* @author Greg Beaver
* @copyright 1997-2009 The Authors
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @link http://pear.php.net/package/PEAR
* @since File available since Release 0.1
*/

/**
* Required for error handling
*/
require_once ‘PEAR.php’;
require_once ‘PEAR/Registry.php’;
require_once ‘PEAR/Installer/Role.php’;
require_once ‘System.php’;

/**
* Last created PEAR_Config instance.
* @var object
*/
$GLOBALS[‘_PEAR_Config_instance’] = null;
if (!defined(‘PEAR_INSTALL_DIR’) || !PEAR_INSTALL_DIR) {
$PEAR_INSTALL_DIR = PHP_LIBDIR . DIRECTORY_SEPARATOR . ‘pear’;
} else {
$PEAR_INSTALL_DIR = PEAR_INSTALL_DIR;
}

// Below we define constants with default values for all configuration
// parameters except username/password. All of them can have their
// defaults set through environment variables. The reason we use the
// PHP_ prefix is for some security, PHP protects environment
// variables starting with PHP_*.

// default channel and preferred mirror is based on whether we are invoked through
// the “pear” or the “pecl” command
if (!defined(‘PEAR_RUNTYPE’)) {
define(‘PEAR_RUNTYPE’, ‘pear’);
}

if (PEAR_RUNTYPE == ‘pear’) {
define(‘PEAR_CONFIG_DEFAULT_CHANNEL’, ‘pear.php.net’);
} else {
define(‘PEAR_CONFIG_DEFAULT_CHANNEL’, ‘pecl.php.net’);
}

if (getenv(‘PHP_PEAR_SYSCONF_DIR’)) {
define(‘PEAR_CONFIG_SYSCONFDIR’, getenv(‘PHP_PEAR_SYSCONF_DIR’));
} elseif (getenv(‘SystemRoot’)) {
define(‘PEAR_CONFIG_SYSCONFDIR’, getenv(‘SystemRoot’));
} else {
define(‘PEAR_CONFIG_SYSCONFDIR’, PHP_SYSCONFDIR . ‘/pear’);
}

// Default for master_server
if (getenv(‘PHP_PEAR_MASTER_SERVER’)) {
define(‘PEAR_CONFIG_DEFAULT_MASTER_SERVER’, getenv(‘PHP_PEAR_MASTER_SERVER’));
} else {
define(‘PEAR_CONFIG_DEFAULT_MASTER_SERVER’, ‘pear.php.net’);
}

// Default for http_proxy
if (getenv(‘PHP_PEAR_HTTP_PROXY’)) {
define(‘PEAR_CONFIG_DEFAULT_HTTP_PROXY’, getenv(‘PHP_PEAR_HTTP_PROXY’));
} elseif (getenv(‘http_proxy’)) {
define(‘PEAR_CONFIG_DEFAULT_HTTP_PROXY’, getenv(‘http_proxy’));
} else {
define(‘PEAR_CONFIG_DEFAULT_HTTP_PROXY’, ”);
}

// Default for php_dir
if (getenv(‘PHP_PEAR_INSTALL_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_PHP_DIR’, getenv(‘PHP_PEAR_INSTALL_DIR’));
} else {
if (@file_exists($PEAR_INSTALL_DIR) && is_dir($PEAR_INSTALL_DIR)) {
define(‘PEAR_CONFIG_DEFAULT_PHP_DIR’, $PEAR_INSTALL_DIR);
} else {
define(‘PEAR_CONFIG_DEFAULT_PHP_DIR’, $PEAR_INSTALL_DIR);
}
}

// Default for metadata_dir
if (getenv(‘PHP_PEAR_METADATA_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_METADATA_DIR’, getenv(‘PHP_PEAR_METADATA_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_METADATA_DIR’, ”);
}

// Default for ext_dir
if (getenv(‘PHP_PEAR_EXTENSION_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_EXT_DIR’, getenv(‘PHP_PEAR_EXTENSION_DIR’));
} else {
if (ini_get(‘extension_dir’)) {
define(‘PEAR_CONFIG_DEFAULT_EXT_DIR’, ini_get(‘extension_dir’));
} elseif (defined(‘PEAR_EXTENSION_DIR’) &&
file_exists(PEAR_EXTENSION_DIR) && is_dir(PEAR_EXTENSION_DIR)) {
define(‘PEAR_CONFIG_DEFAULT_EXT_DIR’, PEAR_EXTENSION_DIR);
} elseif (defined(‘PHP_EXTENSION_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_EXT_DIR’, PHP_EXTENSION_DIR);
} else {
define(‘PEAR_CONFIG_DEFAULT_EXT_DIR’, ‘.’);
}
}

// Default for doc_dir
if (getenv(‘PHP_PEAR_DOC_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_DOC_DIR’, getenv(‘PHP_PEAR_DOC_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_DOC_DIR’,
$PEAR_INSTALL_DIR.DIRECTORY_SEPARATOR.’docs’);
}

// Default for bin_dir
if (getenv(‘PHP_PEAR_BIN_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_BIN_DIR’, getenv(‘PHP_PEAR_BIN_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_BIN_DIR’, PHP_BINDIR);
}

// Default for data_dir
if (getenv(‘PHP_PEAR_DATA_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_DATA_DIR’, getenv(‘PHP_PEAR_DATA_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_DATA_DIR’,
$PEAR_INSTALL_DIR.DIRECTORY_SEPARATOR.’data’);
}

// Default for cfg_dir
if (getenv(‘PHP_PEAR_CFG_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_CFG_DIR’, getenv(‘PHP_PEAR_CFG_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_CFG_DIR’,
$PEAR_INSTALL_DIR.DIRECTORY_SEPARATOR.’cfg’);
}

// Default for www_dir
if (getenv(‘PHP_PEAR_WWW_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_WWW_DIR’, getenv(‘PHP_PEAR_WWW_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_WWW_DIR’,
$PEAR_INSTALL_DIR.DIRECTORY_SEPARATOR.’www’);
}

// Default for man_dir
if (getenv(‘PHP_PEAR_MAN_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_MAN_DIR’, getenv(‘PHP_PEAR_MAN_DIR’));
} else {
if (defined(‘PHP_MANDIR’)) { // Added in PHP5.3.7
define(‘PEAR_CONFIG_DEFAULT_MAN_DIR’, PHP_MANDIR);
} else {
define(‘PEAR_CONFIG_DEFAULT_MAN_DIR’, PHP_PREFIX . DIRECTORY_SEPARATOR .
‘local’ . DIRECTORY_SEPARATOR .’man’);
}
}

// Default for test_dir
if (getenv(‘PHP_PEAR_TEST_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_TEST_DIR’, getenv(‘PHP_PEAR_TEST_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_TEST_DIR’,
$PEAR_INSTALL_DIR.DIRECTORY_SEPARATOR.’tests’);
}

// Default for temp_dir
if (getenv(‘PHP_PEAR_TEMP_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_TEMP_DIR’, getenv(‘PHP_PEAR_TEMP_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_TEMP_DIR’,
System::tmpdir() . DIRECTORY_SEPARATOR . ‘pear’ .
DIRECTORY_SEPARATOR . ‘temp’);
}

// Default for cache_dir
if (getenv(‘PHP_PEAR_CACHE_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_CACHE_DIR’, getenv(‘PHP_PEAR_CACHE_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_CACHE_DIR’,
System::tmpdir() . DIRECTORY_SEPARATOR . ‘pear’ .
DIRECTORY_SEPARATOR . ‘cache’);
}

// Default for download_dir
if (getenv(‘PHP_PEAR_DOWNLOAD_DIR’)) {
define(‘PEAR_CONFIG_DEFAULT_DOWNLOAD_DIR’, getenv(‘PHP_PEAR_DOWNLOAD_DIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_DOWNLOAD_DIR’,
System::tmpdir() . DIRECTORY_SEPARATOR . ‘pear’ .
DIRECTORY_SEPARATOR . ‘download’);
}

// Default for php_bin
if (getenv(‘PHP_PEAR_PHP_BIN’)) {
define(‘PEAR_CONFIG_DEFAULT_PHP_BIN’, getenv(‘PHP_PEAR_PHP_BIN’));
} else {
define(‘PEAR_CONFIG_DEFAULT_PHP_BIN’, PEAR_CONFIG_DEFAULT_BIN_DIR.
DIRECTORY_SEPARATOR.’php’.(OS_WINDOWS ? ‘.exe’ : ”));
}

// Default for verbose
if (getenv(‘PHP_PEAR_VERBOSE’)) {
define(‘PEAR_CONFIG_DEFAULT_VERBOSE’, getenv(‘PHP_PEAR_VERBOSE’));
} else {
define(‘PEAR_CONFIG_DEFAULT_VERBOSE’, 1);
}

// Default for preferred_state
if (getenv(‘PHP_PEAR_PREFERRED_STATE’)) {
define(‘PEAR_CONFIG_DEFAULT_PREFERRED_STATE’, getenv(‘PHP_PEAR_PREFERRED_STATE’));
} else {
define(‘PEAR_CONFIG_DEFAULT_PREFERRED_STATE’, ‘stable’);
}

// Default for umask
if (getenv(‘PHP_PEAR_UMASK’)) {
define(‘PEAR_CONFIG_DEFAULT_UMASK’, getenv(‘PHP_PEAR_UMASK’));
} else {
define(‘PEAR_CONFIG_DEFAULT_UMASK’, decoct(umask()));
}

// Default for cache_ttl
if (getenv(‘PHP_PEAR_CACHE_TTL’)) {
define(‘PEAR_CONFIG_DEFAULT_CACHE_TTL’, getenv(‘PHP_PEAR_CACHE_TTL’));
} else {
define(‘PEAR_CONFIG_DEFAULT_CACHE_TTL’, 3600);
}

// Default for sig_type
if (getenv(‘PHP_PEAR_SIG_TYPE’)) {
define(‘PEAR_CONFIG_DEFAULT_SIG_TYPE’, getenv(‘PHP_PEAR_SIG_TYPE’));
} else {
define(‘PEAR_CONFIG_DEFAULT_SIG_TYPE’, ‘gpg’);
}

// Default for sig_bin
if (getenv(‘PHP_PEAR_SIG_BIN’)) {
define(‘PEAR_CONFIG_DEFAULT_SIG_BIN’, getenv(‘PHP_PEAR_SIG_BIN’));
} else {
define(‘PEAR_CONFIG_DEFAULT_SIG_BIN’,
System::which(
‘gpg’, OS_WINDOWS ? ‘c:\gnupg\gpg.exe’ : ‘/usr/local/bin/gpg’));
}

// Default for sig_keydir
if (getenv(‘PHP_PEAR_SIG_KEYDIR’)) {
define(‘PEAR_CONFIG_DEFAULT_SIG_KEYDIR’, getenv(‘PHP_PEAR_SIG_KEYDIR’));
} else {
define(‘PEAR_CONFIG_DEFAULT_SIG_KEYDIR’,
PEAR_CONFIG_SYSCONFDIR . DIRECTORY_SEPARATOR . ‘pearkeys’);
}

/**
* This is a class for storing configuration data, keeping track of
* which are system-defined, user-defined or defaulted.
* @category pear
* @package PEAR
* @author Stig Bakken
* @author Greg Beaver
* @copyright 1997-2009 The Authors
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version Release: 1.10.12
* @link http://pear.php.net/package/PEAR
* @since Class available since Release 0.1
*/
class PEAR_Config extends PEAR
{
/**
* Array of config files used.
*
* @var array layer => config file
*/
var $files = array(
‘system’ => ”,
‘user’ => ”,
);

var $layers = array();

/**
* Configuration data, two-dimensional array where the first
* dimension is the config layer (‘user’, ‘system’ and ‘default’),
* and the second dimension is keyname => value.
*
* The order in the first dimension is important! Earlier
* layers will shadow later ones when a config value is
* requested (if a ‘user’ value exists, it will be returned first,
* then ‘system’ and finally ‘default’).
*
* @var array layer => array(keyname => value, …)
*/
var $configuration = array(
‘user’ => array(),
‘system’ => array(),
‘default’ => array(),
);

/**
* Configuration values that can be set for a channel
*
* All other configuration values can only have a global value
* @var array
* @access private
*/
var $_channelConfigInfo = array(
‘php_dir’, ‘ext_dir’, ‘doc_dir’, ‘bin_dir’, ‘data_dir’, ‘cfg_dir’,
‘test_dir’, ‘www_dir’, ‘php_bin’, ‘php_prefix’, ‘php_suffix’, ‘username’,
‘password’, ‘verbose’, ‘preferred_state’, ‘umask’, ‘preferred_mirror’, ‘php_ini’
);

/**
* Channels that can be accessed
* @see setChannels()
* @var array
* @access private
*/
var $_channels = array(‘pear.php.net’, ‘pecl.php.net’, ‘__uri’);

/**
* This variable is used to control the directory values returned
* @see setInstallRoot();
* @var string|false
* @access private
*/
var $_installRoot = false;

/**
* If requested, this will always refer to the registry
* contained in php_dir
* @var PEAR_Registry
*/
var $_registry = array();

/**
* @var array
* @access private
*/
var $_regInitialized = array();

/**
* @var bool
* @access private
*/
var $_noRegistry = false;

/**
* amount of errors found while parsing config
* @var integer
* @access private
*/
var $_errorsFound = 0;
var $_lastError = null;

/**
* Information about the configuration data. Stores the type,
* default value and a documentation string for each configuration
* value.
*
* @var array layer => array(infotype => value, …)
*/
var $configuration_info = array(
// Channels/Internet Access
‘default_channel’ => array(
‘type’ => ‘string’,
‘default’ => PEAR_CONFIG_DEFAULT_CHANNEL,
‘doc’ => ‘the default channel to use for all non explicit commands’,
‘prompt’ => ‘Default Channel’,
‘group’ => ‘Internet Access’,
),
‘preferred_mirror’ => array(
‘type’ => ‘string’,
‘default’ => PEAR_CONFIG_DEFAULT_CHANNEL,
‘doc’ => ‘the default server or mirror to use for channel actions’,
‘prompt’ => ‘Default Channel Mirror’,
‘group’ => ‘Internet Access’,
),
‘remote_config’ => array(
‘type’ => ‘password’,
‘default’ => ”,
‘doc’ => ‘ftp url of remote configuration file to use for synchronized install’,
‘prompt’ => ‘Remote Configuration File’,
‘group’ => ‘Internet Access’,
),
‘auto_discover’ => array(
‘type’ => ‘integer’,
‘default’ => 0,
‘doc’ => ‘whether to automatically discover new channels’,
‘prompt’ => ‘Auto-discover new Channels’,
‘group’ => ‘Internet Access’,
),
// Internet Access
‘master_server’ => array(
‘type’ => ‘string’,
‘default’ => ‘pear.php.net’,
‘doc’ => ‘name of the main PEAR server [NOT USED IN THIS VERSION]’,
‘prompt’ => ‘PEAR server [DEPRECATED]’,
‘group’ => ‘Internet Access’,
),
‘http_proxy’ => array(
‘type’ => ‘string’,
‘default’ => PEAR_CONFIG_DEFAULT_HTTP_PROXY,
‘doc’ => ‘HTTP proxy (host:port) to use when downloading packages’,
‘prompt’ => ‘HTTP Proxy Server Address’,
‘group’ => ‘Internet Access’,
),
// File Locations
‘php_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_PHP_DIR,
‘doc’ => ‘directory where .php files are installed’,
‘prompt’ => ‘PEAR directory’,
‘group’ => ‘File Locations’,
),
‘ext_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_EXT_DIR,
‘doc’ => ‘directory where loadable extensions are installed’,
‘prompt’ => ‘PHP extension directory’,
‘group’ => ‘File Locations’,
),
‘doc_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_DOC_DIR,
‘doc’ => ‘directory where documentation is installed’,
‘prompt’ => ‘PEAR documentation directory’,
‘group’ => ‘File Locations’,
),
‘bin_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_BIN_DIR,
‘doc’ => ‘directory where executables are installed’,
‘prompt’ => ‘PEAR executables directory’,
‘group’ => ‘File Locations’,
),
‘data_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_DATA_DIR,
‘doc’ => ‘directory where data files are installed’,
‘prompt’ => ‘PEAR data directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘cfg_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_CFG_DIR,
‘doc’ => ‘directory where modifiable configuration files are installed’,
‘prompt’ => ‘PEAR configuration file directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘www_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_WWW_DIR,
‘doc’ => ‘directory where www frontend files (html/js) are installed’,
‘prompt’ => ‘PEAR www files directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘man_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_MAN_DIR,
‘doc’ => ‘directory where unix manual pages are installed’,
‘prompt’ => ‘Systems manpage files directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘test_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_TEST_DIR,
‘doc’ => ‘directory where regression tests are installed’,
‘prompt’ => ‘PEAR test directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘cache_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_CACHE_DIR,
‘doc’ => ‘directory which is used for web service cache’,
‘prompt’ => ‘PEAR Installer cache directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘temp_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_TEMP_DIR,
‘doc’ => ‘directory which is used for all temp files’,
‘prompt’ => ‘PEAR Installer temp directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘download_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_DOWNLOAD_DIR,
‘doc’ => ‘directory which is used for all downloaded files’,
‘prompt’ => ‘PEAR Installer download directory’,
‘group’ => ‘File Locations (Advanced)’,
),
‘php_bin’ => array(
‘type’ => ‘file’,
‘default’ => PEAR_CONFIG_DEFAULT_PHP_BIN,
‘doc’ => ‘PHP CLI/CGI binary for executing scripts’,
‘prompt’ => ‘PHP CLI/CGI binary’,
‘group’ => ‘File Locations (Advanced)’,
),
‘php_prefix’ => array(
‘type’ => ‘string’,
‘default’ => ”,
‘doc’ => ‘–program-prefix for php_bin\’s ./configure, used for pecl installs’,
‘prompt’ => ‘–program-prefix passed to PHP\’s ./configure’,
‘group’ => ‘File Locations (Advanced)’,
),
‘php_suffix’ => array(
‘type’ => ‘string’,
‘default’ => ”,
‘doc’ => ‘–program-suffix for php_bin\’s ./configure, used for pecl installs’,
‘prompt’ => ‘–program-suffix passed to PHP\’s ./configure’,
‘group’ => ‘File Locations (Advanced)’,
),
‘php_ini’ => array(
‘type’ => ‘file’,
‘default’ => ”,
‘doc’ => ‘location of php.ini in which to enable PECL extensions on install’,
‘prompt’ => ‘php.ini location’,
‘group’ => ‘File Locations (Advanced)’,
),
‘metadata_dir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_METADATA_DIR,
‘doc’ => ‘directory where metadata files are installed (registry, filemap, channels, …)’,
‘prompt’ => ‘PEAR metadata directory’,
‘group’ => ‘File Locations (Advanced)’,
),
// Maintainers
‘username’ => array(
‘type’ => ‘string’,
‘default’ => ”,
‘doc’ => ‘(maintainers) your PEAR account name’,
‘prompt’ => ‘PEAR username (for maintainers)’,
‘group’ => ‘Maintainers’,
),
‘password’ => array(
‘type’ => ‘password’,
‘default’ => ”,
‘doc’ => ‘(maintainers) your PEAR account password’,
‘prompt’ => ‘PEAR password (for maintainers)’,
‘group’ => ‘Maintainers’,
),
// Advanced
‘verbose’ => array(
‘type’ => ‘integer’,
‘default’ => PEAR_CONFIG_DEFAULT_VERBOSE,
‘doc’ => ‘verbosity level
0: really quiet
1: somewhat quiet
2: verbose
3: debug’,
‘prompt’ => ‘Debug Log Level’,
‘group’ => ‘Advanced’,
),
‘preferred_state’ => array(
‘type’ => ‘set’,
‘default’ => PEAR_CONFIG_DEFAULT_PREFERRED_STATE,
‘doc’ => ‘the installer will prefer releases with this state when installing packages without a version or state specified’,
‘valid_set’ => array(
‘stable’, ‘beta’, ‘alpha’, ‘devel’, ‘snapshot’),
‘prompt’ => ‘Preferred Package State’,
‘group’ => ‘Advanced’,
),
‘umask’ => array(
‘type’ => ‘mask’,
‘default’ => PEAR_CONFIG_DEFAULT_UMASK,
‘doc’ => ‘umask used when creating files (Unix-like systems only)’,
‘prompt’ => ‘Unix file mask’,
‘group’ => ‘Advanced’,
),
‘cache_ttl’ => array(
‘type’ => ‘integer’,
‘default’ => PEAR_CONFIG_DEFAULT_CACHE_TTL,
‘doc’ => ‘amount of secs where the local cache is used and not updated’,
‘prompt’ => ‘Cache TimeToLive’,
‘group’ => ‘Advanced’,
),
‘sig_type’ => array(
‘type’ => ‘set’,
‘default’ => PEAR_CONFIG_DEFAULT_SIG_TYPE,
‘doc’ => ‘which package signature mechanism to use’,
‘valid_set’ => array(‘gpg’),
‘prompt’ => ‘Package Signature Type’,
‘group’ => ‘Maintainers’,
),
‘sig_bin’ => array(
‘type’ => ‘string’,
‘default’ => PEAR_CONFIG_DEFAULT_SIG_BIN,
‘doc’ => ‘which package signature mechanism to use’,
‘prompt’ => ‘Signature Handling Program’,
‘group’ => ‘Maintainers’,
),
‘sig_keyid’ => array(
‘type’ => ‘string’,
‘default’ => ”,
‘doc’ => ‘which key to use for signing with’,
‘prompt’ => ‘Signature Key Id’,
‘group’ => ‘Maintainers’,
),
‘sig_keydir’ => array(
‘type’ => ‘directory’,
‘default’ => PEAR_CONFIG_DEFAULT_SIG_KEYDIR,
‘doc’ => ‘directory where signature keys are located’,
‘prompt’ => ‘Signature Key Directory’,
‘group’ => ‘Maintainers’,
),
// __channels is reserved – used for channel-specific configuration
);

/**
* Constructor.
*
* @param string file to read user-defined options from
* @param string file to read system-wide defaults from
* @param bool determines whether a registry object “follows”
* the value of php_dir (is automatically created
* and moved when php_dir is changed)
* @param bool if true, fails if configuration files cannot be loaded
*
* @access public
*
* @see PEAR_Config::singleton
*/
function __construct($user_file = ”, $system_file = ”, $ftp_file = false,
$strict = true)
{
parent::__construct();
PEAR_Installer_Role::initializeConfig($this);
$sl = DIRECTORY_SEPARATOR;
if (empty($user_file)) {
if (OS_WINDOWS) {
$user_file = PEAR_CONFIG_SYSCONFDIR . $sl . ‘pear.ini’;
} else {
$user_file = getenv(‘HOME’) . $sl . ‘.pearrc’;
}
}

if (empty($system_file)) {
$system_file = PEAR_CONFIG_SYSCONFDIR . $sl;
if (OS_WINDOWS) {
$system_file .= ‘pearsys.ini’;
} else {
$system_file .= ‘pear.conf’;
}
}

$this->layers = array_keys($this->configuration);
$this->files[‘user’] = $user_file;
$this->files[‘system’] = $system_file;
if ($user_file && file_exists($user_file)) {
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$this->readConfigFile($user_file, ‘user’, $strict);
$this->popErrorHandling();
if ($this->_errorsFound > 0) {
return;
}
}

if ($system_file && @file_exists($system_file)) {
$this->mergeConfigFile($system_file, false, ‘system’, $strict);
if ($this->_errorsFound > 0) {
return;
}

}

if (!$ftp_file) {
$ftp_file = $this->get(‘remote_config’);
}

if ($ftp_file && defined(‘PEAR_REMOTEINSTALL_OK’)) {
$this->readFTPConfigFile($ftp_file);
}

foreach ($this->configuration_info as $key => $info) {
$this->configuration[‘default’][$key] = $info[‘default’];
}

$this->_registry[‘default’] = new PEAR_Registry(
$this->configuration[‘default’][‘php_dir’], false, false,
$this->configuration[‘default’][‘metadata_dir’]);
$this->_registry[‘default’]->setConfig($this, false);
$this->_regInitialized[‘default’] = false;
//$GLOBALS[‘_PEAR_Config_instance’] = &$this;
}

/**
* Return the default locations of user and system configuration files
*/
public static function getDefaultConfigFiles()
{
$sl = DIRECTORY_SEPARATOR;
if (OS_WINDOWS) {
return array(
‘user’ => PEAR_CONFIG_SYSCONFDIR . $sl . ‘pear.ini’,
‘system’ => PEAR_CONFIG_SYSCONFDIR . $sl . ‘pearsys.ini’
);
}

return array(
‘user’ => getenv(‘HOME’) . $sl . ‘.pearrc’,
‘system’ => PEAR_CONFIG_SYSCONFDIR . $sl . ‘pear.conf’
);
}

/**
* Static singleton method. If you want to keep only one instance
* of this class in use, this method will give you a reference to
* the last created PEAR_Config object if one exists, or create a
* new object.
*
* @param string (optional) file to read user-defined options from
* @param string (optional) file to read system-wide defaults from
*
* @return object an existing or new PEAR_Config instance
*
* @see PEAR_Config::PEAR_Config
*/
public static function &singleton($user_file = ”, $system_file = ”, $strict = true)
{
if (is_object($GLOBALS[‘_PEAR_Config_instance’])) {
return $GLOBALS[‘_PEAR_Config_instance’];
}

$t_conf = new PEAR_Config($user_file, $system_file, false, $strict);
if ($t_conf->_errorsFound > 0) {
return $t_conf->lastError;
}

$GLOBALS[‘_PEAR_Config_instance’] = &$t_conf;
return $GLOBALS[‘_PEAR_Config_instance’];
}

/**
* Determine whether any configuration files have been detected, and whether a
* registry object can be retrieved from this configuration.
* @return bool
* @since PEAR 1.4.0a1
*/
function validConfiguration()
{
if ($this->isDefinedLayer(‘user’) || $this->isDefinedLayer(‘system’)) {
return true;
}

return false;
}

/**
* Reads configuration data from a file. All existing values in
* the config layer are discarded and replaced with data from the
* file.
* @param string file to read from, if NULL or not specified, the
* last-used file for the same layer (second param) is used
* @param string config layer to insert data into (‘user’ or ‘system’)
* @return bool TRUE on success or a PEAR error on failure
*/
function readConfigFile($file = null, $layer = ‘user’, $strict = true)
{
if (empty($this->files[$layer])) {
return $this->raiseError(“unknown config layer `$layer'”);
}

if ($file === null) {
$file = $this->files[$layer];
}

$data = $this->_readConfigDataFrom($file);
if (PEAR::isError($data)) {
if (!$strict) {
return true;
}

$this->_errorsFound++;
$this->lastError = $data;

return $data;
}

$this->files[$layer] = $file;
$this->_decodeInput($data);
$this->configuration[$layer] = $data;
$this->_setupChannels();
if (!$this->_noRegistry && ($phpdir = $this->get(‘php_dir’, $layer, ‘pear.php.net’))) {
$this->_registry[$layer] = new PEAR_Registry(
$phpdir, false, false,
$this->get(‘metadata_dir’, $layer, ‘pear.php.net’));
$this->_registry[$layer]->setConfig($this, false);
$this->_regInitialized[$layer] = false;
} else {
unset($this->_registry[$layer]);
}
return true;
}

/**
* @param string url to the remote config file, like ftp://www.example.com/pear/config.ini
* @return true|PEAR_Error
*/
function readFTPConfigFile($path)
{
do { // poor man’s try
if (!class_exists(‘PEAR_FTP’)) {
if (!class_exists(‘PEAR_Common’)) {
require_once ‘PEAR/Common.php’;
}
if (PEAR_Common::isIncludeable(‘PEAR/FTP.php’)) {
require_once ‘PEAR/FTP.php’;
}
}

if (!class_exists(‘PEAR_FTP’)) {
return PEAR::raiseError(‘PEAR_RemoteInstaller must be installed to use remote config’);
}

$this->_ftp = new PEAR_FTP;
$this->_ftp->pushErrorHandling(PEAR_ERROR_RETURN);
$e = $this->_ftp->init($path);
if (PEAR::isError($e)) {
$this->_ftp->popErrorHandling();
return $e;
}

$tmp = System::mktemp(‘-d’);
PEAR_Common::addTempFile($tmp);
$e = $this->_ftp->get(basename($path), $tmp . DIRECTORY_SEPARATOR .
‘pear.ini’, false, FTP_BINARY);
if (PEAR::isError($e)) {
$this->_ftp->popErrorHandling();
return $e;
}

PEAR_Common::addTempFile($tmp . DIRECTORY_SEPARATOR . ‘pear.ini’);
$this->_ftp->disconnect();
$this->_ftp->popErrorHandling();
$this->files[‘ftp’] = $tmp . DIRECTORY_SEPARATOR . ‘pear.ini’;
$e = $this->readConfigFile(null, ‘ftp’);
if (PEAR::isError($e)) {
return $e;
}

$fail = array();
foreach ($this->configuration_info as $key => $val) {
if (in_array($this->getGroup($key),
array(‘File Locations’, ‘File Locations (Advanced)’)) &&
$this->getType($key) == ‘directory’) {
// any directory configs must be set for this to work
if (!isset($this->configuration[‘ftp’][$key])) {
$fail[] = $key;
}
}
}

if (!count($fail)) {
return true;
}

$fail = ‘”‘ . implode(‘”, “‘, $fail) . ‘”‘;
unset($this->files[‘ftp’]);
unset($this->configuration[‘ftp’]);
return PEAR::raiseError(‘ERROR: Ftp configuration file must set all ‘ .
‘directory configuration variables. These variables were not set: ‘ .
$fail);
} while (false); // poor man’s catch
unset($this->files[‘ftp’]);
return PEAR::raiseError(‘no remote host specified’);
}

/**
* Reads the existing configurations and creates the _channels array from it
*/
function _setupChannels()
{
$set = array_flip(array_values($this->_channels));
foreach ($this->configuration as $layer => $data) {
$i = 1000;
if (isset($data[‘__channels’]) && is_array($data[‘__channels’])) {
foreach ($data[‘__channels’] as $channel => $info) {
$set[$channel] = $i++;
}
}
}
$this->_channels = array_values(array_flip($set));
$this->setChannels($this->_channels);
}

function deleteChannel($channel)
{
$ch = strtolower($channel);
foreach ($this->configuration as $layer => $data) {
if (isset($data[‘__channels’]) && isset($data[‘__channels’][$ch])) {
unset($this->configuration[$layer][‘__channels’][$ch]);
}
}

$this->_channels = array_flip($this->_channels);
unset($this->_channels[$ch]);
$this->_channels = array_flip($this->_channels);
}

/**
* Merges data into a config layer from a file. Does the same
* thing as readConfigFile, except it does not replace all
* existing values in the config layer.
* @param string file to read from
* @param bool whether to overwrite existing data (default TRUE)
* @param string config layer to insert data into (‘user’ or ‘system’)
* @param string if true, errors are returned if file opening fails
* @return bool TRUE on success or a PEAR error on failure
*/
function mergeConfigFile($file, $override = true, $layer = ‘user’, $strict = true)
{
if (empty($this->files[$layer])) {
return $this->raiseError(“unknown config layer `$layer'”);
}

if ($file === null) {
$file = $this->files[$layer];
}

$data = $this->_readConfigDataFrom($file);
if (PEAR::isError($data)) {
if (!$strict) {
return true;
}

$this->_errorsFound++;
$this->lastError = $data;

return $data;
}

$this->_decodeInput($data);
if ($override) {
$this->configuration[$layer] =
PEAR_Config::arrayMergeRecursive($this->configuration[$layer], $data);
} else {
$this->configuration[$layer] =
PEAR_Config::arrayMergeRecursive($data, $this->configuration[$layer]);
}

$this->_setupChannels();
if (!$this->_noRegistry && ($phpdir = $this->get(‘php_dir’, $layer, ‘pear.php.net’))) {
$this->_registry[$layer] = new PEAR_Registry(
$phpdir, false, false,
$this->get(‘metadata_dir’, $layer, ‘pear.php.net’));
$this->_registry[$layer]->setConfig($this, false);
$this->_regInitialized[$layer] = false;
} else {
unset($this->_registry[$layer]);
}
return true;
}

/**
* @param array
* @param array
* @return array
*/
public static function arrayMergeRecursive($arr2, $arr1)
{
$ret = array();
foreach ($arr2 as $key => $data) {
if (!isset($arr1[$key])) {
$ret[$key] = $data;
unset($arr1[$key]);
continue;
}
if (is_array($data)) {
if (!is_array($arr1[$key])) {
$ret[$key] = $arr1[$key];
unset($arr1[$key]);
continue;
}
$ret[$key] = PEAR_Config::arrayMergeRecursive($arr1[$key], $arr2[$key]);
unset($arr1[$key]);
}
}

return array_merge($ret, $arr1);
}

/**
* Writes data into a config layer from a file.
*
* @param string|null file to read from, or null for default
* @param string config layer to insert data into (‘user’ or
* ‘system’)
* @param string|null data to write to config file or null for internal data [DEPRECATED]
* @return bool TRUE on success or a PEAR error on failure
*/
function writeConfigFile($file = null, $layer = ‘user’, $data = null)
{
$this->_lazyChannelSetup($layer);
if ($layer == ‘both’ || $layer == ‘all’) {
foreach ($this->files as $type => $file) {
$err = $this->writeConfigFile($file, $type, $data);
if (PEAR::isError($err)) {
return $err;
}
}
return true;
}

if (empty($this->files[$layer])) {
return $this->raiseError(“unknown config file type `$layer'”);
}

if ($file === null) {
$file = $this->files[$layer];
}

$data = ($data === null) ? $this->configuration[$layer] : $data;
$this->_encodeOutput($data);
$opt = array(‘-p’, dirname($file));
if (!@System::mkDir($opt)) {
return $this->raiseError(“could not create directory: ” . dirname($file));
}

if (file_exists($file) && is_file($file) && !is_writeable($file)) {
return $this->raiseError(“no write access to $file!”);
}

$fp = @fopen($file, “w”);
if (!$fp) {
return $this->raiseError(“PEAR_Config::writeConfigFile fopen(‘$file’,’w’) failed ($php_errormsg)”);
}

$contents = “#PEAR_Config 0.9\n” . serialize($data);
if (!@fwrite($fp, $contents)) {
return $this->raiseError(“PEAR_Config::writeConfigFile: fwrite failed ($php_errormsg)”);
}
return true;
}

/**
* Reads configuration data from a file and returns the parsed data
* in an array.
*
* @param string file to read from
* @return array configuration data or a PEAR error on failure
* @access private
*/
function _readConfigDataFrom($file)
{
$fp = false;
if (file_exists($file)) {
$fp = @fopen($file, “r”);
}

if (!$fp) {
return $this->raiseError(“PEAR_Config::readConfigFile fopen(‘$file’,’r’) failed”);
}

$size = filesize($file);
fclose($fp);
$contents = file_get_contents($file);
if (empty($contents)) {
return $this->raiseError(‘Configuration file “‘ . $file . ‘” is empty’);
}

$version = false;
if (preg_match(‘/^#PEAR_Config\s+(\S+)\s+/si’, $contents, $matches)) {
$version = $matches[1];
$contents = substr($contents, strlen($matches[0]));
} else {
// Museum config file
if (substr($contents,0,2) == ‘a:’) {
$version = ‘0.1’;
}
}

if ($version && version_compare(“$version”, ‘1’, ‘<')) { // no '@', it is possible that unserialize // raises a notice but it seems to block IO to // STDOUT if a '@' is used and a notice is raise $data = unserialize($contents); if (!is_array($data) && !$data) { if ($contents == serialize(false)) { $data = array(); } else { $err = $this->raiseError(“PEAR_Config: bad data in $file”);
return $err;
}
}
if (!is_array($data)) {
if (strlen(trim($contents)) > 0) {
$error = “PEAR_Config: bad data in $file”;
$err = $this->raiseError($error);
return $err;
}

$data = array();
}
// add parsing of newer formats here…
} else {
$err = $this->raiseError(“$file: unknown version `$version'”);
return $err;
}

return $data;
}

/**
* Gets the file used for storing the config for a layer
*
* @param string $layer ‘user’ or ‘system’
*/
function getConfFile($layer)
{
return $this->files[$layer];
}

/**
* @param string Configuration class name, used for detecting duplicate calls
* @param array information on a role as parsed from its xml file
* @return true|PEAR_Error
* @access private
*/
function _addConfigVars($class, $vars)
{
static $called = array();
if (isset($called[$class])) {
return;
}

$called[$class] = 1;
if (count($vars) > 3) {
return $this->raiseError(‘Roles can only define 3 new config variables or less’);
}

foreach ($vars as $name => $var) {
if (!is_array($var)) {
return $this->raiseError(‘Configuration information must be an array’);
}

if (!isset($var[‘type’])) {
return $this->raiseError(‘Configuration information must contain a type’);
} elseif (!in_array($var[‘type’],
array(‘string’, ‘mask’, ‘password’, ‘directory’, ‘file’, ‘set’))) {
return $this->raiseError(
‘Configuration type must be one of directory, file, string, ‘ .
‘mask, set, or password’);
}
if (!isset($var[‘default’])) {
return $this->raiseError(
‘Configuration information must contain a default value (“default” index)’);
}

if (is_array($var[‘default’])) {
$real_default = ”;
foreach ($var[‘default’] as $config_var => $val) {
if (strpos($config_var, ‘text’) === 0) {
$real_default .= $val;
} elseif (strpos($config_var, ‘constant’) === 0) {
if (!defined($val)) {
return $this->raiseError(
‘Unknown constant “‘ . $val . ‘” requested in ‘ .
‘default value for configuration variable “‘ .
$name . ‘”‘);
}

$real_default .= constant($val);
} elseif (isset($this->configuration_info[$config_var])) {
$real_default .=
$this->configuration_info[$config_var][‘default’];
} else {
return $this->raiseError(
‘Unknown request for “‘ . $config_var . ‘” value in ‘ .
‘default value for configuration variable “‘ .
$name . ‘”‘);
}
}
$var[‘default’] = $real_default;
}

if ($var[‘type’] == ‘integer’) {
$var[‘default’] = (integer) $var[‘default’];
}

if (!isset($var[‘doc’])) {
return $this->raiseError(
‘Configuration information must contain a summary (“doc” index)’);
}

if (!isset($var[‘prompt’])) {
return $this->raiseError(
‘Configuration information must contain a simple prompt (“prompt” index)’);
}

if (!isset($var[‘group’])) {
return $this->raiseError(
‘Configuration information must contain a simple group (“group” index)’);
}

if (isset($this->configuration_info[$name])) {
return $this->raiseError(‘Configuration variable “‘ . $name .
‘” already exists’);
}

$this->configuration_info[$name] = $var;
// fix bug #7351: setting custom config variable in a channel fails
$this->_channelConfigInfo[] = $name;
}

return true;
}

/**
* Encodes/scrambles configuration data before writing to files.
* Currently, ‘password’ values will be base64-encoded as to avoid
* that people spot cleartext passwords by accident.
*
* @param array (reference) array to encode values in
* @return bool TRUE on success
* @access private
*/
function _encodeOutput(&$data)
{
foreach ($data as $key => $value) {
if ($key == ‘__channels’) {
foreach ($data[‘__channels’] as $channel => $blah) {
$this->_encodeOutput($data[‘__channels’][$channel]);
}
}

if (!isset($this->configuration_info[$key])) {
continue;
}

$type = $this->configuration_info[$key][‘type’];
switch ($type) {
// we base64-encode passwords so they are at least
// not shown in plain by accident
case ‘password’: {
$data[$key] = base64_encode($data[$key]);
break;
}
case ‘mask’: {
$data[$key] = octdec($data[$key]);
break;
}
}
}

return true;
}

/**
* Decodes/unscrambles configuration data after reading from files.
*
* @param array (reference) array to encode values in
* @return bool TRUE on success
* @access private
*
* @see PEAR_Config::_encodeOutput
*/
function _decodeInput(&$data)
{
if (!is_array($data)) {
return true;
}

foreach ($data as $key => $value) {
if ($key == ‘__channels’) {
foreach ($data[‘__channels’] as $channel => $blah) {
$this->_decodeInput($data[‘__channels’][$channel]);
}
}

if (!isset($this->configuration_info[$key])) {
continue;
}

$type = $this->configuration_info[$key][‘type’];
switch ($type) {
case ‘password’: {
$data[$key] = base64_decode($data[$key]);
break;
}
case ‘mask’: {
$data[$key] = decoct($data[$key]);
break;
}
}
}

return true;
}

/**
* Retrieve the default channel.
*
* On startup, channels are not initialized, so if the default channel is not
* pear.php.net, then initialize the config.
* @param string registry layer
* @return string|false
*/
function getDefaultChannel($layer = null)
{
$ret = false;
if ($layer === null) {
foreach ($this->layers as $layer) {
if (isset($this->configuration[$layer][‘default_channel’])) {
$ret = $this->configuration[$layer][‘default_channel’];
break;
}
}
} elseif (isset($this->configuration[$layer][‘default_channel’])) {
$ret = $this->configuration[$layer][‘default_channel’];
}

if ($ret == ‘pear.php.net’ && defined(‘PEAR_RUNTYPE’) && PEAR_RUNTYPE == ‘pecl’) {
$ret = ‘pecl.php.net’;
}

if ($ret) {
if ($ret != ‘pear.php.net’) {
$this->_lazyChannelSetup();
}

return $ret;
}

return PEAR_CONFIG_DEFAULT_CHANNEL;
}

/**
* Returns a configuration value, prioritizing layers as per the
* layers property.
*
* @param string config key
* @return mixed the config value, or NULL if not found
* @access public
*/
function get($key, $layer = null, $channel = false)
{
if (!isset($this->configuration_info[$key])) {
return null;
}

if ($key == ‘__channels’) {
return null;
}

if ($key == ‘default_channel’) {
return $this->getDefaultChannel($layer);
}

if (!$channel) {
$channel = $this->getDefaultChannel();
} elseif ($channel != ‘pear.php.net’) {
$this->_lazyChannelSetup();
}
$channel = strtolower($channel);

$test = (in_array($key, $this->_channelConfigInfo)) ?
$this->_getChannelValue($key, $layer, $channel) :
null;
if ($test !== null) {
if ($this->_installRoot) {
if (in_array($this->getGroup($key),
array(‘File Locations’, ‘File Locations (Advanced)’)) &&
$this->getType($key) == ‘directory’) {
return $this->_prependPath($test, $this->_installRoot);
}
}
return $test;
}

if ($layer === null) {
foreach ($this->layers as $layer) {
if (isset($this->configuration[$layer][$key])) {
$test = $this->configuration[$layer][$key];
if ($this->_installRoot) {
if (in_array($this->getGroup($key),
array(‘File Locations’, ‘File Locations (Advanced)’)) &&
$this->getType($key) == ‘directory’) {
return $this->_prependPath($test, $this->_installRoot);
}
}

if ($key == ‘preferred_mirror’) {
$reg = &$this->getRegistry();
if (is_object($reg)) {
$chan = $reg->getChannel($channel);
if (PEAR::isError($chan)) {
return $channel;
}

if (!$chan->getMirror($test) && $chan->getName() != $test) {
return $channel; // mirror does not exist
}
}
}
return $test;
}
}
} elseif (isset($this->configuration[$layer][$key])) {
$test = $this->configuration[$layer][$key];
if ($this->_installRoot) {
if (in_array($this->getGroup($key),
array(‘File Locations’, ‘File Locations (Advanced)’)) &&
$this->getType($key) == ‘directory’) {
return $this->_prependPath($test, $this->_installRoot);
}
}

if ($key == ‘preferred_mirror’) {
$reg = &$this->getRegistry();
if (is_object($reg)) {
$chan = $reg->getChannel($channel);
if (PEAR::isError($chan)) {
return $channel;
}

if (!$chan->getMirror($test) && $chan->getName() != $test) {
return $channel; // mirror does not exist
}
}
}

return $test;
}

return null;
}

/**
* Returns a channel-specific configuration value, prioritizing layers as per the
* layers property.
*
* @param string config key
* @return mixed the config value, or NULL if not found
* @access private
*/
function _getChannelValue($key, $layer, $channel)
{
if ($key == ‘__channels’ || $channel == ‘pear.php.net’) {
return null;
}

$ret = null;
if ($layer === null) {
foreach ($this->layers as $ilayer) {
if (isset($this->configuration[$ilayer][‘__channels’][$channel][$key])) {
$ret = $this->configuration[$ilayer][‘__channels’][$channel][$key];
break;
}
}
} elseif (isset($this->configuration[$layer][‘__channels’][$channel][$key])) {
$ret = $this->configuration[$layer][‘__channels’][$channel][$key];
}

if ($key != ‘preferred_mirror’) {
return $ret;
}

if ($ret !== null) {
$reg = &$this->getRegistry($layer);
if (is_object($reg)) {
$chan = $reg->getChannel($channel);
if (PEAR::isError($chan)) {
return $channel;
}

if (!$chan->getMirror($ret) && $chan->getName() != $ret) {
return $channel; // mirror does not exist
}
}

return $ret;
}

if ($channel != $this->getDefaultChannel($layer)) {
return $channel; // we must use the channel name as the preferred mirror
// if the user has not chosen an alternate
}

return $this->getDefaultChannel($layer);
}

/**
* Set a config value in a specific layer (defaults to ‘user’).
* Enforces the types defined in the configuration_info array. An
* integer config variable will be cast to int, and a set config
* variable will be validated against its legal values.
*
* @param string config key
* @param string config value
* @param string (optional) config layer
* @param string channel to set this value for, or null for global value
* @return bool TRUE on success, FALSE on failure
*/
function set($key, $value, $layer = ‘user’, $channel = false)
{
if ($key == ‘__channels’) {
return false;
}

if (!isset($this->configuration[$layer])) {
return false;
}

if ($key == ‘default_channel’) {
// can only set this value globally
$channel = ‘pear.php.net’;
if ($value != ‘pear.php.net’) {
$this->_lazyChannelSetup($layer);
}
}

if ($key == ‘preferred_mirror’) {
if ($channel == ‘__uri’) {
return false; // can’t set the __uri pseudo-channel’s mirror
}

$reg = &$this->getRegistry($layer);
if (is_object($reg)) {
$chan = $reg->getChannel($channel ? $channel : ‘pear.php.net’);
if (PEAR::isError($chan)) {
return false;
}

if (!$chan->getMirror($value) && $chan->getName() != $value) {
return false; // mirror does not exist
}
}
}

if (!isset($this->configuration_info[$key])) {
return false;
}

extract($this->configuration_info[$key]);
switch ($type) {
case ‘integer’:
$value = (int)$value;
break;
case ‘set’: {
// If a valid_set is specified, require the value to
// be in the set. If there is no valid_set, accept
// any value.
if ($valid_set) {
reset($valid_set);
if ((key($valid_set) === 0 && !in_array($value, $valid_set)) ||
(key($valid_set) !== 0 && empty($valid_set[$value])))
{
return false;
}
}
break;
}
}

if (!$channel) {
$channel = $this->get(‘default_channel’, null, ‘pear.php.net’);
}

if (!in_array($channel, $this->_channels)) {
$this->_lazyChannelSetup($layer);
$reg = &$this->getRegistry($layer);
if ($reg) {
$channel = $reg->channelName($channel);
}

if (!in_array($channel, $this->_channels)) {
return false;
}
}

if ($channel != ‘pear.php.net’) {
if (in_array($key, $this->_channelConfigInfo)) {
$this->configuration[$layer][‘__channels’][$channel][$key] = $value;
return true;
}

return false;
}

if ($key == ‘default_channel’) {
if (!isset($reg)) {
$reg = &$this->getRegistry($layer);
if (!$reg) {
$reg = &$this->getRegistry();
}
}

if ($reg) {
$value = $reg->channelName($value);
}

if (!$value) {
return false;
}
}

$this->configuration[$layer][$key] = $value;
if ($key == ‘php_dir’ && !$this->_noRegistry) {
if (!isset($this->_registry[$layer]) ||
$value != $this->_registry[$layer]->install_dir) {
$this->_registry[$layer] = new PEAR_Registry($value);
$this->_regInitialized[$layer] = false;
$this->_registry[$layer]->setConfig($this, false);
}
}

return true;
}

function _lazyChannelSetup($uselayer = false)
{
if ($this->_noRegistry) {
return;
}

$merge = false;
foreach ($this->_registry as $layer => $p) {
if ($uselayer && $uselayer != $layer) {
continue;
}

if (!$this->_regInitialized[$layer]) {
if ($layer == ‘default’ && isset($this->_registry[‘user’]) ||
isset($this->_registry[‘system’])) {
// only use the default registry if there are no alternatives
continue;
}

if (!is_object($this->_registry[$layer])) {
if ($phpdir = $this->get(‘php_dir’, $layer, ‘pear.php.net’)) {
$this->_registry[$layer] = new PEAR_Registry(
$phpdir, false, false,
$this->get(‘metadata_dir’, $layer, ‘pear.php.net’));
$this->_registry[$layer]->setConfig($this, false);
$this->_regInitialized[$layer] = false;
} else {
unset($this->_registry[$layer]);
return;
}
}

$this->setChannels($this->_registry[$layer]->listChannels(), $merge);
$this->_regInitialized[$layer] = true;
$merge = true;
}
}
}

/**
* Set the list of channels.
*
* This should be set via a call to {@link PEAR_Registry::listChannels()}
* @param array
* @param bool
* @return bool success of operation
*/
function setChannels($channels, $merge = false)
{
if (!is_array($channels)) {
return false;
}

if ($merge) {
$this->_channels = array_merge($this->_channels, $channels);
} else {
$this->_channels = $channels;
}

foreach ($channels as $channel) {
$channel = strtolower($channel);
if ($channel == ‘pear.php.net’) {
continue;
}

foreach ($this->layers as $layer) {
if (!isset($this->configuration[$layer][‘__channels’])) {
$this->configuration[$layer][‘__channels’] = array();
}
if (!isset($this->configuration[$layer][‘__channels’][$channel])
|| !is_array($this->configuration[$layer][‘__channels’][$channel])) {
$this->configuration[$layer][‘__channels’][$channel] = array();
}
}
}

return true;
}

/**
* Get the type of a config value.
*
* @param string config key
*
* @return string type, one of “string”, “integer”, “file”,
* “directory”, “set” or “password”.
*
* @access public
*
*/
function getType($key)
{
if (isset($this->configuration_info[$key])) {
return $this->configuration_info[$key][‘type’];
}
return false;
}

/**
* Get the documentation for a config value.
*
* @param string config key
* @return string documentation string
*
* @access public
*
*/
function getDocs($key)
{
if (isset($this->configuration_info[$key])) {
return $this->configuration_info[$key][‘doc’];
}

return false;
}

/**
* Get the short documentation for a config value.
*
* @param string config key
* @return string short documentation string
*
* @access public
*
*/
function getPrompt($key)
{
if (isset($this->configuration_info[$key])) {
return $this->configuration_info[$key][‘prompt’];
}

return false;
}

/**
* Get the parameter group for a config key.
*
* @param string config key
* @return string parameter group
*
* @access public
*
*/
function getGroup($key)
{
if (isset($this->configuration_info[$key])) {
return $this->configuration_info[$key][‘group’];
}

return false;
}

/**
* Get the list of parameter groups.
*
* @return array list of parameter groups
*
* @access public
*
*/
function getGroups()
{
$tmp = array();
foreach ($this->configuration_info as $key => $info) {
$tmp[$info[‘group’]] = 1;
}

return array_keys($tmp);
}

/**
* Get the list of the parameters in a group.
*
* @param string $group parameter group
* @return array list of parameters in $group
*
* @access public
*
*/
function getGroupKeys($group)
{
$keys = array();
foreach ($this->configuration_info as $key => $info) {
if ($info[‘group’] == $group) {
$keys[] = $key;
}
}

return $keys;
}

/**
* Get the list of allowed set values for a config value. Returns
* NULL for config values that are not sets.
*
* @param string config key
* @return array enumerated array of set values, or NULL if the
* config key is unknown or not a set
*
* @access public
*
*/
function getSetValues($key)
{
if (isset($this->configuration_info[$key]) &&
isset($this->configuration_info[$key][‘type’]) &&
$this->configuration_info[$key][‘type’] == ‘set’)
{
$valid_set = $this->configuration_info[$key][‘valid_set’];
reset($valid_set);
if (key($valid_set) === 0) {
return $valid_set;
}

return array_keys($valid_set);
}

return null;
}

/**
* Get all the current config keys.
*
* @return array simple array of config keys
*
* @access public
*/
function getKeys()
{
$keys = array();
foreach ($this->layers as $layer) {
$test = $this->configuration[$layer];
if (isset($test[‘__channels’])) {
foreach ($test[‘__channels’] as $channel => $configs) {
$keys = array_merge($keys, $configs);
}
}

unset($test[‘__channels’]);
$keys = array_merge($keys, $test);

}
return array_keys($keys);
}

/**
* Remove the a config key from a specific config layer.
*
* @param string config key
* @param string (optional) config layer
* @param string (optional) channel (defaults to default channel)
* @return bool TRUE on success, FALSE on failure
*
* @access public
*/
function remove($key, $layer = ‘user’, $channel = null)
{
if ($channel === null) {
$channel = $this->getDefaultChannel();
}

if ($channel !== ‘pear.php.net’) {
if (isset($this->configuration[$layer][‘__channels’][$channel][$key])) {
unset($this->configuration[$layer][‘__channels’][$channel][$key]);
return true;
}
}

if (isset($this->configuration[$layer][$key])) {
unset($this->configuration[$layer][$key]);
return true;
}

return false;
}

/**
* Temporarily remove an entire config layer. USE WITH CARE!
*
* @param string config key
* @param string (optional) config layer
* @return bool TRUE on success, FALSE on failure
*
* @access public
*/
function removeLayer($layer)
{
if (isset($this->configuration[$layer])) {
$this->configuration[$layer] = array();
return true;
}

return false;
}

/**
* Stores configuration data in a layer.
*
* @param string config layer to store
* @return bool TRUE on success, or PEAR error on failure
*
* @access public
*/
function store($layer = ‘user’, $data = null)
{
return $this->writeConfigFile(null, $layer, $data);
}

/**
* Tells what config layer that gets to define a key.
*
* @param string config key
* @param boolean return the defining channel
*
* @return string|array the config layer, or an empty string if not found.
*
* if $returnchannel, the return is an array array(‘layer’ => layername,
* ‘channel’ => channelname), or an empty string if not found
*
* @access public
*/
function definedBy($key, $returnchannel = false)
{
foreach ($this->layers as $layer) {
$channel = $this->getDefaultChannel();
if ($channel !== ‘pear.php.net’) {
if (isset($this->configuration[$layer][‘__channels’][$channel][$key])) {
if ($returnchannel) {
return array(‘layer’ => $layer, ‘channel’ => $channel);
}
return $layer;
}
}

if (isset($this->configuration[$layer][$key])) {
if ($returnchannel) {
return array(‘layer’ => $layer, ‘channel’ => ‘pear.php.net’);
}
return $layer;
}
}

return ”;
}

/**
* Tells whether a given key exists as a config value.
*
* @param string config key
* @return bool whether exists in this object
*
* @access public
*/
function isDefined($key)
{
foreach ($this->layers as $layer) {
if (isset($this->configuration[$layer][$key])) {
return true;
}
}

return false;
}

/**
* Tells whether a given config layer exists.
*
* @param string config layer
* @return bool whether exists in this object
*
* @access public
*/
function isDefinedLayer($layer)
{
return isset($this->configuration[$layer]);
}

/**
* Returns the layers defined (except the ‘default’ one)
*
* @return array of the defined layers
*/
function getLayers()
{
$cf = $this->configuration;
unset($cf[‘default’]);
return array_keys($cf);
}

function apiVersion()
{
return ‘1.1’;
}

/**
* @return PEAR_Registry
*/
function &getRegistry($use = null)
{
$layer = $use === null ? ‘user’ : $use;
if (isset($this->_registry[$layer])) {
return $this->_registry[$layer];
} elseif ($use === null && isset($this->_registry[‘system’])) {
return $this->_registry[‘system’];
} elseif ($use === null && isset($this->_registry[‘default’])) {
return $this->_registry[‘default’];
} elseif ($use) {
$a = false;
return $a;
}

// only go here if null was passed in
echo “CRITICAL ERROR: Registry could not be initialized from any value”;
exit(1);
}

/**
* This is to allow customization like the use of installroot
* @param PEAR_Registry
* @return bool
*/
function setRegistry(&$reg, $layer = ‘user’)
{
if ($this->_noRegistry) {
return false;
}

if (!in_array($layer, array(‘user’, ‘system’))) {
return false;
}

$this->_registry[$layer] = &$reg;
if (is_object($reg)) {
$this->_registry[$layer]->setConfig($this, false);
}

return true;
}

function noRegistry()
{
$this->_noRegistry = true;
}

/**
* @return PEAR_REST
*/
function &getREST($version, $options = array())
{
$version = str_replace(‘.’, ”, $version);
if (!class_exists($class = ‘PEAR_REST_’ . $version)) {
require_once ‘PEAR/REST/’ . $version . ‘.php’;
}

$remote = new $class($this, $options);
return $remote;
}

/**
* The ftp server is set in {@link readFTPConfigFile()}. It exists only if a
* remote configuration file has been specified
* @return PEAR_FTP|false
*/
function &getFTP()
{
if (isset($this->_ftp)) {
return $this->_ftp;
}

$a = false;
return $a;
}

static function _prependPath($path, $prepend)
{
if (strlen($prepend) > 0) {
if (OS_WINDOWS && preg_match(‘/^[a-z]:/i’, $path)) {
if (preg_match(‘/^[a-z]:/i’, $prepend)) {
$prepend = substr($prepend, 2);
} elseif ($prepend[0] != ‘\\’) {
$prepend = “\\$prepend”;
}
$path = substr($path, 0, 2) . $prepend . substr($path, 2);
} else {
$path = $prepend . $path;
}
}
return $path;
}

/**
* @param string|false installation directory to prepend to all _dir variables, or false to
* disable
*/
function setInstallRoot($root)
{
if (substr($root, -1) == DIRECTORY_SEPARATOR) {
$root = substr($root, 0, -1);
}
$old = $this->_installRoot;
$this->_installRoot = $root;
if (($old != $root) && !$this->_noRegistry) {
foreach (array_keys($this->_registry) as $layer) {
if ($layer == ‘ftp’ || !isset($this->_registry[$layer])) {
continue;
}
$r = new PEAR_Registry(
$this->get(‘php_dir’, $layer, ‘pear.php.net’), false, false,
$this->get(‘metadata_dir’, $layer, ‘pear.php.net’));
$this->_registry[$layer] = &$r;
$this->_registry[$layer]->setConfig($this, false);
$this->_regInitialized[$layer] = false;
unset($r);
}
}
}
}