Generate stable name when not using filename

Currently it uses the URL which creates invalid paths like /pending/temp-http:/myurl.com/latest

Author: Sytten

packages/electron-updater/src/AppUpdater.ts

@@ -12,7 +12,7 @@ import {
   BlockMap,
   retry,
 } from "builder-util-runtime"
-import { randomBytes } from "crypto"
+import { randomBytes, createHash } from "crypto"
 import { release } from "os"
 import { EventEmitter } from "events"
 import { mkdir, outputFile, readFile, rename, unlink } from "fs-extra"
@@ -698,11 +698,13 @@ export abstract class AppUpdater extends (EventEmitter as new () => TypedEmitter
     function getCacheUpdateFileName(): string {
       // NodeJS URL doesn't decode automatically
       const urlPath = decodeURIComponent(taskOptions.fileInfo.url.pathname)
-      if (urlPath.endsWith(`.${taskOptions.fileExtension}`)) {
+      if (urlPath.toLowerCase().endsWith(`.${taskOptions.fileExtension.toLowerCase()}`)) {
         return path.basename(urlPath)
       } else {
-        // url like /latest, generate name
-        return taskOptions.fileInfo.info.url
+        // url like /latest, generate stable name
+        const hash = createHash("sha1")
+        hash.update(taskOptions.fileInfo.url.toString())
+        return hash.digest("hex")
       }
     }