Add pipeline.type key to PipelineEntity

This commit adds pipeline.type key to PipelineEntity.
This key will be used in MR widget in the next iteration.

app/models/ci/pipeline.rb

@@ -670,6 +670,7 @@ module Ci
         variables.append(key: 'CI_COMMIT_REF_PROTECTED', value: (!!protected_ref?).to_s)
         if merge_request_event? && merge_request
+          variables.append(key: 'CI_MERGE_REQUEST_EVENT_TYPE', value: merge_request_event_type.to_s)
           variables.append(key: 'CI_MERGE_REQUEST_SOURCE_BRANCH_SHA', value: source_sha.to_s)
           variables.append(key: 'CI_MERGE_REQUEST_TARGET_BRANCH_SHA', value: target_sha.to_s)
           variables.concat(merge_request.predefined_variables)
@@ -772,10 +773,18 @@ module Ci
       triggered_by_merge_request? && target_sha.present?
     end
+    def merge_train_pipeline?
+      merge_request_pipeline? && merge_train_ref?
+    end
+
     def merge_request_ref?
       MergeRequest.merge_request_ref?(ref)
     end
+    def merge_train_ref?
+      MergeRequest.merge_train_ref?(ref)
+    end
+
     def matches_sha_or_source_sha?(sha)
       self.sha == sha || self.source_sha == sha
     end
@@ -804,6 +813,20 @@ module Ci
       errors ? errors.full_messages.to_sentence : ""
     end
+    def merge_request_event_type
+      return unless merge_request_event?
+
+      strong_memoize(:merge_request_event_type) do
+        if detached_merge_request_pipeline?
+          :detached
+        elsif merge_request_pipeline?
+          :merged_result
+        elsif merge_train_pipeline?
+          :merge_train
+        end
+      end
+    end
+
     private
     def ci_yaml_from_repo

app/models/merge_request.rb

@@ -1142,6 +1142,10 @@ class MergeRequest < ApplicationRecord
     ref.start_with?("refs/#{Repository::REF_MERGE_REQUEST}/")
   end
+  def self.merge_train_ref?(ref)
+    %r{\Arefs/#{Repository::REF_MERGE_REQUEST}/\d+/train\z}.match?(ref)
+  end
+
   def in_locked_state
     begin
       lock_mr

app/presenters/ci/pipeline_presenter.rb

@@ -34,6 +34,18 @@ module Ci
       end
     end
+    NAMES = {
+      merge_train: s_('Pipeline|Merge train pipeline'),
+      merged_result: s_('Pipeline|Merged result pipeline'),
+      detached: s_('Pipeline|Detached merge request pipeline')
+    }.freeze
+
+    def name
+      # Currently, `merge_request_event_type` is the only source to name pipelines
+      # but this could be extended with the other types in the future.
+      NAMES.fetch(pipeline.merge_request_event_type, s_('Pipeline|Pipeline'))
+    end
+
     def ref_text
       if pipeline.detached_merge_request_pipeline?
         _("for %{link_to_merge_request} with %{link_to_merge_request_source_branch}").html_safe % { link_to_merge_request: link_to_merge_request, link_to_merge_request_source_branch: link_to_merge_request_source_branch }

app/serializers/pipeline_entity.rb

@@ -2,6 +2,9 @@
 class PipelineEntity < Grape::Entity
   include RequestAwareEntity
+  include Gitlab::Utils::StrongMemoize
+
+  delegate :name, :failure_reason, to: :presented_pipeline
   expose :id
   expose :user, using: UserEntity
@@ -36,6 +39,7 @@ class PipelineEntity < Grape::Entity
     expose :ordered_stages, as: :stages, using: StageEntity
     expose :duration
     expose :finished_at
+    expose :name
   end
   expose :merge_request, if: -> (*) { has_presentable_merge_request? }, with: MergeRequestForPipelineEntity do |pipeline|
@@ -59,13 +63,11 @@ class PipelineEntity < Grape::Entity
   end
   expose :commit, using: CommitEntity
+  expose :merge_request_event_type, if: -> (pipeline, _) { pipeline.merge_request_event? }
   expose :source_sha, if: -> (pipeline, _) { pipeline.merge_request_pipeline? }
   expose :target_sha, if: -> (pipeline, _) { pipeline.merge_request_pipeline? }
   expose :yaml_errors, if: -> (pipeline, _) { pipeline.has_yaml_errors? }
-
-  expose :failure_reason, if: -> (pipeline, _) { pipeline.failure_reason? } do |pipeline|
-    pipeline.present.failure_reason
-  end
+  expose :failure_reason, if: -> (pipeline, _) { pipeline.failure_reason? }
   expose :retry_path, if: -> (*) { can_retry? } do |pipeline|
     retry_project_pipeline_path(pipeline.project, pipeline)
@@ -97,4 +99,10 @@ class PipelineEntity < Grape::Entity
   def detailed_status
     pipeline.detailed_status(request.current_user)
   end
+
+  def presented_pipeline
+    strong_memoize(:presented_pipeline) do
+      pipeline.present
+    end
+  end
 end

locale/gitlab.pot

@@ -8182,6 +8182,9 @@ msgstr ""
 msgid "Pipeline|Coverage"
 msgstr ""
+msgid "Pipeline|Detached merge request pipeline"
+msgstr ""
+
 msgid "Pipeline|Duration"
 msgstr ""
@@ -8191,6 +8194,12 @@ msgstr ""
 msgid "Pipeline|Key"
 msgstr ""
+msgid "Pipeline|Merge train pipeline"
+msgstr ""
+
+msgid "Pipeline|Merged result pipeline"
+msgstr ""
+
 msgid "Pipeline|Pipeline"
 msgstr ""

spec/fixtures/api/schemas/pipeline.json

@@ -97,6 +97,10 @@
                     "id": "/properties/details/properties/finished_at",
                     "type": "string"
                 },
+                "name": {
+                    "id": "/properties/details/properties/name",
+                    "type": "string"
+                },
                 "manual_actions": {
                     "id": "/properties/details/properties/manual_actions",
                     "items": {},
@@ -323,6 +327,10 @@
             "id": "/properties/web_url",
             "type": "string"
         },
+        "merge_request_event_type": {
+            "id": "/properties/merge_request_event_type",
+            "type": "string"
+        },
         "user": {
             "id": "/properties/user",
             "properties": {

spec/models/ci/pipeline_spec.rb

@@ -323,6 +323,25 @@ describe Ci::Pipeline, :mailer do
     end
   end
+  describe '#merge_train_pipeline?' do
+    subject { pipeline.merge_train_pipeline? }
+
+    let!(:pipeline) do
+      create(:ci_pipeline, source: :merge_request_event, merge_request: merge_request, ref: ref, target_sha: 'xxx')
+    end
+
+    let(:merge_request) { create(:merge_request) }
+    let(:ref) { 'refs/merge-requests/1/train' }
+
+    it { is_expected.to be_truthy }
+
+    context 'when ref is merge ref' do
+      let(:ref) { 'refs/merge-requests/1/merge' }
+
+      it { is_expected.to be_falsy }
+    end
+  end
+
   describe '#merge_request_ref?' do
     subject { pipeline.merge_request_ref? }
@@ -333,6 +352,48 @@ describe Ci::Pipeline, :mailer do
     end
   end
+  describe '#merge_train_ref?' do
+    subject { pipeline.merge_train_ref? }
+
+    it 'calls Mergetrain#merge_train_ref?' do
+      expect(MergeRequest).to receive(:merge_train_ref?).with(pipeline.ref)
+
+      subject
+    end
+  end
+
+  describe '#merge_request_event_type' do
+    subject { pipeline.merge_request_event_type }
+
+    before do
+      allow(pipeline).to receive(:merge_request_event?) { true }
+    end
+
+    context 'when pipeline is merge train pipeline' do
+      before do
+        allow(pipeline).to receive(:merge_train_pipeline?) { true }
+      end
+
+      it { is_expected.to eq(:merge_train) }
+    end
+
+    context 'when pipeline is merge request pipeline' do
+      before do
+        allow(pipeline).to receive(:merge_request_pipeline?) { true }
+      end
+
+      it { is_expected.to eq(:merged_result) }
+    end
+
+    context 'when pipeline is detached merge request pipeline' do
+      before do
+        allow(pipeline).to receive(:detached_merge_request_pipeline?) { true }
+      end
+
+      it { is_expected.to eq(:detached) }
+    end
+  end
+
   describe '#legacy_detached_merge_request_pipeline?' do
     subject { pipeline.legacy_detached_merge_request_pipeline? }
@@ -782,7 +843,8 @@ describe Ci::Pipeline, :mailer do
             'CI_MERGE_REQUEST_TITLE' => merge_request.title,
             'CI_MERGE_REQUEST_ASSIGNEES' => merge_request.assignee_username_list,
             'CI_MERGE_REQUEST_MILESTONE' => milestone.title,
-            'CI_MERGE_REQUEST_LABELS' => labels.map(&:title).join(','))
+            'CI_MERGE_REQUEST_LABELS' => labels.map(&:title).join(','),
+            'CI_MERGE_REQUEST_EVENT_TYPE' => pipeline.merge_request_event_type.to_s)
       end
       context 'when source project does not exist' do

spec/models/merge_request_spec.rb

@@ -3195,6 +3195,40 @@ describe MergeRequest do
     end
   end
+  describe '.merge_train_ref?' do
+    subject { described_class.merge_train_ref?(ref) }
+
+    context 'when ref is ref name of a branch' do
+      let(:ref) { 'feature' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when ref is HEAD ref path of a branch' do
+      let(:ref) { 'refs/heads/feature' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when ref is HEAD ref path of a merge request' do
+      let(:ref) { 'refs/merge-requests/1/head' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when ref is merge ref path of a merge request' do
+      let(:ref) { 'refs/merge-requests/1/merge' }
+
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when ref is train ref path of a merge request' do
+      let(:ref) { 'refs/merge-requests/1/train' }
+
+      it { is_expected.to be_truthy }
+    end
+  end
+
   describe '#cleanup_refs' do
     subject { merge_request.cleanup_refs(only: only) }

spec/presenters/ci/pipeline_presenter_spec.rb

@@ -77,6 +77,40 @@ describe Ci::PipelinePresenter do
     end
   end
+  describe '#name' do
+    subject { presenter.name }
+
+    context 'when pipeline is detached merge request pipeline' do
+      let(:merge_request) { create(:merge_request, :with_detached_merge_request_pipeline) }
+      let(:pipeline) { merge_request.all_pipelines.last }
+
+      it { is_expected.to eq('Detached merge request pipeline') }
+    end
+
+    context 'when pipeline is merge request pipeline' do
+      let(:merge_request) { create(:merge_request, :with_merge_request_pipeline) }
+      let(:pipeline) { merge_request.all_pipelines.last }
+
+      it { is_expected.to eq('Merged result pipeline') }
+    end
+
+    context 'when pipeline is merge train pipeline' do
+      let(:pipeline) { create(:ci_pipeline, project: project) }
+
+      before do
+        allow(pipeline).to receive(:merge_request_event_type) { :merge_train }
+      end
+
+      it { is_expected.to eq('Merge train pipeline') }
+    end
+
+    context 'when pipeline is branch pipeline' do
+      let(:pipeline) { create(:ci_pipeline, project: project) }
+
+      it { is_expected.to eq('Pipeline') }
+    end
+  end
+
   describe '#ref_text' do
     subject { presenter.ref_text }

spec/serializers/pipeline_entity_spec.rb

@@ -41,7 +41,7 @@ describe PipelineEntity do
       it 'contains details' do
         expect(subject).to include :details
         expect(subject[:details])
-          .to include :duration, :finished_at
+          .to include :duration, :finished_at, :name
         expect(subject[:details][:status]).to include :icon, :favicon, :text, :label, :tooltip
       end
@@ -211,6 +211,10 @@ describe PipelineEntity do
         expect(subject[:source_sha]).to be_present
         expect(subject[:target_sha]).to be_present
       end
+
+      it 'exposes merge request event type' do
+        expect(subject[:merge_request_event_type]).to be_present
+      end
     end
   end
 end