#!/bin/bash
# Start the XBPS caching proxy in the background.
# Idempotent: does nothing if already running.
set -Eeuo pipefail

PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
CACHE_DIR="${XBPS_CACHE_DIR:-$PROJECT_DIR/cache/xbps-pkgs}"
PORT="${XBPS_PROXY_PORT:-3142}"
PIDFILE="${XBPS_PROXY_PIDFILE:-$PROJECT_DIR/out/xbps-proxy.pid}"
LOGFILE="${XBPS_PROXY_LOG:-$PROJECT_DIR/out/xbps-proxy.log}"

mkdir -p "$(dirname "$PIDFILE")" "$CACHE_DIR"

# Already running?
if [[ -f "$PIDFILE" ]] && kill -0 "$(cat "$PIDFILE")" 2>/dev/null; then
    echo ">>> XBPS proxy already running (pid $(cat "$PIDFILE"), port $PORT)"
    exit 0
fi

XBPS_CACHE_DIR="$CACHE_DIR" \
XBPS_PROXY_PORT="$PORT" \
    python3 "$PROJECT_DIR/tools/xbps-proxy.py" > "$LOGFILE" 2>&1 &
echo $! > "$PIDFILE"

# Wait for the socket to open (up to 5 s).
for i in $(seq 1 20); do
    if curl -sf --max-time 1 "http://127.0.0.1:$PORT/" >/dev/null 2>&1; then
        break
    fi
    sleep 0.25
done

echo ">>> XBPS proxy started (pid $(cat "$PIDFILE"), port $PORT)"
echo "    cache : $CACHE_DIR"
echo "    log   : $LOGFILE"