module Hoe::Package

def prerelease_version # :nodoc:
  pre = ENV['PRERELEASE'] || ENV['PRE']
  if pre then
    spec.version.version << "." << pre if pre
    abort "ERROR: You should format PRE like pre or alpha.1 or something" if
      (Gem::VERSION < "1.4"  and pre !~ /^[a-z]+(\.\d+)?$/) or
      (Gem::VERSION >= "1.4" and pre !~ /^[a-z]+(\.?\d+)?$/)
  end
end