Fix CSS classes

app/helpers/builds_helper.rb

@@ -15,4 +15,11 @@ module BuildsHelper
       log_state: @build.trace_with_state[:state].to_s
     }
   end
+
+  def build_failed_issue_options
+    {
+      title: "Build Failed ##{@build.id}",
+      description: namespace_project_build_url(@project.namespace, @project, @build)
+    }
+  end
 end

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

-.content-block.build-header
+.content-block.build-header.top-area
   .header-content
     = render 'ci/status/badge', status: @build.detailed_status(current_user), link: false
     Job
@@ -16,7 +16,10 @@
     - if @build.user
       = render "user"
     = time_ago_with_tooltip(@build.created_at)
+  .nav-controls
+    - if can?(current_user, :create_issue, @project) && @build.failed?
+      = link_to "New issue", new_namespace_project_issue_path(@project.namespace, @project, issue: build_failed_issue_options), class: 'btn btn-new btn-inverted'
     - if can?(current_user, :update_build, @build) && @build.retryable?
-    = link_to "Retry job", retry_namespace_project_build_path(@project.namespace, @project, @build), class: 'btn btn-inverted-secondary pull-right', method: :post
+      = link_to "Retry job", retry_namespace_project_build_path(@project.namespace, @project, @build), class: 'btn btn-inverted-secondary', method: :post
   %button.btn.btn-default.pull-right.visible-xs-block.visible-sm-block.build-gutter-toggle.js-sidebar-build-toggle{ role: "button", type: "button" }
     = icon('angle-double-left')

changelogs/unreleased/25920-create-issue-from-failing-build.yml

+---
+title: Add button to create issue for failing build
+merge_request: 9391
+author: Alex Sanford

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

@@ -209,6 +209,10 @@ describe 'projects/builds/show', :view do
     it 'does not show retry button' do
       expect(rendered).not_to have_link('Retry')
     end
+
+    it 'does not show New issue button' do
+      expect(rendered).not_to have_link('New issue')
+    end
   end
 
   context 'when job is not running' do
@@ -220,6 +224,23 @@ describe 'projects/builds/show', :view do
     it 'shows retry button' do
       expect(rendered).to have_link('Retry')
     end
+
+    context 'if build passed' do
+      it 'does not show New issue button' do
+        expect(rendered).not_to have_link('New issue')
+      end
+    end
+
+    context 'if build failed' do
+      before do
+        build.status = 'failed'
+        render
+      end
+
+      it 'shows New issue button' do
+        expect(rendered).to have_link('New issue')
+      end
+    end
   end
 
   describe 'commit title in sidebar' do
@@ -248,4 +269,25 @@ describe 'projects/builds/show', :view do
       expect(rendered).to have_css('.js-build-value', visible: false, text: 'TRIGGER_VALUE_2')
     end
   end
+
+  describe 'New issue button' do
+    before do
+      build.status = 'failed'
+      render
+    end
+
+    it 'links to issues/new with the title and description filled in' do
+      title = "Build Failed ##{build.id}"
+      build_url = namespace_project_build_url(project.namespace, project, build)
+      href = new_namespace_project_issue_path(
+        project.namespace,
+        project,
+        issue: {
+          title: title,
+          description: build_url
+        }
+      )
+      expect(rendered).to have_link('New issue', href: href)
+    end
+  end
 end