var releaseRegex = /release (..)/
var codenameRegex = /\((.*)\)/

module.exports = function fedoraCustomLogic(os,file,cb) {
  var release = file.match(releaseRegex)
  if(release && release.length === 2) os.release = release[1]
  var codename = file.match(codenameRegex)
  if(codename && codename.length === 2) os.codename = codename[1]
  cb(null,os)
}

var releaseRegex = /release ([^ ]+)/
var codenameRegex = /\((.*)\)/

module.exports = function fedoraCustomLogic(os,file,cb) {
  var release = file.match(releaseRegex)
  if(release && release.length === 2) os.release = release[1]
  var codename = file.match(codenameRegex)
  if(codename && codename.length === 2) os.codename = codename[1]
  cb(null,os)
}

tweak to release regex.