improve fault tolerance and OS compat beyond linux

main.go

@@ -40,17 +40,6 @@ func main() {
 		}
 	}
 
-	learningService := learning.New(ctx, learning.ServiceConfig{
-		TitleFilePath: "learning-title.txt",
-	})
-	musicService := music.New(ctx)
-	twitchService, err := twitch.New(ctx, twitch.ServiceOptions{
-		Port: port,
-	})
-	if err != nil {
-		log.Fatalf("Failed to create Twitch service: %v", err)
-	}
-
 	srv := gin.Default()
 	srv.Use(gin.LoggerWithConfig(gin.LoggerConfig{
 		SkipPaths: []string{
@@ -59,12 +48,28 @@ func main() {
 			"/learning/public",
 		},
 	}))
-	learningService.BindRoutes(srv.Group("/learning"))
-	musicService.BindRoutes(srv.Group("/music"))
-	twitchService.BindRoutes(srv.Group("/twitch"))
 
+	learningService := learning.New(ctx, learning.ServiceConfig{
+		TitleFilePath: "learning-title.txt",
+	})
+	learningService.BindRoutes(srv.Group("/learning"))
+
+	musicService, err := music.New(ctx)
+	if err != nil {
+		log.Printf("Failed to create music service: %v", err)
+	} else {
+		musicService.BindRoutes(srv.Group("/music"))
 		go musicService.Run(ctx)
+	}
+
+	twitchService, err := twitch.New(ctx, twitch.ServiceOptions{ Port: port })
+	if err != nil {
+		log.Printf("Failed to create Twitch service: %v", err)
+	} else {
+		twitchService.BindRoutes(srv.Group("/twitch"))
 		go twitchService.Run(ctx)
+	}
+
 	go func() {
 		log.Printf("Now serving at http://%s:%d\n", host, port)
 		failed <- srv.Run(fmt.Sprintf("%s:%d", host, port))

music/music.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"runtime"
 	"strings"
 	"time"
 
@@ -50,7 +51,11 @@ type (
 	}
 )
 
-func New(ctx context.Context) *Service {
+func New(ctx context.Context) (*Service, error) {
+	if runtime.GOOS != "linux" {
+		return nil, fmt.Errorf("Platform %s is unsupported", runtime.GOOS)
+	}
+
 	nextTrack := make(chan *trackMetadata)
 	nextPlaying := make(chan bool)
 
@@ -63,7 +68,7 @@ func New(ctx context.Context) *Service {
 		playingBroadcast: broadcast.NewBroadcastChannel(ctx, nextPlaying),
 	}
 
-	return srv
+	return srv, nil
 }
 
 func (srv *Service) BindRoutes(group *gin.RouterGroup) {

twitch/twitch.go

@@ -85,12 +85,12 @@ func New(ctx context.Context, opts ServiceOptions) (*Service, error) {
 
 	var config serviceConfig
 	if configFile, err := os.OpenFile(path.Join(DATA_PATH, "twitch-config.json"), os.O_CREATE | os.O_RDWR, 0600); err != nil {
-		log.Fatalf("Failed to open twitch-config.json: %v", err)
+		return nil, fmt.Errorf("Failed to open twitch-config.json: %v", err)
 	} else {
 		defer configFile.Close()
 		// TODO: write template file if empty
 		if err := json.NewDecoder(configFile).Decode(&config); err != nil {
-			log.Fatalf("Failed to read twitch-config.json: %v", err)
+			return nil, fmt.Errorf("Failed to read twitch-config.json: %v", err)
 		}
 	}