The portion of openshift.rb which defines the cartridge_repository_action function for managing cartridges on OpenShift nodes.

cartridge_repository_action.rb

      def cartridge_repository_action
        Log.instance.info("action: #{request.action}_action, agent=#{request.agent}, data=#{request.data.pretty_inspect}")
        action            = request[:action]
        path              = request[:path]
        name              = request[:name]
        version           = request[:version]
        cartridge_version = request[:cartridge_version]

        reply[:output] = "#{action} succeeded for #{path}"
        begin
          case action
            when 'install'
              ::OpenShift::Runtime::CartridgeRepository.instance.install(path)
            when 'erase'
              ::OpenShift::Runtime::CartridgeRepository.instance.erase(name, version, cartridge_version)
            when 'list'
              reply[:output] = ::OpenShift::Runtime::CartridgeRepository.instance.to_s
            else
              reply.fail(
                  "#{action} is not implemented. openshift.ddl may be out of date.",
                  2)
              return
          end
        rescue Exception => e
          report_exception e
          Log.instance.info("cartridge_repository_action(#{action}): failed #{e.message}\n#{e.backtrace}")
          reply.fail!("#{action} failed for #{path} #{e.message}", 4)
        end
      end