Group similar builds

We group builds by removing from the builds name two numbers which are delimted by whitespace or colon:

• name 0 1 => name
• name 0:1 => name
• name 0/1 => name
• name 0:1 ruby => name ruby
• name 0/1 ruby => name ruby
• 0 1 name ruby => name ruby
• 0:1 name ruby => name ruby
• 0/1 name ruby => name ruby

Screenshot (currently it shows a number of grouped builds):

Screenshot with design update:

spec/views/projects/pipelines/show.html.haml_spec.rb

+require 'spec_helper'
+
+describe 'projects/pipelines/show' do
+  include Devise::TestHelpers
+
+  let(:project) { create(:project) }
+  let(:pipeline) do
+    create(:ci_empty_pipeline, project: project,
+           sha: project.commit.id)
+  end
+
+  before do
+    create_build('build', 0, 'build')
+    create_build('test', 1, 'rspec 0 2')
+    create_build('test', 1, 'rspec 1 2')
+    create_build('test', 1, 'audit')
+    create_build('deploy', 2, 'production')
+
+    create(:generic_commit_status, pipeline: pipeline, stage: 'external', name: 'jenkins', stage_idx: 3)
+
+    assign(:project, project)
+    assign(:pipeline, pipeline)
+
+    allow(view).to receive(:can?).and_return(true)
+  end
+
+  it 'shows a graph with grouped stages' do
+    render
+
+    expect(rendered).to have_css('.pipeline-graph')
+    expect(rendered).to have_css('.grouped-pipeline-dropdown')
+
+    # stages
+    expect(rendered).to have_text('Build')
+    expect(rendered).to have_text('Test')
+    expect(rendered).to have_text('Deploy')
+    expect(rendered).to have_text('External')
+
+    # builds
+    expect(rendered).to have_text('rspec')
+    expect(rendered).to have_text('rspec 0:1')
+    expect(rendered).to have_text('production')
+    expect(rendered).to have_text('jenkins')
+  end
+
+  private
+
+  def create_build(stage, stage_idx, name)
+    create(:ci_build, pipeline: pipeline, stage: stage, stage_idx: stage_idx, name: name)
+  end
+end