rel(){
 if [ $# -eq 0 ]; then
   echo "Usage: rel tag"
   exit 1
 fi
 tag=${1}
 project=$( basename $( pwd ))
 
 if [ ! -f "${project}.setup" ]; then
  echo "Could not find setup-file ${project}.setup"
  exit 1
 fi
 
 sed  "s/(version .*)/(version \"${tag}\")/" ${project}.setup
 hg eggtag ${tag}
 hg push
}