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Merge branch 'MDL-73098' of https://github.com/stronk7/moodle

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This commit is contained in:
Shamim Rezaie 2021-11-19 15:19:15 +11:00
commit a46aa000b0
2 changed files with 30 additions and 1 deletions

6
lib/setup.php

@ -666,6 +666,12 @@ $bootstrapcachefile = $CFG->localcachedir . '/bootstrap.php';
if (is_readable($bootstrapcachefile)) {
try {
require_once($bootstrapcachefile);
// Verify the file is not stale.
if (!isset($CFG->bootstraphash) || $CFG->bootstraphash !== hash_local_config_cache()) {
// Something has changed, the bootstrap.php file is stale.
unset($CFG->siteidentifier);
@unlink($bootstrapcachefile);
}
} catch (Throwable $e) {
// If it is corrupted then attempt to delete it and it will be rebuilt.
@unlink($bootstrapcachefile);

25
lib/setuplib.php

@ -809,7 +809,11 @@ function initialise_local_config_cache() {
$contents = "<?php
// ********** This file is generated DO NOT EDIT **********
\$CFG->siteidentifier = '" . addslashes($CFG->siteidentifier) . "';
define('SYSCONTEXTID', ".SYSCONTEXTID.");
\$CFG->bootstraphash = '" . hash_local_config_cache() . "';
// Only if the file is not stale and has not been defined.
if (\$CFG->bootstraphash === hash_local_config_cache() && !defined('SYSCONTEXTID')) {
define('SYSCONTEXTID', ".SYSCONTEXTID.");
}
";
$temp = $bootstrapcachefile . '.tmp' . uniqid();
@ -819,6 +823,25 @@ define('SYSCONTEXTID', ".SYSCONTEXTID.");
}
}
/**
* Calculate a proper hash to be able to invalidate stale cached configs.
*
* Only to be used to verify bootstrap.php status.
*
* @return string md5 hash of all the sensible bits deciding if cached config is stale or no.
*/
function hash_local_config_cache() {
global $CFG;
// This is pretty much {@see moodle_database::get_settings_hash()} that is used
// as identifier for the database meta information MUC cache. Should be enough to
// react against any of the normal changes (new prefix, change of DB type) while
// *incorrectly* keeping the old dataroot directory unmodified with stale data.
// This may need more stuff to be considered if it's discovered that there are
// more variables making the file stale.
return md5($CFG->dbtype . $CFG->dbhost . $CFG->dbuser . $CFG->dbname . $CFG->prefix);
}
/**
* Initialises $FULLME and friends. Private function. Should only be called from
* setup.php.