Merge branch 'ci-setup-info' into 'master'

Add links to CI setup documentation from project settings and builds pages

For #14483 
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !3384

CHANGELOG

@@ -4,6 +4,7 @@ v 8.7.0 (unreleased)
   - Preserve time notes/comments have been updated at when moving issue
   - Make HTTP(s) label consistent on clone bar (Stan Hu)
   - Fix avatar stretching by providing a cropping feature
+  - Add links to CI setup documentation from project settings and builds pages
 
 v 8.6.2 (unreleased)
   - Comments on confidential issues don't show up in activity feed to non-members

app/models/repository.rb

@@ -467,6 +467,18 @@ class Repository
     end
   end
 
+  def gitlab_ci_yml
+    return nil if !exists? || empty?
+
+    @gitlab_ci_yml ||= tree(:head).blobs.find do |file|
+      file.name == '.gitlab-ci.yml'
+    end
+  rescue Rugged::ReferenceError
+    # For unknow reason spinach scenario "Scenario: I change project path"
+    # lead to "Reference 'HEAD' not found" exception from Repository#empty?
+    nil
+  end
+
   def head_commit
     @head_commit ||= commit(self.root_ref)
   end

app/views/projects/_builds_settings.html.haml

 %fieldset.builds-feature
   %legend
     Builds:
+
+  - unless @repository.gitlab_ci_yml
+    .form-group
+      .col-sm-offset-2.col-sm-10
+        %p Builds need to be configured before you can begin using Continuous Integration.
+        = link_to 'Get started with Builds', help_page_path('ci/quick_start', 'README'), class: 'btn btn-info'
+        %hr
+
   .form-group
     .col-sm-offset-2.col-sm-10
       %p Get recent application code using the following command:

app/views/projects/builds/index.html.haml

@@ -27,6 +27,9 @@
         = link_to 'Cancel running', cancel_all_namespace_project_builds_path(@project.namespace, @project),
           data: { confirm: 'Are you sure?' }, class: 'btn btn-danger', method: :post
 
+      - unless @repository.gitlab_ci_yml
+        = link_to 'Get started with Builds', help_page_path('ci/quick_start', 'README'), class: 'btn btn-info'
+
       = link_to ci_lint_path, class: 'btn btn-default' do
         = icon('wrench')
         %span CI Lint

spec/models/repository_spec.rb

@@ -2,6 +2,7 @@ require 'spec_helper'
 
 describe Repository, models: true do
   include RepoHelpers
+  TestBlob = Struct.new(:name)
 
   let(:repository) { create(:project).repository }
   let(:user) { create(:user) }
@@ -131,7 +132,6 @@ describe Repository, models: true do
   describe "#license" do
     before do
       repository.send(:cache).expire(:license)
-      TestBlob = Struct.new(:name)
     end
 
     it 'test selection preference' do
@@ -148,6 +148,25 @@ describe Repository, models: true do
     end
   end
 
+  describe "#gitlab_ci_yml" do
+    it 'returns valid file' do
+      files = [TestBlob.new('file'), TestBlob.new('.gitlab-ci.yml'), TestBlob.new('copying')]
+      expect(repository.tree).to receive(:blobs).and_return(files)
+
+      expect(repository.gitlab_ci_yml.name).to eq('.gitlab-ci.yml')
+    end
+
+    it 'returns nil if not exists' do
+      expect(repository.tree).to receive(:blobs).and_return([])
+      expect(repository.gitlab_ci_yml).to be_nil
+    end
+
+    it 'returns nil for empty repository' do
+      expect(repository).to receive(:empty?).and_return(true)
+      expect(repository.gitlab_ci_yml).to be_nil
+    end
+  end
+
   describe :add_branch do
     context 'when pre hooks were successful' do
       it 'should run without errors' do