mpc complete function for bash

.bashrc

function _mpc() {
  local cur prev temp word cword
  COMPREPLY=()
  cur=${COMP_WORDS[COMP_CWORD]}
  prev=${COMP_WORDS[COMP_CWORD-1]}
  if [ $COMP_CWORD -eq 1 ]; then
    COMPREPLY=( $(mpc --help 2>&1 | sed -n "s/^mpc \\($cur[a-z]\\+\\) .*$/\\1/p") )
    return
  elif [ $COMP_CWORD -eq 2 ]; then
    case "$prev" in
    ls|add)
      word=`echo $cur | sed 's/\\\\//g'`
      temp=`mktemp $$.XXXXXX`
      if [ "`echo "$word" | grep /`" != "" ]; then
        word=`echo "$word" | sed 's#\(.*\)/[^\/]*$#\1#'`
      else
        word=''
      fi
      mpc ls "$word" 2> /dev/null | grep "$cur" > $temp
      i=0
      while read line; do
        line=`echo $line | sed 's/ /\\\\ /g'`
        is_mp3=`echo $line | grep .mp3$`
        if [ $prev = ls ]; then
          if [ ! "$is_mp3" ]; then
            COMPREPLY[$i]=$line
            i=`expr $i + 1`
            COMPREPLY[$i]=$line/
            i=`expr $i + 1`
          fi
        else
          COMPREPLY[$i]=$line
          i=`expr $i + 1`
          if [ ! "$is_mp3" ]; then
            COMPREPLY[$i]=$line/
            i=`expr $i + 1`
          fi
        fi
      done < $temp
      rm -f $temp
      return 0
      ;;
    esac
  fi
  COMPREPLY=( $( compgen -f -- $cur ) )
  return 0
}
complete -F _mpc mpc