app now only allows a single instance

app.go

@@ -2,8 +2,13 @@ package main
 
 import (
 	"context"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+	"strings"
 )
 
+var wailsContext *context.Context
+
 // App struct
 type App struct {
 	ctx context.Context
@@ -17,6 +22,16 @@ func NewApp() *App {
 // startup is called when the app starts. The context is saved
 // so we can call the runtime methods
 func (a *App) startup(ctx context.Context) {
-	a.ctx = ctx
+	wailsContext = &ctx
 	//runtime.WindowMaximise(ctx)
 }
+
+func (a *App) onSecondInstanceLaunch(secondInstanceData options.SecondInstanceData) {
+	var secondInstanceArgs = secondInstanceData.Args
+
+	println("user opened second instance", strings.Join(secondInstanceData.Args, ","))
+	println("user opened second from", secondInstanceData.WorkingDirectory)
+	runtime.WindowUnminimise(*wailsContext)
+	runtime.Show(*wailsContext)
+	go runtime.EventsEmit(*wailsContext, "launchArgs", secondInstanceArgs)
+}