yggdrasil/server/run.sh

#!/usr/bin/env bash
# Development launcher. Pick the service and port:
#
#   ./run.sh                  # main app on 8000
#   ./run.sh main 8000        # main app on 8000
#   ./run.sh sensors 8001     # sensors app on 8001 (localhost only)
#
# The main app calls the sensors API server-to-server. Override its address
# when the sensors app is not on localhost:8001:
#
#   SENSORS_API_URL=http://192.168.0.50:9001 ./run.sh main 8000
#
# The sensors API is open to every user on the local machine. To expose it
# on the network explicitly set HOST=0.0.0.0.
set -euo pipefail
cd "$(dirname "$0")"

APP="${1:-${APP:-main}}"
PORT="${2:-${PORT:-}}"

case "$APP" in
    main)
        MODULE="app:create_app"
        DEFAULT_PORT=8000
        DEFAULT_HOST="0.0.0.0"
        ;;
    sensors)
        MODULE="sensors_app:create_app"
        DEFAULT_PORT=8001
        DEFAULT_HOST="127.0.0.1"
        ;;
    *)
        echo "Usage: $0 [main|sensors] [port]" >&2
        exit 2
        ;;
esac

PORT="${PORT:-$DEFAULT_PORT}"
HOST="${HOST:-$DEFAULT_HOST}"

# Prevent the main app from proxying to itself. Without an explicit
# SENSORS_API_URL the client targets localhost:8001, so main must not listen
# there as well.
if [ "$APP" = "main" ] && [ -z "${SENSORS_API_URL:-}" ] && [ "$PORT" = "8001" ]; then
    echo "Refusing to start main on port 8001: SENSORS_API_URL would default to" >&2
    echo "http://localhost:8001 and the app would call itself recursively." >&2
    echo "Use another port (for example 8000) or set SENSORS_API_URL explicitly." >&2
    exit 2
fi

if [ -x ".venv/bin/python" ]; then
    PYTHON=".venv/bin/python"
else
    PYTHON="python3"
fi

echo "Starting $APP app on http://$HOST:$PORT" >&2
exec "$PYTHON" -m flask --app "$MODULE" run --host "$HOST" --port "$PORT" --debug