Fix after review

Adds require statement

app/assets/javascripts/dispatcher.js.es6

@@ -135,8 +135,18 @@
             new TreeView();
           }
           break;
+        case 'projects:pipelines:builds':
         case 'projects:pipelines:show':
-          new gl.Pipelines();
+          const controllerAction = document.querySelector('.js-pipeline-container').dataset.controllerAction;
+
+          new gl.Pipelines({
+            initTabs: true,
+            tabsOptions: {
+              action: controllerAction,
+              defaultAction: 'pipelines',
+              parentEl: '.pipelines-tabs',
+            },
+          });
           break;
         case 'groups:activity':
           new gl.Activities();

app/assets/javascripts/pipelines.js.es6

+//= require lib/utils/bootstrap_linked_tabs
+
 /* eslint-disable */
 ((global) => {
 
   class Pipelines {
-    constructor() {
+    constructor(options) {
+
+      if (options.initTabs && options.tabsOptions) {
+        new window.gl.LinkedTabs(options.tabsOptions);
+      }
+
       this.addMarginToBuildColumns();
     }
 

app/views/projects/pipelines/_with_tabs.html.haml

@@ -52,13 +52,3 @@
             %th
         - pipeline.statuses.relevant.stages.each do |stage|
           = render 'projects/commit/ci_stage', stage: stage, statuses: pipeline.statuses.relevant.where(stage: stage)
-
-
-:javascript
-  var pipelines_tab;
-
-  pipelines_tab = new window.gl.LinkedTabs({
-    action: "#{controller.action_name}",
-    defaultAction: 'pipelines',
-    parentEl: '.pipelines-tabs'
-  });

app/views/projects/pipelines/show.html.haml

@@ -2,7 +2,7 @@
 - page_title "Pipeline"
 = render "projects/pipelines/head"
 
-%div{ class: container_class }
+%div.js-pipeline-container{ class: container_class, data: {controller_action: "#{controller.action_name}"} }
   - if @commit
     = render "projects/pipelines/info"