Git local branches cleanup script

git-cleanup.sh

#!/bin/bash
SAVE_BRANCHES="master|production|testing"
#RU: этот скрипт удалит все локальные ветки КРОМЕ указанных в переменной SAVE_BRANCHES
#RU: если запустить его БЕЗ аргументов (./git-cleanup.sh) - он спросит разрешения и выведет
#RU: список удаляемых веток. C любым аргументом (./git-cleanup.sh 1) - удалит лишние ветки

#EN: This script will delete all local branches EXCEPT those in SAVE_BRANCHES_VAR
#EN: Running it without args will display deletion candidates and prompt you to action.
#EN: Running it with any arg (./git-cleanup.sh 1) will just delete those branches

# todo: declare -a SAVE_BRANCHES=$(cat .git-save-branches)


function delete_branches(){
    declare -a DEL_BRANCHES=`git branch | grep -E -v ".*(${SAVE_BRANCHES})$"`
    echo ${DEL_BRANCHES}
    DEL_BRANCHES_ARR=($(echo $DEL_BRANCHES | tr ' ' "\n"))
    for i in "${DEL_BRANCHES_ARR[@]}"
    do
         echo "> ${i}"
         git branch -D ${i}
         # or do whatever with individual element of the array
    done

}

function prompt_deletion(){
    while true; do
        echo "These local branches will be DELETED: "
        echo ""
        
        echo `git branch | grep -E -v ".*(${SAVE_BRANCHES})$"`
        echo ""
        read -p "Delete? [y/n]" yn
        
        case $yn in
            #[Yy]* ) echo `git branch -D | grep -E -v ".*(${SAVE_BRANCHES})$"`; git branch; break;;
            [Yy]* ) delete_branches;  break;;
            [Nn]* ) exit;;
            * ) echo "Please answer yes or no.";;
        esac
    done
}


if [ $# -eq 0 ]
    then
        prompt_deletion
    else
        delete_branches
fi