return errors and handle os.Exit in cmd file

cmd/ripsort.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"log/slog"
+	"os"
 
 	ripsort "git.kapelle.org/niklas/ripsort/internal"
 	"github.com/alexflint/go-arg"
@@ -49,17 +50,23 @@ func Run() {
 
 	switch {
 	case args.Info != nil:
-		ripsort.Scan(args.Info.File)
+		if err := ripsort.Scan(args.Info.File); err != nil {
+			os.Exit(1)
+		}
 	case args.Sort != nil:
-		ripsort.Sort(args.Sort.Dst, args.Sort.Path)
+		if err := ripsort.Sort(args.Sort.Dst, args.Sort.Path); err != nil {
+			os.Exit(1)
+		}
 	case args.SyncPlaylists != nil:
-		ripsort.SyncPlaylists(
+		if err := ripsort.SyncPlaylists(
 			args.SyncPlaylists.SpotifyClientID,
 			args.SyncPlaylists.SpotifyClientSecret,
 			args.SyncPlaylists.NavidromeURL,
 			args.SyncPlaylists.NavidromeUser,
 			args.SyncPlaylists.NavidromePass,
-		)
+		); err != nil {
+			os.Exit(1)
+		}
 	default:
 		p.Fail("Must specify command")
 	}