A modified plugin from Peter Wilson for testing auto-updates

fast-updates.php

<?php
/**
 * Plugin Name: Schedule Update Events NOW(ish)!
 * Description: Schedules auto-updates every 60 seconds (if not already running). If they don't start, refresh. You can run the long command if impatient. But don't be impatient 😉
 */

namespace PWCC\FastUpdates;

// return;

// option deletion needs to be wp site option on MS installs.
// wp option delete auto_updater.lock; wp option delete pwccfast-wp_version_check; wp option delete pwccfast-wp_update_plugins; wp option delete pwccfast-wp_update_themes; wp cron event delete wp_version_check; wp cron event delete wp_update_plugins; wp cron event delete wp_update_themes

// npm run env:cli option delete auto_updater.lock; npm run env:cli cron event delete wp_update_plugins; npm run env:cli cron event delete wp_update_themes; npm run env:cli cron event delete wp_version_check

function now( $event ) {
	$fast_events = array( 'wp_version_check', 'wp_update_plugins', 'wp_update_themes', 'wp_maybe_auto_update' );

	if ( ! in_array( $event->hook, $fast_events, true ) ) {
		return $event;
	}

	if ( get_site_option( "pwccfast-{$event->hook}" ) ) {
		return $event;
	}

	update_site_option( "pwccfast-{$event->hook}", '1' );
	$event->timestamp = time() + 60;

	return $event;
}

add_filter( 'schedule_event', __NAMESPACE__ . '\\now', 10, 1 );

add_filter( 'automatic_updates_is_vcs_checkout', function( $checkout, $context ) {
	// return $checkout;

	if ( $context === WP_PLUGIN_DIR || $context === WP_CONTENT_DIR . '/themes' ) {
		return false;
	}

	return $checkout;
}, 10, 2 );