maintenance/eval.php

   1 <?php
   2 /**
   3  * This script lets a command-line user start up the wiki engine and then poke
   4  * about by issuing PHP commands directly.
   5  *
   6  * Unlike eg Python, you need to use a 'return' statement explicitly for the
   7  * interactive shell to print out the value of the expression. Multiple lines
   8  * are evaluated separately, so blocks need to be input without a line break.
   9  * Fatal errors such as use of undeclared functions can kill the shell.
  10  *
  11  * To get decent line editing behavior, you should compile PHP with support
  12  * for GNU readline (pass --with-readline to configure).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along
  25  * with this program; if not, write to the Free Software Foundation, Inc.,
  26  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  27  * http://www.gnu.org/copyleft/gpl.html
  28  *
  29  * @file
  30  * @ingroup Maintenance
  31  */
  32
  33 $optionsWithArgs = array( 'd' );
  34
  35 /** */
  36 require_once __DIR__ . "/commandLine.inc";
  37
  38 if ( isset( $options['d'] ) ) {
  39         $d = $options['d'];
  40         if ( $d > 0 ) {
  41                 $wgDebugLogFile = '/dev/stdout';
  42         }
  43         if ( $d > 1 ) {
  44                 $lb = wfGetLB();
  45                 $serverCount = $lb->getServerCount();
  46                 for ( $i = 0; $i < $serverCount; $i++ ) {
  47                         $server = $lb->getServerInfo( $i );
  48                         $server['flags'] |= DBO_DEBUG;
  49                         $lb->setServerInfo( $i, $server );
  50                 }
  51         }
  52         if ( $d > 2 ) {
  53                 $wgDebugFunctionEntry = true;
  54         }
  55 }
  56
  57 $useReadline = function_exists( 'readline_add_history' )
  58         && Maintenance::posix_isatty( 0 /*STDIN*/ );
  59
  60 if ( $useReadline ) {
  61         $historyFile = isset( $_ENV['HOME'] ) ?
  62                 "{$_ENV['HOME']}/.mweval_history" : "$IP/maintenance/.mweval_history";
  63         readline_read_history( $historyFile );
  64 }
  65
  66 $e = null; // PHP exception
  67 while ( ( $line = Maintenance::readconsole() ) !== false ) {
  68         if ( $e && !preg_match( '/^(exit|die);?$/', $line ) ) {
  69                 // Internal state may be corrupted or fatals may occur later due
  70                 // to some object not being set. Don't drop out of eval in case
  71                 // lines were being pasted in (which would then get dumped to the shell).
  72                 // Instead, just absorb the remaning commands. Let "exit" through per DWIM.
  73                 echo "Exception was thrown before; please restart eval.php\n";
  74                 continue;
  75         }
  76         if ( $useReadline ) {
  77                 readline_add_history( $line );
  78                 readline_write_history( $historyFile );
  79         }
  80         try {
  81                 $val = eval( $line . ";" );
  82         } catch ( Exception $e ) {
  83                 echo "Caught exception " . get_class( $e ) .
  84                         ": {$e->getMessage()}\n" . $e->getTraceAsString() . "\n";
  85                 continue;
  86         }
  87         if ( wfIsHHVM() || is_null( $val ) ) {
  88                 echo "\n";
  89         } elseif ( is_string( $val ) || is_numeric( $val ) ) {
  90                 echo "$val\n";
  91         } else {
  92                 var_dump( $val );
  93         }
  94 }
  95
  96 print "\n";