Upgrade webpack to version v4.x (#6655)

app/javascript/mastodon/common.js

@@ -0,0 +1,8 @@
+import Rails from 'rails-ujs';
+
+export function start() {
+  require('font-awesome/css/font-awesome.css');
+  require.context('../images/', true);
+
+  Rails.start();
+};

app/javascript/packs/about.js

@@ -1,4 +1,7 @@
 import loadPolyfills from '../mastodon/load_polyfills';
+import { start } from '../mastodon/common';
+
+start();
 
 function loaded() {
   const TimelineContainer = require('../mastodon/containers/timeline_container').default;

app/javascript/packs/admin.js

@@ -1,4 +1,7 @@
 import { delegate } from 'rails-ujs';
+import { start } from '../mastodon/common';
+
+start();
 
 function handleDeleteStatus(event) {
   const [data] = event.detail;

app/javascript/packs/application.js

@@ -1,4 +1,7 @@
 import loadPolyfills from '../mastodon/load_polyfills';
+import { start } from '../mastodon/common';
+
+start();
 
 loadPolyfills().then(() => {
   require('../mastodon/main').default();

app/javascript/packs/common.js

@@ -1,6 +0,0 @@
-import { start } from 'rails-ujs';
-import 'font-awesome/css/font-awesome.css';
-
-require.context('../images/', true);
-
-start();

app/javascript/packs/public.js

@@ -1,5 +1,8 @@
 import loadPolyfills from '../mastodon/load_polyfills';
 import ready from '../mastodon/ready';
+import { start } from '../mastodon/common';
+
+start();
 
 window.addEventListener('message', e => {
   const data = e.data || {};

app/javascript/packs/share.js

@@ -1,4 +1,7 @@
 import loadPolyfills from '../mastodon/load_polyfills';
+import { start } from '../mastodon/common';
+
+start();
 
 function loaded() {
   const ComposeContainer = require('../mastodon/containers/compose_container').default;