Add PipelineMessageType to GraphQL

* Remove read more link from the deprecation notice

app/graphql/types/ci/pipeline_message_type.rb

+# frozen_string_literal: true
+
+module Types
+  module Ci
+    # rubocop: disable Graphql/AuthorizeTypes
+    class PipelineMessageType < BaseObject
+      graphql_name 'PipelineMessage'
+
+      field :id, GraphQL::Types::ID, null: false,
+            description: 'ID of the pipeline message.'
+
+      field :content, GraphQL::Types::String, null: false,
+            description: 'Content of the pipeline message.'
+    end
+  end
+end

app/graphql/types/ci/pipeline_type.rb

@@ -172,6 +172,9 @@ module Types
             description: 'Reference path to the branch from which the pipeline was triggered.',
             method: :source_ref_path
 
+      field :warning_messages, [Types::Ci::PipelineMessageType], null: true,
+            description: 'Pipeline warning messages.'
+
       def detailed_status
         object.detailed_status(current_user)
       end

doc/api/graphql/reference/index.md

@@ -13017,6 +13017,7 @@ Represents a file or directory in the project repository that has been locked.
 | <a id="pipelineuser"></a>`user` | [`UserCore`](#usercore) | Pipeline user. |
 | <a id="pipelineuserpermissions"></a>`userPermissions` | [`PipelinePermissions!`](#pipelinepermissions) | Permissions for the current user on the resource. |
 | <a id="pipelineusesneeds"></a>`usesNeeds` | [`Boolean`](#boolean) | Indicates if the pipeline has jobs with `needs` dependencies. |
+| <a id="pipelinewarningmessages"></a>`warningMessages` | [`[PipelineMessage!]`](#pipelinemessage) | Pipeline warning messages. |
 | <a id="pipelinewarnings"></a>`warnings` | [`Boolean!`](#boolean) | Indicates if a pipeline has warnings. |
 
 #### Fields with arguments
@@ -13129,6 +13130,15 @@ Represents the Geo sync and verification state of a pipeline artifact.
 | <a id="pipelineartifactregistryretrycount"></a>`retryCount` | [`Int`](#int) | Number of consecutive failed sync attempts of the PipelineArtifactRegistry. |
 | <a id="pipelineartifactregistrystate"></a>`state` | [`RegistryState`](#registrystate) | Sync state of the PipelineArtifactRegistry. |
 
+### `PipelineMessage`
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="pipelinemessagecontent"></a>`content` | [`String!`](#string) | Content of the pipeline message. |
+| <a id="pipelinemessageid"></a>`id` | [`ID!`](#id) | ID of the pipeline message. |
+
 ### `PipelinePermissions`
 
 #### Fields

lib/gitlab/config/entry/node.rb

@@ -143,8 +143,7 @@ module Gitlab
           deprecation = entry.deprecation
           add_warning(
             "`#{entry.key}` is deprecated in " \
-            "#{deprecation[:deprecated]} and will be removed in #{deprecation[:removed]} " \
-            "- read more: #{deprecation[:documentation]}"
+            "#{deprecation[:deprecated]} and will be removed in #{deprecation[:removed]}."
           )
         end
       end

spec/factories/ci/pipeline_message.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :ci_pipeline_message, class: 'Ci::PipelineMessage' do
+    pipeline factory: :ci_pipeline
+    content { 'warning' }
+    severity { 1 }
+  end
+end

spec/graphql/types/ci/pipeline_message_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Types::Ci::PipelineMessageType do
+  specify { expect(described_class.graphql_name).to eq('PipelineMessage') }
+
+  it 'contains attributes related to a pipeline message' do
+    expected_fields = %w[
+      id content
+    ]
+
+    expect(described_class).to have_graphql_fields(*expected_fields)
+  end
+end

spec/graphql/types/ci/pipeline_type_spec.rb

@@ -14,7 +14,7 @@ RSpec.describe Types::Ci::PipelineType do
       coverage created_at updated_at started_at finished_at committed_at
       stages user retryable cancelable jobs source_job job job_artifacts downstream
       upstream path project active user_permissions warnings commit commit_path uses_needs
-      test_report_summary test_suite ref ref_path
+      test_report_summary test_suite ref ref_path warning_messages
     ]
 
     if Gitlab.ee?

spec/lib/gitlab/ci/config/entry/root_spec.rb

@@ -70,7 +70,7 @@ RSpec.describe Gitlab::Ci::Config::Entry::Root do
 
         it 'returns array of types as stages with a warning' do
           expect(root.stages_value).to eq %w[test deploy]
-          expect(root.warnings).to eq(["root `types` is deprecated in 9.0 and will be removed in 15.0 - read more: https://docs.gitlab.com/ee/ci/yaml/#deprecated-keywords"])
+          expect(root.warnings).to match_array(["root `types` is deprecated in 9.0 and will be removed in 15.0."])
         end
 
         it 'logs usage of types keyword' do

spec/requests/api/graphql/ci/config_spec.rb

@@ -233,7 +233,7 @@ RSpec.describe 'Query.ciConfig' do
     it 'returns a warning' do
       post_graphql_query
 
-      expect(graphql_data['ciConfig']['warnings']).to include('root `types` is deprecated in 9.0 and will be removed in 15.0 - read more: https://docs.gitlab.com/ee/ci/yaml/#deprecated-keywords')
+      expect(graphql_data['ciConfig']['warnings']).to include('root `types` is deprecated in 9.0 and will be removed in 15.0.')
     end
   end
 

spec/requests/api/graphql/ci/pipelines_spec.rb

@@ -283,6 +283,50 @@ RSpec.describe 'Query.project(fullPath).pipelines' do
     end
   end
 
+  describe 'warningMessages' do
+    let_it_be(:pipeline) { create(:ci_pipeline, project: project) }
+    let_it_be(:warning_message) { create(:ci_pipeline_message, pipeline: pipeline, content: 'warning') }
+
+    let(:pipelines_graphql_data) { graphql_data.dig(*%w[project pipelines nodes]).first }
+
+    let(:query) do
+      %(
+        query {
+          project(fullPath: "#{project.full_path}") {
+            pipelines {
+              nodes {
+                warningMessages {
+                  content
+                }
+              }
+            }
+          }
+        }
+      )
+    end
+
+    it 'returns pipeline warnings' do
+      post_graphql(query, current_user: user)
+
+      expect(pipelines_graphql_data['warningMessages']).to contain_exactly(
+        a_hash_including('content' => 'warning')
+      )
+    end
+
+    it 'avoids N+1 queries' do
+      control_count = ActiveRecord::QueryRecorder.new do
+        post_graphql(query, current_user: user)
+      end
+
+      pipeline_2 = create(:ci_pipeline, project: project)
+      create(:ci_pipeline_message, pipeline: pipeline_2, content: 'warning')
+
+      expect do
+        post_graphql(query, current_user: user)
+      end.not_to exceed_query_limit(control_count)
+    end
+  end
+
   describe '.jobs(securityReportTypes)' do
     let_it_be(:query) do
       %(