module RuboCop::PathUtil

def absolute?(path)
  path =~ %r{\A([A-Z]:)?/}
end

def match_path?(pattern, path)
  case pattern
  when String
    File.fnmatch?(pattern, path, File::FNM_PATHNAME)
  when Regexp
    path =~ pattern
  end
end

def relative_path(path, base_dir = Dir.pwd)
  # Optimization for the common case where path begins with the base
  # dir. Just cut off the first part.
  return path[(base_dir.length + 1)..-1] if path.start_with?(base_dir)
  path_name = Pathname.new(File.expand_path(path))
  path_name.relative_path_from(Pathname.new(base_dir)).to_s
end