packagefile.php

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            PEAR_ErrorStack::staticPush('PEAR_PackageFile',
                PEAR_PACKAGEFILE_ERROR_NO_PACKAGEVERSION,
                'warning', array('xml' => $data), 'package.xml "' . $file .
                    '" has no package.xml <package> version');
            $object = &$this->parserFactory('1.0');
            $object->setConfig($this->_config);
            $pf = $object->parse($data, $file, $archive);
            if (PEAR::isError($pf)) {
                return $pf;
            }
            if ($this->_rawReturn) {
                return $pf;
            }
            if ($pf->validate($state)) {
                if ($this->_logger) {
                    if ($pf->getValidationWarnings(false)) {
                        foreach ($pf->getValidationWarnings() as $warning) {
                            $this->_logger->log(0, 'WARNING: ' . $warning['message']);
                        }
                    }
                }
                if (method_exists($pf, 'flattenFilelist')) {
                    $pf->flattenFilelist(); // for v2
                }
                return $pf;
            } else {
                $a = PEAR::raiseError('Parsing of package.xml from file "' . $file . '" failed',
                    2, null, null, $pf->getValidationWarnings());
                return $a;
            }
        }
    }

    /**
     * Register a temporary file or directory.  When the destructor is
     * executed, all registered temporary files and directories are
     * removed.
     *
     * @param string  $file  name of file or directory
     * @return  void
     */
    function addTempFile($file)
    {
        $GLOBALS['_PEAR_Common_tempfiles'][] = $file;
    }

    /**
     * Create a PEAR_PackageFile_v* from a compresed Tar or Tgz file.
     * @access  public
     * @param string contents of package.xml file
     * @param int package state (one of PEAR_VALIDATE_* constants)
     * @return  PEAR_PackageFile_v1|PEAR_PackageFile_v2
     * @using   Archive_Tar to extract the files
     * @using   fromPackageFile() to load the package after the package.xml
     *          file is extracted.
     */
    function &fromTgzFile($file, $state)
    {
        if (!class_exists('Archive_Tar')) {
            require_once 'Archive/Tar.php';
        }
        $tar = new Archive_Tar($file);
        if ($this->_debug <= 1) {
            $tar->pushErrorHandling(PEAR_ERROR_RETURN);
        }
        $content = $tar->listContent();
        if ($this->_debug <= 1) {
            $tar->popErrorHandling();
        }
        if (!is_array($content)) {
            if (is_string($file) && strlen($file < 255) &&
                  (!file_exists($file) || !@is_file($file))) {
                $ret = PEAR::raiseError("could not open file \"$file\"");
                return $ret;
            }
            $file = realpath($file);
            $ret = PEAR::raiseError("Could not get contents of package \"$file\"".
                                     '. Invalid tgz file.');
            return $ret;
        } else {
            if (!count($content) && !@is_file($file)) {
                $ret = PEAR::raiseError("could not open file \"$file\"");
                return $ret;
            }
        }
        $xml = null;
        $origfile = $file;
        foreach ($content as $file) {
            $name = $file['filename'];
            if ($name == 'package2.xml') { // allow a .tgz to distribute both versions
                $xml = $name;
                break;
            }
            if ($name == 'package.xml') {
                $xml = $name;
                break;
            } elseif (ereg('package.xml$', $name, $match)) {
                $xml = $name;
                break;
            }
        }
        if ($this->_tmpdir) {
            $tmpdir = $this->_tmpdir;
        } else {
            $tmpdir = System::mkTemp(array('-d', 'pear'));
            PEAR_PackageFile::addTempFile($tmpdir);
        }
        $this->_extractErrors();
        PEAR::staticPushErrorHandling(PEAR_ERROR_CALLBACK, array($this, '_extractErrors'));
        if (!$xml || !$tar->extractList(array($xml), $tmpdir)) {
            $extra = implode("\n", $this->_extractErrors());
            if ($extra) {
                $extra = ' ' . $extra;
            }
            PEAR::staticPopErrorHandling();
            $ret = PEAR::raiseError('could not extract the package.xml file from "' .
                $origfile . '"' . $extra);
            return $ret;
        }
        PEAR::staticPopErrorHandling();
        $ret = &PEAR_PackageFile::fromPackageFile("$tmpdir/$xml", $state, $origfile);
        return $ret;
    }

    /**
     * helper for extracting Archive_Tar errors
     * @var array
     * @access private
     */
    var $_extractErrors = array();

    /**
     * helper callback for extracting Archive_Tar errors
     *
     * @param PEAR_Error|null $err
     * @return array
     * @access private
     */
    function _extractErrors($err = null)
    {
        static $errors = array();
        if ($err === null) {
            $e = $errors;
            $errors = array();
            return $e;
        }
        $errors[] = $err->getMessage();
    }

    /**
     * Create a PEAR_PackageFile_v* from a package.xml file.
     *
     * @access public
     * @param   string  $descfile  name of package xml file
     * @param   int     $state package state (one of PEAR_VALIDATE_* constants)
     * @param   string|false $archive name of the archive this package.xml came
     *          from, if any
     * @return  PEAR_PackageFile_v1|PEAR_PackageFile_v2
     * @uses    PEAR_PackageFile::fromXmlString to create the oject after the
     *          XML is loaded from the package.xml file.
     */
    function &fromPackageFile($descfile, $state, $archive = false)
    {
        if (is_string($descfile) && strlen($descfile) < 255 &&
             (!file_exists($descfile) || !is_file($descfile) || !is_readable($descfile) ||
             (!$fp = @fopen($descfile, 'r')))) {
            $a = PEAR::raiseError("Unable to open $descfile");
            return $a;
        }

        // read the whole thing so we only get one cdata callback
        // for each block of cdata
        fclose($fp);
        $data = file_get_contents($descfile);
        $ret = &PEAR_PackageFile::fromXmlString($data, $state, $descfile, $archive);
        return $ret;
    }


    /**
     * Create a PEAR_PackageFile_v* from a .tgz archive or package.xml file.
     *
     * This method is able to extract information about a package from a .tgz
     * archive or from a XML package definition file.
     *
     * @access public
     * @param   string  $info file name
     * @param   int     $state package state (one of PEAR_VALIDATE_* constants)
     * @return  PEAR_PackageFile_v1|PEAR_PackageFile_v2
     * @uses    fromPackageFile() if the file appears to be XML
     * @uses    fromTgzFile() to load all non-XML files
     */
    function &fromAnyFile($info, $state)
    {
        if (is_dir($info)) {
            $dir_name = realpath($info);
            if (file_exists($dir_name . '/package.xml')) {
                $info = PEAR_PackageFile::fromPackageFile($dir_name .  '/package.xml', $state);
            } elseif (file_exists($dir_name .  '/package2.xml')) {
                $info = PEAR_PackageFile::fromPackageFile($dir_name .  '/package2.xml', $state);
            } else {
                $info = PEAR::raiseError("No package definition found in '$info' directory");
            }
            return $info;
        }

        $fp = false;
        if (is_string($info) && strlen($info) < 255 &&
             (file_exists($info) || ($fp = @fopen($info, 'r')))) {
            if ($fp) {
                fclose($fp);
            }
            $tmp = substr($info, -4);
            if ($tmp == '.xml') {
                $info = &PEAR_PackageFile::fromPackageFile($info, $state);
            } elseif ($tmp == '.tar' || $tmp == '.tgz') {
                $info = &PEAR_PackageFile::fromTgzFile($info, $state);
            } else {
                $fp = fopen($info, "r");
                $test = fread($fp, 5);
                fclose($fp);
                if ($test == "<?xml") {
                    $info = &PEAR_PackageFile::fromPackageFile($info, $state);
                } else {
                    $info = &PEAR_PackageFile::fromTgzFile($info, $state);
                }
            }
        } else {
            $info = PEAR::raiseError("Cannot open '$info' for parsing");
            return $info;
        }
        return $info;
    }
}

?>