Simple bash script to list and delete all git branches older than a certain amount of days. Default to 365 days (1 year)

delete-old-branches.sh

    #!/bin/bash
    DAYS=365
    RED='\033[0;31m'
    BLUE='\033[0;34m'
    GREEN='\033[0;32m'
    NC='\033[0m' # No Color
    git checkout development
    tarBranch=$(git branch -r --no-merged | grep -v master | grep -v developer | grep -v release | sed 's/origin\///')
    for branch in $tarBranch
    do
      lastDate=$(git show -s --format=%ci origin/$branch)
      convertDate=$(echo $lastDate | cut -d' ' -f 1 -f 2)
      Todate=`date -ju -f "%F %T" "$convertDate" "+%s"`
      current=$(date +'%s')
      day=$(( ( $current - $Todate )/60/60/24 ))
      if [ "$day" -gt $DAYS ]; then
        echo "last commit on ${BLUE}$branch${NC} was ${RED}$day${NC} days ago ====> ${RED}DELETE${NC}"
        git push origin :$branch
      else
        echo "last commit on ${BLUE}$branch${NC} was ${GREEN}$day${NC} days ago ====> ${GREEN}SKIP${NC}"
      fi
    done