Bare-bones m3u generator

mkm3u.sh

#!/bin/bash
#################################################################
# mkm3u.sh - Bare-bones m3u generator
# Usage:
#   ./mkm3u.sh
# Setup:
#   1. Supply INPATHS. Paths which are relative
#      to this script will result in relative paths in the m3u
#   2. (Optional) Edit file extensions "mp3|flac|xm|s3m|mod|it"
#################################################################

INPATHS='
  path1
  path2
'

for INPATH in $INPATHS; do
  echo "[$(date)] Finding mp3/flac/etc in $INPATH ..."
  find $INPATH | grep -iE '\.(mp3|flac|xm|s3m|mod|it)$' >> "all.m3u.tmp"
done

echo "[$(date)] Saving to all.m3u"
mv "all.m3u.tmp" "all.m3u"