#!/usr/bin/env bash

set -xeu

export EXTRA_LINUX_MODULES=()
export EXTRA_LINUX_BUILTIN=()
EXTRA_LINUX_CONFIG=()

for FILE in ./extra-configs/*.sh; do
    source "${FILE}"
done

if [[ "${EXTRA_LINUX_MODULES[*]}" != "" ]]; then
    for CONFIG_MODULE in "${EXTRA_LINUX_MODULES[@]}"; do
        EXTRA_LINUX_CONFIG+=("${CONFIG_MODULE}"'=m')
    done
fi

if [[ "${EXTRA_LINUX_BUILTIN[*]}" != "" ]]; then
    for CONFIG_BUILTIN in "${EXTRA_LINUX_BUILTIN[@]}"; do
        EXTRA_LINUX_CONFIG+=("${CONFIG_BUILTIN}"'=y')
    done
fi

function verify_config {
    [[ "${EXTRA_LINUX_CONFIG[*]}" == "" ]] && >&2 echo '**** WARNING: List of extra config options to check is empty, doing nothing.'

    if [[ ! -f .config ]]; then
        >&2 echo '**** ERROR: The config file could not be found.'
        exit 1
    fi

    for CONFIG_OPTION in "${EXTRA_LINUX_CONFIG[@]}"; do
        if ! grep "${CONFIG_OPTION}" .config 2>&1 /dev/null; then
            >&2 echo "**** ERROR: Config option '${CONFIG_OPTION}' not found in the config file."
            exit 1
        fi
    done
}