srv

type App interface {
	// Name app/service name
	Name() string

	// DisplayName app/service display name
	DisplayName() string

	// Description app/service description
	Description() string

	// Version app version
	Version() string

	// Usage print command line usage
	Usage()

	// Init initialize the app
	Init()

	// Reload reload the app
	Reload()

	// Run run the app
	Run()

	// Shutdown shutdown the app
	Shutdown()

	// Wait wait signal for reload or shutdown
	Wait()
}

type Cmd interface {
	// Flag set custom options
	Flag()

	// PrintCommand print custom command
	PrintCommand(out io.Writer)

	// Exec execute optional command except the internal command
	// Basic: 'help' 'usage' 'version'
	// Windows only: 'install' 'remove' 'start' 'stop' 'debug'
	Exec(cmd string)
}