Merge branch '18141-pipeline-graph' into 'master'

Add pipeline graph

## What does this MR do?
Adds pipeline visualization

## What are the relevant issue numbers?
Closes #18141    
Part of #19982 

## Screenshots (if relevant)
![Screen_Shot_2016-08-16_at_7.59.52_PM](/uploads/c9dd695d2ddbd2a85e98a5b4e500d52c/Screen_Shot_2016-08-16_at_7.59.52_PM.png)
![Screen_Shot_2016-08-16_at_7.55.49_PM](/uploads/5ab548cc5fc8a42371d3b54108798c02/Screen_Shot_2016-08-16_at_7.55.49_PM.png)

See merge request !5742

11 files changed, 272 insertions, 17 deletions

diff --git a/CHANGELOG b/CHANGELOG
index ba1087a4d75..46a060b6c88 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -113,6 +113,7 @@ v 8.11.0 (unreleased)
   - Speed up and reduce memory usage of Commit#repo_changes, Repository#expire_avatar_cache and IrkerWorker
   - Add unfold links for Side-by-Side view. !5415 (Tim Masliuchenko)
   - Adds support for pending invitation project members importing projects
+  - Add pipeline visualization/graph on pipeline page
   - Update devise initializer to turn on changed password notification emails. !5648 (tombell)
   - Avoid to show the original password field when password is automatically set. !5712 (duduribeiro)
   - Fix importing GitLab projects with an invalid MR source project
diff --git a/app/assets/javascripts/pipeline.js.es6 b/app/assets/javascripts/pipeline.js.es6
new file mode 100644
index 00000000000..bf33eb10100
--- /dev/null
+++ b/app/assets/javascripts/pipeline.js.es6
@@ -0,0 +1,15 @@
+(function() {
+  function toggleGraph() {
+    const $pipelineBtn = $(this).closest('.toggle-pipeline-btn');
+    const $pipelineGraph = $(this).closest('.row-content-block').next('.pipeline-graph');
+    const $btnText = $(this).find('.toggle-btn-text');
+
+    $($pipelineBtn).add($pipelineGraph).toggleClass('graph-collapsed');
+
+    const graphCollapsed = $pipelineGraph.hasClass('graph-collapsed');
+
+    graphCollapsed ? $btnText.text('Expand') : $btnText.text('Hide')
+  }
+
+  $(document).on('click', '.toggle-pipeline-btn', toggleGraph);
+})();
diff --git a/app/assets/stylesheets/pages/pipelines.scss b/app/assets/stylesheets/pages/pipelines.scss
index 50ac4d8449b..ce1c424624f 100644
--- a/app/assets/stylesheets/pages/pipelines.scss
+++ b/app/assets/stylesheets/pages/pipelines.scss
@@ -230,6 +230,187 @@
   }
 }
 
+// Pipeline visualization
+
+.toggle-pipeline-btn {
+  background-color: $gray-dark;
+
+  .caret {
+    border-top: none;
+    border-bottom: 4px solid;
+  }
+
+  &.graph-collapsed {
+    background-color: $white-light;
+
+    .caret {
+      border-bottom: none;
+      border-top: 4px solid;
+    }
+  }
+}
+
+.pipeline-graph {
+  width: 100%;
+  overflow: auto;
+  white-space: nowrap;
+  max-height: 500px;
+  transition: max-height 0.3s, padding 0.3s;
+
+  &.graph-collapsed {
+    max-height: 0;
+    padding: 0 16px;
+  }
+}
+
+.pipeline-visualization {
+  position: relative;
+  min-width: 1220px;
+
+  ul {
+    padding: 0;
+  }
+}
+
+.stage-column {
+  display: inline-block;
+  vertical-align: top;
+  margin-right: 50px;
+
+  li {
+    list-style: none;
+  }
+
+  .stage-name {
+    margin-bottom: 15px;
+    font-weight: bold;
+    width: 150px;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
+  .build {
+    border: 1px solid $border-color;
+    position: relative;
+    padding: 6px 10px;
+    border-radius: 30px;
+    width: 150px;
+    margin-bottom: 10px;
+
+    &.playable {
+      background-color: $gray-light;
+    }
+
+    .build-content {
+      width: 130px;
+      white-space: nowrap;
+      overflow: hidden;
+      text-overflow: ellipsis;
+
+      a {
+        color: $layout-link-gray;
+      }
+    }
+
+    svg {
+      position: relative;
+      top: 2px;
+      margin-right: 5px;
+    }
+
+    .fa {
+      font-size: 13px;
+    }
+
+    // Connect first build in each stage with right horizontal line
+    &:first-child {
+      &::after {
+        content: '';
+        position: absolute;
+        top: 50%;
+        right: -54px;
+        border-top: 2px solid $border-color;
+        width: 54px;
+        height: 1px;
+      }
+    }
+
+    // Connect each build (except for first) with curved lines
+    &:not(:first-child) {
+      &::after, &::before {
+        content: '';
+        top: -47px;
+        position: absolute;
+        border-bottom: 2px solid $border-color;
+        width: 20px;
+        height: 65px;
+      }
+
+      // Right connecting curves
+      &::after {
+        right: -20px;
+        border-right: 2px solid $border-color;
+        border-radius: 0 0 50px;
+      }
+
+      // Left connecting curves
+      &::before {
+        left: -20px;
+        border-left: 2px solid $border-color;
+        border-radius: 0 0 0 50px;
+      }
+    }
+
+    // Connect second build to first build with smaller curved line
+    &:nth-child(2) {
+      &::after, &::before {
+        height: 45px;
+        top: -26px;
+      }
+    }
+  }
+
+  &:last-child {
+    .build {
+      // Remove right connecting horizontal line from first build in last stage
+      &:first-child {
+        &::after, &::before {
+          border: none;
+        }
+      }
+      // Remove right curved connectors from all builds in last stage
+      &:not(:first-child) {
+        &::after {
+          border: none;
+        }
+      }
+    }
+  }
+
+  &:first-child {
+    .build {
+      // Remove left curved connectors from all builds in first stage
+      &:not(:first-child) {
+        &::before {
+          border: none;
+        }
+      }
+    }
+  }
+}
+
+.pipeline-actions {
+  border-bottom: none;
+}
+
+.toggle-pipeline-btn {
+
+  .fa {
+    color: $dropdown-header-color;
+  }
+}
+
 .pipelines.tab-pane {
 
   .content-list.pipelines {
diff --git a/app/helpers/ci_status_helper.rb b/app/helpers/ci_status_helper.rb
index ea2f5f9281a..94df7d131ca 100644
--- a/app/helpers/ci_status_helper.rb
+++ b/app/helpers/ci_status_helper.rb
@@ -38,6 +38,10 @@ module CiStatusHelper
         'icon_status_pending'
       when 'running'
         'icon_status_running'
+      when 'play'
+        return icon('play fw')
+      when 'created'
+        'icon_status_pending'
       else
         'icon_status_cancel'
       end
@@ -48,13 +52,13 @@ module CiStatusHelper
   def render_commit_status(commit, tooltip_placement: 'auto left')
     project = commit.project
     path = builds_namespace_project_commit_path(project.namespace, project, commit)
-    render_status_with_link('commit', commit.status, path, tooltip_placement)
+    render_status_with_link('commit', commit.status, path, tooltip_placement: tooltip_placement)
   end
 
   def render_pipeline_status(pipeline, tooltip_placement: 'auto left')
     project = pipeline.project
     path = namespace_project_pipeline_path(project.namespace, project, pipeline)
-    render_status_with_link('pipeline', pipeline.status, path, tooltip_placement)
+    render_status_with_link('pipeline', pipeline.status, path, tooltip_placement: tooltip_placement)
   end
 
   def no_runners_for_project?(project)
@@ -62,13 +66,17 @@ module CiStatusHelper
       Ci::Runner.shared.blank?
   end
 
-  private
+  def render_status_with_link(type, status, path = nil, tooltip_placement: 'auto left', cssclass: '')
+    klass = "ci-status-link ci-status-icon-#{status.dasherize} #{cssclass}"
+    title = "#{type.titleize}: #{ci_label_for_status(status)}"
+    data = { toggle: 'tooltip', placement: tooltip_placement }
 
-  def render_status_with_link(type, status, path, tooltip_placement, cssclass: '')
-    link_to ci_icon_for_status(status),
-            path,
-            class: "ci-status-link ci-status-icon-#{status.dasherize} #{cssclass}",
-            title: "#{type.titleize}: #{ci_label_for_status(status)}",
-            data: { toggle: 'tooltip', placement: tooltip_placement }
+    if path
+      link_to ci_icon_for_status(status), path,
+              class: klass, title: title, data: data
+    else
+      content_tag :span, ci_icon_for_status(status),
+              class: klass, title: title, data: data
+    end
   end
 end
diff --git a/app/models/ci/build.rb b/app/models/ci/build.rb
index 3d6c6ea3209..096280ab617 100644
--- a/app/models/ci/build.rb
+++ b/app/models/ci/build.rb
@@ -97,7 +97,7 @@ module Ci
     end
 
     def playable?
-      project.builds_enabled? && commands.present? && manual?
+      project.builds_enabled? && commands.present? && manual? && skipped?
     end
 
     def play(current_user = nil)
diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 8cfba92ae9b..c3d22933683 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -72,6 +72,10 @@ module Ci
       CommitStatus.where(pipeline: pluck(:id)).stages
     end
 
+    def stages_with_latest_statuses
+      statuses.latest.order(:stage_idx).group_by(&:stage)
+    end
+
     def project_id
       project.id
     end
diff --git a/app/views/projects/ci/builds/_build_pipeline.html.haml b/app/views/projects/ci/builds/_build_pipeline.html.haml
new file mode 100644
index 00000000000..04cbd0c3591
--- /dev/null
+++ b/app/views/projects/ci/builds/_build_pipeline.html.haml
@@ -0,0 +1,14 @@
+- is_playable = subject.playable? && can?(current_user, :update_build, @project)
+%li.build{class: ("playable" if is_playable)}
+  .build-content
+    - if is_playable
+      = link_to play_namespace_project_build_path(subject.project.namespace, subject.project, subject, return_to: request.original_url), method: :post, title: 'Play' do
+        = render_status_with_link('build', 'play')
+        = subject.name
+    - elsif can?(current_user, :read_build, @project)
+      = link_to namespace_project_build_path(subject.project.namespace, subject.project, subject) do
+        = render_status_with_link('build', subject.status)
+        = subject.name
+    - else
+      = render_status_with_link('build', subject.status)
+      = ci_icon_for_status(subject.status)
diff --git a/app/views/projects/commit/_pipeline.html.haml b/app/views/projects/commit/_pipeline.html.haml
index 640abdb993f..20a85148ab5 100644
--- a/app/views/projects/commit/_pipeline.html.haml
+++ b/app/views/projects/commit/_pipeline.html.haml
@@ -1,5 +1,9 @@
-.row-content-block.build-content.middle-block
+.row-content-block.build-content.middle-block.pipeline-actions
   .pull-right
+    .btn.btn-grouped.btn-white.toggle-pipeline-btn
+      %span.toggle-btn-text Hide
+      %span pipeline graph
+      %span.caret
     - if can?(current_user, :update_pipeline, pipeline.project)
       - if pipeline.builds.latest.failed.any?(&:retryable?)
         = link_to "Retry failed", retry_namespace_project_pipeline_path(pipeline.project.namespace, pipeline.project, pipeline.id), class: 'btn btn-grouped btn-primary', method: :post
@@ -23,6 +27,22 @@
         in
         = time_interval_in_words pipeline.duration
 
+.row-content-block.build-content.middle-block.pipeline-graph
+  .pipeline-visualization
+    %ul.stage-column-list
+      - stages = pipeline.stages_with_latest_statuses
+      - stages.each do |stage, statuses|
+        %li.stage-column
+          .stage-name
+            %a{name: stage}
+            - if stage
+              = stage.titleize
+          .builds-container
+            %ul
+              - statuses.each do |status|
+                = render "projects/#{status.to_partial_path}_pipeline", subject: status
+
+
 - if pipeline.yaml_errors.present?
   .bs-callout.bs-callout-danger
     %h4 Found errors in your .gitlab-ci.yml:
diff --git a/app/views/projects/generic_commit_statuses/_generic_commit_status_pipeline.html.haml b/app/views/projects/generic_commit_statuses/_generic_commit_status_pipeline.html.haml
new file mode 100644
index 00000000000..584c0fa18ae
--- /dev/null
+++ b/app/views/projects/generic_commit_statuses/_generic_commit_status_pipeline.html.haml
@@ -0,0 +1,9 @@
+%li.build
+  .build-content
+    - if subject.target_url
+      - link_to subject.target_url do
+        = render_status_with_link('commit status', subject.status)
+        = subject.name
+    - else
+      = render_status_with_link('commit status', subject.status)
+      = subject.name
diff --git a/db/fixtures/development/14_builds.rb b/db/fixtures/development/14_builds.rb
index 0d493fa1c3c..069d9dd6226 100644
--- a/db/fixtures/development/14_builds.rb
+++ b/db/fixtures/development/14_builds.rb
@@ -1,9 +1,8 @@
 class Gitlab::Seeder::Builds
-  STAGES = %w[build notify_build test notify_test deploy notify_deploy]
+  STAGES = %w[build test deploy notify]
   BUILDS = [
     { name: 'build:linux', stage: 'build', status: :success },
     { name: 'build:osx', stage: 'build', status: :success },
-    { name: 'slack post build', stage: 'notify_build', status: :success },
     { name: 'rspec:linux', stage: 'test', status: :success },
     { name: 'rspec:windows', stage: 'test', status: :success },
     { name: 'rspec:windows', stage: 'test', status: :success },
@@ -12,9 +11,9 @@ class Gitlab::Seeder::Builds
     { name: 'spinach:osx', stage: 'test', status: :canceled },
     { name: 'cucumber:linux', stage: 'test', status: :running },
     { name: 'cucumber:osx', stage: 'test', status: :failed },
-    { name: 'slack post test', stage: 'notify_test', status: :success },
     { name: 'staging', stage: 'deploy', environment: 'staging', status: :success },
-    { name: 'production', stage: 'deploy', environment: 'production', when: 'manual', status: :success },
+    { name: 'production', stage: 'deploy', environment: 'production', when: 'manual', status: :skipped },
+    { name: 'slack', stage: 'notify', when: 'manual', status: :created },
   ]
 
   def initialize(project)
@@ -25,7 +24,7 @@ class Gitlab::Seeder::Builds
     pipelines.each do |pipeline|
       begin
         BUILDS.each { |opts| build_create!(pipeline, opts) }
-        commit_status_create!(pipeline, name: 'jenkins', status: :success)
+        commit_status_create!(pipeline, name: 'jenkins', stage: 'test', status: :success)
         print '.'
       rescue ActiveRecord::RecordInvalid
         print 'F'
diff --git a/spec/features/projects/pipelines_spec.rb b/spec/features/projects/pipelines_spec.rb
index 29d150bc597..47482bc3cc9 100644
--- a/spec/features/projects/pipelines_spec.rb
+++ b/spec/features/projects/pipelines_spec.rb
@@ -193,7 +193,11 @@ describe "Pipelines" do
     end
 
     context 'playing manual build' do
-      before { click_link('Play') }
+      before do
+        within '.pipeline-holder' do
+          click_link('Play')
+        end
+      end
 
       it { expect(@manual.reload).to be_pending }
     end