/blog/www/system/library/PEAR/PEAR/Installer/Role/Cfg.php

<?php

/**

 * PEAR_Installer_Role_Cfg

 *

 * PHP versions 4 and 5

 *

 * LICENSE: This source file is subject to version 3.0 of the PHP license

 * that is available through the world-wide-web at the following URI:

 * http://www.php.net/license/3_0.txt.  If you did not receive a copy of

 * the PHP License and are unable to obtain it through the web, please

 * send a note to license@php.net so we can mail you a copy immediately.

 *

 * @category   pear

 * @package    PEAR

 * @author     Greg Beaver <cellog@php.net>

 * @copyright  2007-2008 The PHP Group

 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0

 * @version    CVS: $Id: Cfg.php 11 2008-09-16 18:31:09Z root $

 * @link       http://pear.php.net/package/PEAR

 * @since      File available since Release 1.7.0

 */



/**

 * @category   pear

 * @package    PEAR

 * @author     Greg Beaver <cellog@php.net>

 * @copyright  2007-2008 The PHP Group

 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0

 * @version    Release: 1.7.2

 * @link       http://pear.php.net/package/PEAR

 * @since      Class available since Release 1.7.0

 */

class PEAR_Installer_Role_Cfg extends PEAR_Installer_Role_Common

{

    /**

     * @var PEAR_Installer

     */

    var $installer;

    /**

     * the md5 of the original file

     *

     * @var unknown_type

     */

    var $md5 = null;

    /**

     * Do any unusual setup here

     * @param PEAR_Installer

     * @param PEAR_PackageFile_v2

     * @param array file attributes

     * @param string file name

     */

    function setup(&$installer, $pkg, $atts, $file)

    {

        $this->installer = &$installer;

        $reg = &$this->installer->config->getRegistry();

        $package = $reg->getPackage($pkg->getPackage(), $pkg->getChannel());

        if ($package) {

            $filelist = $package->getFilelist();

            if (isset($filelist[$file]) && isset($filelist[$file]['md5sum'])) {

                $this->md5 = $filelist[$file]['md5sum'];

            }

        }

    }



    function processInstallation($pkg, $atts, $file, $tmp_path, $layer = null)

    {

        $test = parent::processInstallation($pkg, $atts, $file, $tmp_path, $layer);

        if (@file_exists($test[2]) && @file_exists($test[3])) {

            $md5 = md5_file($test[2]);

            // configuration has already been installed, check for mods

            if ($md5 !== $this->md5 && $md5 !== md5_file($test[3])) {

                // configuration has been modified, so save our version as

                // configfile-version

                $old = $test[2];

                $test[2] .= '.new-' . $pkg->getVersion();

                // backup original and re-install it

                PEAR::pushErrorHandling(PEAR_ERROR_RETURN);

                $tmpcfg = $this->config->get('temp_dir');

                $newloc = System::mkdir(array('-p', $tmpcfg));

                if (!$newloc) {

                    // try temp_dir

                    $newloc = System::mktemp(array('-d'));

                    if (!$newloc || PEAR::isError($newloc)) {

                        PEAR::popErrorHandling();

                        return PEAR::raiseError('Could not save existing configuration file '.

                            $old . ', unable to install.  Please set temp_dir ' .

                            'configuration variable to a writeable location and try again');

                    }

                } else {

                    $newloc = $tmpcfg;

                }

                $temp_file = $newloc . DIRECTORY_SEPARATOR . uniqid('savefile');

                if (!@copy($old, $temp_file)) {

                    PEAR::popErrorHandling();

                    return PEAR::raiseError('Could not save existing configuration file '.

                        $old . ', unable to install.  Please set temp_dir ' .

                        'configuration variable to a writeable location and try again');

                }

                PEAR::popErrorHandling();

                $this->installer->log(0, "WARNING: configuration file $old is being installed as $test[2], you should manually merge in changes to the existing configuration file");

                $this->installer->addFileOperation('rename', array($temp_file, $old, false));

                $this->installer->addFileOperation('delete', array($temp_file));

            }

        }

        return $test;

    }

}

?>