#!/bin/bash
# pack-initramfs.sh — Repack modified rootfs into kubesolo-os.gz
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
ROOTFS_DIR="${ROOTFS_DIR:-$PROJECT_ROOT/build/rootfs-work}"
ROOTFS="$ROOTFS_DIR/rootfs"
OUTPUT="$ROOTFS_DIR/kubesolo-os.gz"

if [ ! -d "$ROOTFS" ]; then
    echo "ERROR: Rootfs not found: $ROOTFS"
    exit 1
fi

echo "==> Packing initramfs..."

cd "$ROOTFS"
find . | cpio -o -H newc 2>/dev/null | gzip -9 > "$OUTPUT"

echo "==> Built: $OUTPUT"
echo "    Size: $(du -h "$OUTPUT" | cut -f1)"
echo "    (Original Tiny Core core.gz is ~11 MB for reference)"