feat(cli): handle passing directories

import fs from "fs";

import glob from "glob";

import path from "path";

interface ExpandOptions {

	cwd?: string;

}

function isDirectory(filename: string): boolean {

	const st = fs.statSync(filename);

	return st.isDirectory();

}

/**

 * Takes a number of file patterns (globs) and returns array of expanded

 * filenames.

): string[] {

	const cwd = options.cwd || process.cwd();

	const files = patterns.reduce((files: string[], pattern: string) => {

	const files = patterns.reduce((result: string[], pattern: string) => {

		/* process - as standard input */

		if (pattern === "-") {

			pattern = "/dev/stdin";

		}

		return files.concat(glob.sync(pattern, { cwd }));

		for (const filename of glob.sync(pattern, { cwd })) {

			/* if file is a directory recursively expand files from it */

			const fullpath = path.join(cwd, filename);

			if (isDirectory(fullpath)) {

				const dir = expandFiles(

					["**"],

					Object.assign({}, options, { cwd: fullpath })

				);

				result = result.concat(dir.map(cur => path.join(filename, cur)));

				continue;

			}

			result.push(filename);

		}

		return result;

	}, []);

	/* only return unique matches */