675 lines
23 KiB
PHP
675 lines
23 KiB
PHP
<?php
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/**
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* PEAR_DependencyDB, advanced installed packages dependency database
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*
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* PHP versions 4 and 5
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*
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* LICENSE: This source file is subject to version 3.0 of the PHP license
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* that is available through the world-wide-web at the following URI:
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* http://www.php.net/license/3_0.txt. If you did not receive a copy of
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* the PHP License and are unable to obtain it through the web, please
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* send a note to license@php.net so we can mail you a copy immediately.
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*
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* @category pear
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* @package PEAR
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* @author Tomas V. V. Cox <cox@idecnet.com>
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* @author Greg Beaver <cellog@php.net>
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* @copyright 1997-2006 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version CVS: $Id: DependencyDB.php,v 1.30.2.1 2006/05/25 22:00:05 cellog Exp $
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* @link http://pear.php.net/package/PEAR
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* @since File available since Release 1.4.0a1
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*/
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/**
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* Needed for error handling
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*/
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require_once 'PEAR.php';
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require_once 'PEAR/Config.php';
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/**
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* Track dependency relationships between installed packages
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* @category pear
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* @package PEAR
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* @author Greg Beaver <cellog@php.net>
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* @author Tomas V.V.Cox <cox@idec.net.com>
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* @copyright 1997-2006 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version Release: 1.4.11
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* @link http://pear.php.net/package/PEAR
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* @since Class available since Release 1.4.0a1
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*/
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class PEAR_DependencyDB
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{
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// {{{ properties
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/**
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* This is initialized by {@link setConfig()}
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* @var PEAR_Config
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* @access private
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*/
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var $_config;
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/**
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* This is initialized by {@link setConfig()}
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* @var PEAR_Registry
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* @access private
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*/
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var $_registry;
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/**
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* Filename of the dependency DB (usually .depdb)
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* @var string
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* @access private
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*/
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var $_depdb = false;
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/**
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* File name of the lockfile (usually .depdblock)
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* @var string
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* @access private
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*/
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var $_lockfile = false;
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/**
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* Open file resource for locking the lockfile
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* @var resource|false
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* @access private
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*/
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var $_lockFp = false;
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/**
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* API version of this class, used to validate a file on-disk
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* @var string
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* @access private
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*/
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var $_version = '1.0';
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/**
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* Cached dependency database file
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* @var array|null
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* @access private
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*/
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var $_cache;
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// }}}
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// {{{ & singleton()
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/**
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* Get a raw dependency database. Calls setConfig() and assertDepsDB()
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* @param PEAR_Config
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* @param string|false full path to the dependency database, or false to use default
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* @return PEAR_DependencyDB|PEAR_Error
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* @static
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*/
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function &singleton(&$config, $depdb = false)
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{
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if (!isset($GLOBALS['_PEAR_DEPENDENCYDB_INSTANCE']
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[$config->get('php_dir', null, 'pear.php.net')])) {
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$a = new PEAR_DependencyDB;
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$GLOBALS['_PEAR_DEPENDENCYDB_INSTANCE']
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[$config->get('php_dir', null, 'pear.php.net')] = &$a;
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$a->setConfig($config, $depdb);
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if (PEAR::isError($e = $a->assertDepsDB())) {
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return $e;
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}
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}
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return $GLOBALS['_PEAR_DEPENDENCYDB_INSTANCE']
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[$config->get('php_dir', null, 'pear.php.net')];
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}
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/**
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* Set up the registry/location of dependency DB
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* @param PEAR_Config|false
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* @param string|false full path to the dependency database, or false to use default
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*/
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function setConfig(&$config, $depdb = false)
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{
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if (!$config) {
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$this->_config = &PEAR_Config::singleton();
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} else {
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$this->_config = &$config;
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}
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$this->_registry = &$this->_config->getRegistry();
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if (!$depdb) {
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$this->_depdb = $this->_config->get('php_dir', null, 'pear.php.net') .
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DIRECTORY_SEPARATOR . '.depdb';
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} else {
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$this->_depdb = $depdb;
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}
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$this->_lockfile = dirname($this->_depdb) . DIRECTORY_SEPARATOR . '.depdblock';
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}
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// }}}
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function hasWriteAccess()
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{
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if (!@file_exists($this->_depdb)) {
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$dir = $this->_depdb;
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while ($dir && $dir != '.') {
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$dir = dirname($dir); // cd ..
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if ($dir != '.' && @file_exists($dir)) {
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if (@is_writeable($dir)) {
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return true;
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} else {
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return false;
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}
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}
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}
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return false;
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}
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return @is_writeable($this->_depdb);
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}
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// {{{ assertDepsDB()
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/**
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* Create the dependency database, if it doesn't exist. Error if the database is
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* newer than the code reading it.
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* @return void|PEAR_Error
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*/
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function assertDepsDB()
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{
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if (!is_file($this->_depdb)) {
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$this->rebuildDB();
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} else {
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$depdb = $this->_getDepDB();
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// Datatype format has been changed, rebuild the Deps DB
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if ($depdb['_version'] < $this->_version) {
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$this->rebuildDB();
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}
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if ($depdb['_version']{0} > $this->_version{0}) {
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return PEAR::raiseError('Dependency database is version ' .
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$depdb['_version'] . ', and we are version ' .
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$this->_version . ', cannot continue');
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}
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}
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}
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/**
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* Get a list of installed packages that depend on this package
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* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2|array
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* @return array|false
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*/
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function getDependentPackages(&$pkg)
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{
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$data = $this->_getDepDB();
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if (is_object($pkg)) {
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$channel = strtolower($pkg->getChannel());
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$package = strtolower($pkg->getPackage());
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} else {
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$channel = strtolower($pkg['channel']);
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$package = strtolower($pkg['package']);
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}
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if (isset($data['packages'][$channel][$package])) {
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return $data['packages'][$channel][$package];
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}
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return false;
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}
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/**
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* Get a list of the actual dependencies of installed packages that depend on
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* a package.
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* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2|array
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* @return array|false
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*/
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function getDependentPackageDependencies(&$pkg)
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{
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$data = $this->_getDepDB();
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if (is_object($pkg)) {
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$channel = strtolower($pkg->getChannel());
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$package = strtolower($pkg->getPackage());
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} else {
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$channel = strtolower($pkg['channel']);
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$package = strtolower($pkg['package']);
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}
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$depend = $this->getDependentPackages($pkg);
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if (!$depend) {
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return false;
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}
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$dependencies = array();
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foreach ($depend as $info) {
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$temp = $this->getDependencies($info);
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foreach ($temp as $dep) {
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if (strtolower($dep['dep']['channel']) == strtolower($channel) &&
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strtolower($dep['dep']['name']) == strtolower($package)) {
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$dependencies[$info['channel']][$info['package']][] = $dep;
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}
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}
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}
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return $dependencies;
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}
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/**
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* Get a list of dependencies of this installed package
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* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2|array
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* @return array|false
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*/
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function getDependencies(&$pkg)
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{
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if (is_object($pkg)) {
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$channel = strtolower($pkg->getChannel());
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$package = strtolower($pkg->getPackage());
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} else {
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$channel = strtolower($pkg['channel']);
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$package = strtolower($pkg['package']);
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}
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$data = $this->_getDepDB();
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if (isset($data['dependencies'][$channel][$package])) {
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return $data['dependencies'][$channel][$package];
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}
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return false;
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}
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/**
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* Determine whether $parent depends on $child, near or deep
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* @param array|PEAR_PackageFile_v2|PEAR_PackageFile_v2
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* @param array|PEAR_PackageFile_v2|PEAR_PackageFile_v2
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*/
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function dependsOn($parent, $child)
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{
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$c = array();
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$this->_getDepDB();
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return $this->_dependsOn($parent, $child, $c);
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}
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function _dependsOn($parent, $child, &$checked)
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{
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if (is_object($parent)) {
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$channel = strtolower($parent->getChannel());
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$package = strtolower($parent->getPackage());
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} else {
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$channel = strtolower($parent['channel']);
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$package = strtolower($parent['package']);
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}
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if (is_object($child)) {
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$depchannel = strtolower($child->getChannel());
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$deppackage = strtolower($child->getPackage());
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} else {
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$depchannel = strtolower($child['channel']);
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$deppackage = strtolower($child['package']);
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}
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if (isset($checked[$channel][$package][$depchannel][$deppackage])) {
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return false; // avoid endless recursion
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}
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$checked[$channel][$package][$depchannel][$deppackage] = true;
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if (!isset($this->_cache['dependencies'][$channel][$package])) {
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return false;
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}
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foreach ($this->_cache['dependencies'][$channel][$package] as $info) {
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if (isset($info['dep']['uri'])) {
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if (is_object($child)) {
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if ($info['dep']['uri'] == $child->getURI()) {
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return true;
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}
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} elseif (isset($child['uri'])) {
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if ($info['dep']['uri'] == $child['uri']) {
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return true;
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}
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}
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return false;
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}
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if (strtolower($info['dep']['channel']) == strtolower($depchannel) &&
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strtolower($info['dep']['name']) == strtolower($deppackage)) {
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return true;
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}
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}
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foreach ($this->_cache['dependencies'][$channel][$package] as $info) {
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if (isset($info['dep']['uri'])) {
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if ($this->_dependsOn(array(
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'uri' => $info['dep']['uri'],
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'package' => $info['dep']['name']), $child, $checked)) {
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return true;
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}
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} else {
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if ($this->_dependsOn(array(
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'channel' => $info['dep']['channel'],
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'package' => $info['dep']['name']), $child, $checked)) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Register dependencies of a package that is being installed or upgraded
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* @param PEAR_PackageFile_v2|PEAR_PackageFile_v2
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*/
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function installPackage(&$package)
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{
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$data = $this->_getDepDB();
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unset($this->_cache);
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$this->_setPackageDeps($data, $package);
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$this->_writeDepDB($data);
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}
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/**
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* Remove dependencies of a package that is being uninstalled, or upgraded.
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*
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* Upgraded packages first uninstall, then install
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* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2|array If an array, then it must have
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* indices 'channel' and 'package'
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*/
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function uninstallPackage(&$pkg)
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{
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$data = $this->_getDepDB();
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unset($this->_cache);
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if (is_object($pkg)) {
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$channel = strtolower($pkg->getChannel());
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$package = strtolower($pkg->getPackage());
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} else {
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$channel = strtolower($pkg['channel']);
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$package = strtolower($pkg['package']);
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}
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if (!isset($data['dependencies'][$channel][$package])) {
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return true;
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}
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foreach ($data['dependencies'][$channel][$package] as $dep) {
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$found = false;
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if (isset($dep['dep']['uri'])) {
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$depchannel = '__uri';
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} else {
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$depchannel = strtolower($dep['dep']['channel']);
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}
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if (isset($data['packages'][$depchannel][strtolower($dep['dep']['name'])])) {
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foreach ($data['packages'][$depchannel][strtolower($dep['dep']['name'])] as
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$i => $info) {
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if ($info['channel'] == $channel &&
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$info['package'] == $package) {
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$found = true;
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break;
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}
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}
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}
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if ($found) {
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unset($data['packages'][$depchannel][strtolower($dep['dep']['name'])][$i]);
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if (!count($data['packages'][$depchannel][strtolower($dep['dep']['name'])])) {
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unset($data['packages'][$depchannel][strtolower($dep['dep']['name'])]);
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if (!count($data['packages'][$depchannel])) {
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unset($data['packages'][$depchannel]);
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}
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} else {
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$data['packages'][$depchannel][strtolower($dep['dep']['name'])] =
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array_values(
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$data['packages'][$depchannel][strtolower($dep['dep']['name'])]);
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}
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}
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}
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unset($data['dependencies'][$channel][$package]);
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if (!count($data['dependencies'][$channel])) {
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unset($data['dependencies'][$channel]);
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}
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if (!count($data['dependencies'])) {
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unset($data['dependencies']);
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}
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if (!count($data['packages'])) {
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unset($data['packages']);
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}
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$this->_writeDepDB($data);
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}
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/**
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* Rebuild the dependency DB by reading registry entries.
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* @return true|PEAR_Error
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*/
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function rebuildDB()
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{
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$depdb = array('_version' => $this->_version);
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if (!$this->hasWriteAccess()) {
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// allow startup for read-only with older Registry
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return $depdb;
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}
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$packages = $this->_registry->listAllPackages();
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foreach ($packages as $channel => $ps) {
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foreach ($ps as $package) {
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$package = $this->_registry->getPackage($package, $channel);
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$this->_setPackageDeps($depdb, $package);
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}
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}
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$error = $this->_writeDepDB($depdb);
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if (PEAR::isError($error)) {
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return $error;
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}
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$this->_cache = $depdb;
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return true;
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}
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/**
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* Register usage of the dependency DB to prevent race conditions
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* @param int one of the LOCK_* constants
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* @return true|PEAR_Error
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* @access private
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*/
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function _lock($mode = LOCK_EX)
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{
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if (!eregi('Windows 9', php_uname())) {
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if ($mode != LOCK_UN && is_resource($this->_lockFp)) {
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// XXX does not check type of lock (LOCK_SH/LOCK_EX)
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return true;
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}
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$open_mode = 'w';
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// XXX People reported problems with LOCK_SH and 'w'
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if ($mode === LOCK_SH) {
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if (@!is_file($this->_lockfile)) {
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touch($this->_lockfile);
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}
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$open_mode = 'r';
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}
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if (!is_resource($this->_lockFp)) {
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$this->_lockFp = @fopen($this->_lockfile, $open_mode);
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}
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if (!is_resource($this->_lockFp)) {
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return PEAR::raiseError("could not create Dependency lock file" .
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(isset($php_errormsg) ? ": " . $php_errormsg : ""));
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}
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if (!(int)flock($this->_lockFp, $mode)) {
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switch ($mode) {
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case LOCK_SH: $str = 'shared'; break;
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case LOCK_EX: $str = 'exclusive'; break;
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case LOCK_UN: $str = 'unlock'; break;
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default: $str = 'unknown'; break;
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}
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return PEAR::raiseError("could not acquire $str lock ($this->_lockfile)");
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}
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}
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return true;
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}
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/**
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* Release usage of dependency DB
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* @return true|PEAR_Error
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* @access private
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*/
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function _unlock()
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{
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$ret = $this->_lock(LOCK_UN);
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if (is_resource($this->_lockFp)) {
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fclose($this->_lockFp);
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}
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$this->_lockFp = null;
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return $ret;
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}
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/**
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* Load the dependency database from disk, or return the cache
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* @return array|PEAR_Error
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*/
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function _getDepDB()
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{
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if (!$this->hasWriteAccess()) {
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return array('_version' => $this->_version);
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}
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if (isset($this->_cache)) {
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return $this->_cache;
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}
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if (!$fp = fopen($this->_depdb, 'r')) {
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$err = PEAR::raiseError("Could not open dependencies file `".$this->_depdb."'");
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return $err;
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}
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$rt = get_magic_quotes_runtime();
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set_magic_quotes_runtime(0);
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clearstatcache();
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if (function_exists('file_get_contents')) {
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fclose($fp);
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$data = unserialize(file_get_contents($this->_depdb));
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} else {
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$data = unserialize(fread($fp, filesize($this->_depdb)));
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fclose($fp);
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}
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set_magic_quotes_runtime($rt);
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$this->_cache = $data;
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return $data;
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}
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/**
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* Write out the dependency database to disk
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* @param array the database
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* @return true|PEAR_Error
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* @access private
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*/
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function _writeDepDB(&$deps)
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{
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if (PEAR::isError($e = $this->_lock(LOCK_EX))) {
|
|
return $e;
|
|
}
|
|
if (!$fp = fopen($this->_depdb, 'wb')) {
|
|
$this->_unlock();
|
|
return PEAR::raiseError("Could not open dependencies file `".$this->_depdb."' for writing");
|
|
}
|
|
$rt = get_magic_quotes_runtime();
|
|
set_magic_quotes_runtime(0);
|
|
fwrite($fp, serialize($deps));
|
|
set_magic_quotes_runtime($rt);
|
|
fclose($fp);
|
|
$this->_unlock();
|
|
$this->_cache = $deps;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Register all dependencies from a package in the dependencies database, in essence
|
|
* "installing" the package's dependency information
|
|
* @param array the database
|
|
* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2
|
|
* @access private
|
|
*/
|
|
function _setPackageDeps(&$data, &$pkg)
|
|
{
|
|
$pkg->setConfig($this->_config);
|
|
if ($pkg->getPackagexmlVersion() == '1.0') {
|
|
$gen = &$pkg->getDefaultGenerator();
|
|
$deps = $gen->dependenciesToV2();
|
|
} else {
|
|
$deps = $pkg->getDeps(true);
|
|
}
|
|
if (!$deps) {
|
|
return;
|
|
}
|
|
$data['dependencies'][strtolower($pkg->getChannel())][strtolower($pkg->getPackage())]
|
|
= array();
|
|
if (isset($deps['required']['package'])) {
|
|
if (!isset($deps['required']['package'][0])) {
|
|
$deps['required']['package'] = array($deps['required']['package']);
|
|
}
|
|
foreach ($deps['required']['package'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'required');
|
|
}
|
|
}
|
|
if (isset($deps['optional']['package'])) {
|
|
if (!isset($deps['optional']['package'][0])) {
|
|
$deps['optional']['package'] = array($deps['optional']['package']);
|
|
}
|
|
foreach ($deps['optional']['package'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'optional');
|
|
}
|
|
}
|
|
if (isset($deps['required']['subpackage'])) {
|
|
if (!isset($deps['required']['subpackage'][0])) {
|
|
$deps['required']['subpackage'] = array($deps['required']['subpackage']);
|
|
}
|
|
foreach ($deps['required']['subpackage'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'required');
|
|
}
|
|
}
|
|
if (isset($deps['optional']['subpackage'])) {
|
|
if (!isset($deps['optional']['subpackage'][0])) {
|
|
$deps['optional']['subpackage'] = array($deps['optional']['subpackage']);
|
|
}
|
|
foreach ($deps['optional']['subpackage'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'optional');
|
|
}
|
|
}
|
|
if (isset($deps['group'])) {
|
|
if (!isset($deps['group'][0])) {
|
|
$deps['group'] = array($deps['group']);
|
|
}
|
|
foreach ($deps['group'] as $group) {
|
|
if (isset($group['package'])) {
|
|
if (!isset($group['package'][0])) {
|
|
$group['package'] = array($group['package']);
|
|
}
|
|
foreach ($group['package'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'optional',
|
|
$group['attribs']['name']);
|
|
}
|
|
}
|
|
if (isset($group['subpackage'])) {
|
|
if (!isset($group['subpackage'][0])) {
|
|
$group['subpackage'] = array($group['subpackage']);
|
|
}
|
|
foreach ($group['subpackage'] as $dep) {
|
|
$this->_registerDep($data, $pkg, $dep, 'optional',
|
|
$group['attribs']['name']);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ($data['dependencies'][strtolower($pkg->getChannel())]
|
|
[strtolower($pkg->getPackage())] == array()) {
|
|
unset($data['dependencies'][strtolower($pkg->getChannel())]
|
|
[strtolower($pkg->getPackage())]);
|
|
if (!count($data['dependencies'][strtolower($pkg->getChannel())])) {
|
|
unset($data['dependencies'][strtolower($pkg->getChannel())]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array the database
|
|
* @param PEAR_PackageFile_v1|PEAR_PackageFile_v2
|
|
* @param array the specific dependency
|
|
* @param required|optional whether this is a required or an optional dep
|
|
* @param string|false dependency group this dependency is from, or false for ordinary dep
|
|
*/
|
|
function _registerDep(&$data, &$pkg, $dep, $type, $group = false)
|
|
{
|
|
$info = array(
|
|
'dep' => $dep,
|
|
'type' => $type,
|
|
'group' => $group);
|
|
|
|
if (isset($dep['channel'])) {
|
|
$depchannel = $dep['channel'];
|
|
} else {
|
|
$depchannel = '__uri';
|
|
}
|
|
$data['dependencies'][strtolower($pkg->getChannel())][strtolower($pkg->getPackage())][]
|
|
= $info;
|
|
if (isset($data['packages'][strtolower($depchannel)][strtolower($dep['name'])])) {
|
|
$found = false;
|
|
foreach ($data['packages'][strtolower($depchannel)][strtolower($dep['name'])]
|
|
as $i => $p) {
|
|
if ($p['channel'] == strtolower($pkg->getChannel()) &&
|
|
$p['package'] == strtolower($pkg->getPackage())) {
|
|
$found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!$found) {
|
|
$data['packages'][strtolower($depchannel)][strtolower($dep['name'])][]
|
|
= array('channel' => strtolower($pkg->getChannel()),
|
|
'package' => strtolower($pkg->getPackage()));
|
|
}
|
|
} else {
|
|
$data['packages'][strtolower($depchannel)][strtolower($dep['name'])][]
|
|
= array('channel' => strtolower($pkg->getChannel()),
|
|
'package' => strtolower($pkg->getPackage()));
|
|
}
|
|
}
|
|
}
|
|
?>
|