How to use shebang-regex - 2 common examples

module.exports = (bin, shebang, code) => {
	if (!shebangRegex.test(shebang)) {
		shebang = '#!/usr/bin/env ' + shebang;
	}

	// On windows shebangs aren't supported. Use a fake extension to prevent
	// the bin from being executed instead of the shim.
	const fileName = bin + (process.platform === 'win32' ? '.x-mock-bin' : '');

	let oldPath = shell.env.PATH;

	return tempWrite(shebang + '\n' + code, fileName)
		.then(filepath => {
			// Path separator according to platform
			const sep = process.platform === 'win32' ? ';' : ':';
			shell.chmod('+x', filepath);
			shell.env.PATH = filepath.replace(new RegExp(fileName + '$'), '') + sep + oldPath;

parseShebang() {
    let shebangMatch = shebangRegex.exec(this.code);
    if (shebangMatch) {
      this.shebang = shebangMatch[0];
      this.code = this.code.replace(shebangRegex, "");
    }
  }