git-clean-branches

#!/bin/bash -e

valid_remote(){
	local remote=$1
	git remote -v | grep --q "^$remote" && return 0 || return 1
}

gone_branches(){
	local remote=$1
	git branch -vv | sed "s/^\*//"| grep "$remote/.*: gone]" | awk '{print $1}'
}

help_text(){
	echo "Checks what branches have be removed from the given remote"
	echo "and deletes them."
	echo
	echo "Usage: git clean-branches [-f] [-d] [remote]"
	echo "  -f  force deletes of the branches"
	echo "  -d  dry-run only list the branches to be deleted"
}

delete_flag='-d'

while getopts ":fd" opt; do
	case ${opt} in
		f )  delete_flag='-D'
			;;
		d )  dry_run='true'
			;;
		\? )
			help_text >&2 
			exit 1
			;;
	esac
done
shift $((OPTIND -1))

remote=$1

if [ -z "$remote" ]; then
	echo "no remote given defaulting to origin" >&2
	remote='origin'
fi

if ! valid_remote $remote; then
	echo "remote $remote is not listed in \`git remote -v\`" >&2
	exit 1
fi

if [ "$dry_run" == 'true' ]; then
	gone_branches $remote
	exit
fi

for branch in $(gone_branches $remote); do
	git branch $delete_flag "$branch"
done