Bash script to push new releases easily

New Release.sh

#!/bin/bash

current_date=`date +%Y-%m-%d`

cd
# Replace with path to repository
cd projects/sandbox

git fetch --tags
latest=`git describe --abbrev=0`
tags_by_date=$(
    git for-each-ref --sort=taggerdate --format '%(tag)_,,,_%(taggerdate:raw)_,,,_%(taggername)_,,,_%(subject)' refs/tags \ | awk 'BEGIN { FS = "_,,,_"  } ; { t=strftime("%Y-%m-%d  %H:%M",$2); printf "%-20s %-18s %-25s %s\n", t, $1, $4, $3  }'
    )

next_version ()
{
  declare -a part=( ${1//\./ } )
  declare    new
  declare -i carry=1

  for (( CNTR=${#part[@]}-1; CNTR>=0; CNTR-=1 )); do
    len=${#part[CNTR]}
    new=$((part[CNTR]+carry))
    [ ${#new} -gt $len ] && carry=1 || carry=0
    [ $CNTR -gt 0 ] && part[CNTR]=${new: -len} || part[CNTR]=${new}
  done
  new="${part[*]}"
  echo -e "${new// /.}"
} 

version=v`next_version $latest`
read -e -i "$version" -p "Enter the version: " version_input
version=${input:-$version}

sha=`git rev-parse --short HEAD`
read -e -i "$sha" -p "Enter the commit hash: " sha_input
sha=${sha_input:-$sha}

build_num=$(echo "$tags_by_date" | grep -c "$current_date")
((build_num++))
read -e -i $build_num -p "Including this one, how many times have you pushed today? " build_num_input
BUILD_NUM=${build_num_input:-$build_num}

echo -e "\nNext version: $version"
echo "Production Release $build_num on $current_date"
echo "Latest commit $sha"

read -p "
OK?"

git tag -a $version -m "Production Release $build_num on $current_date" $sha
git push origin $version > /dev/null 2>&1

$SHELL