List all mp3s in a folder with title, artist, track and album metadata using ffmpeg

lsmp3.sh

#!/usr/bin/env bash

set -e

dir="$(pwd)"

if [ ! -z "$1" ]; then
	dir="$1"
fi

allSizes=()
allNames=()
allTitles=()
allArtists=()
allTracks=()
allAlbums=()

for file in "${dir}"/*.mp3; do
	fileName=$(basename -- "$file")
	ffProps=$(ffprobe "$file" 2>&1)
	title=$(echo "$ffProps" | sed -E -n 's/^ *title *: (.*)/\1/p')
	artist=$(echo "$ffProps" | sed -E -n 's/^ *artist *: (.*)/\1/p')
	track=$(echo "$ffProps" | sed -E -n 's/^ *track *: (.*)/\1/p')
	album=$(echo "$ffProps" | sed -E -n 's/^ *album *: (.*)/\1/p')

	allSizes+=( $(stat -c%s "$file" | numfmt --to=iec) )
	allNames+=( "${fileName}" )
	allTitles+=( "${title}" )
	allArtists+=( "${artist}" )
	allTracks+=( "${track}" )
	allAlbums+=( "${album}" )
done

colWidthSize=4
colWidthName=4
colWidthTitle=5
colWidthArtist=6
colWidthTrack=5
colWidthAlbum=5

for idx in ${!allNames[@]}; do
	size="${allSizes[idx]}"
	name="${allNames[idx]}"
	title="${allTitles[idx]}"
	artist="${allArtists[idx]}"
	track="${allTracks[idx]}"
	album="${allAlbums[idx]}"

	if [ ${#size} -gt $colWidthSize ]; then
		colWidthSize=${#size}
	fi
	if [ ${#name} -gt $colWidthName ]; then
		colWidthName=${#name}
	fi
	if [ ${#title} -gt $colWidthTitle ]; then
		colWidthTitle=${#title}
	fi
	if [ ${#artist} -gt $colWidthArtist ]; then
		colWidthArtist=${#artist}
	fi
	if [ ${#track} -gt $colWidthTrack ]; then
		colWidthTrack=${#track}
	fi
	if [ ${#album} -gt $colWidthAlbum ]; then
		colWidthAlbum=${#album}
	fi
done

printf "%${colWidthSize}s %-${colWidthName}s %-${colWidthTitle}s %-${colWidthArtist}s %-${colWidthTrack}s %-${colWidthAlbum}s\n" \
	"Size" \
	"Name" \
	"Title" \
	"Artist" \
	"Track" \
	"Album"

for idx in ${!allNames[@]}; do
	printf "%${colWidthSize}s %-${colWidthName}s %-${colWidthTitle}s %-${colWidthArtist}s %-${colWidthTrack}s %-${colWidthAlbum}s\n" \
		"${allSizes[idx]}" \
		"${allNames[idx]}" \
		"${allTitles[idx]}" \
		"${allArtists[idx]}" \
		"${allTracks[idx]}" \
		"${allAlbums[idx]}"
done