]> scripts.mit.edu Git - autoinstallsdev/mediawiki.git/blobdiff - includes/specials/SpecialVersion.php
MediaWiki 1.30.2
[autoinstallsdev/mediawiki.git] / includes / specials / SpecialVersion.php
index 7da6023ed8bd52e95b4b1745fc1d2913284f6da7..f176b407553fa2a5fec611058e05599871071311 100644 (file)
 <?php
+/**
+ * Implements Special:Version
+ *
+ * Copyright © 2005 Ævar Arnfjörð Bjarmason
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup SpecialPage
+ */
 
 /**
  * Give information about the version of MediaWiki, PHP, the DB and extensions
  *
  * @ingroup SpecialPage
- *
- * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
- * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
- * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  */
 class SpecialVersion extends SpecialPage {
-       private $firstExtOpened = true;
+       protected $firstExtOpened = false;
+
+       /**
+        * Stores the current rev id/SHA hash of MediaWiki core
+        */
+       protected $coreId = '';
 
-       static $viewvcUrls = array(
-               'svn+ssh://svn.wikimedia.org/svnroot/mediawiki' => 'http://svn.wikimedia.org/viewvc/mediawiki',
-               'http://svn.wikimedia.org/svnroot/mediawiki' => 'http://svn.wikimedia.org/viewvc/mediawiki',
-               # Doesn't work at the time of writing but maybe some day: 
-               'https://svn.wikimedia.org/viewvc/mediawiki' => 'http://svn.wikimedia.org/viewvc/mediawiki',
-       );
+       protected static $extensionTypes = false;
 
-       function __construct(){
+       public function __construct() {
                parent::__construct( 'Version' );
        }
 
        /**
         * main()
+        * @param string|null $par
         */
-       function execute( $par ) {
-               global $wgOut, $wgMessageCache, $wgSpecialVersionShowHooks, $wgContLang;
-               $wgMessageCache->loadAllMessages();
+       public function execute( $par ) {
+               global $IP, $wgExtensionCredits;
 
                $this->setHeaders();
                $this->outputHeader();
+               $out = $this->getOutput();
+               $out->allowClickjacking();
 
-               $wgOut->addHTML( Xml::openElement( 'div',
-                       array( 'dir' => $wgContLang->getDir() ) ) );
-               $text = 
-                       $this->MediaWikiCredits() .
-                       $this->softwareInformation() .
-                       $this->extensionCredits();
-               if ( $wgSpecialVersionShowHooks ) {
-                       $text .= $this->wgHooks();
-               }
-               $wgOut->addWikiText( $text );
-               $wgOut->addHTML( $this->IPInfo() );
-               $wgOut->addHTML( '</div>' );
-       }
+               // Explode the sub page information into useful bits
+               $parts = explode( '/', (string)$par );
+               $extNode = null;
+               if ( isset( $parts[1] ) ) {
+                       $extName = str_replace( '_', ' ', $parts[1] );
+                       // Find it!
+                       foreach ( $wgExtensionCredits as $group => $extensions ) {
+                               foreach ( $extensions as $ext ) {
+                                       if ( isset( $ext['name'] ) && ( $ext['name'] === $extName ) ) {
+                                               $extNode = &$ext;
+                                               break 2;
+                                       }
+                               }
+                       }
+                       if ( !$extNode ) {
+                               $out->setStatusCode( 404 );
+                       }
+               } else {
+                       $extName = 'MediaWiki';
+               }
 
-       /**#@+
-        * @private
-        */
+               // Now figure out what to do
+               switch ( strtolower( $parts[0] ) ) {
+                       case 'credits':
+                               $out->addModuleStyles( 'mediawiki.special.version' );
+
+                               $wikiText = '{{int:version-credits-not-found}}';
+                               if ( $extName === 'MediaWiki' ) {
+                                       $wikiText = file_get_contents( $IP . '/CREDITS' );
+                                       // Put the contributor list into columns
+                                       $wikiText = str_replace(
+                                               [ '<!-- BEGIN CONTRIBUTOR LIST -->', '<!-- END CONTRIBUTOR LIST -->' ],
+                                               [ '<div class="mw-version-credits">', '</div>' ],
+                                               $wikiText );
+                               } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
+                                       $file = $this->getExtAuthorsFileName( dirname( $extNode['path'] ) );
+                                       if ( $file ) {
+                                               $wikiText = file_get_contents( $file );
+                                               if ( substr( $file, -4 ) === '.txt' ) {
+                                                       $wikiText = Html::element(
+                                                               'pre',
+                                                               [
+                                                                       'lang' => 'en',
+                                                                       'dir' => 'ltr',
+                                                               ],
+                                                               $wikiText
+                                                       );
+                                               }
+                                       }
+                               }
+
+                               $out->setPageTitle( $this->msg( 'version-credits-title', $extName ) );
+                               $out->addWikiText( $wikiText );
+                               break;
+
+                       case 'license':
+                               $wikiText = '{{int:version-license-not-found}}';
+                               if ( $extName === 'MediaWiki' ) {
+                                       $wikiText = file_get_contents( $IP . '/COPYING' );
+                               } elseif ( ( $extNode !== null ) && isset( $extNode['path'] ) ) {
+                                       $file = $this->getExtLicenseFileName( dirname( $extNode['path'] ) );
+                                       if ( $file ) {
+                                               $wikiText = file_get_contents( $file );
+                                               $wikiText = Html::element(
+                                                       'pre',
+                                                       [
+                                                               'lang' => 'en',
+                                                               'dir' => 'ltr',
+                                                       ],
+                                                       $wikiText
+                                               );
+                                       }
+                               }
+
+                               $out->setPageTitle( $this->msg( 'version-license-title', $extName ) );
+                               $out->addWikiText( $wikiText );
+                               break;
+
+                       default:
+                               $out->addModuleStyles( 'mediawiki.special.version' );
+                               $out->addWikiText(
+                                       $this->getMediaWikiCredits() .
+                                       $this->softwareInformation() .
+                                       $this->getEntryPointInfo()
+                               );
+                               $out->addHTML(
+                                       $this->getSkinCredits() .
+                                       $this->getExtensionCredits() .
+                                       $this->getExternalLibraries() .
+                                       $this->getParserTags() .
+                                       $this->getParserFunctionHooks()
+                               );
+                               $out->addWikiText( $this->getWgHooks() );
+                               $out->addHTML( $this->IPInfo() );
+
+                               break;
+               }
+       }
 
        /**
-        * @return wiki text showing the license information
+        * Returns wiki text showing the license information.
+        *
+        * @return string
         */
-       static function MediaWikiCredits() {
-               global $wgContLang;
-
-               $ret = Xml::element( 'h2', array( 'id' => 'mw-version-license' ), wfMsg( 'version-license' ) );
+       private static function getMediaWikiCredits() {
+               $ret = Xml::element(
+                       'h2',
+                       [ 'id' => 'mw-version-license' ],
+                       wfMessage( 'version-license' )->text()
+               );
 
                // This text is always left-to-right.
-               $ret .= '<div dir="ltr">';
+               $ret .= '<div class="plainlinks">';
                $ret .= "__NOTOC__
-               This wiki is powered by '''[http://www.mediawiki.org/ MediaWiki]''',
-               copyright © 2001-2010 Magnus Manske, Brion Vibber, Lee Daniel Crocker,
-               Tim Starling, Erik Möller, Gabriel Wicke, Ævar Arnfjörð Bjarmason,
-               Niklas Laxström, Domas Mituzas, Rob Church, Yuri Astrakhan, Aryeh Gregor,
-               Aaron Schulz, Andrew Garrett, Raimond Spekking, Alexandre Emsenhuber,
-               Siebrand Mazeland, Chad Horohoe and others.
-
-               MediaWiki is free software; you can redistribute it and/or modify
-               it under the terms of the GNU General Public License as published by
-               the Free Software Foundation; either version 2 of the License, or
-               (at your option) any later version.
-
-               MediaWiki is distributed in the hope that it will be useful,
-               but WITHOUT ANY WARRANTY; without even the implied warranty of
-               MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-               GNU General Public License for more details.
-
-               You should have received [{{SERVER}}{{SCRIPTPATH}}/COPYING a copy of the GNU General Public License]
-               along with this program; if not, write to the Free Software
-               Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
-               or [http://www.gnu.org/licenses/old-licenses/gpl-2.0.html read it online].
-               ";
+               " . self::getCopyrightAndAuthorList() . "\n
+               " . wfMessage( 'version-license-info' )->text();
                $ret .= '</div>';
 
                return str_replace( "\t\t", '', $ret ) . "\n";
        }
 
        /**
-        * @return wiki text showing the third party software versions (apache, php, mysql).
+        * Get the "MediaWiki is copyright 2001-20xx by lots of cool guys" text
+        *
+        * @return string
         */
-       static function softwareInformation() {
-               $dbr = wfGetDB( DB_SLAVE );
+       public static function getCopyrightAndAuthorList() {
+               global $wgLang;
+
+               if ( defined( 'MEDIAWIKI_INSTALL' ) ) {
+                       $othersLink = '[https://www.mediawiki.org/wiki/Special:Version/Credits ' .
+                               wfMessage( 'version-poweredby-others' )->text() . ']';
+               } else {
+                       $othersLink = '[[Special:Version/Credits|' .
+                               wfMessage( 'version-poweredby-others' )->text() . ']]';
+               }
+
+               $translatorsLink = '[https://translatewiki.net/wiki/Translating:MediaWiki/Credits ' .
+                       wfMessage( 'version-poweredby-translators' )->text() . ']';
+
+               $authorList = [
+                       'Magnus Manske', 'Brion Vibber', 'Lee Daniel Crocker',
+                       'Tim Starling', 'Erik Möller', 'Gabriel Wicke', 'Ævar Arnfjörð Bjarmason',
+                       'Niklas Laxström', 'Domas Mituzas', 'Rob Church', 'Yuri Astrakhan',
+                       'Aryeh Gregor', 'Aaron Schulz', 'Andrew Garrett', 'Raimond Spekking',
+                       'Alexandre Emsenhuber', 'Siebrand Mazeland', 'Chad Horohoe',
+                       'Roan Kattouw', 'Trevor Parscal', 'Bryan Tong Minh', 'Sam Reed',
+                       'Victor Vasiliev', 'Rotem Liss', 'Platonides', 'Antoine Musso',
+                       'Timo Tijhof', 'Daniel Kinzler', 'Jeroen De Dauw', 'Brad Jorsch',
+                       'Bartosz Dziewoński', 'Ed Sanders', 'Moriel Schottlender',
+                       $othersLink, $translatorsLink
+               ];
+
+               return wfMessage( 'version-poweredby-credits', MWTimestamp::getLocalInstance()->format( 'Y' ),
+                       $wgLang->listToText( $authorList ) )->text();
+       }
+
+       /**
+        * Returns wiki text showing the third party software versions (apache, php, mysql).
+        *
+        * @return string
+        */
+       public static function softwareInformation() {
+               $dbr = wfGetDB( DB_REPLICA );
 
                // Put the software in an array of form 'name' => 'version'. All messages should
-               // be loaded here, so feel free to use wfMsg*() in the 'name'. Raw HTML or wikimarkup
-               // can be used
-               $software = array();
-               $software['[http://www.mediawiki.org/ MediaWiki]'] = self::getVersionLinked();
-               $software['[http://www.php.net/ PHP]'] = phpversion() . " (" . php_sapi_name() . ")";
-               $software[$dbr->getSoftwareLink()] = $dbr->getServerVersion();
-
-               // Allow a hook to add/remove items
-               wfRunHooks( 'SoftwareInfo', array( &$software ) );
-
-               $out = Xml::element( 'h2', array( 'id' => 'mw-version-software' ), wfMsg( 'version-software' ) ) .
-                          Xml::openElement( 'table', array( 'class' => 'wikitable', 'id' => 'sv-software' ) ) .
+               // be loaded here, so feel free to use wfMessage in the 'name'. Raw HTML or
+               // wikimarkup can be used.
+               $software = [];
+               $software['[https://www.mediawiki.org/ MediaWiki]'] = self::getVersionLinked();
+               if ( wfIsHHVM() ) {
+                       $software['[http://hhvm.com/ HHVM]'] = HHVM_VERSION . " (" . PHP_SAPI . ")";
+               } else {
+                       $software['[https://php.net/ PHP]'] = PHP_VERSION . " (" . PHP_SAPI . ")";
+               }
+               $software[$dbr->getSoftwareLink()] = $dbr->getServerInfo();
+
+               if ( IcuCollation::getICUVersion() ) {
+                       $software['[http://site.icu-project.org/ ICU]'] = IcuCollation::getICUVersion();
+               }
+
+               // Allow a hook to add/remove items.
+               Hooks::run( 'SoftwareInfo', [ &$software ] );
+
+               $out = Xml::element(
+                               'h2',
+                               [ 'id' => 'mw-version-software' ],
+                               wfMessage( 'version-software' )->text()
+                       ) .
+                               Xml::openElement( 'table', [ 'class' => 'wikitable plainlinks', 'id' => 'sv-software' ] ) .
                                "<tr>
-                                       <th>" . wfMsg( 'version-software-product' ) . "</th>
-                                       <th>" . wfMsg( 'version-software-version' ) . "</th>
+                                       <th>" . wfMessage( 'version-software-product' )->text() . "</th>
+                                       <th>" . wfMessage( 'version-software-version' )->text() . "</th>
                                </tr>\n";
-               foreach( $software as $name => $version ) {
+
+               foreach ( $software as $name => $version ) {
                        $out .= "<tr>
                                        <td>" . $name . "</td>
-                                       <td>" . $version . "</td>
+                                       <td dir=\"ltr\">" . $version . "</td>
                                </tr>\n";
-               }               
+               }
+
                return $out . Xml::closeElement( 'table' );
        }
 
        /**
-        * Return a string of the MediaWiki version with SVN revision if available
+        * Return a string of the MediaWiki version with Git revision if available.
         *
+        * @param string $flags
+        * @param Language|string|null $lang
         * @return mixed
         */
-       public static function getVersion( $flags = '' ) {
+       public static function getVersion( $flags = '', $lang = null ) {
                global $wgVersion, $IP;
-               wfProfileIn( __METHOD__ );
 
-               $info = self::getSvnInfo( $IP );
-               if ( !$info ) {
+               $gitInfo = self::getGitHeadSha1( $IP );
+               if ( !$gitInfo ) {
                        $version = $wgVersion;
-               } elseif( $flags === 'nodb' ) {
-                       $version = "$wgVersion (r{$info['checkout-rev']})";
+               } elseif ( $flags === 'nodb' ) {
+                       $shortSha1 = substr( $gitInfo, 0, 7 );
+                       $version = "$wgVersion ($shortSha1)";
                } else {
-                       $version = $wgVersion . ' ' .
-                               wfMsg( 
-                                       'version-svn-revision', 
-                                       isset( $info['directory-rev'] ) ? $info['directory-rev'] : '',
-                                       $info['checkout-rev']
-                               );
+                       $shortSha1 = substr( $gitInfo, 0, 7 );
+                       $msg = wfMessage( 'parentheses' );
+                       if ( $lang !== null ) {
+                               $msg->inLanguage( $lang );
+                       }
+                       $shortSha1 = $msg->params( $shortSha1 )->escaped();
+                       $version = "$wgVersion $shortSha1";
                }
 
-               wfProfileOut( __METHOD__ );
                return $version;
        }
-       
+
        /**
         * Return a wikitext-formatted string of the MediaWiki version with a link to
-        * the SVN revision if available
+        * the Git SHA1 of head if available.
+        * The fallback is just $wgVersion
         *
         * @return mixed
         */
        public static function getVersionLinked() {
-               global $wgVersion, $IP;
-               wfProfileIn( __METHOD__ );
-               $info = self::getSvnInfo( $IP );
-               if ( isset(  $info['checkout-rev'] ) ) {
-                       $linkText = wfMsg(
-                               'version-svn-revision',
-                               isset( $info['directory-rev'] ) ? $info['directory-rev'] : '',
-                               $info['checkout-rev']
-                       );
-                       if ( isset( $info['viewvc-url'] ) ) {
-                               $version = "$wgVersion [{$info['viewvc-url']} $linkText]";
-                       } else {
-                               $version = "$wgVersion $linkText";
-                       }
+               global $wgVersion;
+
+               $gitVersion = self::getVersionLinkedGit();
+               if ( $gitVersion ) {
+                       $v = $gitVersion;
                } else {
-                       $version = $wgVersion;
+                       $v = $wgVersion; // fallback
                }
-               wfProfileOut( __METHOD__ );
-               return $version;
+
+               return $v;
+       }
+
+       /**
+        * @return string
+        */
+       private static function getwgVersionLinked() {
+               global $wgVersion;
+               $versionUrl = "";
+               if ( Hooks::run( 'SpecialVersionVersionUrl', [ $wgVersion, &$versionUrl ] ) ) {
+                       $versionParts = [];
+                       preg_match( "/^(\d+\.\d+)/", $wgVersion, $versionParts );
+                       $versionUrl = "https://www.mediawiki.org/wiki/MediaWiki_{$versionParts[1]}";
+               }
+
+               return "[$versionUrl $wgVersion]";
        }
 
-       /** Generate wikitext showing extensions name, URL, author and description */
-       function extensionCredits() {
-               global $wgExtensionCredits, $wgExtensionFunctions, $wgParser, $wgSkinExtensionFunctions;
+       /**
+        * @since 1.22 Returns the HEAD date in addition to the sha1 and link
+        * @return bool|string Global wgVersion + HEAD sha1 stripped to the first 7 chars
+        *   with link and date, or false on failure
+        */
+       private static function getVersionLinkedGit() {
+               global $IP, $wgLang;
+
+               $gitInfo = new GitInfo( $IP );
+               $headSHA1 = $gitInfo->getHeadSHA1();
+               if ( !$headSHA1 ) {
+                       return false;
+               }
+
+               $shortSHA1 = '(' . substr( $headSHA1, 0, 7 ) . ')';
+
+               $gitHeadUrl = $gitInfo->getHeadViewUrl();
+               if ( $gitHeadUrl !== false ) {
+                       $shortSHA1 = "[$gitHeadUrl $shortSHA1]";
+               }
 
-               if ( ! count( $wgExtensionCredits ) && ! count( $wgExtensionFunctions ) && ! count( $wgSkinExtensionFunctions ) )
+               $gitHeadCommitDate = $gitInfo->getHeadCommitDate();
+               if ( $gitHeadCommitDate ) {
+                       $shortSHA1 .= Html::element( 'br' ) . $wgLang->timeanddate( $gitHeadCommitDate, true );
+               }
+
+               return self::getwgVersionLinked() . " $shortSHA1";
+       }
+
+       /**
+        * Returns an array with the base extension types.
+        * Type is stored as array key, the message as array value.
+        *
+        * TODO: ideally this would return all extension types.
+        *
+        * @since 1.17
+        *
+        * @return array
+        */
+       public static function getExtensionTypes() {
+               if ( self::$extensionTypes === false ) {
+                       self::$extensionTypes = [
+                               'specialpage' => wfMessage( 'version-specialpages' )->text(),
+                               'parserhook' => wfMessage( 'version-parserhooks' )->text(),
+                               'variable' => wfMessage( 'version-variables' )->text(),
+                               'media' => wfMessage( 'version-mediahandlers' )->text(),
+                               'antispam' => wfMessage( 'version-antispam' )->text(),
+                               'skin' => wfMessage( 'version-skins' )->text(),
+                               'api' => wfMessage( 'version-api' )->text(),
+                               'other' => wfMessage( 'version-other' )->text(),
+                       ];
+
+                       Hooks::run( 'ExtensionTypes', [ &self::$extensionTypes ] );
+               }
+
+               return self::$extensionTypes;
+       }
+
+       /**
+        * Returns the internationalized name for an extension type.
+        *
+        * @since 1.17
+        *
+        * @param string $type
+        *
+        * @return string
+        */
+       public static function getExtensionTypeName( $type ) {
+               $types = self::getExtensionTypes();
+
+               return isset( $types[$type] ) ? $types[$type] : $types['other'];
+       }
+
+       /**
+        * Generate wikitext showing the name, URL, author and description of each extension.
+        *
+        * @return string Wikitext
+        */
+       public function getExtensionCredits() {
+               global $wgExtensionCredits;
+
+               if (
+                       count( $wgExtensionCredits ) === 0 ||
+                       // Skins are displayed separately, see getSkinCredits()
+                       ( count( $wgExtensionCredits ) === 1 && isset( $wgExtensionCredits['skin'] ) )
+               ) {
                        return '';
+               }
 
-               $extensionTypes = array(
-                       'specialpage' => wfMsg( 'version-specialpages' ),
-                       'parserhook' => wfMsg( 'version-parserhooks' ),
-                       'variable' => wfMsg( 'version-variables' ),
-                       'media' => wfMsg( 'version-mediahandlers' ),
-                       'other' => wfMsg( 'version-other' ),
-               );
-               wfRunHooks( 'SpecialVersionExtensionTypes', array( &$this, &$extensionTypes ) );
+               $extensionTypes = self::getExtensionTypes();
 
-               $out = Xml::element( 'h2', array( 'id' => 'mw-version-ext' ), wfMsg( 'version-extensions' ) ) .
-                       Xml::openElement( 'table', array( 'class' => 'wikitable', 'id' => 'sv-ext' ) );
+               $out = Xml::element(
+                               'h2',
+                               [ 'id' => 'mw-version-ext' ],
+                               $this->msg( 'version-extensions' )->text()
+                       ) .
+                       Xml::openElement( 'table', [ 'class' => 'wikitable plainlinks', 'id' => 'sv-ext' ] );
 
-               foreach ( $extensionTypes as $type => $text ) {
-                       if ( isset ( $wgExtensionCredits[$type] ) && count ( $wgExtensionCredits[$type] ) ) {
-                               $out .= $this->openExtType( $text, 'credits-' . $type );
+               // Make sure the 'other' type is set to an array.
+               if ( !array_key_exists( 'other', $wgExtensionCredits ) ) {
+                       $wgExtensionCredits['other'] = [];
+               }
 
-                               usort( $wgExtensionCredits[$type], array( $this, 'compare' ) );
+               // Find all extensions that do not have a valid type and give them the type 'other'.
+               foreach ( $wgExtensionCredits as $type => $extensions ) {
+                       if ( !array_key_exists( $type, $extensionTypes ) ) {
+                               $wgExtensionCredits['other'] = array_merge( $wgExtensionCredits['other'], $extensions );
+                       }
+               }
 
-                               foreach ( $wgExtensionCredits[$type] as $extension ) {
-                                       $out .= $this->formatCredits( $extension );
-                               }
+               $this->firstExtOpened = false;
+               // Loop through the extension categories to display their extensions in the list.
+               foreach ( $extensionTypes as $type => $message ) {
+                       // Skins have a separate section
+                       if ( $type !== 'other' && $type !== 'skin' ) {
+                               $out .= $this->getExtensionCategory( $type, $message );
                        }
                }
 
-               if ( count( $wgExtensionFunctions ) ) {
-                       $out .= $this->openExtType( wfMsg( 'version-extension-functions' ), 'extension-functions' );
-                       $out .= '<tr><td colspan="4">' . $this->listToText( $wgExtensionFunctions ) . "</td></tr>\n";
+               // We want the 'other' type to be last in the list.
+               $out .= $this->getExtensionCategory( 'other', $extensionTypes['other'] );
+
+               $out .= Xml::closeElement( 'table' );
+
+               return $out;
+       }
+
+       /**
+        * Generate wikitext showing the name, URL, author and description of each skin.
+        *
+        * @return string Wikitext
+        */
+       public function getSkinCredits() {
+               global $wgExtensionCredits;
+               if ( !isset( $wgExtensionCredits['skin'] ) || count( $wgExtensionCredits['skin'] ) === 0 ) {
+                       return '';
                }
 
-               if ( $cnt = count( $tags = $wgParser->getTags() ) ) {
-                       for ( $i = 0; $i < $cnt; ++$i )
-                               $tags[$i] = "&lt;{$tags[$i]}&gt;";
-                       $out .= $this->openExtType( wfMsg( 'version-parser-extensiontags' ), 'parser-tags' );
-                       $out .= '<tr><td colspan="4">' . $this->listToText( $tags ). "</td></tr>\n";
+               $out = Xml::element(
+                               'h2',
+                               [ 'id' => 'mw-version-skin' ],
+                               $this->msg( 'version-skins' )->text()
+                       ) .
+                       Xml::openElement( 'table', [ 'class' => 'wikitable plainlinks', 'id' => 'sv-skin' ] );
+
+               $this->firstExtOpened = false;
+               $out .= $this->getExtensionCategory( 'skin', null );
+
+               $out .= Xml::closeElement( 'table' );
+
+               return $out;
+       }
+
+       /**
+        * Generate an HTML table for external libraries that are installed
+        *
+        * @return string
+        */
+       protected function getExternalLibraries() {
+               global $IP;
+               $path = "$IP/vendor/composer/installed.json";
+               if ( !file_exists( $path ) ) {
+                       return '';
                }
 
-               if( $cnt = count( $fhooks = $wgParser->getFunctionHooks() ) ) {
-                       $out .= $this->openExtType( wfMsg( 'version-parser-function-hooks' ), 'parser-function-hooks' );
-                       $out .= '<tr><td colspan="4">' . $this->listToText( $fhooks ) . "</td></tr>\n";
+               $installed = new ComposerInstalled( $path );
+               $out = Html::element(
+                       'h2',
+                       [ 'id' => 'mw-version-libraries' ],
+                       $this->msg( 'version-libraries' )->text()
+               );
+               $out .= Html::openElement(
+                       'table',
+                       [ 'class' => 'wikitable plainlinks', 'id' => 'sv-libraries' ]
+               );
+               $out .= Html::openElement( 'tr' )
+                       . Html::element( 'th', [], $this->msg( 'version-libraries-library' )->text() )
+                       . Html::element( 'th', [], $this->msg( 'version-libraries-version' )->text() )
+                       . Html::element( 'th', [], $this->msg( 'version-libraries-license' )->text() )
+                       . Html::element( 'th', [], $this->msg( 'version-libraries-description' )->text() )
+                       . Html::element( 'th', [], $this->msg( 'version-libraries-authors' )->text() )
+                       . Html::closeElement( 'tr' );
+
+               foreach ( $installed->getInstalledDependencies() as $name => $info ) {
+                       if ( strpos( $info['type'], 'mediawiki-' ) === 0 ) {
+                               // Skip any extensions or skins since they'll be listed
+                               // in their proper section
+                               continue;
+                       }
+                       $authors = array_map( function ( $arr ) {
+                               // If a homepage is set, link to it
+                               if ( isset( $arr['homepage'] ) ) {
+                                       return "[{$arr['homepage']} {$arr['name']}]";
+                               }
+                               return $arr['name'];
+                       }, $info['authors'] );
+                       $authors = $this->listAuthors( $authors, false, "$IP/vendor/$name" );
+
+                       // We can safely assume that the libraries' names and descriptions
+                       // are written in English and aren't going to be translated,
+                       // so set appropriate lang and dir attributes
+                       $out .= Html::openElement( 'tr' )
+                               . Html::rawElement(
+                                       'td',
+                                       [],
+                                       Linker::makeExternalLink(
+                                               "https://packagist.org/packages/$name", $name,
+                                               true, '',
+                                               [ 'class' => 'mw-version-library-name' ]
+                                       )
+                               )
+                               . Html::element( 'td', [ 'dir' => 'auto' ], $info['version'] )
+                               . Html::element( 'td', [ 'dir' => 'auto' ], $this->listToText( $info['licenses'] ) )
+                               . Html::element( 'td', [ 'lang' => 'en', 'dir' => 'ltr' ], $info['description'] )
+                               . Html::rawElement( 'td', [], $authors )
+                               . Html::closeElement( 'tr' );
                }
+               $out .= Html::closeElement( 'table' );
+
+               return $out;
+       }
 
-               if ( count( $wgSkinExtensionFunctions ) ) {
-                       $out .= $this->openExtType( wfMsg( 'version-skin-extension-functions' ), 'skin-extension-functions' );
-                       $out .= '<tr><td colspan="4">' . $this->listToText( $wgSkinExtensionFunctions ) . "</td></tr>\n";
+       /**
+        * Obtains a list of installed parser tags and the associated H2 header
+        *
+        * @return string HTML output
+        */
+       protected function getParserTags() {
+               global $wgParser;
+
+               $tags = $wgParser->getTags();
+
+               if ( count( $tags ) ) {
+                       $out = Html::rawElement(
+                               'h2',
+                               [
+                                       'class' => 'mw-headline plainlinks',
+                                       'id' => 'mw-version-parser-extensiontags',
+                               ],
+                               Linker::makeExternalLink(
+                                       'https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Tag_extensions',
+                                       $this->msg( 'version-parser-extensiontags' )->parse(),
+                                       false /* msg()->parse() already escapes */
+                               )
+                       );
+
+                       array_walk( $tags, function ( &$value ) {
+                               // Bidirectional isolation improves readability in RTL wikis
+                               $value = Html::element(
+                                       'bdi',
+                                       // Prevent < and > from slipping to another line
+                                       [
+                                               'style' => 'white-space: nowrap;',
+                                       ],
+                                       "<$value>"
+                               );
+                       } );
+
+                       $out .= $this->listToText( $tags );
+               } else {
+                       $out = '';
                }
-               $out .= Xml::closeElement( 'table' );
+
                return $out;
        }
 
-       /** Callback to sort extensions by type */
-       function compare( $a, $b ) {
-               global $wgLang;
-               if( $a['name'] === $b['name'] ) {
+       /**
+        * Obtains a list of installed parser function hooks and the associated H2 header
+        *
+        * @return string HTML output
+        */
+       protected function getParserFunctionHooks() {
+               global $wgParser;
+
+               $fhooks = $wgParser->getFunctionHooks();
+               if ( count( $fhooks ) ) {
+                       $out = Html::rawElement(
+                               'h2',
+                               [
+                                       'class' => 'mw-headline plainlinks',
+                                       'id' => 'mw-version-parser-function-hooks',
+                               ],
+                               Linker::makeExternalLink(
+                                       'https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Parser_functions',
+                                       $this->msg( 'version-parser-function-hooks' )->parse(),
+                                       false /* msg()->parse() already escapes */
+                               )
+                       );
+
+                       $out .= $this->listToText( $fhooks );
+               } else {
+                       $out = '';
+               }
+
+               return $out;
+       }
+
+       /**
+        * Creates and returns the HTML for a single extension category.
+        *
+        * @since 1.17
+        *
+        * @param string $type
+        * @param string $message
+        *
+        * @return string
+        */
+       protected function getExtensionCategory( $type, $message ) {
+               global $wgExtensionCredits;
+
+               $out = '';
+
+               if ( array_key_exists( $type, $wgExtensionCredits ) && count( $wgExtensionCredits[$type] ) > 0 ) {
+                       $out .= $this->openExtType( $message, 'credits-' . $type );
+
+                       usort( $wgExtensionCredits[$type], [ $this, 'compare' ] );
+
+                       foreach ( $wgExtensionCredits[$type] as $extension ) {
+                               $out .= $this->getCreditsForExtension( $type, $extension );
+                       }
+               }
+
+               return $out;
+       }
+
+       /**
+        * Callback to sort extensions by type.
+        * @param array $a
+        * @param array $b
+        * @return int
+        */
+       public function compare( $a, $b ) {
+               if ( $a['name'] === $b['name'] ) {
                        return 0;
                } else {
-                       return $wgLang->lc( $a['name'] ) > $wgLang->lc( $b['name'] )
+                       return $this->getLanguage()->lc( $a['name'] ) > $this->getLanguage()->lc( $b['name'] )
                                ? 1
                                : -1;
                }
        }
 
-       function formatCredits( $extension ) {
-               $name = isset( $extension['name'] ) ? $extension['name'] : '[no name]';
-               if ( isset( $extension['path'] ) ) {
-                       $svnInfo = self::getSvnInfo( dirname($extension['path']) );
-                       $directoryRev = isset( $svnInfo['directory-rev'] ) ? $svnInfo['directory-rev'] : null;
-                       $checkoutRev = isset( $svnInfo['checkout-rev'] ) ? $svnInfo['checkout-rev'] : null;
-                       $viewvcUrl = isset( $svnInfo['viewvc-url'] ) ? $svnInfo['viewvc-url'] : null;
+       /**
+        * Creates and formats a version line for a single extension.
+        *
+        * Information for five columns will be created. Parameters required in the
+        * $extension array for part rendering are indicated in ()
+        *  - The name of (name), and URL link to (url), the extension
+        *  - Official version number (version) and if available version control system
+        *    revision (path), link, and date
+        *  - If available the short name of the license (license-name) and a link
+        *    to ((LICENSE)|(COPYING))(\.txt)? if it exists.
+        *  - Description of extension (descriptionmsg or description)
+        *  - List of authors (author) and link to a ((AUTHORS)|(CREDITS))(\.txt)? file if it exists
+        *
+        * @param string $type Category name of the extension
+        * @param array $extension
+        *
+        * @return string Raw HTML
+        */
+       public function getCreditsForExtension( $type, array $extension ) {
+               $out = $this->getOutput();
+
+               // We must obtain the information for all the bits and pieces!
+               // ... such as extension names and links
+               if ( isset( $extension['namemsg'] ) ) {
+                       // Localized name of extension
+                       $extensionName = $this->msg( $extension['namemsg'] )->text();
+               } elseif ( isset( $extension['name'] ) ) {
+                       // Non localized version
+                       $extensionName = $extension['name'];
                } else {
-                       $directoryRev = null;
-                       $checkoutRev = null;
-                       $viewvcUrl = null;
+                       $extensionName = $this->msg( 'version-no-ext-name' )->text();
                }
 
-               # Make main link (or just the name if there is no URL)
                if ( isset( $extension['url'] ) ) {
-                       $mainLink = "[{$extension['url']} $name]";
+                       $extensionNameLink = Linker::makeExternalLink(
+                               $extension['url'],
+                               $extensionName,
+                               true,
+                               '',
+                               [ 'class' => 'mw-version-ext-name' ]
+                       );
                } else {
-                       $mainLink = $name;
+                       $extensionNameLink = $extensionName;
                }
+
+               // ... and the version information
+               // If the extension path is set we will check that directory for GIT
+               // metadata in an attempt to extract date and vcs commit metadata.
+               $canonicalVersion = '&ndash;';
+               $extensionPath = null;
+               $vcsVersion = null;
+               $vcsLink = null;
+               $vcsDate = null;
+
                if ( isset( $extension['version'] ) ) {
-                       $versionText = '<span class="mw-version-ext-version">' . 
-                               wfMsg( 'version-version', $extension['version'] ) . 
-                               '</span>';
-               } else {
-                       $versionText = '';
+                       $canonicalVersion = $out->parseInline( $extension['version'] );
                }
 
-               # Make subversion text/link
-               if ( $checkoutRev ) {
-                       $svnText = wfMsg( 'version-svn-revision', $directoryRev, $checkoutRev );
-                       $svnText = isset( $viewvcUrl ) ? "[$viewvcUrl $svnText]" : $svnText;
-               } else {
-                       $svnText = false;
+               if ( isset( $extension['path'] ) ) {
+                       global $IP;
+                       $extensionPath = dirname( $extension['path'] );
+                       if ( $this->coreId == '' ) {
+                               wfDebug( 'Looking up core head id' );
+                               $coreHeadSHA1 = self::getGitHeadSha1( $IP );
+                               if ( $coreHeadSHA1 ) {
+                                       $this->coreId = $coreHeadSHA1;
+                               }
+                       }
+                       $cache = wfGetCache( CACHE_ANYTHING );
+                       $memcKey = $cache->makeKey(
+                               'specialversion-ext-version-text', $extension['path'], $this->coreId
+                       );
+                       list( $vcsVersion, $vcsLink, $vcsDate ) = $cache->get( $memcKey );
+
+                       if ( !$vcsVersion ) {
+                               wfDebug( "Getting VCS info for extension {$extension['name']}" );
+                               $gitInfo = new GitInfo( $extensionPath );
+                               $vcsVersion = $gitInfo->getHeadSHA1();
+                               if ( $vcsVersion !== false ) {
+                                       $vcsVersion = substr( $vcsVersion, 0, 7 );
+                                       $vcsLink = $gitInfo->getHeadViewUrl();
+                                       $vcsDate = $gitInfo->getHeadCommitDate();
+                               }
+                               $cache->set( $memcKey, [ $vcsVersion, $vcsLink, $vcsDate ], 60 * 60 * 24 );
+                       } else {
+                               wfDebug( "Pulled VCS info for extension {$extension['name']} from cache" );
+                       }
                }
 
-               # Make description text
-               $description = isset ( $extension['description'] ) ? $extension['description'] : '';
-               if( isset ( $extension['descriptionmsg'] ) ) {
-                       # Look for a localized description
+               $versionString = Html::rawElement(
+                       'span',
+                       [ 'class' => 'mw-version-ext-version' ],
+                       $canonicalVersion
+               );
+
+               if ( $vcsVersion ) {
+                       if ( $vcsLink ) {
+                               $vcsVerString = Linker::makeExternalLink(
+                                       $vcsLink,
+                                       $this->msg( 'version-version', $vcsVersion ),
+                                       true,
+                                       '',
+                                       [ 'class' => 'mw-version-ext-vcs-version' ]
+                               );
+                       } else {
+                               $vcsVerString = Html::element( 'span',
+                                       [ 'class' => 'mw-version-ext-vcs-version' ],
+                                       "({$vcsVersion})"
+                               );
+                       }
+                       $versionString .= " {$vcsVerString}";
+
+                       if ( $vcsDate ) {
+                               $vcsTimeString = Html::element( 'span',
+                                       [ 'class' => 'mw-version-ext-vcs-timestamp' ],
+                                       $this->getLanguage()->timeanddate( $vcsDate, true )
+                               );
+                               $versionString .= " {$vcsTimeString}";
+                       }
+                       $versionString = Html::rawElement( 'span',
+                               [ 'class' => 'mw-version-ext-meta-version' ],
+                               $versionString
+                       );
+               }
+
+               // ... and license information; if a license file exists we
+               // will link to it
+               $licenseLink = '';
+               if ( isset( $extension['name'] ) ) {
+                       $licenseName = null;
+                       if ( isset( $extension['license-name'] ) ) {
+                               $licenseName = new HtmlArmor( $out->parseInline( $extension['license-name'] ) );
+                       } elseif ( $this->getExtLicenseFileName( $extensionPath ) ) {
+                               $licenseName = $this->msg( 'version-ext-license' )->text();
+                       }
+                       if ( $licenseName !== null ) {
+                               $licenseLink = $this->getLinkRenderer()->makeLink(
+                                       $this->getPageTitle( 'License/' . $extension['name'] ),
+                                       $licenseName,
+                                       [
+                                               'class' => 'mw-version-ext-license',
+                                               'dir' => 'auto',
+                                       ]
+                               );
+                       }
+               }
+
+               // ... and generate the description; which can be a parameterized l10n message
+               // in the form array( <msgname>, <parameter>, <parameter>... ) or just a straight
+               // up string
+               if ( isset( $extension['descriptionmsg'] ) ) {
+                       // Localized description of extension
                        $descriptionMsg = $extension['descriptionmsg'];
-                       if( is_array( $descriptionMsg ) ) {
+
+                       if ( is_array( $descriptionMsg ) ) {
                                $descriptionMsgKey = $descriptionMsg[0]; // Get the message key
                                array_shift( $descriptionMsg ); // Shift out the message key to get the parameters only
                                array_map( "htmlspecialchars", $descriptionMsg ); // For sanity
-                               $msg = wfMsg( $descriptionMsgKey, $descriptionMsg );
+                               $description = $this->msg( $descriptionMsgKey, $descriptionMsg )->text();
                        } else {
-                               $msg = wfMsg( $descriptionMsg );
+                               $description = $this->msg( $descriptionMsg )->text();
                        }
-                       if ( !wfEmptyMsg( $descriptionMsg, $msg ) && $msg != '' ) {
-                               $description = $msg;
-                       }
+               } elseif ( isset( $extension['description'] ) ) {
+                       // Non localized version
+                       $description = $extension['description'];
+               } else {
+                       $description = '';
                }
+               $description = $out->parseInline( $description );
 
-               if ( $svnText !== false ) {
-                       $extNameVer = "<tr>
-                               <td><em>$mainLink $versionText</em></td>
-                               <td><em>$svnText</em></td>";
-               } else {
-                       $extNameVer = "<tr>
-                               <td colspan=\"2\"><em>$mainLink $versionText</em></td>";
-               }
-               $author = isset ( $extension['author'] ) ? $extension['author'] : array();
-               $extDescAuthor = "<td>$description</td>
-                       <td>" . $this->listToText( (array)$author, false ) . "</td>
-                       </tr>\n";
-               return $extNameVer . $extDescAuthor;
+               // ... now get the authors for this extension
+               $authors = isset( $extension['author'] ) ? $extension['author'] : [];
+               $authors = $this->listAuthors( $authors, $extension['name'], $extensionPath );
+
+               // Finally! Create the table
+               $html = Html::openElement( 'tr', [
+                               'class' => 'mw-version-ext',
+                               'id' => Sanitizer::escapeIdForAttribute( 'mw-version-ext-' . $type . '-' . $extension['name'] )
+                       ]
+               );
+
+               $html .= Html::rawElement( 'td', [], $extensionNameLink );
+               $html .= Html::rawElement( 'td', [], $versionString );
+               $html .= Html::rawElement( 'td', [], $licenseLink );
+               $html .= Html::rawElement( 'td', [ 'class' => 'mw-version-ext-description' ], $description );
+               $html .= Html::rawElement( 'td', [ 'class' => 'mw-version-ext-authors' ], $authors );
+
+               $html .= Html::closeElement( 'tr' );
+
+               return $html;
        }
 
        /**
-        * @return string
+        * Generate wikitext showing hooks in $wgHooks.
+        *
+        * @return string Wikitext
         */
-       function wgHooks() {
-               global $wgHooks;
+       private function getWgHooks() {
+               global $wgSpecialVersionShowHooks, $wgHooks;
 
-               if ( count( $wgHooks ) ) {
+               if ( $wgSpecialVersionShowHooks && count( $wgHooks ) ) {
                        $myWgHooks = $wgHooks;
                        ksort( $myWgHooks );
 
-                       $ret = Xml::element( 'h2', array( 'id' => 'mw-version-hooks' ), wfMsg( 'version-hooks' ) ) .
-                               Xml::openElement( 'table', array( 'class' => 'wikitable', 'id' => 'sv-hooks' ) ) .
-                               "<tr>
-                                       <th>" . wfMsg( 'version-hook-name' ) . "</th>
-                                       <th>" . wfMsg( 'version-hook-subscribedby' ) . "</th>
-                               </tr>\n";
+                       $ret = [];
+                       $ret[] = '== {{int:version-hooks}} ==';
+                       $ret[] = Html::openElement( 'table', [ 'class' => 'wikitable', 'id' => 'sv-hooks' ] );
+                       $ret[] = Html::openElement( 'tr' );
+                       $ret[] = Html::element( 'th', [], $this->msg( 'version-hook-name' )->text() );
+                       $ret[] = Html::element( 'th', [], $this->msg( 'version-hook-subscribedby' )->text() );
+                       $ret[] = Html::closeElement( 'tr' );
+
+                       foreach ( $myWgHooks as $hook => $hooks ) {
+                               $ret[] = Html::openElement( 'tr' );
+                               $ret[] = Html::element( 'td', [], $hook );
+                               $ret[] = Html::element( 'td', [], $this->listToText( $hooks ) );
+                               $ret[] = Html::closeElement( 'tr' );
+                       }
 
-                       foreach ( $myWgHooks as $hook => $hooks )
-                               $ret .= "<tr>
-                                               <td>$hook</td>
-                                               <td>" . $this->listToText( $hooks ) . "</td>
-                                       </tr>\n";
+                       $ret[] = Html::closeElement( 'table' );
 
-                       $ret .= Xml::closeElement( 'table' );
-                       return $ret;
-               } else
+                       return implode( "\n", $ret );
+               } else {
                        return '';
+               }
        }
 
-       private function openExtType( $text, $name = null ) {
-               $opt = array( 'colspan' => 4 );
+       private function openExtType( $text = null, $name = null ) {
                $out = '';
 
-               if( !$this->firstExtOpened ) {
+               $opt = [ 'colspan' => 5 ];
+               if ( $this->firstExtOpened ) {
                        // Insert a spacing line
-                       $out .= '<tr class="sv-space">' . Xml::element( 'td', $opt ) . "</tr>\n";
+                       $out .= Html::rawElement( 'tr', [ 'class' => 'sv-space' ],
+                               Html::element( 'td', $opt )
+                       );
                }
-               $this->firstExtOpened = false;
+               $this->firstExtOpened = true;
 
-               if( $name )
+               if ( $name ) {
                        $opt['id'] = "sv-$name";
+               }
+
+               if ( $text !== null ) {
+                       $out .= Html::rawElement( 'tr', [],
+                               Html::element( 'th', $opt, $text )
+                       );
+               }
+
+               $firstHeadingMsg = ( $name === 'credits-skin' )
+                       ? 'version-skin-colheader-name'
+                       : 'version-ext-colheader-name';
+               $out .= Html::openElement( 'tr' );
+               $out .= Html::element( 'th', [ 'class' => 'mw-version-ext-col-label' ],
+                       $this->msg( $firstHeadingMsg )->text() );
+               $out .= Html::element( 'th', [ 'class' => 'mw-version-ext-col-label' ],
+                       $this->msg( 'version-ext-colheader-version' )->text() );
+               $out .= Html::element( 'th', [ 'class' => 'mw-version-ext-col-label' ],
+                       $this->msg( 'version-ext-colheader-license' )->text() );
+               $out .= Html::element( 'th', [ 'class' => 'mw-version-ext-col-label' ],
+                       $this->msg( 'version-ext-colheader-description' )->text() );
+               $out .= Html::element( 'th', [ 'class' => 'mw-version-ext-col-label' ],
+                       $this->msg( 'version-ext-colheader-credits' )->text() );
+               $out .= Html::closeElement( 'tr' );
 
-               $out .= "<tr>" . Xml::element( 'th', $opt, $text ) . "</tr>\n";
                return $out;
        }
 
        /**
-        * @return string
+        * Get information about client's IP address.
+        *
+        * @return string HTML fragment
         */
-       function IPInfo() {
-               $ip =  str_replace( '--', ' - ', htmlspecialchars( wfGetIP() ) );
-               return "<!-- visited from $ip -->\n" .
-                       "<span style='display:none'>visited from $ip</span>";
+       private function IPInfo() {
+               $ip = str_replace( '--', ' - ', htmlspecialchars( $this->getRequest()->getIP() ) );
+
+               return "<!-- visited from $ip -->\n<span style='display:none'>visited from $ip</span>";
        }
 
        /**
-        * @param array $list
-        * @param bool $sort
-        * @return string
+        * Return a formatted unsorted list of authors
+        *
+        * 'And Others'
+        *   If an item in the $authors array is '...' it is assumed to indicate an
+        *   'and others' string which will then be linked to an ((AUTHORS)|(CREDITS))(\.txt)?
+        *   file if it exists in $dir.
+        *
+        *   Similarly an entry ending with ' ...]' is assumed to be a link to an
+        *   'and others' page.
+        *
+        *   If no '...' string variant is found, but an authors file is found an
+        *   'and others' will be added to the end of the credits.
+        *
+        * @param string|array $authors
+        * @param string|bool $extName Name of the extension for link creation,
+        *   false if no links should be created
+        * @param string $extDir Path to the extension root directory
+        *
+        * @return string HTML fragment
         */
-       function listToText( $list, $sort = true ) {
-               $cnt = count( $list );
+       public function listAuthors( $authors, $extName, $extDir ) {
+               $hasOthers = false;
+               $linkRenderer = $this->getLinkRenderer();
 
-               if ( $cnt == 1 ) {
-                       // Enforce always returning a string
-                       return (string)self::arrayToString( $list[0] );
-               } elseif ( $cnt == 0 ) {
-                       return '';
-               } else {
-                       global $wgLang;
-                       if ( $sort ) {
-                               sort( $list );
+               $list = [];
+               foreach ( (array)$authors as $item ) {
+                       if ( $item == '...' ) {
+                               $hasOthers = true;
+
+                               if ( $extName && $this->getExtAuthorsFileName( $extDir ) ) {
+                                       $text = $linkRenderer->makeLink(
+                                               $this->getPageTitle( "Credits/$extName" ),
+                                               $this->msg( 'version-poweredby-others' )->text()
+                                       );
+                               } else {
+                                       $text = $this->msg( 'version-poweredby-others' )->escaped();
+                               }
+                               $list[] = $text;
+                       } elseif ( substr( $item, -5 ) == ' ...]' ) {
+                               $hasOthers = true;
+                               $list[] = $this->getOutput()->parseInline(
+                                       substr( $item, 0, -4 ) . $this->msg( 'version-poweredby-others' )->text() . "]"
+                               );
+                       } else {
+                               $list[] = $this->getOutput()->parseInline( $item );
                        }
-                       return $wgLang->listToText( array_map( array( __CLASS__, 'arrayToString' ), $list ) );
                }
-       }
 
-       /**
-        * @param mixed $list Will convert an array to string if given and return
-        *                    the paramater unaltered otherwise
-        * @return mixed
-        */
-       static function arrayToString( $list ) {
-               if( is_array( $list ) && count( $list ) == 1 )
-                       $list = $list[0];
-               if( is_object( $list ) ) {
-                       $class = get_class( $list );
-                       return "($class)";
-               } elseif ( !is_array( $list ) ) {
-                       return $list;
-               } else {
-                       if( is_object( $list[0] ) )
-                               $class = get_class( $list[0] );
-                       else 
-                               $class = $list[0];
-                       return "($class, {$list[1]})";
+               if ( $extName && !$hasOthers && $this->getExtAuthorsFileName( $extDir ) ) {
+                       $list[] = $text = $linkRenderer->makeLink(
+                               $this->getPageTitle( "Credits/$extName" ),
+                               $this->msg( 'version-poweredby-others' )->text()
+                       );
                }
+
+               return $this->listToText( $list, false );
        }
 
        /**
-        * Get an associative array of information about a given path, from its .svn 
-        * subdirectory. Returns false on error, such as if the directory was not 
-        * checked out with subversion.
-        *
-        * Returned keys are:
-        *    Required:
-        *        checkout-rev          The revision which was checked out
-        *    Optional:
-        *        directory-rev         The revision when the directory was last modified
-        *        url                   The subversion URL of the directory
-        *        repo-url              The base URL of the repository
-        *        viewvc-url            A ViewVC URL pointing to the checked-out revision
+        * Obtains the full path of an extensions authors or credits file if
+        * one exists.
+        *
+        * @param string $extDir Path to the extensions root directory
+        *
+        * @since 1.23
+        *
+        * @return bool|string False if no such file exists, otherwise returns
+        * a path to it.
         */
-       public static function getSvnInfo( $dir ) {
-               // http://svnbook.red-bean.com/nightly/en/svn.developer.insidewc.html
-               $entries = $dir . '/.svn/entries';
-
-               if( !file_exists( $entries ) ) {
+       public static function getExtAuthorsFileName( $extDir ) {
+               if ( !$extDir ) {
                        return false;
                }
 
-               $lines = file( $entries );
-               if ( !count( $lines ) ) {
-                       return false;
+               foreach ( scandir( $extDir ) as $file ) {
+                       $fullPath = $extDir . DIRECTORY_SEPARATOR . $file;
+                       if ( preg_match( '/^((AUTHORS)|(CREDITS))(\.txt|\.wiki|\.mediawiki)?$/', $file ) &&
+                               is_readable( $fullPath ) &&
+                               is_file( $fullPath )
+                       ) {
+                               return $fullPath;
+                       }
                }
 
-               // check if file is xml (subversion release <= 1.3) or not (subversion release = 1.4)
-               if( preg_match( '/^<\?xml/', $lines[0] ) ) {
-                       // subversion is release <= 1.3
-                       if( !function_exists( 'simplexml_load_file' ) ) {
-                               // We could fall back to expat... YUCK
-                               return false;
-                       }
+               return false;
+       }
 
-                       // SimpleXml whines about the xmlns...
-                       wfSuppressWarnings();
-                       $xml = simplexml_load_file( $entries );
-                       wfRestoreWarnings();
-
-                       if( $xml ) {
-                               foreach( $xml->entry as $entry ) {
-                                       if( $xml->entry[0]['name'] == '' ) {
-                                               // The directory entry should always have a revision marker.
-                                               if( $entry['revision'] ) {
-                                                       return array( 'checkout-rev' => intval( $entry['revision'] ) );
-                                               }
-                                       }
-                               }
-                       }
+       /**
+        * Obtains the full path of an extensions copying or license file if
+        * one exists.
+        *
+        * @param string $extDir Path to the extensions root directory
+        *
+        * @since 1.23
+        *
+        * @return bool|string False if no such file exists, otherwise returns
+        * a path to it.
+        */
+       public static function getExtLicenseFileName( $extDir ) {
+               if ( !$extDir ) {
                        return false;
                }
 
-               // subversion is release 1.4 or above
-               if ( count( $lines ) < 11 ) {
-                       return false;
+               foreach ( scandir( $extDir ) as $file ) {
+                       $fullPath = $extDir . DIRECTORY_SEPARATOR . $file;
+                       if ( preg_match( '/^((COPYING)|(LICENSE))(\.txt)?$/', $file ) &&
+                               is_readable( $fullPath ) &&
+                               is_file( $fullPath )
+                       ) {
+                               return $fullPath;
+                       }
                }
-               $info = array(
-                       'checkout-rev' => intval( trim( $lines[3] ) ),
-                       'url' => trim( $lines[4] ),
-                       'repo-url' => trim( $lines[5] ),
-                       'directory-rev' => intval( trim( $lines[10] ) )
-               );
-               if ( isset( self::$viewvcUrls[$info['repo-url']] ) ) {
-                       $viewvc = str_replace( 
-                               $info['repo-url'], 
-                               self::$viewvcUrls[$info['repo-url']],
-                               $info['url']
-                       );
-                       $pathRelativeToRepo = substr( $info['url'], strlen( $info['repo-url'] ) );
-                       $viewvc .= '/?pathrev=';
-                       $viewvc .= urlencode( $info['checkout-rev'] );
-                       $info['viewvc-url'] = $viewvc;
+
+               return false;
+       }
+
+       /**
+        * Convert an array of items into a list for display.
+        *
+        * @param array $list List of elements to display
+        * @param bool $sort Whether to sort the items in $list
+        *
+        * @return string
+        */
+       public function listToText( $list, $sort = true ) {
+               if ( !count( $list ) ) {
+                       return '';
+               }
+               if ( $sort ) {
+                       sort( $list );
                }
-               return $info;
+
+               return $this->getLanguage()
+                       ->listToText( array_map( [ __CLASS__, 'arrayToString' ], $list ) );
        }
 
        /**
-        * Retrieve the revision number of a Subversion working directory.
+        * Convert an array or object to a string for display.
+        *
+        * @param mixed $list Will convert an array to string if given and return
+        *   the parameter unaltered otherwise
         *
-        * @param String $dir Directory of the svn checkout
-        * @return int revision number as int
+        * @return mixed
         */
-       public static function getSvnRevision( $dir ) {
-               $info = self::getSvnInfo( $dir );
-               if ( $info === false ) {
-                       return false;
-               } elseif ( isset( $info['checkout-rev'] ) ) {
-                       return $info['checkout-rev'];
+       public static function arrayToString( $list ) {
+               if ( is_array( $list ) && count( $list ) == 1 ) {
+                       $list = $list[0];
+               }
+               if ( $list instanceof Closure ) {
+                       // Don't output stuff like "Closure$;1028376090#8$48499d94fe0147f7c633b365be39952b$"
+                       return 'Closure';
+               } elseif ( is_object( $list ) ) {
+                       $class = wfMessage( 'parentheses' )->params( get_class( $list ) )->escaped();
+
+                       return $class;
+               } elseif ( !is_array( $list ) ) {
+                       return $list;
                } else {
-                       return false;
+                       if ( is_object( $list[0] ) ) {
+                               $class = get_class( $list[0] );
+                       } else {
+                               $class = $list[0];
+                       }
+
+                       return wfMessage( 'parentheses' )->params( "$class, {$list[1]}" )->escaped();
+               }
+       }
+
+       /**
+        * @param string $dir Directory of the git checkout
+        * @return bool|string Sha1 of commit HEAD points to
+        */
+       public static function getGitHeadSha1( $dir ) {
+               $repo = new GitInfo( $dir );
+
+               return $repo->getHeadSHA1();
+       }
+
+       /**
+        * @param string $dir Directory of the git checkout
+        * @return bool|string Branch currently checked out
+        */
+       public static function getGitCurrentBranch( $dir ) {
+               $repo = new GitInfo( $dir );
+               return $repo->getCurrentBranch();
+       }
+
+       /**
+        * Get the list of entry points and their URLs
+        * @return string Wikitext
+        */
+       public function getEntryPointInfo() {
+               global $wgArticlePath, $wgScriptPath;
+               $scriptPath = $wgScriptPath ? $wgScriptPath : "/";
+               $entryPoints = [
+                       'version-entrypoints-articlepath' => $wgArticlePath,
+                       'version-entrypoints-scriptpath' => $scriptPath,
+                       'version-entrypoints-index-php' => wfScript( 'index' ),
+                       'version-entrypoints-api-php' => wfScript( 'api' ),
+                       'version-entrypoints-load-php' => wfScript( 'load' ),
+               ];
+
+               $language = $this->getLanguage();
+               $thAttribures = [
+                       'dir' => $language->getDir(),
+                       'lang' => $language->getHtmlCode()
+               ];
+               $out = Html::element(
+                               'h2',
+                               [ 'id' => 'mw-version-entrypoints' ],
+                               $this->msg( 'version-entrypoints' )->text()
+                       ) .
+                       Html::openElement( 'table',
+                               [
+                                       'class' => 'wikitable plainlinks',
+                                       'id' => 'mw-version-entrypoints-table',
+                                       'dir' => 'ltr',
+                                       'lang' => 'en'
+                               ]
+                       ) .
+                       Html::openElement( 'tr' ) .
+                       Html::element(
+                               'th',
+                               $thAttribures,
+                               $this->msg( 'version-entrypoints-header-entrypoint' )->text()
+                       ) .
+                       Html::element(
+                               'th',
+                               $thAttribures,
+                               $this->msg( 'version-entrypoints-header-url' )->text()
+                       ) .
+                       Html::closeElement( 'tr' );
+
+               foreach ( $entryPoints as $message => $value ) {
+                       $url = wfExpandUrl( $value, PROTO_RELATIVE );
+                       $out .= Html::openElement( 'tr' ) .
+                               // ->text() looks like it should be ->parse(), but this function
+                               // returns wikitext, not HTML, boo
+                               Html::rawElement( 'td', [], $this->msg( $message )->text() ) .
+                               Html::rawElement( 'td', [], Html::rawElement( 'code', [], "[$url $value]" ) ) .
+                               Html::closeElement( 'tr' );
                }
+
+               $out .= Html::closeElement( 'table' );
+
+               return $out;
        }
 
-       /**#@-*/
+       protected function getGroupName() {
+               return 'wiki';
+       }
 }