fix searching on empty project, prevent 500

app/services/search/project_service.rb

@@ -12,7 +12,13 @@ module Search
       return result unless query.present?
 
       if params[:search_code].present?
-        blobs = project.repository.search_files(query, params[:repository_ref]) unless project.empty_repo?
+        if !@project.empty_repo?
+          blobs = project.repository.search_files(query,
+                                                  params[:repository_ref])
+        else
+          blobs = Array.new
+        end
+
         blobs = Kaminari.paginate_array(blobs).page(params[:page]).per(20)
         result[:blobs] = blobs
         result[:total_results] = blobs.total_count

app/views/search/_project_results.html.haml

@@ -9,8 +9,11 @@
 .search_results
   - if params[:search_code].present?
     .blob-results
-      = render partial: "search/results/blob", collection: @search_results[:blobs]
-      = paginate @search_results[:blobs], theme: 'gitlab'
+      - if !@search_results[:blobs].empty?
+        = render partial: "search/results/blob", collection: @search_results[:blobs]
+        = paginate @search_results[:blobs], theme: 'gitlab'
+      - else
+        %span We couldn't find any matching code
   - else
     %ul.bordered-list
       = render partial: "search/results/merge_request", collection: @search_results[:merge_requests]

features/project/source/search_code.feature

 Feature: Project Search code
   Background:
     Given I sign in as a user
-    And I own project "Shop"
-    Given I visit project source page
 
   Scenario: Search for term "coffee"
+    Given I own project "Shop"
+    And I visit project source page
     When I search for term "coffee"
     Then I should see files from repository containing "coffee"
+
+  Scenario: Search on empty project
+    Given I own an empty project
+    And I visit my project's home page
+    When I search for term "coffee"
+    Then I should see empty result

features/steps/project/search_code.rb

@@ -3,14 +3,18 @@ class ProjectSearchCode < Spinach::FeatureSteps
   include SharedProject
   include SharedPaths
 
-  When 'I search for term "coffee"' do
+  step 'I search for term "coffee"' do
     fill_in "search", with: "coffee"
     click_button "Go"
     click_link 'Repository Code'
   end
 
-  Then 'I should see files from repository containing "coffee"' do
-    page.should have_content "coffee"
-    page.should have_content " CONTRIBUTING.md"
+  step 'I should see files from repository containing "coffee"' do
+    page.should have_content 'coffee'
+    page.should have_content 'CONTRIBUTING.md'
+  end
+
+  step 'I should see empty result' do
+    page.should have_content "We couldn't find any matching code"
   end
 end

features/steps/shared/project.rb

@@ -21,6 +21,13 @@ module SharedProject
     @project.team << [@user, :master]
   end
 
+  # Create an empty project without caring about the name
+  And 'I own an empty project' do
+    @project = create(:empty_project,
+                      name: 'Empty Project', namespace: @user.namespace)
+    @project.team << [@user, :master]
+  end
+
   And 'project "Shop" has push event' do
     @project = Project.find_by(name: "Shop")