Add --data-dir to switch userData directory

.gitignore

@@ -10,3 +10,4 @@ npm-debug.log*
 test-results.xml
 test_config.json
 .idea
+testUserData

src/browser/index.jsx

@@ -16,7 +16,7 @@ remote.getCurrentWindow().removeAllListeners('focus');
 
 var config;
 try {
-  var configFile = remote.getGlobal('config-file');
+  const configFile = remote.app.getPath('userData') + '/config.json';
   config = settings.readFileSync(configFile);
 } catch (e) {
   window.location = 'settings.html';

src/browser/settings.jsx

@@ -10,7 +10,7 @@ const React = require('react');
 const ReactDOM = require('react-dom');
 const SettingsPage = require('./components/SettingsPage.jsx');
 
-var configFile = remote.getGlobal('config-file');
+const configFile = remote.app.getPath('userData') + '/config.json';
 
 require('electron-context-menu')({
   window: remote.getCurrentWindow()

src/main.js

@@ -90,16 +90,13 @@ if (argv.hidden) {
   hideOnStartup = true;
 }
 
-// TODO: We should document this if that hasn't been done already
+if (argv['data-dir']) {
-if (argv['config-file']) {
+  app.setPath('userData', path.resolve(argv['data-dir']));
-  global['config-file'] = argv['config-file'];
-} else {
-  global['config-file'] = app.getPath('userData') + '/config.json';
 }
 
 var config = {};
 try {
-  const configFile = global['config-file'];
+  const configFile = app.getPath('userData') + '/config.json';
   config = settings.readFileSync(configFile);
   if (config.version !== settings.version || wasUpdated()) {
     clearAppCache();
@@ -112,7 +109,7 @@ try {
 }
 
 ipcMain.on('update-config', () => {
-  const configFile = global['config-file'];
+  const configFile = app.getPath('userData') + '/config.json';
   config = settings.readFileSync(configFile);
 });
 

test/modules/environment.js

@@ -17,7 +17,8 @@ const electronBinaryPath = (() => {
   const exeExtension = (process.platform === 'win32') ? '.exe' : '';
   return path.join(sourceRootDir, 'node_modules/electron/dist/electron' + exeExtension);
 })();
-const configFilePath = path.join(sourceRootDir, 'test/test_config.json');
+const userDataDir = path.join(sourceRootDir, 'test/testUserData/');
+const configFilePath = path.join(userDataDir, 'config.json');
 const mattermostURL = 'http://example.com/team';
 
 module.exports = {
@@ -27,7 +28,7 @@ module.exports = {
   getSpectronApp() {
     const app = new Application({
       path: electronBinaryPath,
-      args: [`${path.join(sourceRootDir, 'dist')}`, '--config-file=' + configFilePath]
+      args: [`${path.join(sourceRootDir, 'dist')}`, `--data-dir=${userDataDir}`]
     });
     chaiAsPromised.transferPromiseness = app.transferPromiseness;
     return app;