feat: add channel support to UpdaterOptions for controlling electron-updater yml file selection (#134)

Author: iamdin

src/main/core/types.ts

@@ -15,6 +15,7 @@ export type FeedURLOptions = Parameters<AppUpdater['setFeedURL']>[0];
 
 export interface UpdaterOptions {
   feedURL?: FeedURLOptions | (() => Promise<FeedURLOptions>);
+  channel?: string;
 }
 
 export interface MainAppOptions {

src/main/updater/service.ts

@@ -30,6 +30,10 @@ class UpdaterService {
     this.mainWindow = mainWindow;
 
     if (!this.isAutoUpdaterSetup) {
+      if (updaterOptions?.channel) {
+        autoUpdater.channel = updaterOptions.channel;
+      }
+
       if (updaterOptions?.feedURL) {
         try {
           const resolved =