Merge branch 'webpack-auto-config' into 'master'

Automatically Generate Webpack Entry Points

See merge request gitlab-org/gitlab-ce!16865

15 files changed, 73 insertions, 63 deletions

diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index 262ed3783fb..ab28b7d8d44 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -12,9 +12,9 @@ import ShortcutsIssuable from './shortcuts_issuable';
 import Diff from './diff';
 import SearchAutocomplete from './search_autocomplete';
 
-(function() {
-  var Dispatcher;
+var Dispatcher;
 
+(function() {
   Dispatcher = (function() {
     function Dispatcher() {
       this.initSearch();
@@ -49,46 +49,16 @@ import SearchAutocomplete from './search_autocomplete';
       });
 
       switch (page) {
-        case 'sessions:new':
-          import('./pages/sessions/new')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'projects:boards:show':
-        case 'projects:boards:index':
-          import('./pages/projects/boards/index')
-            .then(callDefault)
-            .catch(fail);
-          shortcut_handler = true;
-          break;
         case 'projects:environments:metrics':
           import('./pages/projects/environments/metrics')
             .then(callDefault)
             .catch(fail);
           break;
         case 'projects:merge_requests:index':
-          import('./pages/projects/merge_requests/index')
-            .then(callDefault)
-            .catch(fail);
-          shortcut_handler = true;
-          break;
         case 'projects:issues:index':
-          import('./pages/projects/issues/index')
-            .then(callDefault)
-            .catch(fail);
-          shortcut_handler = true;
-          break;
         case 'projects:issues:show':
-          import('./pages/projects/issues/show')
-            .then(callDefault)
-            .catch(fail);
           shortcut_handler = true;
           break;
-        case 'dashboard:milestones:index':
-          import('./pages/dashboard/milestones/index')
-            .then(callDefault)
-            .catch(fail);
-          break;
         case 'projects:milestones:index':
           import('./pages/projects/milestones/index')
             .then(callDefault)
@@ -318,9 +288,6 @@ import SearchAutocomplete from './search_autocomplete';
           shortcut_handler = true;
           break;
         case 'projects:show':
-          import('./pages/projects/show')
-            .then(callDefault)
-            .catch(fail);
           shortcut_handler = true;
           break;
         case 'projects:edit':
@@ -352,9 +319,6 @@ import SearchAutocomplete from './search_autocomplete';
             .catch(fail);
           break;
         case 'groups:show':
-          import('./pages/groups/show')
-            .then(callDefault)
-            .catch(fail);
           shortcut_handler = true;
           break;
         case 'groups:group_members:index':
@@ -363,7 +327,7 @@ import SearchAutocomplete from './search_autocomplete';
             .catch(fail);
           break;
         case 'projects:project_members:index':
-          import('./pages/projects/project_members/')
+          import('./pages/projects/project_members')
             .then(callDefault)
             .catch(fail);
           break;
@@ -605,7 +569,7 @@ import SearchAutocomplete from './search_autocomplete';
           }
           break;
         case 'profiles':
-          import('./pages/profiles/index/')
+          import('./pages/profiles/index')
             .then(callDefault)
             .catch(fail);
           break;
@@ -662,8 +626,8 @@ import SearchAutocomplete from './search_autocomplete';
 
     return Dispatcher;
   })();
+})();
 
-  $(window).on('load', function() {
-    new Dispatcher();
-  });
-}).call(window);
+export default function initDispatcher() {
+  return new Dispatcher();
+}
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index d8b881a8fac..39445a85c77 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -33,7 +33,7 @@ import './projects_dropdown';
 import './render_gfm';
 import initBreadcrumbs from './breadcrumb';
 
-import './dispatcher';
+import initDispatcher from './dispatcher';
 
 // eslint-disable-next-line global-require, import/no-commonjs
 if (process.env.NODE_ENV !== 'production') require('./test_utils/');
@@ -265,4 +265,6 @@ $(() => {
       removeFlashClickListener(flashEl);
     });
   }
+
+  initDispatcher();
 });
diff --git a/app/assets/javascripts/pages/dashboard/milestones/index/index.js b/app/assets/javascripts/pages/dashboard/milestones/index/index.js
index 0f2f1bd4a25..38ddebe30d9 100644
--- a/app/assets/javascripts/pages/dashboard/milestones/index/index.js
+++ b/app/assets/javascripts/pages/dashboard/milestones/index/index.js
@@ -1,3 +1,3 @@
 import projectSelect from '~/project_select';
 
-export default projectSelect;
+document.addEventListener('DOMContentLoaded', projectSelect);
diff --git a/app/assets/javascripts/pages/groups/show/index.js b/app/assets/javascripts/pages/groups/show/index.js
index 6ed0f010f15..5c763986da3 100644
--- a/app/assets/javascripts/pages/groups/show/index.js
+++ b/app/assets/javascripts/pages/groups/show/index.js
@@ -7,7 +7,7 @@ import ProjectsList from '~/projects_list';
 import ShortcutsNavigation from '~/shortcuts_navigation';
 import initGroupsList from '../../../groups';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   const newGroupChildWrapper = document.querySelector('.js-new-project-subgroup');
   new ShortcutsNavigation();
   new NotificationsForm();
@@ -19,4 +19,4 @@ export default () => {
   }
 
   initGroupsList();
-};
+});
diff --git a/app/assets/javascripts/pages/projects/boards/index.js b/app/assets/javascripts/pages/projects/boards/index.js
index 42c9bb5ec99..3aeeedbb45d 100644
--- a/app/assets/javascripts/pages/projects/boards/index.js
+++ b/app/assets/javascripts/pages/projects/boards/index.js
@@ -1,7 +1,7 @@
 import UsersSelect from '~/users_select';
 import ShortcutsNavigation from '~/shortcuts_navigation';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   new UsersSelect(); // eslint-disable-line no-new
   new ShortcutsNavigation(); // eslint-disable-line no-new
-};
+});
diff --git a/app/assets/javascripts/pages/projects/issues/index/index.js b/app/assets/javascripts/pages/projects/issues/index/index.js
index 0d3f35f044d..39c043edc38 100644
--- a/app/assets/javascripts/pages/projects/issues/index/index.js
+++ b/app/assets/javascripts/pages/projects/issues/index/index.js
@@ -7,10 +7,10 @@ import initFilteredSearch from '~/pages/search/init_filtered_search';
 import { FILTERED_SEARCH } from '~/pages/constants';
 import { ISSUABLE_INDEX } from '~/pages/projects/constants';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   initFilteredSearch(FILTERED_SEARCH.ISSUES);
   new IssuableIndex(ISSUABLE_INDEX.ISSUE);
 
   new ShortcutsNavigation();
   new UsersSelect();
-};
+});
diff --git a/app/assets/javascripts/pages/projects/issues/show/index.js b/app/assets/javascripts/pages/projects/issues/show/index.js
index 48ed8fb2243..da312c1f1b7 100644
--- a/app/assets/javascripts/pages/projects/issues/show/index.js
+++ b/app/assets/javascripts/pages/projects/issues/show/index.js
@@ -1,13 +1,13 @@
-
 /* eslint-disable no-new */
+
 import initIssuableSidebar from '~/init_issuable_sidebar';
 import Issue from '~/issue';
 import ShortcutsIssuable from '~/shortcuts_issuable';
 import ZenMode from '~/zen_mode';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   new Issue();
   new ShortcutsIssuable();
   new ZenMode();
   initIssuableSidebar();
-};
+});
diff --git a/app/assets/javascripts/pages/projects/merge_requests/index/index.js b/app/assets/javascripts/pages/projects/merge_requests/index/index.js
index b386e8fb48d..adadbf28e49 100644
--- a/app/assets/javascripts/pages/projects/merge_requests/index/index.js
+++ b/app/assets/javascripts/pages/projects/merge_requests/index/index.js
@@ -5,9 +5,9 @@ import initFilteredSearch from '~/pages/search/init_filtered_search';
 import { FILTERED_SEARCH } from '~/pages/constants';
 import { ISSUABLE_INDEX } from '~/pages/projects/constants';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   initFilteredSearch(FILTERED_SEARCH.MERGE_REQUESTS);
   new IssuableIndex(ISSUABLE_INDEX.MERGE_REQUEST); // eslint-disable-line no-new
   new ShortcutsNavigation(); // eslint-disable-line no-new
   new UsersSelect(); // eslint-disable-line no-new
-};
+});
diff --git a/app/assets/javascripts/pages/projects/show/index.js b/app/assets/javascripts/pages/projects/show/index.js
index 55154cdddcb..9b87f249f09 100644
--- a/app/assets/javascripts/pages/projects/show/index.js
+++ b/app/assets/javascripts/pages/projects/show/index.js
@@ -8,7 +8,7 @@ import { ajaxGet } from '~/lib/utils/common_utils';
 import Star from '../../../star';
 import notificationsDropdown from '../../../notifications_dropdown';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   new Star(); // eslint-disable-line no-new
   notificationsDropdown();
   new ShortcutsNavigation(); // eslint-disable-line no-new
@@ -24,4 +24,4 @@ export default () => {
   $('#tree-slider').waitForImages(() => {
     ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath);
   });
-};
+});
diff --git a/app/assets/javascripts/pages/sessions/new/index.js b/app/assets/javascripts/pages/sessions/new/index.js
index f163557babc..a0aa0499776 100644
--- a/app/assets/javascripts/pages/sessions/new/index.js
+++ b/app/assets/javascripts/pages/sessions/new/index.js
@@ -2,10 +2,10 @@ import UsernameValidator from './username_validator';
 import SigninTabsMemoizer from './signin_tabs_memoizer';
 import OAuthRememberMe from './oauth_remember_me';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   new UsernameValidator(); // eslint-disable-line no-new
   new SigninTabsMemoizer(); // eslint-disable-line no-new
   new OAuthRememberMe({ // eslint-disable-line no-new
     container: $('.omniauth-container'),
   }).bindEvents();
-};
+});
diff --git a/app/helpers/webpack_helper.rb b/app/helpers/webpack_helper.rb
index 77433acb92a..9d071f2d59a 100644
--- a/app/helpers/webpack_helper.rb
+++ b/app/helpers/webpack_helper.rb
@@ -5,6 +5,24 @@ module WebpackHelper
     javascript_include_tag(*gitlab_webpack_asset_paths(bundle, force_same_domain: force_same_domain))
   end
 
+  def webpack_controller_bundle_tags
+    bundles = []
+    segments = [*controller.controller_path.split('/'), controller.action_name].compact
+
+    until segments.empty?
+      begin
+        asset_paths = gitlab_webpack_asset_paths("pages.#{segments.join('.')}", extension: 'js')
+        bundles.unshift(*asset_paths)
+      rescue Webpack::Rails::Manifest::EntryPointMissingError
+        # no bundle exists for this path
+      end
+
+      segments.pop
+    end
+
+    javascript_include_tag(*bundles)
+  end
+
   # override webpack-rails gem helper until changes can make it upstream
   def gitlab_webpack_asset_paths(source, extension: nil, force_same_domain: false)
     return "" unless source.present?
diff --git a/app/views/layouts/_head.html.haml b/app/views/layouts/_head.html.haml
index 488b706e6a6..0c979109b3f 100644
--- a/app/views/layouts/_head.html.haml
+++ b/app/views/layouts/_head.html.haml
@@ -47,6 +47,8 @@
   - if content_for?(:page_specific_javascripts)
     = yield :page_specific_javascripts
 
+  = webpack_controller_bundle_tags
+
   = yield :project_javascripts
 
   = csrf_meta_tags
diff --git a/config/webpack.config.js b/config/webpack.config.js
index 783677b5b8d..7f3fe551a03 100644
--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -3,6 +3,7 @@
 var crypto = require('crypto');
 var fs = require('fs');
 var path = require('path');
+var glob = require('glob');
 var webpack = require('webpack');
 var StatsWriterPlugin = require('webpack-stats-plugin').StatsWriterPlugin;
 var CopyWebpackPlugin = require('copy-webpack-plugin');
@@ -20,6 +21,26 @@ var DEV_SERVER_LIVERELOAD = process.env.DEV_SERVER_LIVERELOAD !== 'false';
 var WEBPACK_REPORT = process.env.WEBPACK_REPORT;
 var NO_COMPRESSION = process.env.NO_COMPRESSION;
 
+// generate automatic entry points
+var autoEntries = {};
+var pageEntries = glob.sync('pages/**/index.js', { cwd: path.join(ROOT_PATH, 'app/assets/javascripts') });
+
+// filter out entries currently imported dynamically in dispatcher.js
+var dispatcher = fs.readFileSync(path.join(ROOT_PATH, 'app/assets/javascripts/dispatcher.js')).toString();
+var dispatcherChunks = dispatcher.match(/(?!import\('.\/)pages\/[^']+/g);
+
+pageEntries.forEach(( path ) => {
+  let chunkPath = path.replace(/\/index\.js$/, '');
+  if (!dispatcherChunks.includes(chunkPath)) {
+    let chunkName = chunkPath.replace(/\//g, '.');
+    autoEntries[chunkName] = './' + path;
+  }
+});
+
+// report our auto-generated bundle count
+var autoEntriesCount = Object.keys(autoEntries).length;
+console.log(`${autoEntriesCount} entries from '/pages' automatically added to webpack output.`);
+
 var config = {
   // because sqljs requires fs.
   node: {
@@ -301,6 +322,8 @@ var config = {
   }
 }
 
+config.entry = Object.assign({}, autoEntries, config.entry);
+
 if (IS_PRODUCTION) {
   config.devtool = 'source-map';
   config.plugins.push(
diff --git a/package.json b/package.json
index c68cf648932..26908e9f905 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "private": true,
   "scripts": {
-    "dev-server": "nodemon --watch config/webpack.config.js -- ./node_modules/.bin/webpack-dev-server --config config/webpack.config.js",
+    "dev-server": "nodemon -w 'config/webpack.config.js' -w 'app/assets/javascripts/dispatcher.js' -w 'app/assets/javascripts/pages/**/index.js' --exec 'webpack-dev-server --config config/webpack.config.js'",
     "eslint": "eslint --max-warnings 0 --ext .js,.vue .",
     "eslint-fix": "eslint --max-warnings 0 --ext .js,.vue --fix .",
     "eslint-report": "eslint --max-warnings 0 --ext .js,.vue --format html --output-file ./eslint-report.html .",
@@ -47,6 +47,7 @@
     "exports-loader": "^0.6.4",
     "file-loader": "^0.11.1",
     "fuzzaldrin-plus": "^0.5.0",
+    "glob": "^7.1.2",
     "imports-loader": "^0.7.1",
     "jed": "^1.1.1",
     "jquery": "^2.2.4",
diff --git a/yarn.lock b/yarn.lock
index d10a4372a40..e6d5f239d83 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3322,7 +3322,7 @@ glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.1.0, glob@~7.1.2:
+glob@^7.1.0, glob@^7.1.2, glob@~7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies: