module Jeweler::VersionHelper::PlaintextExtension

def parse_plaintext
  plaintext = read_plaintext.chomp
  # http://rubular.com/regexes/10467 -> 3.5.4.a1
  # http://rubular.com/regexes/10468 -> 3.5.4
  if plaintext =~ /^(\d+)\.(\d+)\.(\d+)(?:\.(.*?))?$/
    @major = $1.to_i
    @minor = $2.to_i
    @patch = $3.to_i
    @build = $4
  end
end