#!/usr/bin/env bash

#set -x

set -u

#PATH=/var/tmp:$PATH
#export PATH

if [ "$#" != 0 ]
then
	hierarchy=("$@")
else
	hierarchy=($(df-local | grep -vi '^filesystem' | sort | awk '{ print $6 }'))
fi
numhierarchies="${#hierarchy[@]}"
echo Checking "$numhierarchies" hierarchies: "${hierarchy[@]}"... | fmt 1>&2  

# list all directories in local hierarchies according to df-local
for fsno in $(seq 0 $[$numhierarchies-1])
do
	h=${hierarchy[$fsno]}
	echo Examining hierarchy $[$fsno+1] of $numhierarchies, AKA "$h" | fmt 1>&2
	if ! cd "$h"
	then
		echo Error, could not cd to mount point "$h" 1>&2
		continue
	fi
	find "$h" -xdev -type f -print0
done | \
	dir-sizes2 | \
	highest -n 25