Fix missing pipeline duration for blocked pipelines

app/models/ci/pipeline.rb

@@ -75,6 +75,10 @@ module Ci
         pipeline.update_duration
       end
 
+      before_transition any => [:manual] do |pipeline|
+        pipeline.update_duration
+      end
+
       before_transition canceled: any - [:canceled] do |pipeline|
         pipeline.auto_canceled_by = nil
       end

spec/models/ci/pipeline_spec.rb

@@ -296,11 +296,12 @@ describe Ci::Pipeline, models: true do
 
   describe 'state machine' do
     let(:current) { Time.now.change(usec: 0) }
-    let(:build) { create_build('build1', 0) }
-    let(:build_b) { create_build('build2', 0) }
-    let(:build_c) { create_build('build3', 0) }
+    let(:build) { create_build('build1', queued_at: 0) }
+    let(:build_b) { create_build('build2', queued_at: 0) }
+    let(:build_c) { create_build('build3', queued_at: 0) }
 
     describe '#duration' do
+      context 'when multiple builds are finished' do
         before do
           travel_to(current + 30) do
             build.run!
@@ -325,6 +326,29 @@ describe Ci::Pipeline, models: true do
         end
       end
 
+      context 'when pipeline becomes blocked' do
+        let!(:build) { create_build('build:1') }
+        let!(:action) { create(:ci_build, :manual, pipeline: pipeline) }
+
+        before do
+          travel_to(current + 1.minute) do
+            build.run!
+          end
+
+          travel_to(current + 5.minutes) do
+            build.success!
+          end
+        end
+
+        it 'recalculates pipeline duration' do
+          pipeline.reload
+
+          expect(pipeline).to be_manual
+          expect(pipeline.duration).to eq 4.minutes
+        end
+      end
+    end
+
     describe '#started_at' do
       it 'updates on transitioning to running' do
         build.run
@@ -383,12 +407,13 @@ describe Ci::Pipeline, models: true do
       end
     end
 
-    def create_build(name, queued_at = current, started_from = 0)
+    def create_build(name, queued_at: current, started_from: 0, **opts)
       create(:ci_build,
              name: name,
              pipeline: pipeline,
              queued_at: queued_at,
-             started_at: queued_at + started_from)
+             started_at: queued_at + started_from,
+             **opts)
     end
   end