Introduce deploy command that allows to start deployment from one environment to second one

app/models/environment.rb

@@ -103,8 +103,8 @@ class Environment < ActiveRecord::Base
   def actions_for(environment)
     return [] unless manual_actions
-    manual_actions.select |action|
-      action.expanded_environment_name = environment
+    manual_actions.select do |action|
+      action.expanded_environment_name == environment
     end
   end
 end

changelogs/unreleased/chatops-deploy-command.yml

+---
+title: Add deployment command to ChatOps
+merge_request: 7619
+author: 

lib/gitlab/chat_commands/command.rb

@@ -4,6 +4,7 @@ module Gitlab
       COMMANDS = [
         Gitlab::ChatCommands::IssueShow,
         Gitlab::ChatCommands::IssueCreate,
+        Gitlab::ChatCommands::Deploy,
       ].freeze
       def execute

lib/gitlab/chat_commands/deploy.rb

@@ -9,6 +9,10 @@ module Gitlab
         'deploy <environment> to <target-environment>'
       end
+      def self.available?(project)
+        project.builds_enabled?
+      end
+
       def self.allowed?(project, user)
         can?(user, :create_deployment, project)
       end
@@ -17,11 +21,8 @@ module Gitlab
         from = match[:from]
         to = match[:to]
-        environment = project.environments.find_by(name: from)
-        return unless environment
-
-        actions = environment.actions_for(to)
-        return unless actions.any?
+        actions = find_actions(from, to)
+        return unless actions.present?
         if actions.one?
           actions.first.play(current_user)
@@ -29,6 +30,15 @@ module Gitlab
           Result.new(:error, 'Too many actions defined')
         end
       end
+
+      private
+
+      def find_actions(from, to)
+        environment = project.environments.find_by(name: from)
+        return unless environment
+
+        environment.actions_for(to).select(&:starts_environment?)
+      end
     end
   end
 end

spec/factories/ci/builds.rb

@@ -55,6 +55,12 @@ FactoryGirl.define do
       self.when 'manual'
     end
+    trait :teardown_environment do
+      options do
+        { environment: { action: 'stop' } }
+      end
+    end
+
     trait :allowed_to_fail do
       allow_failure true
     end

spec/lib/gitlab/chat_commands/command_spec.rb

@@ -4,9 +4,9 @@ describe Gitlab::ChatCommands::Command, service: true do
   let(:project) { create(:empty_project) }
   let(:user) { create(:user) }
-  subject { described_class.new(project, user, params).execute }
-
   describe '#execute' do
+    subject { described_class.new(project, user, params).execute }
+
     context 'when no command is available' do
       let(:params) { { text: 'issue show 1' } }
       let(:project) { create(:project, has_external_issue_tracker: true) }
@@ -51,5 +51,44 @@ describe Gitlab::ChatCommands::Command, service: true do
         expect(subject[:text]).to match(/\/issues\/\d+/)
       end
     end
+
+    context 'when trying to do deployment' do
+      let(:params) { { text: 'deploy staging to production' } }
+      let!(:build) { create(:ci_build, project: project) }
+      let!(:staging) { create(:environment, name: 'staging', project: project) }
+      let!(:deployment) { create(:deployment, environment: staging, deployable: build) }
+      let!(:manual) do
+        create(:ci_build, :manual, project: project, pipeline: build.pipeline, name: 'first', environment: 'production')
+      end
+
+      context 'and user can not create deployment' do
+        it 'returns action' do
+          expect(subject[:response_type]).to be(:ephemeral)
+          expect(subject[:text]).to start_with('Whoops! That action is not allowed')
+        end
+      end
+
+      context 'and user does have deployment permission' do
+        before do
+          project.team << [user, :developer]
+        end
+
+        it 'returns action' do
+          expect(subject[:text]).to include(manual.name)
+          expect(subject[:response_type]).to be(:in_channel)
+        end
+
+        context 'when duplicate action exists' do
+          let!(:manual2) do
+            create(:ci_build, :manual, project: project, pipeline: build.pipeline, name: 'second', environment: 'production')
+          end
+
+          it 'returns error' do
+            expect(subject[:response_type]).to be(:ephemeral)
+            expect(subject[:text]).to include('Too many actions defined')
+          end
+        end
+      end
+    end
   end
 end

spec/lib/gitlab/chat_commands/deploy_spec.rb

+require 'spec_helper'
+
+describe Gitlab::ChatCommands::Deploy, service: true do
+  describe '#execute' do
+    let(:project) { create(:empty_project) }
+    let(:user) { create(:user) }
+    let(:regex_match) { described_class.match('deploy staging to production') }
+
+    before do
+      project.team << [user, :master]
+    end
+
+    subject do
+      described_class.new(project, user).execute(regex_match)
+    end
+
+    context 'if no environment is defined' do
+      it 'returns nil' do
+        expect(subject).to be_nil
+      end
+    end
+
+    context 'with environment' do
+      let!(:staging) { create(:environment, name: 'staging', project: project) }
+      let!(:build) { create(:ci_build, project: project) }
+      let!(:deployment) { create(:deployment, environment: staging, deployable: build) }
+
+      context 'without actions' do
+        it 'returns nil' do
+          expect(subject).to be_nil
+        end
+      end
+
+      context 'with action' do
+        let!(:manual1) do
+          create(:ci_build, :manual, project: project, pipeline: build.pipeline, name: 'first', environment: 'production')
+        end
+
+        it 'returns action' do
+          expect(subject).to eq(manual1)
+        end
+
+        context 'when duplicate action exists' do
+          let!(:manual2) do
+            create(:ci_build, :manual, project: project, pipeline: build.pipeline, name: 'second', environment: 'production')
+          end
+
+          it 'returns error' do
+            expect(subject.message).to eq('Too many actions defined')
+          end
+        end
+
+        context 'when teardown action exists' do
+          let!(:teardown) do
+            create(:ci_build, :manual, :teardown_environment, project: project, pipeline: build.pipeline,
+                   name: 'teardown', environment: 'production')
+          end
+
+          it 'returns error' do
+            expect(subject).to eq(action)
+          end
+        end
+      end
+    end
+  end
+
+  describe 'self.match' do
+    it 'matches the environment' do
+      match = described_class.match('deploy staging to production')
+
+      expect(match[:from]).to eq('staging')
+      expect(match[:to]).to eq('production')
+    end
+  end
+end

spec/models/environment_spec.rb

@@ -9,6 +9,7 @@ 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 delegate_method(:manual_actions).to(:last_deployment) }
   it { is_expected.to validate_presence_of(:name) }
   it { is_expected.to validate_uniqueness_of(:name).scoped_to(:project_id) }
@@ -187,4 +188,15 @@ describe Environment, models: true do
       it { is_expected.to be false }
     end
   end
+
+  describe '#actions_for' do
+    let(:deployment) { create(:deployment, environment: environment) }
+    let(:pipeline) { deployment.deployable.pipeline }
+    let!(:review_action) { create(:ci_build, :manual, name: 'review-apps', pipeline: pipeline, environment: 'review/$CI_BUILD_REF_NAME' )}
+    let!(:production_action) { create(:ci_build, :manual, name: 'production', pipeline: pipeline, environment: 'production' )}
+
+    it 'returns a list of actions with matching environment' do
+      expect(environment.actions_for('review/master')).to contain_exactly(review_action)
+    end
+  end
 end