import Parser from './Parser';
import { SoftwarePackage } from '@stencila/schema';
/**
 * Dockter `Parser` class for R requirements files and source code.
 *
 * For each package, meta-data is obtained from http://crandb.r-pkg.org and used to create a `SoftwarePackage` instance
 * using crosswalks from column "R Package Description" in https://github.com/codemeta/codemeta/blob/master/crosswalk.csv
 *
 * System dependencies for each package are obtained from https://sysreqs.r-hub.io.
 */
export default class RParser extends Parser {
    /**
     * Parse a folder by detecting any R requirements or source code files
     * and return a `SoftwarePackage` instance
     */
    parse(): Promise<SoftwarePackage | null>;
    /**
     * Create a `SoftwarePackage` instance from a R package name
     *
     * This method fetches meta-data for a R package to populate the properties
     * of a `SoftwarePackage` instance. It recursively fetches meta-data on the package's
     * dependencies, including system dependencies.
     *
     * @param name Name of the R package
     */
    private createPackage;
}