maintenance/generateJsonI18n.php

   1 <?php
   2
   3 /**
   4  * Convert a PHP messages file to a set of JSON messages files.
   5  *
   6  * Usage:
   7  *    php generateJsonI18n.php ExtensionName.i18n.php i18n/
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  * @ingroup Maintenance
  26  */
  27
  28 require_once __DIR__ . '/Maintenance.php';
  29
  30 /**
  31  * Maintenance script to generate JSON i18n files from a PHP i18n file.
  32  *
  33  * @ingroup Maintenance
  34  */
  35 class GenerateJsonI18n extends Maintenance {
  36         public function __construct() {
  37                 parent::__construct();
  38                 $this->addDescription( 'Build JSON messages files from a PHP messages file' );
  39
  40                 $this->addArg( 'phpfile', 'PHP file defining a $messages array', false );
  41                 $this->addArg( 'jsondir', 'Directory to write JSON files to', false );
  42                 $this->addOption( 'extension', 'Perform default conversion on an extension',
  43                         false, true );
  44                 $this->addOption( 'supplementary', 'Find supplementary i18n files in subdirs and convert those',
  45                         false, false );
  46         }
  47
  48         public function execute() {
  49                 global $IP;
  50
  51                 $phpfile = $this->getArg( 0 );
  52                 $jsondir = $this->getArg( 1 );
  53                 $extension = $this->getOption( 'extension' );
  54                 $convertSupplementaryI18nFiles = $this->hasOption( 'supplementary' );
  55
  56                 if ( $extension ) {
  57                         if ( $phpfile ) {
  58                                 $this->fatalError( "The phpfile is already specified, conflicts with --extension." );
  59                         }
  60                         $phpfile = "$IP/extensions/$extension/$extension.i18n.php";
  61                 }
  62
  63                 if ( !$phpfile ) {
  64                         $this->error( "I'm here for an argument!" );
  65                         $this->maybeHelp( true );
  66                         // dies.
  67                 }
  68
  69                 if ( $convertSupplementaryI18nFiles ) {
  70                         if ( is_readable( $phpfile ) ) {
  71                                 $this->transformI18nFile( $phpfile, $jsondir );
  72                         } else {
  73                                 // This is non-fatal because we might want to continue searching for
  74                                 // i18n files in subdirs even if the extension does not include a
  75                                 // primary i18n.php.
  76                                 $this->error( "Warning: no primary i18n file was found." );
  77                         }
  78                         $this->output( "Searching for supplementary i18n files...\n" );
  79                         $dir_iterator = new RecursiveDirectoryIterator( dirname( $phpfile ) );
  80                         $iterator = new RecursiveIteratorIterator(
  81                                 $dir_iterator, RecursiveIteratorIterator::LEAVES_ONLY );
  82                         foreach ( $iterator as $path => $fileObject ) {
  83                                 if ( fnmatch( "*.i18n.php", $fileObject->getFilename() ) ) {
  84                                         $this->output( "Converting $path.\n" );
  85                                         $this->transformI18nFile( $path );
  86                                 }
  87                         }
  88                 } else {
  89                         // Just convert the primary i18n file.
  90                         $this->transformI18nFile( $phpfile, $jsondir );
  91                 }
  92         }
  93
  94         public function transformI18nFile( $phpfile, $jsondir = null ) {
  95                 if ( !$jsondir ) {
  96                         // Assume the json directory should be in the same directory as the
  97                         // .i18n.php file.
  98                         $jsondir = dirname( $phpfile ) . "/i18n";
  99                 }
 100                 if ( !is_dir( $jsondir ) ) {
 101                         $this->output( "Creating directory $jsondir.\n" );
 102                         $success = mkdir( $jsondir );
 103                         if ( !$success ) {
 104                                 $this->fatalError( "Could not create directory $jsondir" );
 105                         }
 106                 }
 107
 108                 if ( !is_readable( $phpfile ) ) {
 109                         $this->fatalError( "Error reading $phpfile" );
 110                 }
 111                 $messages = null;
 112                 include $phpfile;
 113                 $phpfileContents = file_get_contents( $phpfile );
 114
 115                 if ( !isset( $messages ) ) {
 116                         $this->fatalError( "PHP file $phpfile does not define \$messages array" );
 117                 }
 118
 119                 if ( !$messages ) {
 120                         $this->fatalError( "PHP file $phpfile contains an empty \$messages array. " .
 121                                 "Maybe it was already converted?" );
 122                 }
 123
 124                 if ( !isset( $messages['en'] ) || !is_array( $messages['en'] ) ) {
 125                         $this->fatalError( "PHP file $phpfile does not set language codes" );
 126                 }
 127
 128                 foreach ( $messages as $langcode => $langmsgs ) {
 129                         $authors = $this->getAuthorsFromComment( $this->findCommentBefore(
 130                                 "\$messages['$langcode'] =",
 131                                 $phpfileContents
 132                         ) );
 133                         // Make sure the @metadata key is the first key in the output
 134                         $langmsgs = array_merge(
 135                                 [ '@metadata' => [ 'authors' => $authors ] ],
 136                                 $langmsgs
 137                         );
 138
 139                         $jsonfile = "$jsondir/$langcode.json";
 140                         $success = file_put_contents(
 141                                 $jsonfile,
 142                                 FormatJson::encode( $langmsgs, "\t", FormatJson::ALL_OK ) . "\n"
 143                         );
 144                         if ( $success === false ) {
 145                                 $this->fatalError( "FAILED to write $jsonfile" );
 146                         }
 147                         $this->output( "$jsonfile\n" );
 148                 }
 149
 150                 $this->output(
 151                         "All done. To complete the conversion, please do the following:\n" .
 152                         "* Add \$wgMessagesDirs['YourExtension'] = __DIR__ . '/i18n';\n" .
 153                         "* Remove \$wgExtensionMessagesFiles['YourExtension']\n" .
 154                         "* Delete the old PHP message file\n" .
 155                         "This script no longer generates backward compatibility shims! If you need\n" .
 156                         "compatibility with MediaWiki 1.22 and older, use the MediaWiki 1.23 version\n" .
 157                         "of this script instead, or create a shim manually.\n"
 158                 );
 159         }
 160
 161         /**
 162          * Find the documentation comment immediately before a given search string
 163          * @param string $needle String to search for
 164          * @param string $haystack String to search in
 165          * @return string Substring of $haystack starting at '/**' ending right before $needle, or empty
 166          */
 167         protected function findCommentBefore( $needle, $haystack ) {
 168                 $needlePos = strpos( $haystack, $needle );
 169                 if ( $needlePos === false ) {
 170                         return '';
 171                 }
 172                 // Need to pass a negative offset to strrpos() so it'll search backwards from the
 173                 // offset
 174                 $startPos = strrpos( $haystack, '/**', $needlePos - strlen( $haystack ) );
 175                 if ( $startPos === false ) {
 176                         return '';
 177                 }
 178
 179                 return substr( $haystack, $startPos, $needlePos - $startPos );
 180         }
 181
 182         /**
 183          * Get an array of author names from a documentation comment containing @author declarations.
 184          * @param string $comment Documentation comment
 185          * @return array Array of author names (strings)
 186          */
 187         protected function getAuthorsFromComment( $comment ) {
 188                 $matches = null;
 189                 preg_match_all( '/@author (.*?)$/m', $comment, $matches );
 190
 191                 return $matches && $matches[1] ? $matches[1] : [];
 192         }
 193 }
 194
 195 $maintClass = "GenerateJsonI18n";
 196 require_once RUN_MAINTENANCE_IF_MAIN;