mathjs/examples/node_modules/shebang-command/index.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

'use strict';
const shebangRegex = require('shebang-regex');

module.exports = (string = '') => {
	const match = string.match(shebangRegex);

	if (!match) {
		return null;
	}

	const [path, argument] = match[0].replace(/#! ?/, '').split(' ');
	const binary = path.split('/').pop();

	if (binary === 'env') {
		return argument;
	}

	return argument ? `${binary} ${argument}` : binary;
};