Prevent reading latest song from a log right after a service started.

internal/radio/icecast.go

@@ -24,6 +24,7 @@ const (
 var (
 	lastPlayedCache      []Song
 	lastPlayedCacheMutex sync.Mutex
+	isJustStarted        bool = true
 )
 
 type IcecastStatusDTO struct {
@@ -203,6 +204,10 @@ func (pw *PlaylistLogWatcher) Watch(playlistPath string, n int) (err error) {
 			select {
 			case mask := <-pw.changed:
 				if mask&syscall.IN_MODIFY > 0 {
+					if isJustStarted {
+						isJustStarted = false
+						break
+					}
 					lastPlayedCacheMutex.Lock()
 					if lastPlayedCache == nil {
 						lastPlayedCache = make([]Song, n)