Virtual deployment status calculation

app/models/ci/build.rb

@@ -116,6 +116,8 @@ module Ci
       where("EXISTS (?)", matcher)
     end
+    scope :with_environment, ->() { where("environment <> ''") }
+
     mount_uploader :legacy_artifacts_file, LegacyArtifactUploader, mount_on: :artifacts_file
     mount_uploader :legacy_artifacts_metadata, LegacyArtifactUploader, mount_on: :artifacts_metadata
@@ -327,6 +329,10 @@ module Ci
       success? && !last_deployment.try(:last?)
     end
+    def has_latest_deployment?
+      last_deployment.try(:last?)
+    end
+
     def depends_on_builds
       # Get builds of the same type
       latest_builds = self.pipeline.builds.latest

app/models/ci/pipeline.rb

@@ -614,6 +614,14 @@ module Ci
         .fabricate!
     end
+    def detailed_deployments_status(current_user)
+      builds.latest.with_environment.map do |deployable|
+        Gitlab::Ci::Status::Build::Factory
+          .new(deployable, current_user)
+          .fabricate!
+      end
+    end
+
     def latest_builds_with_artifacts
       # We purposely cast the builds to an Array here. Because we always use the
       # rows if there are more than 0 this prevents us from having to run two

app/serializers/build_details_entity.rb

@@ -10,9 +10,9 @@ class BuildDetailsEntity < JobEntity
   expose :pipeline, using: PipelineEntity
   expose :deployment_status, if: -> (*) { build.has_environment? } do
-    expose :deployment_status, as: :status
-
-    expose :persisted_environment, as: :environment, with: EnvironmentEntity
+    expose :deployments_detail, with: DeploymentStatusEntity do |build|
+      detailed_status
+    end
   end
   expose :metadata, using: BuildMetadataEntity

app/serializers/deployment_status_entity.rb

+# frozen_string_literal: true
+
+class DeploymentStatusEntity < Grape::Entity
+  include RequestAwareEntity
+
+  expose :deployment_status, as: :status, if: -> (status, _) { status.has_deployments? }
+  expose :environment, with: EnvironmentEntity, if: -> (status, _) { status.has_deployments? }
+end

app/serializers/environment_entity.rb

@@ -8,7 +8,7 @@ class EnvironmentEntity < Grape::Entity
   expose :state
   expose :external_url
   expose :environment_type
-  expose :last_deployment, using: DeploymentEntity
+  # expose :last_deployment, using: DeploymentEntity # TODO: Fix cycle reference
   expose :stop_action_available?, as: :has_stop_action
   expose :metrics_path, if: -> (environment, _) { environment.has_metrics? } do |environment|

app/serializers/pipeline_entity.rb

@@ -33,6 +33,7 @@ class PipelineEntity < Grape::Entity
     expose :detailed_status, as: :status, with: DetailedStatusEntity
     expose :duration
     expose :finished_at
+    expose :deployments_details, with: DeploymentStatusEntity
   end
   expose :ref do
@@ -82,4 +83,8 @@ class PipelineEntity < Grape::Entity
   def detailed_status
     pipeline.detailed_status(request.current_user)
   end
+
+  def deployments_details
+    pipeline.detailed_deployments_status(request.current_user)
+  end
 end

lib/gitlab/ci/status/build/deployed_failed.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class DeployedFailed < Status::Extended
+          def deployment_status
+            :failed
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? && build.failed?
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/build/deployed_latest.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class DeployedLatest < Status::Extended
+          def deployment_status
+            :last
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? &&
+              build.success? &&
+              build.has_latest_deployment?
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/build/deployed_outdated.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class DeployedOutdated < Status::Extended
+          def deployment_status
+            :out_of_date
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? &&
+              build.success? &&
+              !build.has_latest_deployment?
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/build/deploying.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class Deploying < Status::Extended
+          def deployment_status
+            :creating
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? && build.running?
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/build/factory.rb

@@ -19,7 +19,13 @@ module Gitlab
               Status::Build::Play,
               Status::Build::Stop],
              [Status::Build::Action],
-             [Status::Build::Retried]]
+             [Status::Build::Retried],
+             [Status::Build::WillDeploy,
+              Status::Build::ManualDeploy,
+              Status::Build::Deploying,
+              Status::Build::DeployedLatest,
+              Status::Build::DeployedOutdated,
+              Status::Build::DeployedFailed]]
           end
           def self.common_helpers

lib/gitlab/ci/status/build/manual_deploy.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class ManualDeploy < Status::Extended
+          def deployment_status
+            :manual_deploy
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? && (build.manual?)
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/build/will_deploy.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class WillDeploy < Status::Extended
+          def deployment_status
+            :will_deploy
+          end
+
+          def has_deployments?
+            true
+          end
+
+          def environment
+            subject.persisted_environment
+          end
+
+          def self.matches?(build, user)
+            build.has_environment? && (build.created? || build.pending?)
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/ci/status/core.rb

@@ -66,6 +66,14 @@ module Gitlab
           raise NotImplementedError
         end
+        def has_deployments?
+          false
+        end
+
+        def environment
+          raise NotImplementedError
+        end
+
         # Hint that appears on all the pipeline graph tooltips and builds on the right sidebar in Job detail view
         def status_tooltip
           label