Merge branch '22191-delete-dynamic-envs-mr' into 'master'

Delete dynamic environments

- Adds "close environment" action to a merge request
- Adds tabs to environments list
- Adds close button to each environment row in environments list
- Replaces Destroy button with Close button inside an environment
- Adds close button to builds list inside an environment

#### Configuration

In order to enable stopping environments a valid `.gitlab-ci.yml` syntax has to be used:

```
review:
  environment:
    name: review/$app
    on_stop: stop_review

stop_review:
  script: echo Delete My App
  when: manual
  environment:
    name: review/$app
    action: stop
```

This MR requires that `stop_review` has to have: `when`, `environment:name` and `environment:action` defined.
The next MR after this one will verify that and enforce that these settings are configured.

It will also implicitly configure these settings, making it possible to define it like this:

```
review:
  environment:
    name: review/$app
    on_stop: stop_review

stop_review:
  script: echo Delete My App
```

Closes #22191 

See merge request !6669

2 files changed, 116 insertions, 0 deletions

diff --git a/spec/models/deployment_spec.rb b/spec/models/deployment_spec.rb
index 01a4a53a264..ca594a320c0 100644
--- a/spec/models/deployment_spec.rb
+++ b/spec/models/deployment_spec.rb
@@ -48,4 +48,50 @@ describe Deployment, models: true do
       end
     end
   end
+
+  describe '#stop_action' do
+    let(:build) { create(:ci_build) }
+
+    subject { deployment.stop_action }
+
+    context 'when no other actions' do
+      let(:deployment) { FactoryGirl.build(:deployment, deployable: build) }
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'with other actions' do
+      let!(:close_action) { create(:ci_build, pipeline: build.pipeline, name: 'close_app', when: :manual) }
+
+      context 'when matching action is defined' do
+        let(:deployment) { FactoryGirl.build(:deployment, deployable: build, on_stop: 'close_other_app') }
+
+        it { is_expected.to be_nil }
+      end
+
+      context 'when no matching action is defined' do
+        let(:deployment) { FactoryGirl.build(:deployment, deployable: build, on_stop: 'close_app') }
+
+        it { is_expected.to eq(close_action) }
+      end
+    end
+  end
+
+  describe '#stoppable?' do
+    subject { deployment.stoppable? }
+
+    context 'when no other actions' do
+      let(:deployment) { build(:deployment) }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when matching action is defined' do
+      let(:build) { create(:ci_build) }
+      let(:deployment) { FactoryGirl.build(:deployment, deployable: build, on_stop: 'close_app') }
+      let!(:close_action) { create(:ci_build, pipeline: build.pipeline, name: 'close_app', when: :manual) }
+
+      it { is_expected.to be_truthy }
+    end
+  end
 end
diff --git a/spec/models/environment_spec.rb b/spec/models/environment_spec.rb
index e172ee8e590..a94e6d0165f 100644
--- a/spec/models/environment_spec.rb
+++ b/spec/models/environment_spec.rb
@@ -8,6 +8,8 @@ describe Environment, models: true do
 
   it { is_expected.to delegate_method(:last_deployment).to(:deployments).as(:last) }
 
+  it { is_expected.to delegate_method(:stop_action).to(:last_deployment) }
+
   it { is_expected.to validate_presence_of(:name) }
   it { is_expected.to validate_uniqueness_of(:name).scoped_to(:project_id) }
   it { is_expected.to validate_length_of(:name).is_within(0..255) }
@@ -96,4 +98,72 @@ describe Environment, models: true do
       is_expected.to be_nil
     end
   end
+
+  describe '#stoppable?' do
+    subject { environment.stoppable? }
+
+    context 'when no other actions' do
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when matching action is defined' do
+      let(:build) { create(:ci_build) }
+      let!(:deployment) { create(:deployment, environment: environment, deployable: build, on_stop: 'close_app') }
+      let!(:close_action) { create(:ci_build, pipeline: build.pipeline, name: 'close_app', when: :manual) }
+
+      context 'when environment is available' do
+        before do
+          environment.start
+        end
+
+        it { is_expected.to be_truthy }
+      end
+
+      context 'when environment is stopped' do
+        before do
+          environment.stop
+        end
+
+        it { is_expected.to be_falsey }
+      end
+    end
+  end
+
+  describe '#stop!' do
+    let(:user) { create(:user) }
+
+    subject { environment.stop!(user) }
+
+    before do
+      expect(environment).to receive(:stoppable?).and_call_original
+    end
+
+    context 'when no other actions' do
+      it { is_expected.to be_nil }
+    end
+
+    context 'when matching action is defined' do
+      let(:build) { create(:ci_build) }
+      let!(:deployment) { create(:deployment, environment: environment, deployable: build, on_stop: 'close_app') }
+
+      context 'when action did not yet finish' do
+        let!(:close_action) { create(:ci_build, :manual, pipeline: build.pipeline, name: 'close_app') }
+
+        it 'returns the same action' do
+          expect(subject).to eq(close_action)
+          expect(subject.user).to eq(user)
+        end
+      end
+
+      context 'if action did finish' do
+        let!(:close_action) { create(:ci_build, :manual, :success, pipeline: build.pipeline, name: 'close_app') }
+
+        it 'returns a new action of the same type' do
+          is_expected.to be_persisted
+          expect(subject.name).to eq(close_action.name)
+          expect(subject.user).to eq(user)
+        end
+      end
+    end
+  end
 end