lyrics_editor

#!/bin/zsh
# Copyright 2017-2018 Han Boetes <han@boetes.org>
# For license info see http://unlicense.org/

# Check for dependencies.
for i in exiftool metaflac glyrc; do
    if ! command -v $i >& /dev/null; then
        faileddep=true
        echo "I need $i, please install it."
    fi
done

if [[ $faileddep == true ]]; then
    exit 1
fi

searchstring="$1"

readtag ()
{
    exiftool -q -q -p '$LYRICS' $1 > "${1}.txt"
}

write_flac_lyrics()
{
    metaflac --remove-tag=lyrics "$1"
    metaflac --set-tag-from-file="lyrics=${1}.txt" "$1"
}

write_mp3_lyrics()
{
    eyeD3 --remove-all-lyrics "$1"
    eyeD3 --add-lyrics "${1}.txt" "$1"
}



for i in *.(mp3|flac); do
    readtag "$i"
    if [[ -z $searchstring ]]; then
        $EDITOR "${i}.txt"
    else
        sed -i -n "/$searchstring/q;p" "${i}.txt"
    fi
    # Strip trailing whitespace.
    sed -i 's|[[:space:]]*$||' "${i}.txt"
    dos2unix "${i}.txt"
    # remove leading and trailing empty lines.
    sed -i -e :a -e '/./,$!d;/^\n*$/{$d;N;};/\n$/ba' "${i}.txt"

    case $i in
        *.flac)
            write_flac_lyrics "$i"
            ;;
        *.mp3)
            write_mp3_lyrics "$i"
            ;;
    esac
    rm -f -- "${i}.txt"
done