maintenance/findDeprecated.php

   1 <?php
   2 /**
   3  * Maintenance script that recursively scans MediaWiki's PHP source tree
   4  * for deprecated functions and methods and pretty-prints the results.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Maintenance
  23  */
  24
  25 require_once __DIR__ . '/Maintenance.php';
  26 require_once __DIR__ . '/../vendor/autoload.php';
  27
  28 /**
  29  * A PHPParser node visitor that associates each node with its file name.
  30  */
  31 class FileAwareNodeVisitor extends PhpParser\NodeVisitorAbstract {
  32         private $currentFile = null;
  33
  34         public function enterNode( PhpParser\Node $node ) {
  35                 $retVal = parent::enterNode( $node );
  36                 $node->filename = $this->currentFile;
  37                 return $retVal;
  38         }
  39
  40         public function setCurrentFile( $filename ) {
  41                 $this->currentFile = $filename;
  42         }
  43
  44         public function getCurrentFile() {
  45                 return $this->currentFile;
  46         }
  47 }
  48
  49 /**
  50  * A PHPParser node visitor that finds deprecated functions and methods.
  51  */
  52 class DeprecatedInterfaceFinder extends FileAwareNodeVisitor {
  53
  54         private $currentClass = null;
  55
  56         private $foundNodes = [];
  57
  58         public function getFoundNodes() {
  59                 // Sort results by version, then by filename, then by name.
  60                 foreach ( $this->foundNodes as $version => &$nodes ) {
  61                         uasort( $nodes, function ( $a, $b ) {
  62                                 return ( $a['filename'] . $a['name'] ) < ( $b['filename'] . $b['name'] ) ? -1 : 1;
  63                         } );
  64                 }
  65                 ksort( $this->foundNodes );
  66                 return $this->foundNodes;
  67         }
  68
  69         /**
  70          * Check whether a function or method includes a call to wfDeprecated(),
  71          * indicating that it is a hard-deprecated interface.
  72          * @param PhpParser\Node $node
  73          * @return bool
  74          */
  75         public function isHardDeprecated( PhpParser\Node $node ) {
  76                 if ( !$node->stmts ) {
  77                         return false;
  78                 }
  79                 foreach ( $node->stmts as $stmt ) {
  80                         if (
  81                                 $stmt instanceof PhpParser\Node\Expr\FuncCall
  82                                 && $stmt->name->toString() === 'wfDeprecated'
  83                         ) {
  84                                 return true;
  85                         }
  86                         return false;
  87                 }
  88         }
  89
  90         public function enterNode( PhpParser\Node $node ) {
  91                 $retVal = parent::enterNode( $node );
  92
  93                 if ( $node instanceof PhpParser\Node\Stmt\ClassLike ) {
  94                         $this->currentClass = $node->name;
  95                 }
  96
  97                 if ( $node instanceof PhpParser\Node\FunctionLike ) {
  98                         $docComment = $node->getDocComment();
  99                         if ( !$docComment ) {
 100                                 return;
 101                         }
 102                         if ( !preg_match( '/@deprecated.*(\d+\.\d+)/', $docComment->getText(), $matches ) ) {
 103                                 return;
 104                         }
 105                         $version = $matches[1];
 106
 107                         if ( $node instanceof PhpParser\Node\Stmt\ClassMethod ) {
 108                                 $name = $this->currentClass . '::' . $node->name;
 109                         } else {
 110                                 $name = $node->name;
 111                         }
 112
 113                         $this->foundNodes[ $version ][] = [
 114                                 'filename' => $node->filename,
 115                                 'line'     => $node->getLine(),
 116                                 'name'     => $name,
 117                                 'hard'     => $this->isHardDeprecated( $node ),
 118                         ];
 119                 }
 120
 121                 return $retVal;
 122         }
 123 }
 124
 125 /**
 126  * Maintenance task that recursively scans MediaWiki PHP files for deprecated
 127  * functions and interfaces and produces a report.
 128  */
 129 class FindDeprecated extends Maintenance {
 130         public function __construct() {
 131                 parent::__construct();
 132                 $this->addDescription( 'Find deprecated interfaces' );
 133         }
 134
 135         public function getFiles() {
 136                 global $IP;
 137
 138                 $files = new RecursiveDirectoryIterator( $IP . '/includes' );
 139                 $files = new RecursiveIteratorIterator( $files );
 140                 $files = new RegexIterator( $files, '/\.php$/' );
 141                 return iterator_to_array( $files, false );
 142         }
 143
 144         public function execute() {
 145                 global $IP;
 146
 147                 $files = $this->getFiles();
 148                 $chunkSize = ceil( count( $files ) / 72 );
 149
 150                 $parser = ( new PhpParser\ParserFactory )->create( PhpParser\ParserFactory::PREFER_PHP7 );
 151                 $traverser = new PhpParser\NodeTraverser;
 152                 $finder = new DeprecatedInterfaceFinder;
 153                 $traverser->addVisitor( $finder );
 154
 155                 $fileCount = count( $files );
 156
 157                 for ( $i = 0; $i < $fileCount; $i++ ) {
 158                         $file = $files[$i];
 159                         $code = file_get_contents( $file );
 160
 161                         if ( strpos( $code, '@deprecated' ) === -1 ) {
 162                                 continue;
 163                         }
 164
 165                         $finder->setCurrentFile( substr( $file->getPathname(), strlen( $IP ) + 1 ) );
 166                         $nodes = $parser->parse( $code, [ 'throwOnError' => false ] );
 167                         $traverser->traverse( $nodes );
 168
 169                         if ( $i % $chunkSize === 0 ) {
 170                                 $percentDone = 100 * $i / $fileCount;
 171                                 fprintf( STDERR, "\r[%-72s] %d%%", str_repeat( '#', $i / $chunkSize ), $percentDone );
 172                         }
 173                 }
 174
 175                 fprintf( STDERR, "\r[%'#-72s] 100%%\n", '' );
 176
 177                 // Colorize output if STDOUT is an interactive terminal.
 178                 if ( posix_isatty( STDOUT ) ) {
 179                         $versionFmt = "\n* Deprecated since \033[37;1m%s\033[0m:\n";
 180                         $entryFmt = "  %s \033[33;1m%s\033[0m (%s:%d)\n";
 181                 } else {
 182                         $versionFmt = "\n* Deprecated since %s:\n";
 183                         $entryFmt = "  %s %s (%s:%d)\n";
 184                 }
 185
 186                 foreach ( $finder->getFoundNodes() as $version => $nodes ) {
 187                         printf( $versionFmt, $version );
 188                         foreach ( $nodes as $node ) {
 189                                 printf(
 190                                         $entryFmt,
 191                                         $node['hard'] ? '+' : '-',
 192                                         $node['name'],
 193                                         $node['filename'],
 194                                         $node['line']
 195                                 );
 196                         }
 197                 }
 198                 printf( "\nlegend:\n -: soft-deprecated\n +: hard-deprecated (via wfDeprecated())\n" );
 199         }
 200 }
 201
 202 $maintClass = 'FindDeprecated';
 203 require_once RUN_MAINTENANCE_IF_MAIN;