#!/usr/bin/env bash

# List directories sorted by size, find largest directories
# Author: Quanlong <kyan.ql.he@gmail.com>
# Version: v20170601
# 
# Upgrade with curl -o https://gist.github.com/cybertk/4b02531350c09235f3e2d00fdbb3bbcd/raw/36ebae4da87ea7fe504ba58c32c81060c62e6b8d/largest

list_dir_by_size() {
    declare dir="$1"

    echo "$dir"
    find "$dir" -type d -depth 1 -print0 | xargs -0 du -hs | gsort -hr
}

usage() {
    echo "largest <path_of_dir>"
    echo ""
    echo "List directories sorted by size"
}

main() {

    if [[ "$1" = "--help" || "$1" = "-h" ]]; then
        usage
        exit 1
    fi

    list_dir_by_size "${1:-$(pwd)}"
}

main "$@"