A menu for selecting branches to checkout

git-interactive-checkout.sh

#!/bin/bash
TITLE="Branch Selector"
MENU="Select a branch to checkout:"

DEFAULT_BRANCH=$(git symbolic-ref -q HEAD)
DEFAULT_BRANCH=${DEFAULT_BRANCH##refs/heads/}

DEFAULT=0
OPTIONS=()
tempBranches=()
BRANCHES=()
eval "$(git for-each-ref --shell --format='tempBranches+=(%(refname))' refs/heads/)"

i=0
max_width=0
for branch in "${tempBranches[@]}"; do
	OPTIONS+=($i)
	branch=${branch:11}
	BRANCHES+=($branch)
	OPTIONS+=($branch)

  if [ $branch = $DEFAULT_BRANCH ]; then
    DEFAULT=$i
  fi

	if [ "${#branch}" -gt "$max_width" ]; then
		max_width="${#branch}"
	fi

  i="$((i+1))"
done

WIDTH="$((max_width+9))"
CHOICE_HEIGHT="$((i))"
HEIGHT="$((CHOICE_HEIGHT+8))"

CHOICE=$(dialog --keep-tite\
                --clear \
                --title "$TITLE" \
                --default-item $DEFAULT \
                --menu "$MENU" \
                $HEIGHT $WIDTH $CHOICE_HEIGHT \
                "${OPTIONS[@]}" \
                2>&1 >/dev/tty)

if [[ "$CHOICE" == "" ]]; then
	exit 1
fi

git checkout ${BRANCHES[CHOICE]}