fixed waitgroup

.vscode/launch.json

@@ -9,9 +9,9 @@
       "program": "${workspaceFolder}/main.go",
       "env":{
         "SLIDESHOW_API": "localhost:3000",
-        "SLIDESHOW_INTERVAL": "60",
+        "SLIDESHOW_INTERVAL": "3",
         "SLIDESHOW_RESOLUTION": "",
-        "SLIDESHOW_PALETTE": "/tmp/.slideshow.palette",
+        "SLIDESHOW_PALETTE": "",
         "SLIDESHOW_PALETTE_ALGORITHM": "",
         "SLIDESHOW_PALETTE_COLORS": "",
         "SLIDESHOW_SCRIPT": "",

internal/slideshow.go

@@ -66,10 +66,10 @@ func setBackground(name string, waitgroup *sync.WaitGroup) {
 // encapsulated method to set the background image in a goroutine
 func exportColorPalette(name string, waitgroup *sync.WaitGroup) {
 	timestamp := time.Now().UnixMilli()
+	defer waitgroup.Done()
 	if !config.IsPaletteSet() {
 		return
 	}
-	defer waitgroup.Done()
 	if config.IsScriptStagePrePalette() {
 		runScript(false)
 	}