maintenance/getConfiguration.php

   1 <?php
   2 /**
   3  * Print serialized output of MediaWiki config vars.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  * @author Tim Starling
  23  * @author Antoine Musso <hashar@free.fr>
  24  */
  25
  26 require_once __DIR__ . '/Maintenance.php';
  27
  28 /**
  29  * Print serialized output of MediaWiki config vars
  30  *
  31  * @ingroup Maintenance
  32  */
  33 class GetConfiguration extends Maintenance {
  34
  35         protected $regex = null;
  36
  37         protected $settings_list = [];
  38
  39         /**
  40          * List of format output internally supported.
  41          * Each item MUST be lower case.
  42          */
  43         protected static $outFormats = [
  44                 'json',
  45                 'php',
  46                 'serialize',
  47                 'vardump',
  48         ];
  49
  50         public function __construct() {
  51                 parent::__construct();
  52                 $this->addDescription( 'Get serialized MediaWiki site configuration' );
  53                 $this->addOption( 'regex', 'regex to filter variables with', false, true );
  54                 $this->addOption( 'iregex', 'same as --regex but case insensitive', false, true );
  55                 $this->addOption( 'settings', 'Space-separated list of wg* variables', false, true );
  56                 $this->addOption( 'format', implode( ', ', self::$outFormats ), false, true );
  57         }
  58
  59         protected function validateParamsAndArgs() {
  60                 $error_out = false;
  61
  62                 # Get the format and make sure it is set to a valid default value
  63                 $format = strtolower( $this->getOption( 'format', 'PHP' ) );
  64
  65                 $validFormat = in_array( $format, self::$outFormats );
  66                 if ( !$validFormat ) {
  67                         $this->error( "--format set to an unrecognized format", 0 );
  68                         $error_out = true;
  69                 }
  70
  71                 if ( $this->getOption( 'regex' ) && $this->getOption( 'iregex' ) ) {
  72                         $this->error( "Can only use either --regex or --iregex" );
  73                         $error_out = true;
  74                 }
  75
  76                 parent::validateParamsAndArgs();
  77
  78                 if ( $error_out ) {
  79                         # Force help and quit
  80                         $this->maybeHelp( true );
  81                 }
  82         }
  83
  84         /**
  85          * finalSetup() since we need MWException
  86          */
  87         public function finalSetup() {
  88                 parent::finalSetup();
  89
  90                 $this->regex = $this->getOption( 'regex' ) ?: $this->getOption( 'iregex' );
  91                 if ( $this->regex ) {
  92                         $this->regex = '/' . $this->regex . '/';
  93                         if ( $this->hasOption( 'iregex' ) ) {
  94                                 $this->regex .= 'i'; # case insensitive regex
  95                         }
  96                 }
  97
  98                 if ( $this->hasOption( 'settings' ) ) {
  99                         $this->settings_list = explode( ' ', $this->getOption( 'settings' ) );
 100                         # Values validation
 101                         foreach ( $this->settings_list as $name ) {
 102                                 if ( !preg_match( '/^wg[A-Z]/', $name ) ) {
 103                                         throw new MWException( "Variable '$name' does start with 'wg'." );
 104                                 } elseif ( !isset( $GLOBALS[$name] ) ) {
 105                                         throw new MWException( "Variable '$name' is not set." );
 106                                 } elseif ( !$this->isAllowedVariable( $GLOBALS[$name] ) ) {
 107                                         throw new MWException( "Variable '$name' includes non-array, non-scalar, items." );
 108                                 }
 109                         }
 110                 }
 111         }
 112
 113         public function execute() {
 114                 // Settings we will display
 115                 $res = [];
 116
 117                 # Sane default: dump any wg / wmg variable
 118                 if ( !$this->regex && !$this->getOption( 'settings' ) ) {
 119                         $this->regex = '/^wm?g/';
 120                 }
 121
 122                 # Filter out globals based on the regex
 123                 if ( $this->regex ) {
 124                         $res = [];
 125                         foreach ( $GLOBALS as $name => $value ) {
 126                                 if ( preg_match( $this->regex, $name ) ) {
 127                                         $res[$name] = $value;
 128                                 }
 129                         }
 130                 }
 131
 132                 # Explicitly dumps a list of provided global names
 133                 if ( $this->settings_list ) {
 134                         foreach ( $this->settings_list as $name ) {
 135                                 $res[$name] = $GLOBALS[$name];
 136                         }
 137                 }
 138
 139                 ksort( $res );
 140
 141                 $out = null;
 142                 switch ( strtolower( $this->getOption( 'format' ) ) ) {
 143                         case 'serialize':
 144                         case 'php':
 145                                 $out = serialize( $res );
 146                                 break;
 147                         case 'vardump':
 148                                 $out = $this->formatVarDump( $res );
 149                                 break;
 150                         case 'json':
 151                                 $out = FormatJson::encode( $res );
 152                                 break;
 153                         default:
 154                                 throw new MWException( "Invalid serialization format given." );
 155                 }
 156                 if ( !is_string( $out ) ) {
 157                         throw new MWException( "Failed to serialize the requested settings." );
 158                 }
 159
 160                 if ( $out ) {
 161                         $this->output( $out . "\n" );
 162                 }
 163         }
 164
 165         protected function formatVarDump( $res ) {
 166                 $ret = '';
 167                 foreach ( $res as $key => $value ) {
 168                         ob_start(); # intercept var_dump() output
 169                         print "\${$key} = ";
 170                         var_dump( $value );
 171                         # grab var_dump() output and discard it from the output buffer
 172                         $ret .= trim( ob_get_clean() ) . ";\n";
 173                 }
 174
 175                 return trim( $ret, "\n" );
 176         }
 177
 178         private function isAllowedVariable( $value ) {
 179                 if ( is_array( $value ) ) {
 180                         foreach ( $value as $k => $v ) {
 181                                 if ( !$this->isAllowedVariable( $v ) ) {
 182                                         return false;
 183                                 }
 184                         }
 185
 186                         return true;
 187                 } elseif ( is_scalar( $value ) || $value === null ) {
 188                         return true;
 189                 }
 190
 191                 return false;
 192         }
 193 }
 194
 195 $maintClass = "GetConfiguration";
 196 require_once RUN_MAINTENANCE_IF_MAIN;