#!/bin/sh
# setup-builder.sh — prepare Debian 12 host/VM as bee ISO builder
#
# Run once on a fresh Debian 12 (Bookworm) host/VM as root.
# After this script completes, the machine can build bee ISO images directly.
# Container alternative: use `iso/builder/build-in-container.sh`.
#
# Usage (on Debian VM):
#   wget -O- https://git.mchus.pro/mchus/bee/raw/branch/main/iso/builder/setup-builder.sh | sh
#   or: sh setup-builder.sh

set -e

. "$(dirname "$0")/VERSIONS" 2>/dev/null || true
GO_VERSION="${GO_VERSION:-1.24.0}"
DEBIAN_VERSION="${DEBIAN_VERSION:-12}"
DEBIAN_KERNEL_ABI="${DEBIAN_KERNEL_ABI:-6.1.0-28}"

echo "=== bee builder setup ==="
echo "Debian: $(cat /etc/debian_version)"
echo "Go target: ${GO_VERSION}"
echo "Kernel ABI: ${DEBIAN_KERNEL_ABI}"
echo ""

# --- system packages ---
export DEBIAN_FRONTEND=noninteractive
apt-get update -qq

apt-get install -y \
    live-build \
    debootstrap \
    squashfs-tools \
    xorriso \
    grub-pc-bin \
    grub-efi-amd64-bin \
    mtools \
    git \
    wget \
    curl \
    tar \
    xz-utils \
    screen \
    rsync \
    build-essential \
    gcc \
    make \
    perl \
    "linux-headers-${DEBIAN_KERNEL_ABI}-amd64"

echo "linux-headers installed: $(dpkg -l "linux-headers-${DEBIAN_KERNEL_ABI}-amd64" | awk '/^ii/{print $3}')"

# --- Go toolchain ---
echo ""
echo "=== installing Go ${GO_VERSION} ==="
if [ -d /usr/local/go ] && /usr/local/go/bin/go version 2>/dev/null | grep -q "${GO_VERSION}"; then
    echo "Go ${GO_VERSION} already installed"
else
    ARCH=$(uname -m)
    case "$ARCH" in
        x86_64) GOARCH=amd64 ;;
        aarch64) GOARCH=arm64 ;;
        *) echo "unsupported arch: $ARCH"; exit 1 ;;
    esac
    wget -O /tmp/go.tar.gz \
        "https://go.dev/dl/go${GO_VERSION}.linux-${GOARCH}.tar.gz"
    rm -rf /usr/local/go
    tar -C /usr/local -xzf /tmp/go.tar.gz
    rm /tmp/go.tar.gz
fi
export PATH="$PATH:/usr/local/go/bin"
echo "Go: $(go version)"

echo ""
echo "=== builder setup complete ==="
echo "Next: sh iso/builder/build.sh"