Add configurable shared runners text

CHANGELOG

@@ -18,6 +18,8 @@ v 8.7.0 (unreleased)
   - Allow projects to be transfered to a lower visibility level group
   - Fix `signed_in_ip` being set to 127.0.0.1 when using a reverse proxy !3524
   - Improved Markdown rendering performance !3389
+  - Improved Markdown rendering performance !3389 (Yorick Peterse)
+  - Make shared runners text in box configurable (Kamil Trzciński)
   - Don't attempt to look up an avatar in repo if repo directory does not exist (Stan Hu)
   - API: Ability to subscribe and unsubscribe from issues and merge requests (Robert Schilling)
   - Expose project badges in project settings

app/controllers/admin/application_settings_controller.rb

@@ -75,6 +75,7 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
       :admin_notification_email,
       :user_oauth_applications,
       :shared_runners_enabled,
+      :shared_runners_text,
       :max_artifacts_size,
       :metrics_enabled,
       :metrics_host,

app/helpers/application_settings_helper.rb

@@ -15,6 +15,10 @@ module ApplicationSettingsHelper
     current_application_settings.sign_in_text
   end
 
+  def shared_runners_text
+    current_application_settings.shared_runners_text
+  end
+
   def user_oauth_applications?
     current_application_settings.user_oauth_applications
   end

app/views/admin/application_settings/_form.html.haml

@@ -153,7 +153,11 @@
           = f.label :shared_runners_enabled do
             = f.check_box :shared_runners_enabled
             Enable shared runners for new projects
-
+    .form-group
+      = f.label :shared_runners_text, class: 'control-label col-sm-2'
+      .col-sm-10
+        = f.text_area :shared_runners_text, class: 'form-control', rows: 4
+        .help-block Markdown enabled
     .form-group
       = f.label :max_artifacts_size, 'Maximum artifacts size (MB)', class: 'control-label col-sm-2'
       .col-sm-10

app/views/projects/runners/_shared_runners.html.haml

@@ -1,6 +1,9 @@
 %h3 Shared runners
 
-.bs-callout.bs-callout-warning
+.bs-callout.bs-callout-warning.shared-runners-description
+  - if shared_runners_text.present?
+    = markdown(shared_runners_text)
+  - else
     GitLab Runners do not offer secure isolation between projects that they do builds for. You are TRUSTING all GitLab users who can push code to project A, B or C to run shell scripts on the machine hosting runner X.
   %hr
   - if @project.shared_runners_enabled?

db/migrate/20160415133440_add_shared_runners_text_to_application_settings.rb

@@ -0,0 +1,5 @@
+class AddSharedRunnersTextToApplicationSettings < ActiveRecord::Migration
+  def change
+    add_column :application_settings, :shared_runners_text, :text
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160412140240) do
+ActiveRecord::Schema.define(version: 20160415133440) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -78,6 +78,7 @@ ActiveRecord::Schema.define(version: 20160412140240) do
     t.boolean  "email_author_in_body",              default: false
     t.integer  "default_group_visibility"
     t.boolean  "repository_checks_enabled",         default: true
+    t.text     "shared_runners_text"
   end
 
   create_table "audit_events", force: :cascade do |t|

spec/features/runners_spec.rb

@@ -80,6 +80,22 @@ describe "Runners" do
     end
   end
 
+  describe "shared runners description" do
+    let(:shared_runners_text) { 'custom shared runners description' }
+
+    before { stub_application_setting(shared_runners_text: shared_runners_text) }
+
+    before do
+      @project = FactoryGirl.create :empty_project, shared_runners_enabled: false
+      @project.team << [user, :master]
+      visit runners_path(@project)
+    end
+
+    it "sees shared runners description" do
+      expect(page.find(".shared-runners-description")).to have_content(shared_runners_text)
+    end
+  end
+
   describe "show page" do
     before do
       @project = FactoryGirl.create :empty_project