a bash script which pulls from master branch and creates a new tag with a given name, deletes existing upon request

gistfile1.sh

#!/usr/bin/env bash
function quit {
   exit
}

function createTag(){
   echo "Changing to master branch for $1"
   cd "/$1"

   git status
   git checkout $BRANCH
   git pull origin $BRANCH
   LASTTAG=$(git describe --abbrev=0 --tags)
   PREVIOUSTAG=HEAD
   echo "Differences between  $LASTTAG and HEAD"
   git log $LASTTAG..HEAD --pretty=oneline > ../tag$PREVIOUSTAG$LASTTAG.$1.log
   #git log --pretty=oneline $LASTTAG...HEAD
   if [ $DELETEEXISTING == "y" ]; then
       git push --delete origin $TAG
       git tag --delete $TAG
   fi
   git tag $TAG
   git push origin $TAG
   if [ $? -eq 0 ]; then
       echo "OK for $1"
   else
       echo "Failed for $1"
   fi

}
echo -n "GIT TAG":
read TAG
echo -n "FROM WHICH BRANCH?"
read BRANCH
echo -n "DELETE EXISTING y or n":
read DELETEEXISTING
#LIST OF PROJECTS 
createTag ""

quit