if Rake::Task.task_defined?(“assets:precompile”)

Rake::Task['assets:precompile'].enhance do
  Railspacker.run Railspacker.before_assets_precompile_script
end

else

Rake::Task.define_task("assets:precompile") do
  Railspacker.run Railspacker.before_assets_precompile_script
end

end