port updater to ts

app/auto-updater-linux.ts

@@ -1,7 +1,8 @@
 import fetch from 'electron-fetch';
 import {EventEmitter} from 'events';
 
-class AutoUpdater extends EventEmitter {
+class AutoUpdater extends EventEmitter implements Electron.AutoUpdater {
+  updateURL!: string;
   quitAndInstall() {
     this.emitError('QuitAndInstall unimplemented');
   }
@@ -9,8 +10,8 @@ class AutoUpdater extends EventEmitter {
     return this.updateURL;
   }
 
-  setFeedURL(updateURL) {
+  setFeedURL(options: Electron.FeedURLOptions) {
-    this.updateURL = updateURL;
+    this.updateURL = options.url;
   }
 
   checkForUpdates() {
@@ -20,16 +21,18 @@ class AutoUpdater extends EventEmitter {
     this.emit('checking-for-update');
 
     fetch(this.updateURL)
-      .then(res => {
+      .then((res): any => {
         if (res.status === 204) {
           return this.emit('update-not-available');
         }
+        // eslint-disable-next-line @typescript-eslint/camelcase
         return res.json().then(({name, notes, pub_date}) => {
           // Only name is mandatory, needed to construct release URL.
           if (!name) {
             throw new Error('Malformed server response: release name is missing.');
           }
           // If `null` is passed to Date constructor, current time will be used. This doesn't work with `undefined`
+          // eslint-disable-next-line @typescript-eslint/camelcase
           const date = new Date(pub_date || null);
           this.emit('update-available', {}, notes, name, date);
         });
@@ -37,11 +40,11 @@ class AutoUpdater extends EventEmitter {
       .catch(this.emitError.bind(this));
   }
 
-  emitError(error) {
+  emitError(error: any) {
     if (typeof error === 'string') {
       error = new Error(error);
     }
-    this.emit('error', error, error.message);
+    this.emit('error', error);
   }
 }
 

app/updater.ts

@@ -1,32 +1,32 @@
 // Packages
-import electron from 'electron';
+import electron, {app, BrowserWindow, AutoUpdater} from 'electron';
-const {app} = electron;
 import ms from 'ms';
 import retry from 'async-retry';
 
 // Utilities
-import {version} from './package';
+import {version} from './package.json';
 import {getDecoratedConfig} from './plugins';
+import autoUpdaterLinux from './auto-updater-linux';
 
 const {platform} = process;
 const isLinux = platform === 'linux';
 
-const autoUpdater = isLinux ? require('./auto-updater-linux').default : electron.autoUpdater;
+const autoUpdater: AutoUpdater = isLinux ? autoUpdaterLinux : electron.autoUpdater;
 
 let isInit = false;
 // Default to the "stable" update channel
 let canaryUpdates = false;
 
-const buildFeedUrl = (canary, currentVersion) => {
+const buildFeedUrl = (canary: boolean, currentVersion: string) => {
   const updatePrefix = canary ? 'releases-canary' : 'releases';
   return `https://${updatePrefix}.hyper.is/update/${isLinux ? 'deb' : platform}/${currentVersion}`;
 };
 
-const isCanary = updateChannel => updateChannel === 'canary';
+const isCanary = (updateChannel: string) => updateChannel === 'canary';
 
 async function init() {
-  autoUpdater.on('error', (err, msg) => {
+  autoUpdater.on('error', err => {
-    console.error('Error fetching updates', `${msg} (${err.stack})`);
+    console.error('Error fetching updates', `${err.message} (${err.stack})`);
   });
 
   const config = await retry(async () => {
@@ -46,7 +46,7 @@ async function init() {
 
   const feedURL = buildFeedUrl(canaryUpdates, version);
 
-  autoUpdater.setFeedURL(feedURL);
+  autoUpdater.setFeedURL({url: feedURL});
 
   setTimeout(() => {
     autoUpdater.checkForUpdates();
@@ -59,19 +59,26 @@ async function init() {
   isInit = true;
 }
 
-export default win => {
+export default (win: BrowserWindow) => {
   if (!isInit) {
     init();
   }
 
   const {rpc} = win;
 
-  const onupdate = (ev, releaseNotes, releaseName, date, updateUrl, onQuitAndInstall) => {
+  const onupdate = (
+    ev: Event,
+    releaseNotes: string,
+    releaseName: string,
+    date: Date,
+    updateUrl: string,
+    onQuitAndInstall: any
+  ) => {
     const releaseUrl = updateUrl || `https://github.com/zeit/hyper/releases/tag/${releaseName}`;
     rpc.emit('update available', {releaseNotes, releaseName, releaseUrl, canInstall: !!onQuitAndInstall});
   };
 
-  const eventName = isLinux ? 'update-available' : 'update-downloaded';
+  const eventName: any = isLinux ? 'update-available' : 'update-downloaded';
 
   autoUpdater.on(eventName, onupdate);
 
@@ -86,7 +93,7 @@ export default win => {
     if (newUpdateIsCanary !== canaryUpdates) {
       const feedURL = buildFeedUrl(newUpdateIsCanary, version);
 
-      autoUpdater.setFeedURL(feedURL);
+      autoUpdater.setFeedURL({url: feedURL});
       autoUpdater.checkForUpdates();
 
       canaryUpdates = newUpdateIsCanary;