class Webpacker::WebpackRunner

def node_modules_bin_exist?
  File.exist?("#{@node_modules_bin_path}/webpack")
end

def run
  env = Webpacker::Compiler.env
  cmd = if node_modules_bin_exist?
    ["#{@node_modules_bin_path}/webpack"]
  else
    ["yarn", "webpack"]
  end
  cmd += ["--config", @webpack_config] + @argv
  Dir.chdir(@app_path) do
    Kernel.exec env, *cmd
  end
end