git-arc script for archiving and restoring branches

git-arc

#!/bin/bash

usage() {
    (
        echo "usage: ${0##*/} COMMAND [args] [-h|--help]"
        echo "Tool for archiving and restoring git branches."
        (
            echo "    -h, --help@ show usage help"
            echo "    create BRANCH@ create an archive ref for the given branch"
            echo "    list@ list archived branches"
            echo "    delete REF@ delete the archive ref"
            echo "    restore REF@ restore the given ref"
        ) | column -ts@
    ) >&2
    exit 1
}

if echo "$*" | grep -Eq -- '--help\b|-h\b'; then
    usage
fi

case "$1" in
create)
    arg="$2"
    if [[ -z $arg ]]; then
        echo "$(tput bold)error: please provide a branch name to archive$(tput sgr0)" >&2
        exit 1
    fi
    git update-ref "refs/archive/$arg" "origin/$arg"
    git branch -D "$arg"
    ;;
list)
    git for-each-ref refs/archive
    ;;
delete)
    arg="$2"
    if [[ -z $arg ]]; then
        echo "$(tput bold)error: please provide a ref name to delete$(tput sgr0)" >&2
        exit 1
    fi
    git update-ref -d "$arg"
    ;;
restore)
    arg="$2"
    if [[ -z $arg ]]; then
        echo "$(tput bold)error: please provide a ref name to restore$(tput sgr0)" >&2
        exit 1
    fi
    git branch "$(echo "$arg" | cut -c14-)" "$arg"
    git update-ref -d "$arg"
    ;;
*)
    usage
    ;;
esac