Add ComputerListener generator

lib/jenkins/plugin/cli/generate.rb

@@ -48,6 +48,12 @@ def run_listener(name)
           @name = name
           template('templates/run_listener.tt', "models/#{name.downcase}_listener.rb")
         end
+
+        desc "computer_listener", "computer_listener NAME", :desc => "create a new computer listener"
+        def computer_listener(name)
+          @name = name
+          template('templates/computer_listener.tt', "models/#{name.downcase}_listener.rb")
+        end
       end
     end
   end

lib/jenkins/plugin/cli/templates/computer_listener.tt

@@ -0,0 +1,61 @@
+class <%= name.capitalize %>Listener
+  include Jenkins::Slaves::ComputerListener
+
+  # Called before a {ComputerLauncher} is asked to launch a connection with {Computer}.
+  #
+  # This enables you to do some configurable checks to see if we
+  # want to bring this slave online or if there are considerations
+  # that would keep us from doing so.
+  #
+  # Calling Computer#abort would let you veto the launch operation. Other thrown exceptions
+  # will also have the same effect
+  #
+  # @param [Jenkins::Model::Computer] computer the computer about to be launched
+  # @param [Jenkins::Model::Listener] listener the listener connected to the slave console log.
+  def prelaunch(computer, listener)
+  end
+
+  # Called when a slave attempted to connect via {ComputerLauncher} but failed.
+  #
+  # @param [Jenkins::Model::Computer] computer the computer that was trying to launch
+  # @param [Jenkins::Model::Listener] listener the listener connected to the slave console log
+  def launchfailed(computer, listener)
+  end
+
+  # Called before a {Computer} is marked online.
+  #
+  # This enables you to do some work on all the slaves
+  # as they get connected. Unlike {#online},
+  # a failure to carry out this function normally will prevent
+  # a computer from marked as online.
+  #
+  # @param [Jenkins::Remote::Channel] channel the channel object to talk to the slave.
+  # @param [Jenkins::FilePath] root the directory where this slave stores files.
+  # @param [Jenkins::Model::Listener] listener connected to the launch log of the computer.
+  # @see {#online}
+  def preonline(computer, channel, root, listener)
+  end
+
+  # Called right after a {Computer} comes online.
+  #
+  # This enables you to do some work on all the slaves
+  # as they get connected.
+  #
+  #
+  # @param [Jenkins::Model::Computer] computer the computer that just came online
+  # @param [Jenkins::Model::Listener] listener connected to the launch log of the computer.
+  # @see {#preonline}
+  #
+  def online(computer, listener)
+  end
+
+  # Called right after a {@link Computer} went offline.
+  #
+  # @param [Jenkins::Model::Computer] computer the computer that just went offline
+  def offline(computer)
+  end
+
+  # Called when configuration of the node was changed, a node is added/removed, etc.
+  def configured()
+  end
+end