class.ilSubversionInformation.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/Administration/interfaces/interface.ilVersionControlInformation.php';

class ilSubversionInformation implements ilVersionControlInformation
{
    const SVN_GET_17_FILE = '.svn/wc.db';

    const SVN_LT_17_FILE = '.svn/entries';
    
    private static $revision_information = null;

    private static function isSvnRevision($revision)
    {
        return (bool) preg_match('/^\d+(:\d+)*[MSP]*$/', $revision);
    }

    private static function isProbablySubversion17()
    {
        return file_exists(self::SVN_GET_17_FILE) && is_file(self::SVN_GET_17_FILE) && is_readable(self::SVN_GET_17_FILE);
    }

    private static function isProbablySubversionLower17()
    {
        return file_exists(self::SVN_LT_17_FILE) && is_file(self::SVN_LT_17_FILE) && is_readable(self::SVN_LT_17_FILE);
    }

    private static function detect()
    {
        global $DIC;

        $lng = $DIC->language();

        if (null !== self::$revision_information) {
            return self::$revision_information;
        }

        $info = array();

        if (self::isProbablySubversion17()) {
            if (extension_loaded('PDO') && extension_loaded('pdo_sqlite')) {
                try {
                    $wcdb = new PDO('sqlite:' . self::SVN_GET_17_FILE);

                    $result = $wcdb->query('SELECT MAX("revision") current_rev FROM "NODES"');
                    if ($result) {
                        foreach ($result as $row) {
                            $revision = $row['current_rev'];
                            if (self::isSvnRevision($revision)) {
                                $info[] = sprintf($lng->txt('svn_revision_current'), $revision);
                            }
                            break;
                        }
                    }

                    $result = $wcdb->query('SELECT "changed_revision" last_changed_revision FROM "NODES" ORDER BY changed_revision DESC LIMIT 1');
                    if ($result) {
                        foreach ($result as $row) {
                            $revision = $row['last_changed_revision'];
                            if (self::isSvnRevision($revision)) {
                                $info[] = sprintf($lng->txt('svn_revision_last_change'), $revision);
                            }
                            break;
                        }
                    }

                    $result = $wcdb->query('SELECT * FROM REPOSITORY ');
                    if ($result) {
                        foreach ($result as $row) {
                            $info[] = sprintf($lng->txt('svn_root'), $row['root']);
                        }
                    }

                    $result = $wcdb->query('SELECT * FROM "NODES" WHERE local_relpath LIKE "%inc.ilias_version.php"');
                    if ($result) {
                        foreach ($result as $row) {
                            $path = dirname(dirname($row['repos_path']));
                            if ($path) {
                                $info[] = sprintf($lng->txt('svn_path'), $path);
                            }
                        }
                    }
                } catch (Exception $e) {
                }
            }
        } else {
            if (function_exists('shell_exec') && is_callable('shell_exec')) {
                $revision = trim(shell_exec('svnversion ' . realpath(getcwd())));
                if (self::isSvnRevision($revision)) {
                    $info[] = sprintf($lng->txt('svn_revision_current'), $revision);
                }
            }
            if (self::isProbablySubversionLower17()) {
                $svnfile = file(self::SVN_LT_17_FILE);
                $revision = $svnfile[3];
                if (self::isSvnRevision($revision)) {
                    $info[] = sprintf($lng->txt('svn_revision_last_change'), $revision);
                }
            }
        }

        self::$revision_information = $info;
    }

    public function getInformationAsHtml()
    {
        self::detect();

        return implode("<br />", self::$revision_information);
    }
}