Service task for Mac OS X

service.thor.rb

class Service < Thor
  desc "apache", "Apache"
  def apache(action)
    service action do |s|
      s.down { %x[sudo apachectl stop] }
      s.up { %x[sudo apachectl start] }
    end
  end

  desc "memcached", "Memcached"
  def memcached(action)
    launchctl_service action, '/Users/sobstel/Library/LaunchAgents/com.danga.memcached.plist'
  end

  desc "mongo", "MongoDB"
  def mongo(action)
    launchctl_service action, '/Users/sobstel/Library/LaunchAgents/org.mongodb.mongod.plist'
  end

  desc "mysql", "MySQL"
  def mysql(action)
    launchctl_service action, '/Users/sobstel/Library/LaunchAgents/com.mysql.mysqld.plist'  
  end
  
  desc "pow", "Pow (pow.cx)"
  def pow(action)
    launchctl_service action, '/Users/sobstel/Library/LaunchAgents/cx.pow.powd.plist'
  end

  desc "redis", "Redis"
  def redis(action)
    launchctl_service action, '/Users/sobstel/Library/LaunchAgents/io.redis.redis-server.plist'
  end

  private
    def launchctl_service(action, path)
      service action do |s|
        s.down { %x[launchctl unload -w #{path}] }
        s.up { %x[launchctl load -w #{path}] }
      end
    end

    def service(action)     
      yield(ServiceHandler.new(action))
    end

    class ServiceHandler
      def initialize(action)
        @action = action.to_sym
      end

      def call_method?(method)
        case method
          when :down
            [:down, :stop, :unload, :restart].include?(@action)
          when :up
            [:up, :start, :load, :restart].include?(@action)
          else
            false
        end
      end

      def method_missing(m, *args, &block)
        if call_method?(m)
          output = block.call
          status_code = $?.to_i
          puts output unless output.empty?
          puts "Action '#{@action}' failed (exit code: #{status_code})" if status_code > 0
        end
      end
    end
 
 end