import type { NormalizedPackageJson } from 'read-pkg';
import type { Options, Rules } from 'remark-mdat';
import type { Simplify } from 'type-fest';
export type Config = Simplify<Options & {
    assetsPath?: string;
    packageFile?: string;
}>;
export type ConfigLoaded = {
    addMetaComment: boolean;
    assetsPath: string;
    closingPrefix: string;
    keywordPrefix: string;
    metaCommentIdentifier: string;
    packageFile: string | undefined;
    rules: Rules;
};
/**
 * Generously accept either string paths to .ts, .js, or .json files with
 * `Config` type default exports. Takes a single value, or an array of values which
 * will be merged right to left.
 */
export type ConfigToLoad = Array<Config | string> | Config | string;
/**
 * Generously accept either string paths to .ts, .js, or .json files with
 * `Rules` type default exports.
 */
export type RulesToLoad = Array<Rules | string> | Rules | string;
/**
 * Load and validate mdat configuration / rule sets
 * Uses cosmiconfig to search in the usual places.
 * Merge precedence: Additional Config Paths < Search Path < mdat-remark defaults
 *
 * Generic to accommodate additional Config options, so set T to your custom config type if needed. You must provide a matching configExtensionSchema as well.
 */
export declare function loadConfig(options?: {
    /**
     * Additional Config objects to merge.
     *
     * Strings are treated as paths to `ts`, `js`, or `json` files with `Config` type default exports. These will be dynamically loaded by Cosmiconfig.
     * Accepts an individual item, or an array. Objects in the array will be merged right to left.
     *
     */
    additionalConfig?: ConfigToLoad;
    /**
     * Additional Rules objects to merge.
     *
     * Strings are treated as paths to `ts`, `js`, or `json` files with `Rules` type default exports. These will be dynamically loaded by Cosmiconfig.
     * Accepts an individual item, or an array. Objects in the array will be merged right to left, and take precedence over any rules in previously loaded Config objects as well.
     */
    additionalRules?: RulesToLoad;
    /** Search for config in specific directories, mainly useful for testing. Cosmiconfig default search paths used if unset. */
    searchFrom?: string;
}): Promise<ConfigLoaded>;
/**
 * Get the current MDAT config object, loading it if necessary
 */
export declare function getConfig(): Promise<ConfigLoaded>;
/**
 * Convenience function for rules
 * Load as package json only as needed, memoize
 * Rules could call this themselves, but this is more convenient and efficient
 * @throws If no package.json is found
 */
export declare function getPackageJson(): Promise<NormalizedPackageJson>;
/**
 * Convenience function for merging configs
 * Performs a deep merge, with the rightmost object taking precedence
 */
export declare function mergeConfigs(a: Config, b: Config): Config;