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

11 files changed, 137 insertions, 2 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 3a50d0c066b..ccc60846787 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -40,6 +40,7 @@ v 8.11.0 (unreleased)
   - Update `timeago` plugin to use multiple string/locale settings
   - Remove unused images (ClemMakesApps)
   - Limit git rev-list output count to one in forced push check
+  - Show deployment status on merge requests with external URLs
   - Clean up unused routes (Josef Strzibny)
   - Fix issue on empty project to allow developers to only push to protected branches if given permission
   - Add green outline to New Branch button. !5447 (winniehell)
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)
diff --git a/db/schema.rb b/db/schema.rb
index 1de2cdcf026..f008a6bd7a7 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -589,12 +589,12 @@ ActiveRecord::Schema.define(version: 20160810142633) do
     t.datetime "locked_at"
     t.integer  "updated_by_id"
     t.string   "merge_error"
-    t.text     "merge_params"
     t.boolean  "merge_when_build_succeeds",    default: false, null: false
     t.integer  "merge_user_id"
     t.string   "merge_commit_sha"
     t.datetime "deleted_at"
     t.string   "in_progress_merge_commit_sha"
+    t.text     "merge_params"
   end
 
   add_index "merge_requests", ["assignee_id"], name: "index_merge_requests_on_assignee_id", using: :btree
diff --git a/spec/models/deployment_spec.rb b/spec/models/deployment_spec.rb
index 7df3df4bb9e..bfff639ad78 100644
--- a/spec/models/deployment_spec.rb
+++ b/spec/models/deployment_spec.rb
@@ -15,4 +15,28 @@ describe Deployment, models: true do
 
   it { is_expected.to validate_presence_of(:ref) }
   it { is_expected.to validate_presence_of(:sha) }
+
+  describe '#includes_commit?' do
+    let(:project)     { create(:project) }
+    let(:environment) { create(:environment, project: project) }
+    let(:deployment) do
+      create(:deployment, environment: environment, sha: project.commit.id)
+    end
+
+    context 'when there is no project commit' do
+      it 'returns false' do
+        commit = project.commit('feature')
+
+        expect(deployment.includes_commit?(commit)).to be false
+      end
+    end
+
+    context 'when they share the same tree branch' do
+      it 'returns true' do
+        commit = project.commit
+
+        expect(deployment.includes_commit?(commit)).to be true
+      end
+    end
+  end
 end
diff --git a/spec/models/environment_spec.rb b/spec/models/environment_spec.rb
index 8a84ac0a7c7..c881897926e 100644
--- a/spec/models/environment_spec.rb
+++ b/spec/models/environment_spec.rb
@@ -30,4 +30,37 @@ describe Environment, models: true do
       expect(env.external_url).to be_nil
     end
   end
+
+  describe '#includes_commit?' do
+    context 'without a last deployment' do
+      it "returns false" do
+        expect(environment.includes_commit?('HEAD')).to be false
+      end
+    end
+
+    context 'with a last deployment' do
+      let(:project)     { create(:project) }
+      let(:environment) { create(:environment, project: project) }
+
+      let!(:deployment) do
+        create(:deployment, environment: environment, sha: project.commit('master').id)
+      end
+
+      context 'in the same branch' do
+        it 'returns true' do
+          expect(environment.includes_commit?(RepoHelpers.sample_commit)).to be true
+        end
+      end
+
+      context 'not in the same branch' do
+        before do
+          deployment.update(sha: project.commit('feature').id)
+        end
+
+        it 'returns false' do
+          expect(environment.includes_commit?(RepoHelpers.sample_commit)).to be false
+        end
+      end
+    end
+  end
 end
diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index 3270b877c1a..35a4418ebb3 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -674,6 +674,21 @@ describe MergeRequest, models: true do
     end
   end
 
+  describe "#environments" do
+    let(:project)       { create(:project) }
+    let!(:environment)  { create(:environment, project: project) }
+    let!(:environment1) { create(:environment, project: project) }
+    let!(:environment2) { create(:environment, project: project) }
+    let(:merge_request) { create(:merge_request, source_project: project) }
+
+    it 'selects deployed environments' do
+      create(:deployment, environment: environment, sha: project.commit('master').id)
+      create(:deployment, environment: environment1, sha: project.commit('feature').id)
+
+      expect(merge_request.environments).to eq [environment]
+    end
+  end
+
   describe "#reload_diff" do
     let(:note) { create(:diff_note_on_merge_request, project: subject.project, noteable: subject) }
 
diff --git a/spec/views/projects/merge_requests/_heading.html.haml_spec.rb b/spec/views/projects/merge_requests/_heading.html.haml_spec.rb
new file mode 100644
index 00000000000..733b2dfa7ff
--- /dev/null
+++ b/spec/views/projects/merge_requests/_heading.html.haml_spec.rb
@@ -0,0 +1,26 @@
+require 'spec_helper'
+
+describe 'projects/merge_requests/widget/_heading' do
+  include Devise::TestHelpers
+
+  context 'when released to an environment' do
+    let(:project)       { merge_request.target_project }
+    let(:merge_request) { create(:merge_request, :merged) }
+    let(:environment)   { create(:environment, project: project) }
+    let!(:deployment)   do
+      create(:deployment, environment: environment, sha: project.commit('master').id)
+    end
+
+    before do
+      assign(:merge_request, merge_request)
+      assign(:project, project)
+
+      render
+    end
+
+    it 'displays that the environment is deployed' do
+      expect(rendered).to match("Deployed to")
+      expect(rendered).to match("#{environment.name}")
+    end
+  end
+end