check-version.php

<?php

/**
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines https://www.simplemachines.org
 * @copyright 2024 Simple Machines and individual contributors
 * @license https://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 3.0 Alpha 1
 */

try {
	$smf_version = '';
	$versions = [];
	$years = [];
	foreach (['./index.php', './SSI.php', './cron.php', './proxy.php'] as $path)
	{
		if (in_array($path, ['./SSI.php', './cron.php', './proxy.php']) && version_compare($smf_version, '3.0 Alpha 1', '>='))
			continue;

		$contents = file_get_contents($path, false, null, 0, 1500);

		if (!preg_match('/define\(\'SMF_VERSION\', \'([^\']+)\'\);/i', $contents, $versionResults)) {
			throw new Exception('Error: Could not locate SMF_VERSION in ' . $path);
		}
		$versions[$versionResults[1]][] = $path;

		if (empty($smf_version)) {
			$smf_version = $versionResults[1];
		}

		if (!preg_match('/define\(\'SMF_SOFTWARE_YEAR\', \'(\d{4})\'\);/i', $contents, $yearResults)) {
			throw new Exception('Error: Could not locate SMF_SOFTWARE_YEAR in ' . $path);
		}
		$years[$yearResults[1]][] = $path;
	}

	if (count($versions) != 1) {
		$errmsg = 'Error: SMF_VERSION differs between files.';
		foreach ($versions as $version => $paths) {
			$errmsg .= ' "' . $version . '" in ' . implode(', ', $paths) . '.';
		}
		throw new Exception($errmsg);
	}

	if (count($years) != 1) {
		$errmsg = 'Error: SMF_SOFTWARE_YEAR differs between files.';
		foreach ($years as $year => $paths) {
			$errmsg .= ' "' . $year . '" in ' . implode(', ', $paths) . '.';
		}
		throw new Exception($errmsg);
	}

	if (!preg_match('~^((\d+)\.(\d+)[. ]?((?:(?<= )(?>RC|Beta |Alpha ))?\d+)?)$~', key($versions))) {
		throw new Exception('Error: SMF_VERSION string is invalid: "' . key($versions) . '"');
	}

	if (($headyear = (int) substr(shell_exec('git show -s --format=%ci HEAD'), 0, 4)) > (int) key($years)) {
		throw new Exception('Error: SMF_SOFTWARE_YEAR is ' . (int) key($years) . ', should be ' . $headyear . '.');
	}
}
catch (Exception $e) {
	fwrite(STDERR, $e->getMessage());
	exit(1);
}