#!/usr/bin/env bash

set -euo pipefail

target=/etc/systemd/system/fifo.service

USER="rikka"
GROUP="rikka"
WORKDIR="/home/rikka/rgz"
EXECUTABLE="$WORKDIR/daemon"
tmp=$(mktemp)

trap 'rm -f "$tmp"' EXIT

cat > "$tmp" <<UNIT
[Unit]
Description=FIFO text processing daemon (systemd-managed)
After=network.target

[Service]
Type=simple
ExecStart=$EXECUTABLE 1000
User=$USER
Group=$GROUP
WorkingDirectory=$WORKDIR
KillSignal=SIGTERM
TimeoutStopSec=5s
KillMode=control-group
Restart=on-failure
RestartSec=1s

[Install]
WantedBy=multi-user.target
UNIT

sudo install -m 0644 "$tmp" "$target"
sudo systemctl daemon-reload
echo "Replaced \`$target\` with the predefined service unit."