From caac8a92983f56a1ab54aa092dc1970e6c02c43b Mon Sep 17 00:00:00 2001
From: Alexander Drozdov <snosme@gmail.com>
Date: Sat, 4 Apr 2020 16:06:09 +0300
Subject: [PATCH] single instance

---
 src/background.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/background.ts b/src/background.ts
index 7b4337ad..214d78d8 100644
--- a/src/background.ts
+++ b/src/background.ts
@@ -16,7 +16,10 @@ import { logger } from './main/logger'
 import os from 'os'
 const isDevelopment = process.env.NODE_ENV !== 'production'
 
-// Scheme must be registered before the app is ready
+if (!app.requestSingleInstanceLock()) {
+  app.exit()
+}
+
 protocol.registerSchemesAsPrivileged([{ scheme: 'app', privileges: { secure: true, standard: true } }])
 app.allowRendererProcessReuse = true
 if (!config.get('hardwareAcceleration')) {