Reconnection when signal server is not active and minor changes

electron/app/deep-links.ts

@@ -4,9 +4,24 @@ import { createWindow, getMainWindow } from '../window/create-window';
 
 const CUSTOM_PROTOCOL = 'toju';
 const DEEP_LINK_PREFIX = `${CUSTOM_PROTOCOL}://`;
+const DEV_SINGLE_INSTANCE_EXIT_CODE_ENV = 'METOYOU_SINGLE_INSTANCE_EXIT_CODE';
 
 let pendingDeepLink: string | null = null;
 
+function resolveDevSingleInstanceExitCode(): number | null {
+  const rawValue = process.env[DEV_SINGLE_INSTANCE_EXIT_CODE_ENV];
+
+  if (!rawValue) {
+    return null;
+  }
+
+  const parsedValue = Number.parseInt(rawValue, 10);
+
+  return Number.isInteger(parsedValue) && parsedValue > 0
+    ? parsedValue
+    : null;
+}
+
 function extractDeepLink(argv: string[]): string | null {
   return argv.find((argument) => typeof argument === 'string' && argument.startsWith(DEEP_LINK_PREFIX)) || null;
 }
@@ -60,7 +75,14 @@ export function initializeDeepLinkHandling(): boolean {
   const hasSingleInstanceLock = app.requestSingleInstanceLock();
 
   if (!hasSingleInstanceLock) {
-    app.quit();
+    const devExitCode = resolveDevSingleInstanceExitCode();
+
+    if (devExitCode != null) {
+      app.exit(devExitCode);
+    } else {
+      app.quit();
+    }
+
     return false;
   }