Add --launcher-msg option to pass to desktop app

Summary:
Allows the launcher to provide messages to the user. Currently, in the form
of the red notification bar at the bottom. This is just meant as a temporary measure
during the alpha to have some clearly noticeable way of getting the user's attention.

I consider removing this a blocker for the release as this mechanism is not well
suited for this in many ways.

The current use case for this is providing a warning if a cached version is used
instead of the requested one, e.g. "Could not fetch requested Flipper version 'deadbeef', using cached version instead."

Reviewed By: jknoxville, priteshrnandgaonkar

Differential Revision: D14073687

fbshipit-source-id: 85630347027063103315eeb1286731fe2478e261

src/init.js

@@ -18,6 +18,8 @@ import {persistStore} from 'redux-persist';
 import reducers from './reducers/index.js';
 import dispatcher from './dispatcher/index.js';
 import TooltipProvider from './ui/components/TooltipProvider.js';
+import config from './utils/processConfig.js';
+import {initLauncherHooks} from './utils/launcher.js';
 const path = require('path');
 
 const store = createStore(
@@ -55,6 +57,8 @@ function init() {
       (r.installing || r.active).postMessage({precachedIcons});
     })
     .catch(console.error);
+
+  initLauncherHooks(config(), store);
 }
 
 // make init function callable from outside

src/utils/__tests__/processConfig.node.js

@@ -16,6 +16,7 @@ test('config is decoded from env', () => {
     disabledPlugins: ['pluginA', 'pluginB', 'pluginC'],
     pluginPaths: ['/a/path', 'b/path'],
     lastWindowPosition: {x: 4, y: 8, width: 15, height: 16},
+    launcherMsg: 'wubba lubba dub dub',
     updaterEnabled: false,
     screenCapturePath: '/my/screenshot/path',
     launcherEnabled: false,
@@ -25,6 +26,7 @@ test('config is decoded from env', () => {
     disabledPlugins: new Set(['pluginA', 'pluginB', 'pluginC']),
     pluginPaths: ['/a/path', 'b/path'],
     lastWindowPosition: {x: 4, y: 8, width: 15, height: 16},
+    launcherMsg: 'wubba lubba dub dub',
     updaterEnabled: false,
     screenCapturePath: '/my/screenshot/path',
     launcherEnabled: false,
@@ -38,6 +40,7 @@ test('config is decoded from env with defaults', () => {
     disabledPlugins: new Set([]),
     pluginPaths: [],
     lastWindowPosition: undefined,
+    launcherMsg: undefined,
     updaterEnabled: true,
     screenCapturePath: undefined,
     launcherEnabled: true,

src/utils/launcher.js

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import type {ProcessConfig} from './processConfig.js';
+import type {Store} from '../reducers/index.js';
+
+export function initLauncherHooks(config: ProcessConfig, store: Store) {
+  // TODO(T40488739): This must be replaced with a proper display before launching this.
+  if (config.launcherMsg) {
+    store.dispatch({
+      type: 'SERVER_ERROR',
+      payload: config.launcherMsg,
+    });
+  }
+}

src/utils/processConfig.js

@@ -12,6 +12,7 @@ export type ProcessConfig = {|
   pluginPaths: Array<string>,
   lastWindowPosition: ?{x: number, y: number, width: number, height: number},
   screenCapturePath: ?string,
+  launcherMsg: ?string,
   updaterEnabled: boolean,
   // Controls whether to delegate to the launcher if present.
   launcherEnabled: boolean,
@@ -28,6 +29,7 @@ export default function config(): ProcessConfig {
       disabledPlugins: new Set(json.disabledPlugins || []),
       pluginPaths: json.pluginPaths || [],
       lastWindowPosition: json.lastWindowPosition,
+      launcherMsg: json.launcherMsg,
       updaterEnabled:
         typeof json.updaterEnabled === 'boolean' ? json.updaterEnabled : true,
       screenCapturePath: json.screenCapturePath,

static/index.js

@@ -48,6 +48,11 @@ const argv = yargs
     describe: 'Toggle delegating to the update launcher on startup.',
     type: 'boolean',
   })
+  .option('launcher-msg', {
+    describe:
+      '[Internal] Used to provide a user message from the launcher to the user.',
+    type: 'string',
+  })
   .version(global.__VERSION__)
   .help().argv;
 

static/setup.js

@@ -76,6 +76,7 @@ module.exports = function(argv) {
   config = {
     ...config,
     updaterEnabled: argv.updater,
+    launcherMsg: argv.launcherMsg,
   };
 
   return {config, configPath, flipperDir};