$ rm -fr mod/forum
$ php test.php || echo "Ouch, something went wrong!"
ERROR: Plugin mod has forum as standard, missing in codebase.
ERROR: Plugin block has search_books, search_glossaries in codebase, missing as standard.
ERROR: Plugin filter has geshi, moodledocs, moodlelinks in codebase, missing as standard.
ERROR: Plugin profilefield has social in codebase, missing as standard.
ERROR: Plugin report has rawrecordscount in codebase, missing as standard.
ERROR: Plugin local has ci, codechecker, moodlecheck in codebase, missing as standard.
Ouch, something went wrong!


==== ==== ==== ==== ====
<?php

define('IGNORE_COMPONENT_CACHE', 1);
define('MOODLE_INTERNAL', 1);

// TODO: The following lines can be replaced by load_core_component_from_moodle()
// from local_ci once integrated within the code there.
$moodledirroot = '/Users/stronk7/git_moodle/moodle';
unset($CFG);
global $CFG;
$CFG = new stdClass();
$CFG->dirroot = $moodledirroot;
$CFG->libdir = $CFG->dirroot . '/lib';
$CFG->admin = 'admin';

// Let's inject our fake cache.
class cache {
    static function make() {
        return new self();
    }
    function get() { }
    function set() { }
}

require('lib/classes/plugin_manager.php');
require('lib/classes/component.php');

$pm = core_plugin_manager::instance();
$pts = $pm->get_plugin_types();
$stds = [];
$avas = [];
$error = false;
foreach ($pts as $type => $notused) {
    $stds[$type] = $pm::standard_plugins_list($type) ?: [];
    $avas[$type] = array_keys($pm->get_present_plugins($type) ?? []);
    if ($diff = array_diff($stds[$type], $avas[$type])) {
        $error = true;
        echo "ERROR: Plugin {$type} has " . implode(', ', $diff) . " as standard, missing in codebase.\n";
    }
    if ($diff = array_diff($avas[$type], $stds[$type])) {
        $error = true;
        echo "ERROR: Plugin {$type} has " . implode(', ', $diff) . " in codebase, missing as standard.\n";
    }
}

if (!$error) {
    echo "OK: Standard plugins and codebase plugins match.\n";
}
exit((int)$error);