fix(auto-updater): use updateInfo.path as AppImage installer name (#2722)

Close #2672

Author: AdrianoFerrari

packages/electron-updater/src/BaseUpdater.ts

@@ -37,7 +37,7 @@ export abstract class BaseUpdater extends AppUpdater {
 
     const cacheDir = this.downloadedUpdateHelper.cacheDir
     await ensureDir(cacheDir)
-    const updateFileName = `installer-${version}.${taskOptions.fileExtension}`
+    const updateFileName = taskOptions.fileExtension === "AppImage" ? path.basename(updateInfo.path) : `installer-${version}.${taskOptions.fileExtension}`
     const updateFile = path.join(cacheDir, updateFileName)
     const packageFile = packageInfo == null ? null : path.join(cacheDir, `package-${version}.${path.extname(packageInfo.path) || "7z"}`)
 
@@ -147,4 +147,4 @@ export interface DownloadExecutorTask {
   readonly fileInfo: ResolvedUpdateFileInfo
   readonly updateInfo: UpdateInfo
   readonly task: (destinationFile: string, packageFile: string | null, removeTempDirIfAny: () => Promise<any>) => Promise<any>
-}
+}