Quickly dive into Java directories

dive.sh

dive() {
    start=$PWD

    if [ -z "$1" ] || [ ! -d "$1" ]; then
        return 1
    fi

    cd "$1"

    while [ true ]; do
        files=$(find -maxdepth 1 -mindepth 1 -type d)

        if [ -z "$files" ] || [ $(echo "$files" | wc -l) -ne 1 ]; then
            break
        fi

        cd $(echo "$files" | head -1)
    done

    realpath --relative-to=$start $PWD
}