Prompt to delete each branch

gbdp.sh

#!/bin/sh

function prompt {
	printf "Do you want to delete $1? (y/N)? "
	read -r answer
	if echo "$answer" | grep -iq "^y" ;then
	    git branch -D $1
	fi
}

permanent=(master develop)

for branch in $(git branch | cut -c 3-) ; do
	if ! [[ ${permanent[*]} =~ "$branch" ]]; then
		prompt "$branch"
	fi
done