execaHook.js

// NOTE this workaround forces execa calls to be always sync
// Discussion: https://github.com/semantic-release/semantic-release/issues/193#issuecomment-462063871

const ritm = require("require-in-the-middle");
const execa = require("execa");

let interceptor;

const uncache = () => delete require.cache[require.resolve("execa")];

const getExecaSyncPromisified = () =>
	Object.assign((...args) => {
		const result = new Promise((resolve, reject) => {
			try {
				resolve(execa.sync(...args));
			} catch (e) {
				reject(e);
			}
		});

		result.stdout = new String("");
		result.stderr = new String("");
		result.stdout.pipe = () => {};
		result.stderr.pipe = () => {};

		return result;
	}, execa);

const hook = () => {
	if (interceptor) {
		return;
	}

	const execaHooked = getExecaSyncPromisified();

	interceptor = ritm(["execa"], () => execaHooked);
	uncache();

	console.log('"execa" hooked');
};

const unhook = () => {
	if (interceptor) {
		interceptor.unhook();
		interceptor = null;
		uncache();

		console.log('"execa" unhooked');
	}
};

module.exports = {
	hook,
	unhook
};