Merge branch '24814-pipeline-tabs' into 'master'

Pipelines tabs

## What does this MR do?
Changes the URL when the builds tab is clicked making it possible to be shared.

1. Adds a standard way to handle linked tabs:
    *   This behaviour is already present in the merge requests, commit and user `show` page. 
    *    This MR introduces a reusable way to accomplish this behaviour for pages with static content.

2. Adds test:
    *   For the linked tabs reusable class
    *  For the pipelines tabs

## Why was this MR needed?
To allow having a sharable URL that represented the opened tab

![tabs](/uploads/91e663c12c6e9ac46a17aa3a9489dc72/tabs.gif)

## Does this MR meet the acceptance criteria?
- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #24814

See merge request !7709

13 files changed, 393 insertions, 73 deletions

diff --git a/app/assets/javascripts/dispatcher.js.es6 b/app/assets/javascripts/dispatcher.js.es6
index 147634f1cc4..ab521c6c1fc 100644
--- a/app/assets/javascripts/dispatcher.js.es6
+++ b/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;
+
+          new gl.Pipelines({
+            initTabs: true,
+            tabsOptions: {
+              action: controllerAction,
+              defaultAction: 'pipelines',
+              parentEl: '.pipelines-tabs',
+            },
+          });
           break;
         case 'groups:activity':
           new gl.Activities();
diff --git a/app/assets/javascripts/extensions/element.js.es6 b/app/assets/javascripts/extensions/element.js.es6
index 6d9b0c4bc3e..3f12ad9ff9f 100644
--- a/app/assets/javascripts/extensions/element.js.es6
+++ b/app/assets/javascripts/extensions/element.js.es6
@@ -1,9 +1,20 @@
 /* global Element */
-/* eslint-disable consistent-return, max-len */
-
-Element.prototype.matches = Element.prototype.matches || Element.prototype.msMatchesSelector;
+/* eslint-disable consistent-return, max-len, no-empty, no-plusplus, func-names */
 
 Element.prototype.closest = Element.prototype.closest || function closest(selector, selectedElement = this) {
   if (!selectedElement) return;
   return selectedElement.matches(selector) ? selectedElement : Element.prototype.closest(selector, selectedElement.parentElement);
 };
+
+Element.prototype.matches = Element.prototype.matches ||
+  Element.prototype.matchesSelector ||
+  Element.prototype.mozMatchesSelector ||
+  Element.prototype.msMatchesSelector ||
+  Element.prototype.oMatchesSelector ||
+  Element.prototype.webkitMatchesSelector ||
+  function (s) {
+    const matches = (this.document || this.ownerDocument).querySelectorAll(s);
+    let i = matches.length;
+    while (--i >= 0 && matches.item(i) !== this) {}
+    return i > -1;
+  };
diff --git a/app/assets/javascripts/lib/utils/bootstrap_linked_tabs.js.es6 b/app/assets/javascripts/lib/utils/bootstrap_linked_tabs.js.es6
new file mode 100644
index 00000000000..e810ee85bd3
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/bootstrap_linked_tabs.js.es6
@@ -0,0 +1,113 @@
+/**
+ * Linked Tabs
+ *
+ * Handles persisting and restores the current tab selection and content.
+ * Reusable component for static content.
+ *
+ * ### Example Markup
+ *
+ *  <ul class="nav-links tab-links">
+ *    <li class="active">
+ *      <a data-action="tab1" data-target="#tab1" data-toggle="tab" href="/path/tab1">
+ *        Tab 1
+ *      </a>
+ *    </li>
+ *    <li class="groups-tab">
+ *      <a data-action="tab2" data-target="#tab2" data-toggle="tab" href="/path/tab2">
+ *        Tab 2
+ *      </a>
+ *    </li>
+ *
+ *
+ *  <div class="tab-content">
+ *    <div class="tab-pane" id="tab1">
+ *      Tab 1 Content
+ *    </div>
+ *    <div class="tab-pane" id="tab2">
+ *      Tab 2 Content
+ *    </div>
+ * </div>
+ *
+ *
+ * ### How to use
+ *
+ *  new window.gl.LinkedTabs({
+ *    action: "#{controller.action_name}",
+ *    defaultAction: 'tab1',
+ *    parentEl: '.tab-links'
+ *  });
+ */
+
+(() => {
+  window.gl = window.gl || {};
+
+  window.gl.LinkedTabs = class LinkedTabs {
+    /**
+     * Binds the events and activates de default tab.
+     *
+     * @param  {Object} options
+     */
+    constructor(options) {
+      this.options = options || {};
+
+      this.defaultAction = this.options.defaultAction;
+      this.action = this.options.action || this.defaultAction;
+
+      if (this.action === 'show') {
+        this.action = this.defaultAction;
+      }
+
+      this.currentLocation = window.location;
+
+      const tabSelector = `${this.options.parentEl} a[data-toggle="tab"]`;
+
+      // since this is a custom event we need jQuery :(
+      $(document)
+        .off('shown.bs.tab', tabSelector)
+        .on('shown.bs.tab', tabSelector, e => this.tabShown(e));
+
+      this.activateTab(this.action);
+    }
+
+    /**
+     * Handles the `shown.bs.tab` event to set the currect url action.
+     *
+     * @param  {type} evt
+     * @return {Function}
+     */
+    tabShown(evt) {
+      const source = evt.target.getAttribute('href');
+
+      return this.setCurrentAction(source);
+    }
+
+    /**
+     * Updates the URL with the path that matched the given action.
+     *
+     * @param  {String} source
+     * @return {String}
+     */
+    setCurrentAction(source) {
+      const copySource = source;
+
+      copySource.replace(/\/+$/, '');
+
+      const newState = `${copySource}${this.currentLocation.search}${this.currentLocation.hash}`;
+
+      history.replaceState({
+        turbolinks: true,
+        url: newState,
+      }, document.title, newState);
+      return newState;
+    }
+
+    /**
+     * Given the current action activates the correct tab.
+     * http://getbootstrap.com/javascript/#tab-show
+     * Note: Will trigger `shown.bs.tab`
+     */
+    activateTab() {
+      return $(`${this.options.parentEl} a[data-action='${this.action}']`).tab('show');
+    }
+  };
+})();
diff --git a/app/assets/javascripts/pipelines.js.es6 b/app/assets/javascripts/pipelines.js.es6
index a84db9c0233..72c6c4a1fcd 100644
--- a/app/assets/javascripts/pipelines.js.es6
+++ b/app/assets/javascripts/pipelines.js.es6
@@ -1,8 +1,15 @@
+//= require lib/utils/bootstrap_linked_tabs
+
 /* eslint-disable */
 ((global) => {
 
   class Pipelines {
-    constructor() {
+    constructor(options) {
+
+      if (options.initTabs && options.tabsOptions) {
+        new global.LinkedTabs(options.tabsOptions);
+      }
+
       this.addMarginToBuildColumns();
     }
 
diff --git a/app/controllers/projects/pipelines_controller.rb b/app/controllers/projects/pipelines_controller.rb
index 533af80aee0..85188cfdd4c 100644
--- a/app/controllers/projects/pipelines_controller.rb
+++ b/app/controllers/projects/pipelines_controller.rb
@@ -1,6 +1,6 @@
 class Projects::PipelinesController < Projects::ApplicationController
   before_action :pipeline, except: [:index, :new, :create]
-  before_action :commit, only: [:show]
+  before_action :commit, only: [:show, :builds]
   before_action :authorize_read_pipeline!
   before_action :authorize_create_pipeline!, only: [:new, :create]
   before_action :authorize_update_pipeline!, only: [:retry, :cancel]
@@ -32,6 +32,14 @@ class Projects::PipelinesController < Projects::ApplicationController
   def show
   end
 
+  def builds
+    respond_to do |format|
+      format.html do
+        render 'show'
+      end
+    end
+  end
+
   def retry
     pipeline.retry_failed(current_user)
 
diff --git a/app/views/projects/pipelines/_with_tabs.html.haml b/app/views/projects/pipelines/_with_tabs.html.haml
index 718314701f9..3464e155a1b 100644
--- a/app/views/projects/pipelines/_with_tabs.html.haml
+++ b/app/views/projects/pipelines/_with_tabs.html.haml
@@ -1,14 +1,17 @@
 .tabs-holder
-  %ul.nav-links.no-top.no-bottom
-    %li.active
-      = link_to "Pipeline", "#js-tab-pipeline", data: { target: '#js-tab-pipeline', action: 'pipeline', toggle: 'tab' }, class: 'pipeline-tab'
-    %li
-      = link_to "#js-tab-builds", data: { target: '#js-tab-builds', action: 'build', toggle: 'tab' }, class: 'builds-tab' do
+  %ul.pipelines-tabs.nav-links.no-top.no-bottom
+    %li.js-pipeline-tab-link
+      = link_to namespace_project_pipeline_path(@project.namespace, @project, @pipeline), data: { target: 'div#js-tab-pipeline', action: 'pipelines', toggle: 'tab' },  class: 'pipeline-tab' do
+        Pipeline
+    %li.js-builds-tab-link
+      = link_to builds_namespace_project_pipeline_path(@project.namespace, @project, @pipeline), data: {target: 'div#js-tab-builds', action: 'builds', toggle: 'tab' }, class: 'builds-tab' do
         Builds
-        %span.badge= pipeline.statuses.count
+        %span.badge.js-builds-counter= pipeline.statuses.count
+
+
 
 .tab-content
-  #js-tab-pipeline.tab-pane.active
+  #js-tab-pipeline.tab-pane
     .build-content.middle-block.pipeline-graph
       .pipeline-visualization
         %ul.stage-column-list
diff --git a/app/views/projects/pipelines/show.html.haml b/app/views/projects/pipelines/show.html.haml
index 8c6652a5f90..29a41bc664b 100644
--- a/app/views/projects/pipelines/show.html.haml
+++ b/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"
 
diff --git a/changelogs/unreleased/24814-pipeline-tabs.yml b/changelogs/unreleased/24814-pipeline-tabs.yml
new file mode 100644
index 00000000000..f85e7576905
--- /dev/null
+++ b/changelogs/unreleased/24814-pipeline-tabs.yml
@@ -0,0 +1,4 @@
+---
+title: Fix Cicking on tabs on pipeline page should set URL
+merge_request: 7709
+author:
diff --git a/config/routes/project.rb b/config/routes/project.rb
index 1336484a399..0754f0ec3b0 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -129,6 +129,7 @@ constraints(ProjectUrlConstrainer.new) do
         member do
           post :cancel
           post :retry
+          get :builds
         end
       end
 
diff --git a/spec/features/projects/pipelines/pipeline_spec.rb b/spec/features/projects/pipelines/pipeline_spec.rb
new file mode 100644
index 00000000000..3350a3aeefc
--- /dev/null
+++ b/spec/features/projects/pipelines/pipeline_spec.rb
@@ -0,0 +1,154 @@
+require 'spec_helper'
+
+describe "Pipelines", feature: true, js: true do
+  include GitlabRoutingHelper
+
+  let(:project) { create(:empty_project) }
+  let(:user) { create(:user) }
+
+  before do
+    login_as(user)
+    project.team << [user, :developer]
+  end
+
+  describe 'GET /:project/pipelines/:id' do
+    let(:project) { create(:project) }
+    let(:pipeline) { create(:ci_pipeline, project: project, ref: 'master', sha: project.commit.id) }
+
+    before do
+      @success = create(:ci_build, :success, pipeline: pipeline, stage: 'build', name: 'build')
+      @failed = create(:ci_build, :failed, pipeline: pipeline, stage: 'test', name: 'test', commands: 'test')
+      @running = create(:ci_build, :running, pipeline: pipeline, stage: 'deploy', name: 'deploy')
+      @manual = create(:ci_build, :manual, pipeline: pipeline, stage: 'deploy', name: 'manual build')
+      @external = create(:generic_commit_status, status: 'success', pipeline: pipeline, name: 'jenkins', stage: 'external')
+    end
+
+    before { visit namespace_project_pipeline_path(project.namespace, project, pipeline) }
+
+    it 'shows the pipeline graph' do
+      expect(page).to have_selector('.pipeline-visualization')
+      expect(page).to have_content('Build')
+      expect(page).to have_content('Test')
+      expect(page).to have_content('Deploy')
+      expect(page).to have_content('Retry failed')
+      expect(page).to have_content('Cancel running')
+    end
+
+    it 'shows Pipeline tab pane as active' do
+      expect(page).to have_css('#js-tab-pipeline.active')
+    end
+
+    context 'page tabs' do
+      it 'shows Pipeline and Builds tabs with link' do
+        expect(page).to have_link('Pipeline')
+        expect(page).to have_link('Builds')
+      end
+
+      it 'shows counter in Builds tab' do
+        expect(page.find('.js-builds-counter').text).to eq(pipeline.statuses.count.to_s)
+      end
+
+      it 'shows Pipeline tab as active' do
+        expect(page).to have_css('.js-pipeline-tab-link.active')
+      end
+    end
+
+    context 'retrying builds' do
+      it { expect(page).not_to have_content('retried') }
+
+      context 'when retrying' do
+        before { click_on 'Retry failed' }
+
+        it { expect(page).not_to have_content('Retry failed') }
+      end
+    end
+
+    context 'canceling builds' do
+      it { expect(page).not_to have_selector('.ci-canceled') }
+
+      context 'when canceling' do
+        before { click_on 'Cancel running' }
+
+        it { expect(page).not_to have_content('Cancel running') }
+      end
+    end
+  end
+
+  describe 'GET /:project/pipelines/:id/builds' do
+    let(:project) { create(:project) }
+    let(:pipeline) { create(:ci_pipeline, project: project, ref: 'master', sha: project.commit.id) }
+
+    before do
+      @success = create(:ci_build, :success, pipeline: pipeline, stage: 'build', name: 'build')
+      @failed = create(:ci_build, :failed, pipeline: pipeline, stage: 'test', name: 'test', commands: 'test')
+      @running = create(:ci_build, :running, pipeline: pipeline, stage: 'deploy', name: 'deploy')
+      @manual = create(:ci_build, :manual, pipeline: pipeline, stage: 'deploy', name: 'manual build')
+      @external = create(:generic_commit_status, status: 'success', pipeline: pipeline, name: 'jenkins', stage: 'external')
+    end
+
+    before { visit builds_namespace_project_pipeline_path(project.namespace, project, pipeline)}
+
+    it 'shows a list of builds' do
+      expect(page).to have_content('Test')
+      expect(page).to have_content(@success.id)
+      expect(page).to have_content('Deploy')
+      expect(page).to have_content(@failed.id)
+      expect(page).to have_content(@running.id)
+      expect(page).to have_content(@external.id)
+      expect(page).to have_content('Retry failed')
+      expect(page).to have_content('Cancel running')
+      expect(page).to have_link('Play')
+    end
+
+    it 'shows Builds tab pane as active' do
+      expect(page).to have_css('#js-tab-builds.active')
+    end
+
+    context 'page tabs' do
+      it 'shows Pipeline and Builds tabs with link' do
+        expect(page).to have_link('Pipeline')
+        expect(page).to have_link('Builds')
+      end
+
+      it 'shows counter in Builds tab' do
+        expect(page.find('.js-builds-counter').text).to eq(pipeline.statuses.count.to_s)
+      end
+
+      it 'shows Builds tab as active' do
+        expect(page).to have_css('li.js-builds-tab-link.active')
+      end
+    end
+
+    context 'retrying builds' do
+      it { expect(page).not_to have_content('retried') }
+
+      context 'when retrying' do
+        before { click_on 'Retry failed' }
+
+        it { expect(page).not_to have_content('Retry failed') }
+        it { expect(page).to have_selector('.retried') }
+      end
+    end
+
+    context 'canceling builds' do
+      it { expect(page).not_to have_selector('.ci-canceled') }
+
+      context 'when canceling' do
+        before { click_on 'Cancel running' }
+
+        it { expect(page).not_to have_content('Cancel running') }
+        it { expect(page).to have_selector('.ci-canceled') }
+      end
+    end
+
+    context 'playing manual build' do
+      before do
+        within '.pipeline-holder' do
+          click_link('Play')
+        end
+      end
+
+      it { expect(@manual.reload).to be_pending }
+    end
+  end
+end
diff --git a/spec/features/projects/pipelines_spec.rb b/spec/features/projects/pipelines/pipelines_spec.rb
index 10e5466fc85..f3731698a18 100644
--- a/spec/features/projects/pipelines_spec.rb
+++ b/spec/features/projects/pipelines/pipelines_spec.rb
@@ -152,65 +152,6 @@ describe "Pipelines" do
     end
   end
 
-  describe 'GET /:project/pipelines/:id' do
-    let(:project) { create(:project) }
-    let(:pipeline) { create(:ci_pipeline, project: project, ref: 'master', sha: project.commit.id) }
-
-    before do
-      @success = create(:ci_build, :success, pipeline: pipeline, stage: 'build', name: 'build')
-      @failed = create(:ci_build, :failed, pipeline: pipeline, stage: 'test', name: 'test', commands: 'test')
-      @running = create(:ci_build, :running, pipeline: pipeline, stage: 'deploy', name: 'deploy')
-      @manual = create(:ci_build, :manual, pipeline: pipeline, stage: 'deploy', name: 'manual build')
-      @external = create(:generic_commit_status, status: 'success', pipeline: pipeline, name: 'jenkins', stage: 'external')
-    end
-
-    before { visit namespace_project_pipeline_path(project.namespace, project, pipeline) }
-
-    it 'shows a list of builds' do
-      expect(page).to have_content('Test')
-      expect(page).to have_content(@success.id)
-      expect(page).to have_content('Deploy')
-      expect(page).to have_content(@failed.id)
-      expect(page).to have_content(@running.id)
-      expect(page).to have_content(@external.id)
-      expect(page).to have_content('Retry failed')
-      expect(page).to have_content('Cancel running')
-      expect(page).to have_link('Play')
-    end
-
-    context 'retrying builds' do
-      it { expect(page).not_to have_content('retried') }
-
-      context 'when retrying' do
-        before { click_on 'Retry failed' }
-
-        it { expect(page).not_to have_content('Retry failed') }
-        it { expect(page).to have_selector('.retried') }
-      end
-    end
-
-    context 'canceling builds' do
-      it { expect(page).not_to have_selector('.ci-canceled') }
-
-      context 'when canceling' do
-        before { click_on 'Cancel running' }
-
-        it { expect(page).not_to have_content('Cancel running') }
-        it { expect(page).to have_selector('.ci-canceled') }
-      end
-    end
-
-    context 'playing manual build' do
-      before do
-        within '.pipeline-holder' do
-          click_link('Play')
-        end
-      end
-
-      it { expect(@manual.reload).to be_pending }
-    end
-  end
-
   describe 'POST /:project/pipelines' do
     let(:project) { create(:project) }
 
diff --git a/spec/javascripts/bootstrap_linked_tabs_spec.js.es6 b/spec/javascripts/bootstrap_linked_tabs_spec.js.es6
new file mode 100644
index 00000000000..9aa3c50611d
--- /dev/null
+++ b/spec/javascripts/bootstrap_linked_tabs_spec.js.es6
@@ -0,0 +1,55 @@
+//= require lib/utils/bootstrap_linked_tabs
+
+(() => {
+  describe('Linked Tabs', () => {
+    fixture.preload('linked_tabs');
+
+    beforeEach(() => {
+      fixture.load('linked_tabs');
+    });
+
+    describe('when is initialized', () => {
+      it('should activate the tab correspondent to the given action', () => {
+        const linkedTabs = new window.gl.LinkedTabs({ // eslint-disable-line
+          action: 'tab1',
+          defaultAction: 'tab1',
+          parentEl: '.linked-tabs',
+        });
+
+        expect(document.querySelector('#tab1').classList).toContain('active');
+      });
+
+      it('should active the default tab action when the action is show', () => {
+        const linkedTabs = new window.gl.LinkedTabs({ // eslint-disable-line
+          action: 'show',
+          defaultAction: 'tab1',
+          parentEl: '.linked-tabs',
+        });
+
+        expect(document.querySelector('#tab1').classList).toContain('active');
+      });
+    });
+
+    describe('on click', () => {
+      it('should change the url according to the clicked tab', () => {
+        const historySpy = spyOn(history, 'replaceState').and.callFake(() => {});
+
+        const linkedTabs = new window.gl.LinkedTabs({ // eslint-disable-line
+          action: 'show',
+          defaultAction: 'tab1',
+          parentEl: '.linked-tabs',
+        });
+
+        const secondTab = document.querySelector('.linked-tabs li:nth-child(2) a');
+        const newState = secondTab.getAttribute('href') + linkedTabs.currentLocation.search + linkedTabs.currentLocation.hash;
+
+        secondTab.click();
+
+        expect(historySpy).toHaveBeenCalledWith({
+          turbolinks: true,
+          url: newState,
+        }, document.title, newState);
+      });
+    });
+  });
+})();
diff --git a/spec/javascripts/fixtures/linked_tabs.html.haml b/spec/javascripts/fixtures/linked_tabs.html.haml
new file mode 100644
index 00000000000..93c0cf97ff0
--- /dev/null
+++ b/spec/javascripts/fixtures/linked_tabs.html.haml
@@ -0,0 +1,13 @@
+%ul.nav.nav-tabs.linked-tabs
+  %li
+    %a{ href: 'foo/bar/1', data: { target: 'div#tab1', action: 'tab1', toggle: 'tab' } }
+      Tab 1
+  %li
+    %a{ href: 'foo/bar/1/context', data: { target: 'div#tab2', action: 'tab2', toggle: 'tab' } }
+      Tab 2
+
+.tab-content
+  #tab1.tab-pane
+    Tab 1 Content
+  #tab2.tab-pane
+    Tab 2 Content