Fix auto updating on all platforms.

Added instructions for release.

RELEASING.md

@@ -0,0 +1,24 @@
+# Releasing
+
+Creating a new Session Desktop release is very simple.
+
+1.  Bump up the version in `package.json`.
+2.  Merge all changes required into the `master` branch.
+    * This will trigger github actions to start building a draft release
+3.  After github actions has finished building. Go to Release page in the repository.
+4.  Click on the draft release and change the tag target to `master`.
+5.  Add in release notes.
+6.  Generate gpg signatures.
+7.  Click publish release.
+
+## Notes
+
+Artifacts attached in the release shouldn't be deleted! These include the yml files (latest, latest-mac, latest-linux). These are all necessary to get auto updating to work correctly.
+
+### Mac
+
+Mac currently uses 2 formats `dmg` and `zip`.
+We need the `zip` format for auto updating to work correctly.
+We also need the `dmg` because on MacOS Catalina, there is a system bug where extracting the artifact `zip` using the default _Archive Utility_ will make it so the extracted application is invalid and it will fail to open. A work around for this is to extract the `zip` using an alternate program such as _The Unarchiver_.
+
+Once this bug is fixed we can go back to using the `zip` format by itself.

package.json

@@ -213,12 +213,12 @@
     "appId": "com.loki-project.messenger-desktop",
     "afterSign": "build/notarize.js",
     "artifactName": "${name}-${os}-${arch}-${version}.${ext}",
-    "publish": "github",
     "mac": {
       "category": "public.app-category.social-networking",
       "icon": "build/icons/mac/icon.icns",
       "target": [
-        "dmg"
+        "dmg",
+        "zip"
       ],
       "bundleVersion": "1",
       "hardenedRuntime": true,
@@ -232,6 +232,7 @@
     "win": {
       "asarUnpack": "node_modules/spellchecker/vendor/hunspell_dictionaries",
       "publisherName": "Loki Project",
+      "verifyUpdateCodeSignature": false,
       "icon": "build/icons/win/icon.ico",
       "target": [
         "nsis"

ts/updater/updater.ts

@@ -1,5 +1,7 @@
+import * as path from 'path';
+import * as fs from 'fs-extra';
 import { autoUpdater } from 'electron-updater';
-import { BrowserWindow } from 'electron';
+import { app, BrowserWindow } from 'electron';
 import { markShouldQuit } from '../../app/window_state';
 import {
   getPrintableError,
@@ -44,6 +46,13 @@ async function checkForUpdates(
     return;
   }
 
+  const canUpdate = await canAutoUpdate();
+  if (!canUpdate) {
+    return;
+  }
+
+  isUpdating = true;
+
   logger.info('auto-update: checking for update...');
 
   try {
@@ -75,3 +84,34 @@ async function checkForUpdates(
     isUpdating = false;
   }
 }
+
+/*
+  Check if we have the required files to auto update.
+  These files won't exist inside certain formats such as a linux deb file.
+*/
+async function canAutoUpdate(): Promise<boolean> {
+  const isPackaged = app.isPackaged;
+
+  // On a production app, we need to use resources path to check for the file
+  if (isPackaged && !process.resourcesPath) {
+    return false;
+  }
+
+  // Taken from: https://github.com/electron-userland/electron-builder/blob/d4feb6d3c8b008f8b455c761d654c8088f90d8fa/packages/electron-updater/src/ElectronAppAdapter.ts#L25
+  const updateFile = isPackaged ? 'app-update.yml' : 'dev-app-update.yml';
+  const basePath =
+    isPackaged && process.resourcesPath
+      ? process.resourcesPath
+      : app.getAppPath();
+  const appUpdateConfigPath = path.join(basePath, updateFile);
+
+  return new Promise(resolve => {
+    try {
+      // tslint:disable-next-line: non-literal-fs-path
+      const exists = fs.existsSync(appUpdateConfigPath);
+      resolve(exists);
+    } catch (e) {
+      resolve(false);
+    }
+  });
+}