Add notify_only_default_branch option to PipelinesEmailService

app/models/project_services/pipelines_email_service.rb

@@ -2,11 +2,11 @@
 
 class PipelinesEmailService < Service
   prop_accessor :recipients
-  boolean_accessor :notify_only_broken_pipelines
+  boolean_accessor :notify_only_broken_pipelines, :notify_only_default_branch
   validates :recipients, presence: true, if: :valid_recipients?
 
   def initialize_properties
-    self.properties ||= { notify_only_broken_pipelines: true }
+    self.properties ||= { notify_only_broken_pipelines: true, notify_only_default_branch: false }
   end
 
   def title
@@ -54,7 +54,9 @@ class PipelinesEmailService < Service
         placeholder: _('Emails separated by comma'),
         required: true },
       { type: 'checkbox',
-        name: 'notify_only_broken_pipelines' }
+        name: 'notify_only_broken_pipelines' },
+      { type: 'checkbox',
+        name: 'notify_only_default_branch' }
     ]
   end
 
@@ -67,6 +69,16 @@ class PipelinesEmailService < Service
   end
 
   def should_pipeline_be_notified?(data)
+    notify_for_pipeline_branch?(data) && notify_for_pipeline?(data)
+  end
+
+  def notify_for_pipeline_branch?(data)
+    return true unless notify_only_default_branch?
+
+    data[:object_attributes][:ref] == data[:project][:default_branch]
+  end
+
+  def notify_for_pipeline?(data)
     case data[:object_attributes][:status]
     when 'success'
       !notify_only_broken_pipelines?

changelogs/unreleased/pipelines-email-default-branch-filter.yml

+---
+title: Add notify_only_default_branch option to PipelinesEmailService
+merge_request: 28271
+author: Peter Marko
+type: added

doc/api/services.md

@@ -754,6 +754,7 @@ Parameters:
 | `recipients` | string | yes | Comma-separated list of recipient email addresses |
 | `add_pusher` | boolean | no | Add pusher to recipients list |
 | `notify_only_broken_pipelines` | boolean | no | Notify only broken pipelines |
+| `notify_only_default_branch` | boolean | no | Send notifications only for the default branch ([introduced in GitLab 12.0](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28271)) |
 
 ### Delete Pipeline-Emails service
 

lib/api/helpers/services_helpers.rb

@@ -563,6 +563,12 @@ module API
               name: :notify_only_broken_pipelines,
               type: Boolean,
               desc: 'Notify only broken pipelines'
+            },
+            {
+              required: false,
+              name: :notify_only_default_branch,
+              type: Boolean,
+              desc: 'Send notifications only for the default branch'
             }
           ],
           'pivotaltracker' => [

spec/models/project_services/pipelines_email_service_spec.rb

@@ -4,7 +4,11 @@ require 'spec_helper'
 
 describe PipelinesEmailService, :mailer do
   let(:pipeline) do
-    create(:ci_pipeline, project: project, sha: project.commit('master').sha)
+    create(:ci_pipeline, :failed,
+      project: project,
+      sha: project.commit('master').sha,
+      ref: project.default_branch
+    )
   end
 
   let(:project) { create(:project, :repository) }
@@ -84,12 +88,7 @@ describe PipelinesEmailService, :mailer do
       subject.test(data)
     end
 
-    context 'when pipeline is failed' do
-      before do
-        data[:object_attributes][:status] = 'failed'
-        pipeline.update(status: 'failed')
-      end
-
+    context 'when pipeline is failed and on default branch' do
       it_behaves_like 'sending email'
     end
 
@@ -101,6 +100,25 @@ describe PipelinesEmailService, :mailer do
 
       it_behaves_like 'sending email'
     end
+
+    context 'when pipeline is failed and on a non-default branch' do
+      before do
+        data[:object_attributes][:ref] = 'not-the-default-branch'
+        pipeline.update(ref: 'not-the-default-branch')
+      end
+
+      context 'with notify_only_default branch on' do
+        before do
+          subject.notify_only_default_branch = true
+        end
+
+        it_behaves_like 'sending email'
+      end
+
+      context 'with notify_only_default_branch off' do
+        it_behaves_like 'sending email'
+      end
+    end
   end
 
   describe '#execute' do
@@ -110,11 +128,6 @@ describe PipelinesEmailService, :mailer do
 
     context 'with recipients' do
       context 'with failed pipeline' do
-        before do
-          data[:object_attributes][:status] = 'failed'
-          pipeline.update(status: 'failed')
-        end
-
         it_behaves_like 'sending email'
       end
 
@@ -133,11 +146,6 @@ describe PipelinesEmailService, :mailer do
         end
 
         context 'with failed pipeline' do
-          before do
-            data[:object_attributes][:status] = 'failed'
-            pipeline.update(status: 'failed')
-          end
-
           it_behaves_like 'sending email'
         end
 
@@ -150,6 +158,40 @@ describe PipelinesEmailService, :mailer do
           it_behaves_like 'not sending email'
         end
       end
+
+      context 'with notify_only_default_branch off' do
+        context 'with default branch' do
+          it_behaves_like 'sending email'
+        end
+
+        context 'with non default branch' do
+          before do
+            data[:object_attributes][:ref] = 'not-the-default-branch'
+            pipeline.update(ref: 'not-the-default-branch')
+          end
+
+          it_behaves_like 'sending email'
+        end
+      end
+
+      context 'with notify_only_default_branch on' do
+        before do
+          subject.notify_only_default_branch = true
+        end
+
+        context 'with default branch' do
+          it_behaves_like 'sending email'
+        end
+
+        context 'with non default branch' do
+          before do
+            data[:object_attributes][:ref] = 'not-the-default-branch'
+            pipeline.update(ref: 'not-the-default-branch')
+          end
+
+          it_behaves_like 'not sending email'
+        end
+      end
     end
 
     context 'with empty recipients list' do