install-service

#!/bin/bash
PORT=8888
if [ $# -gt 0 ]; then PORT=$1; fi
PYTHON="$(which python3)"
if which realpath >/dev/null 2>&1; then
    DIR="$(realpath -- "$(dirname -- "${BASH_SOURCE[0]}")")"
else
    DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
fi

echo "Adding service to run:"
echo "'$PYTHON' '$DIR/server.py' --port $PORT >>'$DIR/output.log' 2>>'$DIR/error.log'"

if [ "$(uname -s)" == "Darwin" ]; then
    echo "using launchd (macOS)"
    SERVICE="/Library/LaunchDaemons/3d-print-server.plist"
    sudo tee "$SERVICE" >/dev/null <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>edu.moravian.cslab.3d-printer-server</string>
    <key>ServiceDescription</key>
    <string>3D Printer Server</string>
    <key>ProgramArguments</key>
    <array>
        <string>$PYTHON</string>
        <string>$DIR/server.py</string>
        <string>--port=$PORT</string>
    </array>
    <key>WorkingDirectory</key>
    <string>$DIR</string>
    <key>EnvironmentVariables</key>
    <dict>
        <key>PATH</key>
        <string>/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin</string>
    </dict>
    <key>StandardOutPath</key>
    <string>$DIR/output.log</string>
    <key>StandardErrorPath</key>
    <string>$DIR/error.log</string>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>
EOF
    sudo launchctl bootstrap system "$SERVICE"
else  # assume Linux with systemd
    echo "using systemd (Linux)"
    SERVICE="/etc/systemd/system/3d-print-server.service"
    sudo tee "$SERVICE" >/dev/null <<EOF
[Unit]
Description=3D Printer Server
Requires=network.target

[Service]
Type=exec
WorkingDirectory=$DIR
StandardOutput=append:$DIR/output.log
StandardError=append:$DIR/error.log
ExecStart="$PYTHON" "$DIR/server.py" --port=$PORT

[Install]
WantedBy=multi-user.target
EOF
    sudo systemctl enable --now 3d-print-server.service
fi