class Rufo::Command

def format_args(args)
  files = []
  args.each do |arg|
    if Dir.exist?(arg)
      files.concat Dir["#{arg}/**/*.rb"].select(&File.method(:file?))
    elsif File.exist?(arg)
      files << arg
    else
      STDERR.puts "Error: file or directory not found: #{arg}"
    end
  end
  changed = false
  files.each do |file|
    changed |= format_file file
  end
  exit 1 if changed
end