Merge branch '18681-pipelines-merge-request' into 'master'

Resolve "Pipelines for merge request"

## What does this MR do?
Adds `Pipelines` tab in merge request view

## What are the relevant issue numbers?
Closes #18681 

## Screenshots (if relevant)
![Screen_Shot_2016-08-16_at_3.22.41_PM](/uploads/c04febab3765b1fac2bf3bbfb9882f9f/Screen_Shot_2016-08-16_at_3.22.41_PM.png)

See merge request !5485

15 files changed, 205 insertions, 27 deletions

diff --git a/app/assets/javascripts/merge_request_tabs.js b/app/assets/javascripts/merge_request_tabs.js
index 52c2ed61012..1bba69a255a 100644
--- a/app/assets/javascripts/merge_request_tabs.js
+++ b/app/assets/javascripts/merge_request_tabs.js
@@ -9,6 +9,8 @@
 
     MergeRequestTabs.prototype.buildsLoaded = false;
 
+    MergeRequestTabs.prototype.pipelinesLoaded = false;
+
     MergeRequestTabs.prototype.commitsLoaded = false;
 
     function MergeRequestTabs(opts) {
@@ -50,6 +52,9 @@
       } else if (action === 'builds') {
         this.loadBuilds($target.attr('href'));
         this.expandView();
+      } else if (action === 'pipelines') {
+        this.loadPipelines($target.attr('href'));
+        this.expandView();
       } else {
         this.expandView();
       }
@@ -81,7 +86,7 @@
       if (action === 'show') {
         action = 'notes';
       }
-      new_state = this._location.pathname.replace(/\/(commits|diffs|builds)(\.html)?\/?$/, '');
+      new_state = this._location.pathname.replace(/\/(commits|diffs|builds|pipelines)(\.html)?\/?$/, '');
       if (action !== 'notes') {
         new_state += "/" + action;
       }
@@ -177,6 +182,21 @@
       });
     };
 
+    MergeRequestTabs.prototype.loadPipelines = function(source) {
+      if (this.pipelinesLoaded) {
+        return;
+      }
+      return this._get({
+        url: source + ".json",
+        success: function(data) {
+          $('#pipelines').html(data.html);
+          gl.utils.localTimeAgo($('.js-timeago', '#pipelines'));
+          this.pipelinesLoaded = true;
+          return this.scrollToElement("#pipelines");
+        }.bind(this)
+      });
+    };
+
     MergeRequestTabs.prototype.toggleLoading = function(status) {
       return $('.mr-loading-status .loading').toggle(status);
     };
diff --git a/app/assets/javascripts/merge_request_widget.js b/app/assets/javascripts/merge_request_widget.js
index 362aaa906d0..659bd37c388 100644
--- a/app/assets/javascripts/merge_request_widget.js
+++ b/app/assets/javascripts/merge_request_widget.js
@@ -28,7 +28,7 @@
 
     MergeRequestWidget.prototype.addEventListeners = function() {
       var allowedPages;
-      allowedPages = ['show', 'commits', 'builds', 'changes'];
+      allowedPages = ['show', 'commits', 'builds', 'pipelines', 'changes'];
       return $(document).on('page:change.merge_request', (function(_this) {
         return function() {
           var page;
diff --git a/app/assets/stylesheets/pages/pipelines.scss b/app/assets/stylesheets/pages/pipelines.scss
index 21919fe4d73..50ac4d8449b 100644
--- a/app/assets/stylesheets/pages/pipelines.scss
+++ b/app/assets/stylesheets/pages/pipelines.scss
@@ -229,3 +229,15 @@
     box-shadow: none;
   }
 }
+
+.pipelines.tab-pane {
+
+  .content-list.pipelines {
+    overflow: scroll;
+  }
+
+  .stage {
+    max-width: 60px;
+    width: 60px;
+  }
+}
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index 7ca2dd2276a..7f331ba1dcd 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -9,15 +9,15 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
   before_action :module_enabled
   before_action :merge_request, only: [
-    :edit, :update, :show, :diffs, :commits, :builds, :merge, :merge_check,
+    :edit, :update, :show, :diffs, :commits, :builds, :pipelines, :merge, :merge_check,
     :ci_status, :toggle_subscription, :cancel_merge_when_build_succeeds, :remove_wip
   ]
-  before_action :validates_merge_request, only: [:show, :diffs, :commits, :builds]
-  before_action :define_show_vars, only: [:show, :diffs, :commits, :builds]
+  before_action :validates_merge_request, only: [:show, :diffs, :commits, :builds, :pipelines]
+  before_action :define_show_vars, only: [:show, :diffs, :commits, :builds, :pipelines]
   before_action :define_widget_vars, only: [:merge, :cancel_merge_when_build_succeeds, :merge_check]
   before_action :define_commit_vars, only: [:diffs]
   before_action :define_diff_comment_vars, only: [:diffs]
-  before_action :ensure_ref_fetched, only: [:show, :diffs, :commits, :builds]
+  before_action :ensure_ref_fetched, only: [:show, :diffs, :commits, :builds, :pipelines]
 
   # Allow read any merge_request
   before_action :authorize_read_merge_request!
@@ -141,6 +141,19 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     end
   end
 
+  def pipelines
+    @pipelines = @merge_request.all_pipelines
+
+    respond_to do |format|
+      format.html do
+        define_discussion_vars
+
+        render 'show'
+      end
+      format.json { render json: { html: view_to_html_string('projects/merge_requests/show/_pipelines') } }
+    end
+  end
+
   def new
     apply_diff_view_cookie!
 
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index fe799382fd0..d6a6a9a11ae 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -674,10 +674,21 @@ class MergeRequest < ActiveRecord::Base
     diverged_commits_count > 0
   end
 
+  def commits_sha
+    commits.map(&:sha)
+  end
+
   def pipeline
     @pipeline ||= source_project.pipeline(diff_head_sha, source_branch) if diff_head_sha && source_project
   end
 
+  def all_pipelines
+    @all_pipelines ||=
+      if diff_head_sha && source_project
+        source_project.pipelines.order(id: :desc).where(sha: commits_sha, ref: source_branch)
+      end
+  end
+
   def merge_commit
     @merge_commit ||= project.commit(merge_commit_sha) if merge_commit_sha
   end
diff --git a/app/views/projects/ci/pipelines/_pipeline.html.haml b/app/views/projects/ci/pipelines/_pipeline.html.haml
index 78709a92aed..be387201f8d 100644
--- a/app/views/projects/ci/pipelines/_pipeline.html.haml
+++ b/app/views/projects/ci/pipelines/_pipeline.html.haml
@@ -2,19 +2,21 @@
 %tr.commit
   %td.commit-link
     = link_to namespace_project_pipeline_path(@project.namespace, @project, pipeline.id) do
-      = ci_status_with_icon(status)
-
-
+      - if defined?(status_icon_only) && status_icon_only
+        = ci_icon_for_status(status)
+      - else
+        = ci_status_with_icon(status)
   %td
     .branch-commit
       = link_to namespace_project_pipeline_path(@project.namespace, @project, pipeline.id) do
         %span ##{pipeline.id}
       - if pipeline.ref
-        .icon-container
-          = pipeline.tag? ? icon('tag') : icon('code-fork')
-        = link_to pipeline.ref, namespace_project_commits_path(@project.namespace, @project, pipeline.ref), class: "monospace branch-name"
-        .icon-container
-          = custom_icon("icon_commit")
+        - unless defined?(hide_branch) && hide_branch
+          .icon-container
+            = pipeline.tag? ? icon('tag') : icon('code-fork')
+          = link_to pipeline.ref, namespace_project_commits_path(@project.namespace, @project, pipeline.ref), class: "monospace branch-name"
+      .icon-container
+        = custom_icon("icon_commit")
       = link_to pipeline.short_sha, namespace_project_commit_path(@project.namespace, @project, pipeline.sha), class: "commit-id monospace"
       - if pipeline.latest?
         %span.label.label-success.has-tooltip{ title: 'Latest build for this branch' } latest
@@ -53,7 +55,7 @@
     - if pipeline.finished_at
       %p.finished-at
         = icon("calendar")
-        #{time_ago_with_tooltip(pipeline.finished_at, short_format: true, skip_js: true)}
+        #{time_ago_with_tooltip(pipeline.finished_at, short_format: false, skip_js: true)}
 
   %td.pipeline-actions
     .controls.hidden-xs.pull-right
diff --git a/app/views/projects/commit/_pipelines_list.haml b/app/views/projects/commit/_pipelines_list.haml
new file mode 100644
index 00000000000..29f4ef8f49e
--- /dev/null
+++ b/app/views/projects/commit/_pipelines_list.haml
@@ -0,0 +1,17 @@
+%ul.content-list.pipelines
+  - if pipelines.blank?
+    %li
+      .nothing-here-block No pipelines to show
+  - else
+    .table-holder
+      %table.table.builds
+        %tbody
+          %th Status
+          %th Commit
+          - pipelines.stages.each do |stage|
+            %th.stage
+              %span.has-tooltip{ title: "#{stage.titleize}" }
+                = stage.titleize
+          %th
+          %th
+        = render pipelines, commit_sha: true, stage: true, allow_retry: true, stages: pipelines.stages, status_icon_only: true, hide_branch: true
diff --git a/app/views/projects/merge_requests/_show.html.haml b/app/views/projects/merge_requests/_show.html.haml
index 269198adf91..a1313064725 100644
--- a/app/views/projects/merge_requests/_show.html.haml
+++ b/app/views/projects/merge_requests/_show.html.haml
@@ -45,20 +45,24 @@
     - if @commits_count.nonzero?
       %ul.merge-request-tabs.nav-links.no-top.no-bottom
         %li.notes-tab
-          = link_to namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: {target: 'div#notes', action: 'notes', toggle: 'tab'} do
+          = link_to namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: 'div#notes', action: 'notes', toggle: 'tab' } do
             Discussion
             %span.badge= @merge_request.mr_and_commit_notes.user.count
         %li.commits-tab
-          = link_to commits_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: {target: 'div#commits', action: 'commits', toggle: 'tab'} do
+          = link_to commits_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: 'div#commits', action: 'commits', toggle: 'tab' } do
             Commits
             %span.badge= @commits_count
         - if @pipeline
+          %li.pipelines-tab
+            = link_to pipelines_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: '#pipelines', action: 'pipelines', toggle: 'tab' } do
+              Pipelines
+              %span.badge= @merge_request.all_pipelines.size
           %li.builds-tab
-            = link_to builds_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: {target: '#builds', action: 'builds', toggle: 'tab'} do
+            = link_to builds_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: '#builds', action: 'builds', toggle: 'tab' } do
               Builds
               %span.badge= @statuses.size
         %li.diffs-tab
-          = link_to diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: {target: 'div#diffs', action: 'diffs', toggle: 'tab'} do
+          = link_to diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: 'div#diffs', action: 'diffs', toggle: 'tab' } do
             Changes
             %span.badge= @merge_request.diff_size
 
@@ -76,6 +80,8 @@
           - # This tab is always loaded via AJAX
         #builds.builds.tab-pane
           - # This tab is always loaded via AJAX
+        #pipelines.pipelines.tab-pane
+          - # This tab is always loaded via AJAX
         #diffs.diffs.tab-pane
           - # This tab is always loaded via AJAX
 
diff --git a/app/views/projects/merge_requests/show/_builds.html.haml b/app/views/projects/merge_requests/show/_builds.html.haml
index 81de60f116c..808ef7fed27 100644
--- a/app/views/projects/merge_requests/show/_builds.html.haml
+++ b/app/views/projects/merge_requests/show/_builds.html.haml
@@ -1,2 +1 @@
 = render "projects/commit/pipeline", pipeline: @pipeline, link_to_commit: true
-
diff --git a/app/views/projects/merge_requests/show/_pipelines.html.haml b/app/views/projects/merge_requests/show/_pipelines.html.haml
new file mode 100644
index 00000000000..afe3f3430c6
--- /dev/null
+++ b/app/views/projects/merge_requests/show/_pipelines.html.haml
@@ -0,0 +1 @@
+= render "projects/commit/pipelines_list", pipelines: @pipelines, link_to_commit: true
diff --git a/app/views/projects/merge_requests/widget/_show.html.haml b/app/views/projects/merge_requests/widget/_show.html.haml
index d9efe81701f..ea618263a4a 100644
--- a/app/views/projects/merge_requests/widget/_show.html.haml
+++ b/app/views/projects/merge_requests/widget/_show.html.haml
@@ -23,7 +23,8 @@
       preparing: "{{status}} build",
       normal: "Build {{status}}"
     },
-    builds_path: "#{builds_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}"
+    builds_path: "#{builds_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}",
+    pipelines_path: "#{pipelines_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)}"
   };
 
   if (typeof merge_request_widget !== 'undefined') {
diff --git a/config/routes.rb b/config/routes.rb
index 293d9e69813..f2c51706e25 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -723,6 +723,7 @@ Rails.application.routes.draw do
             get :commits
             get :diffs
             get :builds
+            get :pipelines
             get :merge_check
             post :merge
             post :cancel_merge_when_build_succeeds
diff --git a/db/fixtures/development/14_builds.rb b/db/fixtures/development/14_builds.rb
index 6441a036e75..0d493fa1c3c 100644
--- a/db/fixtures/development/14_builds.rb
+++ b/db/fixtures/development/14_builds.rb
@@ -26,24 +26,44 @@ class Gitlab::Seeder::Builds
       begin
         BUILDS.each { |opts| build_create!(pipeline, opts) }
         commit_status_create!(pipeline, name: 'jenkins', status: :success)
-
         print '.'
       rescue ActiveRecord::RecordInvalid
         print 'F'
+      ensure
+        pipeline.build_updated
       end
     end
   end
 
   def pipelines
-    commits = @project.repository.commits('master', limit: 5)
-    commits_sha = commits.map { |commit| commit.raw.id }
-    commits_sha.map do |sha|
-      @project.ensure_pipeline(sha, 'master')
-    end
+    master_pipelines + merge_request_pipelines
+  end
+
+  def master_pipelines
+    create_pipelines_for(@project, 'master')
   rescue
     []
   end
 
+  def merge_request_pipelines
+    @project.merge_requests.last(5).map do |merge_request|
+      create_pipelines(merge_request.source_project, merge_request.source_branch, merge_request.commits.last(5))
+    end.flatten
+  rescue
+    []
+  end
+
+  def create_pipelines_for(project, ref)
+    commits = project.repository.commits(ref, limit: 5)
+    create_pipelines(project, ref, commits)
+  end
+
+  def create_pipelines(project, ref, commits)
+    commits.map do |commit|
+      project.pipelines.create(sha: commit.id, ref: ref)
+    end
+  end
+
   def build_create!(pipeline, opts = {})
     attributes = build_attributes_for(pipeline, opts)
 
diff --git a/spec/features/merge_requests/pipelines_spec.rb b/spec/features/merge_requests/pipelines_spec.rb
new file mode 100644
index 00000000000..9c4c0525267
--- /dev/null
+++ b/spec/features/merge_requests/pipelines_spec.rb
@@ -0,0 +1,48 @@
+require 'spec_helper'
+
+feature 'Pipelines for Merge Requests', feature: true, js: true do
+  include WaitForAjax
+
+  given(:user) { create(:user) }
+  given(:merge_request) { create(:merge_request) }
+  given(:project) { merge_request.target_project }
+
+  before do
+    project.team << [user, :master]
+    login_as user
+  end
+
+  context 'with pipelines' do
+    let!(:pipeline) do
+      create(:ci_empty_pipeline,
+             project: merge_request.source_project,
+             ref: merge_request.source_branch,
+             sha: merge_request.diff_head_sha)
+    end
+
+    before do
+      visit namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+
+    scenario 'user visits merge request pipelines tab' do
+      page.within('.merge-request-tabs') do
+        click_link('Pipelines')
+      end
+      wait_for_ajax
+
+      expect(page).to have_selector('.pipeline-actions')
+    end
+  end
+
+  context 'without pipelines' do
+    before do
+      visit namespace_project_merge_request_path(project.namespace, project, merge_request)
+    end
+
+    scenario 'user visits merge request page' do
+      page.within('.merge-request-tabs') do
+        expect(page).to have_no_link('Pipelines')
+      end
+    end
+  end
+end
diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index 35a4418ebb3..acb75ec21a9 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -456,6 +456,20 @@ describe MergeRequest, models: true do
     subject { create :merge_request, :simple }
   end
 
+  describe '#commits_sha' do
+    let(:commit0) { double('commit0', sha: 'sha1') }
+    let(:commit1) { double('commit1', sha: 'sha2') }
+    let(:commit2) { double('commit2', sha: 'sha3') }
+
+    before do
+      allow(subject.merge_request_diff).to receive(:commits).and_return([commit0, commit1, commit2])
+    end
+
+    it 'returns sha of commits' do
+      expect(subject.commits_sha).to contain_exactly('sha1', 'sha2', 'sha3')
+    end
+  end
+
   describe '#pipeline' do
     describe 'when the source project exists' do
       it 'returns the latest pipeline' do
@@ -480,6 +494,19 @@ describe MergeRequest, models: true do
     end
   end
 
+  describe '#all_pipelines' do
+    let!(:pipelines) do
+      subject.merge_request_diff.commits.map do |commit|
+        create(:ci_empty_pipeline, project: subject.source_project, sha: commit.id, ref: subject.source_branch)
+      end
+    end
+
+    it 'returns a pipelines from source projects with proper ordering' do
+      expect(subject.all_pipelines).not_to be_empty
+      expect(subject.all_pipelines).to eq(pipelines.reverse)
+    end
+  end
+
   describe '#participants' do
     let(:project) { create(:project, :public) }