* Add method to FileRepo to get the human-readable name of the repository (getDisplayName())

* Use this in ImagePage to show what repo the dupes are from
* Added default "shared repository" message for shared repos without names.

includes/ImagePage.php

@@ -646,13 +646,15 @@ EOT
 
 		$sk = $wgUser->getSkin();
 		foreach ( $dupes as $file ) {
+			$fromSrc = '';
 			if( $file->isLocal() )
 				$link = $sk->makeKnownLinkObj( $file->getTitle(), "" );
 			else {
 				$link = $sk->makeExternalLink( $file->getDescriptionUrl(),
 					$file->getTitle()->getPrefixedText() );
+				$fromSrc = wfMsg( 'shared-repo-from', $file->getRepo()->getDisplayName() );
 			}
-			$wgOut->addHTML( "<li>{$link}</li>\n" );
+			$wgOut->addHTML( "<li>{$link} {$fromSrc}</li>\n" );
 		}
 		$wgOut->addHTML( "</ul></div>\n" );
 	}

includes/filerepo/FileRepo.php

@@ -538,4 +538,20 @@ abstract class FileRepo {
 	function findBySha1( $hash ) {
 		return array();
 	}
+	
+	/**
+	 * Get the human-readable name of the repo. 
+	 * @return string
+	 */
+	public function getDisplayName() {
+		// We don't name our own repo, return nothing
+		if ( $this->name == 'local' ) {
+			return null;
+		}
+		$repoName = wfMsg( 'shared-repo-' . $this->name );
+		if ( !wfEmptyMsg( 'shared-repo-' . $this->name, $repoName ) ) {
+			return $repoName;
+		}
+		return wfMsg( 'shared-repo' ); 
+	}
 }

languages/messages/MessagesEn.php

@@ -1989,6 +1989,8 @@ A [[Special:WhatLinksHere/$2|full list]] is available.',
 'noimage'                        => 'No file by this name exists, but you can $1.',
 'noimage-linktext'               => 'upload one',
 'uploadnewversion-linktext'      => 'Upload a new version of this file',
+'shared-repo-from'				 => 'from $1', // $1 is the repository name
+'shared-repo'					 => 'shared repository', // used when shared-repo-NAME doesn't exist
 
 # File reversion
 'filerevert'                => 'Revert $1',

maintenance/language/messages.inc

@@ -1246,6 +1246,8 @@ $wgMessageStructure = array(
 		'noimage',
 		'noimage-linktext',
 		'uploadnewversion-linktext',
+		'shared-repo-from',
+		'shared-repo',
 	),
 	'filerevert' => array(
 		'filerevert',