#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
BASE="${BASE:-$(cd "$SCRIPT_DIR/.." && pwd)}"
LOGDIR="${LOGDIR:-$BASE/logs}"
mkdir -p "$LOGDIR"

LOG_PATH="$LOGDIR/build-detached-$(date +%Y%m%d_%H%M%S).log"
PIDFILE="$LOGDIR/build-detached.pid"

if [ -f "$PIDFILE" ]; then
  old_pid="$(cat "$PIDFILE" 2>/dev/null || true)"
  if [ -n "$old_pid" ] && kill -0 "$old_pid" 2>/dev/null; then
    echo "A build is already running: pid=$old_pid"
    echo "Log: $LOG_PATH"
    exit 0
  fi
fi

LOG_PATH="$LOG_PATH" nohup "$SCRIPT_DIR/build_bpi_m2c_rls25c.sh" >/dev/null 2>&1 &
pid=$!
echo "$pid" > "$PIDFILE"

echo "Started detached BPI-M2C build."
echo "pid=$pid"
echo "log=$LOG_PATH"