command "change" do |c|
  c.syntax = "brief change ATTRIBUTE [OPTIONS]"
  c.description = "change attributes of brief documents"

  c.option "--from", String, "Only apply when the attributes current value matches."
  c.option "--to", String, "Only apply when the attributes current value matches."
  c.option "--files", String, "The files you want to change"
  c.option "--on", String, "alias for --files. The files you want to change"

  c.action do |args, options|
    puts "Args: #{ args.inspect }"
    puts "Options: #{ options.inspect }"
  end
end