update runtime to function

runtime/runtime.go

@@ -0,0 +1,39 @@
+// Package runtime is a service runtime manager
+package runtime
+
+// Runtime is a service runtime manager
+type Runtime interface {
+	// Registers a service
+	Register(*Service) error
+	// starts the runtime
+	Run() error
+	// Shutdown the runtime
+	Stop() error
+}
+
+type Service struct {
+	// name of the service
+	Name string
+	// url location of source
+	Source string
+	// path to store source
+	Path string
+	// exec command
+	Exec string
+}
+
+var (
+	DefaultRuntime = newRuntime()
+)
+
+func Register(s *Service) error {
+	return DefaultRuntime.Register(s)
+}
+
+func Run() error {
+	return DefaultRuntime.Run()
+}
+
+func Stop() error {
+	return DefaultRuntime.Stop()
+}