Fix config variables when having includes

When implementing config variables, we did not pass necessary parameters
to yaml processor.

app/controllers/projects/pipelines_controller.rb

@@ -214,7 +214,7 @@ class Projects::PipelinesController < Projects::ApplicationController
   def config_variables
     respond_to do |format|
       format.json do
-        render json: Ci::ListConfigVariablesService.new(@project).execute(params[:sha])
+        render json: Ci::ListConfigVariablesService.new(@project, current_user).execute(params[:sha])
       end
     end
   end

app/services/ci/list_config_variables_service.rb

@@ -6,7 +6,10 @@ module Ci
       config = project.ci_config_for(sha)
       return {} unless config
 
-      result = Gitlab::Ci::YamlProcessor.new(config).execute
+      result = Gitlab::Ci::YamlProcessor.new(config, project: project,
+                                                     user:    current_user,
+                                                     sha:     sha).execute
+
       result.valid? ? result.variables_with_data : {}
     end
   end

changelogs/unreleased/30101-fix-includes.yml

+---
+title: Fix config variables when having includes
+merge_request: 47189
+author:
+type: fixed

spec/services/ci/list_config_variables_service_spec.rb

@@ -3,8 +3,9 @@
 require 'spec_helper'
 
 RSpec.describe Ci::ListConfigVariablesService do
-  let_it_be(:project) { create(:project, :repository) }
-  let(:service) { described_class.new(project) }
+  let(:project) { create(:project, :repository) }
+  let(:user) { project.creator }
+  let(:service) { described_class.new(project, user) }
   let(:result) { YAML.dump(ci_config) }
 
   subject { service.execute(sha) }
@@ -38,6 +39,40 @@ RSpec.describe Ci::ListConfigVariablesService do
     end
   end
 
+  context 'when config has includes' do
+    let(:sha) { 'master' }
+    let(:ci_config) do
+      {
+        include: [{ local: 'other_file.yml' }],
+        variables: {
+          KEY1: { value: 'val 1', description: 'description 1' }
+        },
+        test: {
+          stage: 'test',
+          script: 'echo'
+        }
+      }
+    end
+
+    before do
+      allow_next_instance_of(Repository) do |repository|
+        allow(repository).to receive(:blob_data_at).with(sha, 'other_file.yml') do
+          <<~HEREDOC
+            variables:
+              KEY2:
+                value: 'val 2'
+                description: 'description 2'
+          HEREDOC
+        end
+      end
+    end
+
+    it 'returns variable list' do
+      expect(subject['KEY1']).to eq({ value: 'val 1', description: 'description 1' })
+      expect(subject['KEY2']).to eq({ value: 'val 2', description: 'description 2' })
+    end
+  end
+
   context 'when sending an invalid sha' do
     let(:sha) { 'invalid-sha' }
     let(:ci_config) { nil }