Use yargs for non-headless Flipper args parsing

Summary:
This seems like a better approach than ad-hoc lookup in
`electron.remove.argv`. Left a note to a task to provide
a better interface to this.

I also need this in order to ensure we're starting
Flipper through the launcher which needs to happen
before we start the Electron runtime.

Reviewed By: jknoxville

Differential Revision: D13881355

fbshipit-source-id: 69c70d71035a47084f789ddb4dc969b45ba4648b

static/setup.js

@@ -9,7 +9,7 @@ const path = require('path');
 const os = require('os');
 const fs = require('fs');
 
-module.exports = function() {
+module.exports = function(argv) {
   if (!process.env.ANDROID_HOME) {
     process.env.ANDROID_HOME = '/opt/android_sdk';
   }
@@ -27,7 +27,11 @@ module.exports = function() {
   }
 
   const configPath = path.join(flipperDir, 'config.json');
-  let config = {pluginPaths: [], disabledPlugins: [], lastWindowPosition: {}};
+  let config = {
+    pluginPaths: [],
+    disabledPlugins: [],
+    lastWindowPosition: {},
+  };
 
   try {
     config = {
@@ -39,5 +43,11 @@ module.exports = function() {
     fs.writeFileSync(configPath, JSON.stringify(config));
   }
 
+  // Non-persistent CLI arguments.
+  config = {
+    ...config,
+    updaterEnabled: argv.updater,
+  };
+
   return {config, configPath, flipperDir};
 };