module Travis::Tools::SafeString

def clean(string)
  colorized(string).gsub(/\e[^m]+m/, '')
end

def colorized(string)
  encoded(string).gsub(/[^[:print:]\e\n]/, '')
end

def encoded(string)
  return string unless string.respond_to? :encode
  string.encode 'utf-8'
rescue Encoding::UndefinedConversionError
  string.force_encoding 'utf-8'
end