sizeup.bash

__sizeup_build_query () {
	local bool="and"
	local query=""
	for t in $@; do
		query="$query -$bool -iname \"*.$t\""
		bool="or"
	done
	echo -n "$query"
}

__sizeup_humanize () {
	local size=$1
	if [ $size -ge 1073741824 ]; then
		printf '%6.2f%s' $(echo "scale=2;$size/1073741824"| bc) G
	elif [ $size -ge 1048576 ]; then
		printf '%6.2f%s' $(echo "scale=2;$size/1048576"| bc) M
	elif [ $size -ge 1024 ]; then
		printf '%6.2f%s' $(echo "scale=2;$size/1024"| bc) K
	else
		printf '%6.2f%s' ${size} b
	fi
}

sizeup () {
	local helpstring="Show file sizes for all files with totals\n-r\treverse sort\n-[0-3]\tlimit depth (default 4 levels, 0=unlimited)\nAdditional arguments limit by file extension\n\nUsage: sizeup [-r[0123]] ext [,ext]"
	local totalb=0
	local size output reverse OPT
	local depth="-maxdepth 4"
	OPTIND=1
	while getopts "hr0123" opt; do
		case $opt in
			r) reverse="-r " ;;
			0) depth="" ;;
			1) depth="-maxdepth 1" ;;
			2) depth="-maxdepth 2" ;;
			3) depth="-maxdepth 3" ;;
			h) echo -e $helpstring; return;;
			\?) echo "Invalid option: -$OPTARG" >&2; return 1;;
		esac
	done
	shift $((OPTIND-1))

	[ ! -x "/usr/bin/bc" ] && echo -e "You need bc installed for the sizing your ups." && return # because you do and I didn't

#       local cmd="find . -type f ${depth}$(__sizeup_build_query $@)" # returned error "find: warning: you have specified the -maxdepth option after a non-option argument -type, but options are not positional (-maxdepth affects tests specified before it as well as those specified after it).  Please specify options before other arguments."
	local cmd="find . ${depth} -type f $(__sizeup_build_query $@)"
        local counter=0
        while read -r file; do
                counter=$(( $counter+1 ))
                if [[ $OS == Windows_NT ]]; then size=$(stat -c '%s' "$file");    # for cygwin
                else size=$(stat -f '%z' "$file"); fi # for not cygwin
		totalb=$(( $totalb+$size ))
		>&2 echo -ne $'\E[K\e[1;32m'"${counter}:"$'\e[1;31m'" $file "$'\e[0m'"("$'\e[1;31m'$size$'\e[0m'")"$'\r'
		# >&2 echo -n "$(__sizeup_humanize $totalb): $file ($size)"
		# >&2 echo -n $'\r'
		output="${output}${file#*/}*$size*$(__sizeup_humanize $size)\n"
	done < <(eval $cmd)
	>&2 echo -ne $'\r\E[K\e[0m'
	echo -e "$output"| sort -t '*' ${reverse}-nk 2 | cut -d '*' -f 1,3 | column -s '*' -t
	echo $'\e[1;33;40m'"Total: "$'\e[1;32;40m'"$(__sizeup_humanize $totalb)"$'\e[1;33;40m'" in $counter files"$'\e[0m'
}

Revised to add support in Cygwin.