Remove main_language and tests

app/models/repository.rb

@@ -972,12 +972,6 @@ class Repository
     end
   end
 
-  def main_language
-    return unless head_exists?
-
-    Linguist::Repository.new(rugged, rugged.head.target_id).language
-  end
-
   def avatar
     return nil unless exists?
 

app/services/git_push_service.rb

@@ -53,10 +53,6 @@ class GitPushService < BaseService
     # could cause the last commit of a merge request to change.
     update_merge_requests
 
-    # Checks if the main language has changed in the project and if so
-    # it updates it accordingly
-    update_main_language
-
     perform_housekeeping
   end
 
@@ -64,19 +60,6 @@ class GitPushService < BaseService
     @project.repository.copy_gitattributes(params[:ref])
   end
 
-  def update_main_language
-    # Performance can be bad so for now only check main_language once
-    # See https://gitlab.com/gitlab-org/gitlab-ce/issues/14937
-    return if @project.main_language.present?
-
-    return unless is_default_branch?
-    return unless push_to_new_branch? || push_to_existing_branch?
-
-    current_language = @project.repository.main_language
-    @project.update_attributes(main_language: current_language)
-    true
-  end
-
   protected
 
   def update_merge_requests

app/views/shared/projects/_project.html.haml

@@ -12,9 +12,6 @@
 %li.project-row{ class: css_class }
   = cache(cache_key) do
     .controls
-      - if project.main_language
-        %span
-          = project.main_language
       - if project.commit.try(:status)
         %span
           = render_commit_status(project.commit)

db/migrate/20160525205328_remove_main_language_from_projects.rb

@@ -0,0 +1,21 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveMainLanguageFromProjects < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def change
+    remove_column :projects, :main_language
+  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: 20160516174813) do
+ActiveRecord::Schema.define(version: 20160525205328) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -760,7 +760,6 @@ ActiveRecord::Schema.define(version: 20160516174813) do
     t.integer  "build_timeout",                default: 3600,     null: false
     t.boolean  "pending_delete",               default: false
     t.boolean  "public_builds",                default: true,     null: false
-    t.string   "main_language"
     t.integer  "pushes_since_gc",              default: 0
     t.boolean  "last_repository_check_failed"
     t.datetime "last_repository_check_at"

spec/features/issues/filter_issues_spec.rb

@@ -186,7 +186,7 @@ describe 'Filter issues', feature: true do
         fill_in 'issue_search', with: 'testing'
 
         page.within '.issues-list' do
-          expect(page).to_not have_selector('.issue')
+          expect(page).not_to have_selector('.issue')
         end
       end
     end

spec/models/repository_spec.rb

@@ -829,18 +829,6 @@ describe Repository, models: true do
     end
   end
 
-  describe "#main_language" do
-    it 'shows the main language of the project' do
-      expect(repository.main_language).to eq("Ruby")
-    end
-
-    it 'returns nil when the repository is empty' do
-      allow(repository).to receive(:empty?).and_return(true)
-
-      expect(repository.main_language).to be_nil
-    end
-  end
-
   describe '#before_remove_tag' do
     it 'flushes the tag cache' do
       expect(repository).to receive(:expire_tag_count_cache)

spec/services/git_push_service_spec.rb

@@ -158,49 +158,6 @@ describe GitPushService, services: true do
     end
   end
 
-  describe "Updates main language" do
-    context "before push" do
-      it { expect(project.main_language).to eq(nil) }
-    end
-
-    context "after push" do
-      def execute
-        execute_service(project, user, @oldrev, @newrev, ref)
-      end
-
-      context "to master" do
-        let(:ref) { @ref }
-
-        context 'when main_language is nil' do
-          it 'obtains the language from the repository' do
-            expect(project.repository).to receive(:main_language)
-            execute
-          end
-
-          it 'sets the project main language' do
-            execute
-            expect(project.main_language).to eq("Ruby")
-          end
-        end
-
-        context 'when main_language is already set' do
-          it 'does not check the repository' do
-            execute # do an initial run to simulate lang being preset
-            expect(project.repository).not_to receive(:main_language)
-            execute
-          end
-        end
-      end
-
-      context "to other branch" do
-        let(:ref) { 'refs/heads/feature/branch' }
-
-        it { expect(project.main_language).to eq(nil) }
-      end
-    end
-  end
-
-
   describe "Updates git attributes" do
     context "for default branch" do
       it "calls the copy attributes method for the first push to the default branch" do