#!/bin/sh

TARGET=$1
ROOTFS=$2
KERNEL_VERSION=$3

if [ ! -d "$TARGET" -o ! -d "$ROOTFS" ]; then
    echo "Usage: $0 <ramdisk_dir> <rootfs_dir> <version>"
    exit 255
fi

add_module() {
    for kmod in $(modprobe --dirname=${ROOTFS} --set-version="${KERNEL_VERSION}" --ignore-install --quiet --show-depends "$1" | awk '/^insmod/ { print $2 }'); do
        path=$(realpath --relative-to ${ROOTFS} ${kmod})
        if [ -e $TARGET/$path ]; then
            continue
        fi
        mkdir -p $TARGET/$(dirname $path)
        cp $kmod $TARGET/$(dirname $path)
    done
}

echo "Loading modules..."
for i in loop squashfs overlay; do
    add_module $i
done
mkdir -p $TARGET/lib/modules/${KERNEL_VERSION}/
cp ${ROOTFS}/lib/modules/${KERNEL_VERSION}/modules.dep $TARGET/lib/modules/${KERNEL_VERSION}/