class Rubycritic::SourceLocator

def expand_paths
  @initial_paths.map do |path|
    if File.directory?(path)
      Pathname.glob(File.join(path, RUBY_FILES))
    elsif File.exists?(path) && File.extname(path) == RUBY_EXTENSION
      Pathname.new(path)
    end
  end.flatten.compact.map(&:cleanpath).sort
end