execa/lib/utils/max-listeners.js

Process execution for humans

import {addAbortListener} from 'node:events';

// Temporarily increase the maximum number of listeners on an eventEmitter
export const incrementMaxListeners = (eventEmitter, maxListenersIncrement, signal) => {
	const maxListeners = eventEmitter.getMaxListeners();
	if (maxListeners === 0 || maxListeners === Number.POSITIVE_INFINITY) {
		return;
	}

	eventEmitter.setMaxListeners(maxListeners + maxListenersIncrement);
	addAbortListener(signal, () => {
		eventEmitter.setMaxListeners(eventEmitter.getMaxListeners() - maxListenersIncrement);
	});
};