Add application context metadata

for pipeline trigger API endpoint

app/services/ci/pipeline_trigger_service.rb

@@ -6,8 +6,10 @@ module Ci
 
     def execute
       if trigger_from_token
+        set_application_context_from_trigger(trigger_from_token)
         create_pipeline_from_trigger(trigger_from_token)
       elsif job_from_token
+        set_application_context_from_job(job_from_token)
         create_pipeline_from_job(job_from_token)
       end
 
@@ -87,5 +89,20 @@ module Ci
         value: params.except(*PAYLOAD_VARIABLE_HIDDEN_PARAMS).to_json,
         variable_type: :file }
     end
+
+    def set_application_context_from_trigger(trigger)
+      Gitlab::ApplicationContext.push(
+        user: trigger.owner,
+        project: trigger.project
+      )
+    end
+
+    def set_application_context_from_job(job)
+      Gitlab::ApplicationContext.push(
+        user: job.user,
+        project: job.project,
+        runner: job.runner
+      )
+    end
   end
 end

spec/requests/api/triggers_spec.rb

@@ -126,6 +126,39 @@ RSpec.describe API::Triggers do
       end
     end
 
+    describe 'adding arguments to the application context' do
+      subject { subject_proc.call }
+
+      let(:expected_params) { { client_id: "user/#{user.id}", project: project.full_path } }
+      let(:subject_proc) { proc { post api("/projects/#{project.id}/ref/master/trigger/pipeline?token=#{trigger_token}"), params: { ref: 'refs/heads/other-branch' } } }
+
+      context 'when triggering a pipeline from a trigger token' do
+        it_behaves_like 'storing arguments in the application context'
+        it_behaves_like 'not executing any extra queries for the application context'
+      end
+
+      context 'when triggered from another running job' do
+        let!(:trigger) { }
+        let!(:trigger_request) { }
+
+        context 'when other job is triggered by a user' do
+          let(:trigger_token) { create(:ci_build, :running, project: project, user: user).token }
+
+          it_behaves_like 'storing arguments in the application context'
+          it_behaves_like 'not executing any extra queries for the application context'
+        end
+
+        context 'when other job is triggered by a runner' do
+          let(:trigger_token) { create(:ci_build, :running, project: project, runner: runner).token }
+          let(:runner) { create(:ci_runner) }
+          let(:expected_params) { { client_id: "runner/#{runner.id}", project: project.full_path } }
+
+          it_behaves_like 'storing arguments in the application context'
+          it_behaves_like 'not executing any extra queries for the application context', 1
+        end
+      end
+    end
+
     context 'when is triggered by a pipeline hook' do
       it 'does not create a new pipeline' do
         expect do