Merge branch 'zj-deployment-status-on-mr' into 'master'

Show deployment status on a MR view

## What are the relevant issue numbers?

Resolves #19571, one in the list of #19992

## Screenshots (if relevant)

external_url = nil
![Screen_Shot_2016-08-02_at_13.57.03](/uploads/20ea1587eea556c7a1acd0ff726a5bfb/Screen_Shot_2016-08-02_at_13.57.03.png)

external_url != nil
![Screen_Shot_2016-08-02_at_13.59.59](/uploads/0094b9ddece3f4bf76c83988840c096d/Screen_Shot_2016-08-02_at_13.59.59.png)

Note, the timings are weird between merging and deploying, that is because I did it in the wrong order.

## Does this MR meet the acceptance criteria?

- [X] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing

See merge request !5622

5 files changed, 37 insertions, 1 deletions

diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index 0a661e529f0..b4636269518 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -69,6 +69,10 @@
 
     &.ci-success {
       color: $gl-success;
+
+      a.environment {
+        color: inherit;
+      }
     }
 
     &.ci-success_with_warnings {
@@ -126,7 +130,6 @@
       &.has-conflicts .fa-exclamation-triangle {
         color: $gl-warning;
       }
-
     }
 
     p:last-child {
diff --git a/app/models/deployment.rb b/app/models/deployment.rb
index 1a7cd60817e..1e338889714 100644
--- a/app/models/deployment.rb
+++ b/app/models/deployment.rb
@@ -36,4 +36,10 @@ class Deployment < ActiveRecord::Base
   def manual_actions
     deployable.try(:other_actions)
   end
+
+  def includes_commit?(commit)
+    return false unless commit
+
+    project.repository.is_ancestor?(commit.id, sha)
+  end
 end
diff --git a/app/models/environment.rb b/app/models/environment.rb
index baed106e8c8..75e6f869786 100644
--- a/app/models/environment.rb
+++ b/app/models/environment.rb
@@ -25,4 +25,10 @@ class Environment < ActiveRecord::Base
   def nullify_external_url
     self.external_url = nil if self.external_url.blank?
   end
+
+  def includes_commit?(commit)
+    return false unless last_deployment
+
+    last_deployment.includes_commit?(commit)
+  end
 end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index f6d0d0c98f5..fe799382fd0 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -591,6 +591,14 @@ class MergeRequest < ActiveRecord::Base
     !pipeline || pipeline.success?
   end
 
+  def environments
+    return unless diff_head_commit
+
+    target_project.environments.select do |environment|
+      environment.includes_commit?(diff_head_commit)
+    end
+  end
+
   def state_human_name
     if merged?
       "Merged"
diff --git a/app/views/projects/merge_requests/widget/_heading.html.haml b/app/views/projects/merge_requests/widget/_heading.html.haml
index 6ef640bb654..494695a03a5 100644
--- a/app/views/projects/merge_requests/widget/_heading.html.haml
+++ b/app/views/projects/merge_requests/widget/_heading.html.haml
@@ -42,3 +42,16 @@
     .ci_widget.ci-error{style: "display:none"}
       = icon("times-circle")
       Could not connect to the CI server. Please check your settings and try again.
+
+- @merge_request.environments.each do |environment|
+  .mr-widget-heading
+    .ci_widget.ci-success
+      = ci_icon_for_status("success")
+      %span.hidden-sm
+        Deployed to
+        = succeed '.' do
+          = link_to environment.name, namespace_project_environment_path(@project.namespace, @project, environment), class: 'environment'
+        - external_url = environment.external_url
+        - if external_url
+          = link_to external_url, target: '_blank' do
+            = icon('external-link', text: "View on #{external_url.gsub(/\A.*?:\/\//, '')}", right: true)