Shell script to list MP3 files in the format "<title> (<minute:seconds lengh>)", as required by the MusicBrainz parser

mcblist

#!/bin/bash

GREP="grep"
GREP_E="not found"
CURDIR=`pwd`

TITLEINFO_1="beet info "
TITLEINFO_2=" | grep \"\ title:\" | awk -F':' '{print \$2 }' | sed 's/^ //g'"
TIMEINFO_1="mp3info -p \"\%S\""
TIMEINFO_2=""

function print_usage () {
    echo "Usage:"
    echo "    mbclist path"
}

function sec2minsec () {
	NUM=$1
	MIN=0
	HOUR=0
	DAY=0
	if ((NUM>59)) ; then
		((SEC=NUM%60))
		((NUM=NUM/60))
		if ((NUM>59)) ; then
			((MIN=NUM%60))
			((NUM=NUM/60))
			if ((NUM>23)) ; then
				((HOUR=NUM%24))
				((DAY=NUM/24))
			else
				((HOUR=NUM))
			fi
		else
			((MIN=NUM))
		fi
	else
		((SEC=NUM))
	fi
	echo "$MIN":"$SEC"
}

if [ "." == "$1" ] ; then
    DIR=`pwd`
else
    DIR=$1
fi

if [ ! -d "$DIR" ]; then
    echo "Error: Invalid directory."
    exit 1
fi

cd "$DIR"
for FILE in *; do
    TITLE=`bash -c "$TITLEINFO_1 \"$FILE\" $TITLEINFO_2"`
    TIME=`bash -c "$TIMEINFO_1 \"$FILE\" $TIMEINFO_2"`
    echo "$TITLE (`sec2minsec $TIME`)"
done
cd "$CURDIR"