mpd_cover.sh

#!/bin/bash

# Description:
# Script to query mpd's status and download a cover of the currently playing
# song on song-change and execute a user-defined command to show the cover.
# (e.g. with notify-send, by default with a image viewer for testing)


# Feel free to make your customizations here.
MPD_SERVER="--port 6600 --host localhost"  # For default case.
COVER_PATH="/tmp/cover.png"                # This should be okay for most.
CACHE_DIRP="/tmp"                          # You should set this to ~/.cache e.g
NOTIFY_COMMAND="sxiv $COVER_PATH"          # Place your command here (notify-send e.g.)

function mpc_send {
    mpc $MPD_SERVER $*
}

function show_metadata {
    glyrc cover \
        --write $COVER_PATH \
        --artist $1 --album $2 --title $3 \
        --cache $CACHE_DIRP \
        --verbosity 0

    $NOTIFY_COMMAND
}

function get_tag {
    mpc_send current --format "%"$1"%"
}

while [ 1 ]
do 
    psong=$(mpc_send current)
    event=$(mpc_send idle)

    if [[ $event = "player" ]]
    then
        if [[ $psong != $(mpc_send current) ]]
        then
            show_metadata $(get_tag artist) $(get_tag album) $(get_tag title)
        fi
    fi
done