meta-id3v2

#!/bin/bash
# This script aims to make batch audio tagging a little easier
function usage {
  echo "Usage:"
  echo "  $ meta-id3v2 [ options ]"
  echo "Options:"
  echo "  -r \"<regex>\" \"<other>\""
  echo "    Change the id3v2 title tags according to <regex> matching the entire filename,"
  echo "    which captures a group that is the intended name.  Additionally, run <other> with id3v2."
  echo "  -t \"<regex>\" \"<other>\""
  echo "    Show the command(s) that will be run, were this given with -r"
  echo "    ***Don't trust that things weren't escaped right...escaping works better than it looks in the test..."
  echo "  -h"
  echo "    Display this usage message"
  echo ""
  echo "Example:"
  echo "  $ meta-id3v2 -t \"^..(.*)-.*$\" -A \"Cool Album Name\" -a \"Artist Name\""
  echo "    [confirm this ~= what you want]"
  echo "  $ meta-id3v2 -r \"^..(.*)-.*$\" -A \"Cool Album Name\" -a \"Artist Name\""
  exit $1
}
opt=$1
if [ "$opt" == "-h" ]
then
  usage 0
fi

regex=$2
shift
shift
extra=$@

if [ "$opt" == "-t" ]
then
  for filename in ./*; do
    if [ -f "$filename" ]
    then
      name=$filename
      title=`echo $name | sed -E "s/$regex/\1/"`
      echo id3v2 --song \"$title\" \"$filename\"
      if [ X"$extra" != X ]
      then
        echo id3v2 "$extra" \"$filename\"
      fi
    fi
  done
  exit 0
fi
if [ "$opt" == "-r" ]
then
  for filename in ./*; do
    if [ -f "$filename" ]
    then
      name=$filename
      title=`echo $name | sed -E "s/$regex/\1/"`
      id3v2 --song "$title" "$filename"
      if [ X"$extra" != X ]
      then
        id3v2 "$@" "$filename"
      fi
    fi
  done
  exit 0
fi
usage 1