Class: Fission::Command::SnapshotRevert

Inherits:
Fission::Command show all
Defined in:
lib/fission/command/snapshot_revert.rb

Instance Attribute Summary

Attributes inherited from Fission::Command

#args, #options

Instance Method Summary collapse

Methods inherited from Fission::Command

help

Constructor Details

#initialize(args = []) ⇒ SnapshotRevert

Returns a new instance of SnapshotRevert.



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# File 'lib/fission/command/snapshot_revert.rb', line 5

def initialize(args=[])
  super
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/fission/command/snapshot_revert.rb', line 9

def execute
  unless @args.count == 2
    Fission.ui.output self.class.help
    Fission.ui.output ''
    Fission.ui.output_and_exit 'Incorrect arguments for snapshot revert command', 1
  end

  vm_name, snap_name = @args.take 2

  unless Fission::VM.exists? vm_name
    Fission.ui.output_and_exit "Unable to find the VM #{vm_name} (#{Fission::VM.path(vm_name)})", 1 
  end

  if Fission::Fusion.is_running?
    Fission.ui.output 'It looks like the Fusion GUI is currently running'
    Fission.ui.output_and_exit 'Please exit the Fusion GUI and try again', 1
  end

  @vm = Fission::VM.new vm_name

  unless @vm.snapshots.include? snap_name
    Fission.ui.output_and_exit "Unable to find the snapshot '#{snap_name}'", 1
  end

  Fission.ui.output "Reverting to snapshot '#{snap_name}'"
  @vm.revert_to_snapshot(snap_name)
end

#option_parser ⇒ Object 



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# File 'lib/fission/command/snapshot_revert.rb', line 37

def option_parser
  optparse = OptionParser.new do |opts|
    opts.banner = "\nsnapshot revert: fission snapshot revert my_vm snapshot_1"
  end

  optparse
end