of conditions and the following disclaimer.
  #
  #   Redistributions in binary form must reproduce the above copyright
  #   notice, this list of conditions and the following disclaimer in the
  #   documentation and/or other materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  from euca2ools.commands.autoscaling.argtypes import autoscaling_tag_def
  from requestbuilder import Arg
  
  
  class TagArg(Arg):
      def __init__(self, required=False):
          helpstr = '''attributes of a tag to affect.  Tags follow the following
          format: "id=resource-name, t=resource-type, k=tag-key, v=tag-val,
          p=propagate-at-launch-flag", where k is the tag's name, v is the tag's
          value, id is a resource ID, t is a resource type, and p is whether to
          propagate tags to instances created by the group.  A value for 'k=' is
          required for each tag.  The rest are optional.  This argument may be
          used more than once.  Each time affects a different tag.'''
  
          if required:
              helpstr += '  (at least 1 required)'
  
          Arg.__init__(self, '--tag', dest='Tags.member', required=required,
                       action='append', type=autoscaling_tag_def, help=helpstr,
                       metavar=('"k=VALUE, id=VALUE, t=VALUE, v=VALUE, '
                                'p={true,false}"'))
  