Don't add bin/thrust if thruster is not in Gemfile

Author: etiennebarrie

railties/lib/rails/commands/app/update_command.rb

@@ -71,6 +71,7 @@ def generator_options
               skip_action_cable:   !defined?(ActionCable::Engine),
               skip_brakeman:       skip_gem?("brakeman"),
               skip_rubocop:        skip_gem?("rubocop"),
+              skip_thruster:       skip_gem?("thruster"),
               skip_test:           !defined?(Rails::TestUnitRailtie),
               skip_system_test:    Rails.application.config.generators.system_tests.nil?,
               skip_asset_pipeline: asset_pipeline.nil?,

railties/test/generators/app_generator_test.rb

@@ -304,6 +304,16 @@ def test_app_update_preserves_skip_rubocop
     end
   end
 
+  def test_app_update_preserves_skip_thruster
+    run_generator [ destination_root, "--skip-thruster" ]
+
+    FileUtils.cd(destination_root) do
+      assert_no_changes -> { File.exist?("bin/thrust") } do
+        run_app_update
+      end
+    end
+  end
+
   def test_app_update_preserves_skip_test
     run_generator [ destination_root, "--skip-test" ]