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PhabricatorSetupEngine.php
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			<?php

			final class PhabricatorSetupEngine
			extends Phobject {

			private $issues;

			public function getIssues() {
			if ($this->issues === null) {
			throw new PhutilInvalidStateException('execute');
			}

			return $this->issues;
			}

			public function getUnresolvedIssues() {
			$issues = $this->getIssues();
			$issues = mpull($issues, null, 'getIssueKey');

			$unresolved_keys = PhabricatorSetupCheck::getUnignoredIssueKeys($issues);

			return array_select_keys($issues, $unresolved_keys);
			}

			public function execute() {
			$issues = PhabricatorSetupCheck::runNormalChecks();

			$fatal_issue = null;
			foreach ($issues as $issue) {
			if ($issue->getIsFatal()) {
			$fatal_issue = $issue;
			break;
			}
			}

			if ($fatal_issue) {
			// If we've discovered a fatal, we reset any in-flight state to push
			// web hosts out of service.

			// This can happen if Phabricator starts during a disaster and some
			// databases can not be reached. We allow Phabricator to start up in
			// this situation, since it may still be able to usefully serve requests
			// without risk to data.

			// However, if databases later become reachable and we learn that they
			// are fatally misconfigured, we want to tear the world down again
			// because data may be at risk.
			PhabricatorSetupCheck::resetSetupState();

			return PhabricatorSetupCheck::newIssueResponse($issue);
			}

			$issue_keys = PhabricatorSetupCheck::getUnignoredIssueKeys($issues);

			PhabricatorSetupCheck::setOpenSetupIssueKeys(
			$issue_keys,
			$update_database = true);

			$this->issues = $issues;

			return null;
			}

			}