keystation88.sh

#!/bin/bash

RULE_FILE=/etc/udev/rules.d/00-keystation-88.rules
SERVICE_FILE=/etc/systemd/system/keystation88.service
SCRIPT_FILE=$(realpath "$0")

install() {
    cat >$RULE_FILE <<EOL
KERNEL=="dmmidi2", SUBSYSTEM=="sound", RUN+="$SCRIPT_FILE event"
EOL

    udevadm control --reload

    cat >$SERVICE_FILE <<EOL
[Unit]
Description=fluidsynth

[Service]
ExecStart=$(which fluidsynth) -i -s -a alsa -g 1 /usr/share/sounds/sf2/FluidR3_GM.sf2 -o audio.alsa.device=hw:1
ExecStartPost=/bin/sh -c 'while ! (aconnect -o | grep FLUID) </dev/null >/dev/null 2>&1; do sleep 0.2; done'
ExecStartPost=$(which aconnect) 24 128
[Install]
WantedBy=multi-user.target
EOL

    systemctl daemon-reload
}

uninstall() {
    rm -rf $RULE_FILE
    udevadm control --reload

    rm -rf $SCRIPT_FILE
    systemctl daemon-reload
}

start() {
    systemctl start keystation88.service
}

stop() {
    systemctl stop keystation88.service
}

case "$1" in
install) install ;;
start) start ;;
stop) stop ;;
event) if [ "add" == "${ACTION}" ]; then
    start
    else
    stop
fi;;
*)
    echo "usage: $0 install|start|stop|uninstall" >&2
    exit 1
    ;;
esac