bashrc: git-delivery shell function

git-delivery.sh

function git-delivery() {
    git status >/dev/null || return 1
    dtag=$(git describe --abbrev=0 --tags 2>/dev/null | git log -1 --pretty='%h')
    dext='tar'
    for i; do
	case $i in
	    -h|--help)
		cat <<EOF
usage: git-delivery [tag] [ext]

	tag: the tag or revision hash (default: $dtag)
	ext: the archive extension [zip|tar] (default: $dext)

EOF
		return 1
		;;
	esac
    done
    tag=$1; [ ! -z "$tag" ] || tag="${dtag}"
    ext=$2; [ ! -z "$ext" ] || ext="${dext}"
    top=$(git rev-parse --show-toplevel)
    base=$(basename "${top}")
    cd ${top}
    top=${top%.git}
    base=${base%.git}
    git archive $tag --prefix=$base-$tag/ -o $top-$tag.$ext
    return $?
}