Creates a function to check if repo is EE

Adds EE information to gon
Creates a global vue mixin

app/assets/javascripts/lib/utils/common_utils.js

@@ -708,6 +708,14 @@ export const NavigationType = {
   TYPE_RESERVED: 255,
 };
 
+/**
+ * Returns the value of `gon.ee`
+ * Used to check if it's the EE codebase or the CE one.
+ *
+ * @returns Boolean
+ */
+export const isEE = () => window.gon && window.gon.ee;
+
 window.gl = window.gl || {};
 window.gl.utils = {
   ...(window.gl.utils || {}),

app/assets/javascripts/vue_shared/mixins/is_ee.js

+import Vue from 'vue';
+import { isEE } from '~/lib/utils/common_utils';
+
+Vue.mixin({
+  computed: {
+    isEE() {
+      return isEE();
+    },
+  },
+});

changelogs/unreleased/8711-prep-frontend-single-repo.yml

+---
+title: Creates a helper function to check if repo is EE
+merge_request: 25647
+author:
+type: other

lib/gitlab.rb

@@ -58,6 +58,10 @@ module Gitlab
     Rails.env.development? || org? || com?
   end
 
+  def self.ee?
+    Object.const_defined?(:License)
+  end
+
   def self.process_name
     return 'sidekiq' if Sidekiq.server?
     return 'console' if defined?(Rails::Console)

lib/gitlab/gon_helper.rb

@@ -25,6 +25,7 @@ module Gitlab
       gon.test_env               = Rails.env.test?
       gon.suggested_label_colors = LabelsHelper.suggested_colors
       gon.first_day_of_week      = current_user&.first_day_of_week || Gitlab::CurrentSettings.first_day_of_week
+      gon.ee                     = Gitlab.ee?
 
       if current_user
         gon.current_user_id = current_user.id

spec/javascripts/test_bundle.js

@@ -8,6 +8,7 @@ import '~/commons';
 import Vue from 'vue';
 import VueResource from 'vue-resource';
 import Translate from '~/vue_shared/translate';
+import CheckEE from '~/vue_shared/mixins/is_ee';
 import jasmineDiff from 'jasmine-diff';
 
 import { getDefaultAdapter } from '~/lib/utils/axios_utils';
@@ -43,6 +44,7 @@ Vue.config.errorHandler = function(err) {
 
 Vue.use(VueResource);
 Vue.use(Translate);
+Vue.use(CheckEE);
 
 // enable test fixtures
 jasmine.getFixtures().fixturesPath = FIXTURES_PATH;
@@ -67,6 +69,7 @@ window.gl = window.gl || {};
 window.gl.TEST_HOST = TEST_HOST;
 window.gon = window.gon || {};
 window.gon.test_env = true;
+window.gon.ee = false;
 gon.relative_url_root = '';
 
 let hasUnhandledPromiseRejections = false;

spec/lib/gitlab_spec.rb

@@ -95,4 +95,18 @@ describe Gitlab do
       expect(described_class.com?).to eq false
     end
   end
+
+  describe '.ee?' do
+    it 'returns true when using Enterprise Edition' do
+      stub_const('License', Class.new)
+
+      expect(described_class.ee?).to eq(true)
+    end
+
+    it 'returns false when using Community Edition' do
+      hide_const('License')
+
+      expect(described_class.ee?).to eq(false)
+    end
+  end
 end