module Thor::Actions

def find_in_source_paths(file)
  relative_root = relative_to_original_destination_root(destination_root, false)
  source_paths.each do |source|
    source_file = File.expand_path(file, File.join(source, relative_root))
    return source_file if File.exists?(source_file)
  end
  message = "Could not find #{file.inspect} in any of your source paths. "
  unless self.class.source_root
    message << "Please invoke #{self.class.name}.source_root(PATH) with the PATH containing your templates. "
  end
  if source_paths.empty?
    message << "Currently you have no source paths."
  else
    message << "Your current source paths are: \n#{source_paths.join("\n")}"
  end
  raise Error, message
end