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 = [ 'd' ];
  34
  35 require_once __DIR__ . "/commandLine.inc";
  36
  37 if ( isset( $options['d'] ) ) {
  38         $d = $options['d'];
  39         if ( $d > 0 ) {
  40                 $wgDebugLogFile = '/dev/stdout';
  41         }
  42         if ( $d > 1 ) {
  43                 $lb = wfGetLB();
  44                 $serverCount = $lb->getServerCount();
  45                 for ( $i = 0; $i < $serverCount; $i++ ) {
  46                         $server = $lb->getServerInfo( $i );
  47                         $server['flags'] |= DBO_DEBUG;
  48                         $lb->setServerInfo( $i, $server );
  49                 }
  50         }
  51 }
  52
  53 $__useReadline = function_exists( 'readline_add_history' )
  54         && Maintenance::posix_isatty( 0 /*STDIN*/ );
  55
  56 if ( $__useReadline ) {
  57         $__historyFile = isset( $_ENV['HOME'] ) ?
  58                 "{$_ENV['HOME']}/.mweval_history" : "$IP/maintenance/.mweval_history";
  59         readline_read_history( $__historyFile );
  60 }
  61
  62 $__e = null; // PHP exception
  63 while ( ( $__line = Maintenance::readconsole() ) !== false ) {
  64         if ( $__e && !preg_match( '/^(exit|die);?$/', $__line ) ) {
  65                 // Internal state may be corrupted or fatals may occur later due
  66                 // to some object not being set. Don't drop out of eval in case
  67                 // lines were being pasted in (which would then get dumped to the shell).
  68                 // Instead, just absorb the remaning commands. Let "exit" through per DWIM.
  69                 echo "Exception was thrown before; please restart eval.php\n";
  70                 continue;
  71         }
  72         if ( $__useReadline ) {
  73                 readline_add_history( $__line );
  74                 readline_write_history( $__historyFile );
  75         }
  76         try {
  77                 $__val = eval( $__line . ";" );
  78         } catch ( Exception $__e ) {
  79                 echo "Caught exception " . get_class( $__e ) .
  80                         ": {$__e->getMessage()}\n" . $__e->getTraceAsString() . "\n";
  81                 continue;
  82         }
  83         if ( wfIsHHVM() || is_null( $__val ) ) {
  84                 echo "\n";
  85         } elseif ( is_string( $__val ) || is_numeric( $__val ) ) {
  86                 echo "$__val\n";
  87         } else {
  88                 var_dump( $__val );
  89         }
  90 }
  91
  92 print "\n";