CLI parse args, step 1

cmd/mxl-player/main.go

@@ -15,6 +15,7 @@ import (
 
 	vk "github.com/christerso/vulkan-go/vk"
 	"github.com/qvest-digital/go-mxl/mxl"
+	pflag "github.com/spf13/pflag"
 )
 
 const (
@@ -24,9 +25,65 @@ const (
 	WIN_HEIGHT int32 = 720
 )
 
+type CliArgs struct {
+	ShowHelp     bool
+	Domain       string
+	VideoFlowId  string
+	AudioFlowId  string
+	IsFullscreen bool
+	PlaybackId   uint32
+	GpuId        uint32
+	IsVerbose    bool
+	ListAudio    bool
+	ListGPU      bool
+}
+
+func printCliHelp(fs *pflag.FlagSet) {
+	fmt.Printf("%s %s\n", APP_NAME, APP_VER)
+	fmt.Println("Usage: mxl-player -d <domain> (-v <uuid> | -a <uuid>) [-f] [-h]...")
+	fmt.Println("                  [-g <gpu-id>] [-p <playback-id>] [--verbose]")
+	fmt.Println("   or: mxl-player [--list-playback] [--list-gpu]")
+	fmt.Println("   or: mxl-player (and set everything in GUI)")
+	fmt.Println()
+	fs.PrintDefaults()
+}
+
 func main() {
+	// CLI args TODO:
+	// help + sample of good usage
+	// domain (-d, --domain)
+	// video flow UUID (-v, --video)
+	// audio flow UUID (-a, --audio)
+	// list-audio for list audio playback devices (-la, --list-playback)
+	// list-video fpr list video playback devices (-lg, --list-gpu)
+	// gpu-id for GPU selection (-p, --playback-id)
+	// playback-id for playback id selection (-g, --gpu-id)
+	// verbose flag, which turn on logs (-vb,--verbose)
+	//
 	// video: 5fbec3b1-1b0f-417d-9059-8b94a47197ed
 	// audio: 5fbec3b1-1b0f-417d-9059-8b94a47197ec
+
+	var args CliArgs
+	flagSet := pflag.NewFlagSet(APP_NAME, pflag.ExitOnError)
+	flagSet.BoolVarP(&args.ShowHelp, "help", "h", false, "Show help message and exit")
+	flagSet.StringVarP(&args.Domain, "domain", "d", "", "MXL domain directory")
+	flagSet.StringVarP(&args.VideoFlowId, "video", "v", "", "Video flow UUID")
+	flagSet.StringVarP(&args.AudioFlowId, "audio", "a", "", "Audio flow UUID")
+	flagSet.BoolVarP(&args.IsFullscreen, "fullscreen", "f", false, "Run app in fullscreen mode")
+	flagSet.Uint32VarP(&args.GpuId, "gpu-id", "g", 0, "GPU id")
+	flagSet.Uint32VarP(&args.PlaybackId, "playback-id", "p", 0, "Playback audio device id")
+	flagSet.BoolVar(&args.IsVerbose, "verbose", false, "Verbose output")
+	flagSet.BoolVar(&args.ListAudio, "list-playback", false, "List audio playback devices and exit")
+	flagSet.BoolVar(&args.ListGPU, "list-gpu", false, "List GPU's and exit")
+	pflag.Parse()
+
+	if args.Domain == "" || args.ShowHelp {
+		// TODO. Fix after polishing GUI
+		// Cause required/optional will be changed
+		printCliHelp(flagSet)
+	}
+	return
+
 	var videoFlowId, audioFlowId string
 	mxlDomain := flag.String("d", "/dev/shm/mxl", "MXL domain")
 	mxlVideoFlowID := flag.String("v", videoFlowId, "MXL video flow UUID")