make existing command safe

[MichaelDimmitt]

Cleanup last seven branches

instead of going ahead and deleting them.

first show the branches that will be deleted and ask the user if they want to proceed.

[MichaelDimmitt]

prompt_confirm() {
  while true; do
    read -r -n 1 -p "${1:-Continue?} [y/n]: " REPLY
    case $REPLY in
      [yY]) echo ; return 0 ;;
      [nN]) echo ; return 1 ;;
      *) printf " \033[31m %s \n\033[0m" "invalid input"
    esac 
  done  
}

# example usage
prompt_confirm "Overwrite File?" || exit 0

https://stackoverflow.com/a/32708121/5283424