build_rootfs

#!/bin/bash

# Yêu cầu quyền sudo nếu không phải root
if [[ $EUID -ne 0 ]]; then
   echo "⚠️  This script must be run as root (sudo)" 
   exec sudo "$0" "$@"
   exit 1
fi

BUILD_DIR="build/rootfs"
CHROOT="build/chroot"
OUTPUT="releases/mini-os.iso"

set -e

rm -rf $BUILD_DIR
mkdir $BUILD_DIR
mkdir $BUILD_DIR/boot

# Tạo rootfs
bash clear_cache
echo "🧱 File size: $(du -sh $CHROOT)"
cp -a $CHROOT/* $BUILD_DIR

# Copy kernel và initrd
cp -a $CHROOT/boot/vmlinuz-6.8.0-64-generic $BUILD_DIR/boot/vmlinuz
cp -a $CHROOT/boot/initrd.img-6.8.0-64-generic $BUILD_DIR/boot/initrd

# update menu GRUB
mkdir -p $BUILD_DIR/boot/grub
cp -a config/grub_rootfs.cfg $BUILD_DIR/boot/grub/grub.cfg

#Build ISO boot
rm -rf $OUTPUT
grub-mkrescue -o $OUTPUT $BUILD_DIR --modules="linux normal iso9660 memdisk search tar ls" --xorriso=/usr/bin/xorriso
echo "✅ hoàn thành: $OUTPUT"