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PhabricatorSetupCheck.php
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Mon, Jan 27, 15:08

PhabricatorSetupCheck.php
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<?php
abstract class PhabricatorSetupCheck extends Phobject {
private $issues;
abstract protected function executeChecks();
const GROUP_OTHER = 'other';
const GROUP_MYSQL = 'mysql';
const GROUP_PHP = 'php';
const GROUP_IMPORTANT = 'important';
public function getExecutionOrder() {
if ($this->isPreflightCheck()) {
return 0;
} else {
return 1000;
}
}
/**
* Should this check execute before we load configuration?
*
* The majority of checks (particularly, those checks which examine
* configuration) should run in the normal setup phase, after configuration
* loads. However, a small set of critical checks (mostly, tests for PHP
* setup and extensions) need to run before we can load configuration.
*
* @return bool True to execute before configuration is loaded.
*/
public function isPreflightCheck() {
return false;
}
final protected function newIssue($key) {
$issue = id(new PhabricatorSetupIssue())
->setIssueKey($key);
$this->issues[$key] = $issue;
if ($this->getDefaultGroup()) {
$issue->setGroup($this->getDefaultGroup());
}
return $issue;
}
final public function getIssues() {
return $this->issues;
}
protected function addIssue(PhabricatorSetupIssue $issue) {
$this->issues[$issue->getIssueKey()] = $issue;
return $this;
}
public function getDefaultGroup() {
return null;
}
final public function runSetupChecks() {
$this->issues = array();
$this->executeChecks();
}
final public static function getOpenSetupIssueKeys() {
$cache = PhabricatorCaches::getSetupCache();
return $cache->getKey('phabricator.setup.issue-keys');
}
final public static function resetSetupState() {
$cache = PhabricatorCaches::getSetupCache();
$cache->deleteKey('phabricator.setup.issue-keys');
$server_cache = PhabricatorCaches::getServerStateCache();
$server_cache->deleteKey('phabricator.in-flight');
$use_scope = AphrontWriteGuard::isGuardActive();
if ($use_scope) {
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
} else {
AphrontWriteGuard::allowDangerousUnguardedWrites(true);
}
try {
$db_cache = new PhabricatorKeyValueDatabaseCache();
$db_cache->deleteKey('phabricator.setup.issue-keys');
} catch (Exception $ex) {
// If we hit an exception here, just ignore it. In particular, this can
// happen on initial startup before the databases are initialized.
}
if ($use_scope) {
unset($unguarded);
} else {
AphrontWriteGuard::allowDangerousUnguardedWrites(false);
}
}
final public static function setOpenSetupIssueKeys(
array $keys,
$update_database) {
$cache = PhabricatorCaches::getSetupCache();
$cache->setKey('phabricator.setup.issue-keys', $keys);
$server_cache = PhabricatorCaches::getServerStateCache();
$server_cache->setKey('phabricator.in-flight', 1);
if ($update_database) {
$db_cache = new PhabricatorKeyValueDatabaseCache();
try {
$json = phutil_json_encode($keys);
$db_cache->setKey('phabricator.setup.issue-keys', $json);
} catch (Exception $ex) {
// Ignore any write failures, since they likely just indicate that we
// have a database-related setup issue that needs to be resolved.
}
}
}
final public static function getOpenSetupIssueKeysFromDatabase() {
$db_cache = new PhabricatorKeyValueDatabaseCache();
try {
$value = $db_cache->getKey('phabricator.setup.issue-keys');
if (!strlen($value)) {
return null;
}
return phutil_json_decode($value);
} catch (Exception $ex) {
return null;
}
}
final public static function getUnignoredIssueKeys(array $all_issues) {
assert_instances_of($all_issues, 'PhabricatorSetupIssue');
$keys = array();
foreach ($all_issues as $issue) {
if (!$issue->getIsIgnored()) {
$keys[] = $issue->getIssueKey();
}
}
return $keys;
}
final public static function getConfigNeedsRepair() {
$cache = PhabricatorCaches::getSetupCache();
return $cache->getKey('phabricator.setup.needs-repair');
}
final public static function setConfigNeedsRepair($needs_repair) {
$cache = PhabricatorCaches::getSetupCache();
$cache->setKey('phabricator.setup.needs-repair', $needs_repair);
}
final public static function deleteSetupCheckCache() {
$cache = PhabricatorCaches::getSetupCache();
$cache->deleteKeys(
array(
'phabricator.setup.needs-repair',
'phabricator.setup.issue-keys',
));
}
final public static function willPreflightRequest() {
$checks = self::loadAllChecks();
foreach ($checks as $check) {
if (!$check->isPreflightCheck()) {
continue;
}
$check->runSetupChecks();
foreach ($check->getIssues() as $key => $issue) {
return self::newIssueResponse($issue);
}
}
return null;
}
public static function newIssueResponse(PhabricatorSetupIssue $issue) {
$view = id(new PhabricatorSetupIssueView())
->setIssue($issue);
return id(new PhabricatorConfigResponse())
->setView($view);
}
final public static function willProcessRequest() {
$issue_keys = self::getOpenSetupIssueKeys();
if ($issue_keys === null) {
$engine = new PhabricatorSetupEngine();
$response = $engine->execute();
if ($response) {
return $response;
}
} else if ($issue_keys) {
// If Phabricator is configured in a cluster with multiple web devices,
// we can end up with setup issues cached on every device. This can cause
// a warning banner to show on every device so that each one needs to
// be dismissed individually, which is pretty annoying. See T10876.
// To avoid this, check if the issues we found have already been cleared
// in the database. If they have, we'll just wipe out our own cache and
// move on.
$issue_keys = self::getOpenSetupIssueKeysFromDatabase();
if ($issue_keys !== null) {
self::setOpenSetupIssueKeys($issue_keys, $update_database = false);
}
}
// Try to repair configuration unless we have a clean bill of health on it.
// We need to keep doing this on every page load until all the problems
// are fixed, which is why it's separate from setup checks (which run
// once per restart).
$needs_repair = self::getConfigNeedsRepair();
if ($needs_repair !== false) {
$needs_repair = self::repairConfig();
self::setConfigNeedsRepair($needs_repair);
}
}
/**
* Test if we've survived through setup on at least one normal request
* without fataling.
*
* If we've made it through setup without hitting any fatals, we switch
* to render a more friendly error page when encountering issues like
* database connection failures. This gives users a smoother experience in
* the face of intermittent failures.
*
* @return bool True if we've made it through setup since the last restart.
*/
final public static function isInFlight() {
$cache = PhabricatorCaches::getServerStateCache();
return (bool)$cache->getKey('phabricator.in-flight');
}
final public static function loadAllChecks() {
return id(new PhutilClassMapQuery())
->setAncestorClass(__CLASS__)
->setSortMethod('getExecutionOrder')
->execute();
}
final public static function runNormalChecks() {
$checks = self::loadAllChecks();
foreach ($checks as $key => $check) {
if ($check->isPreflightCheck()) {
unset($checks[$key]);
}
}
$issues = array();
foreach ($checks as $check) {
$check->runSetupChecks();
foreach ($check->getIssues() as $key => $issue) {
if (isset($issues[$key])) {
throw new Exception(
pht(
"Two setup checks raised an issue with key '%s'!",
$key));
}
$issues[$key] = $issue;
if ($issue->getIsFatal()) {
break 2;
}
}
}
$ignore_issues = PhabricatorEnv::getEnvConfig('config.ignore-issues');
foreach ($ignore_issues as $ignorable => $derp) {
if (isset($issues[$ignorable])) {
$issues[$ignorable]->setIsIgnored(true);
}
}
return $issues;
}
final public static function repairConfig() {
$needs_repair = false;
$options = PhabricatorApplicationConfigOptions::loadAllOptions();
foreach ($options as $option) {
try {
$option->getGroup()->validateOption(
$option,
PhabricatorEnv::getEnvConfig($option->getKey()));
} catch (PhabricatorConfigValidationException $ex) {
PhabricatorEnv::repairConfig($option->getKey(), $option->getDefault());
$needs_repair = true;
}
}
return $needs_repair;
}
}

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