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 $lng;

                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);
        }
}