1 files changed, 67 insertions, 10 deletions

diff --git a/includes/specials/SpecialWantedfiles.php b/includes/specials/SpecialWantedfiles.php
index b5c1fdbe..937a503c 100644
--- a/includes/specials/SpecialWantedfiles.php
+++ b/includes/specials/SpecialWantedfiles.php
@@ -49,40 +49,97 @@ class WantedFilesPage extends WantedQueryPage {
 			$category = false;
 		}
 
+		$noForeign = '';
+		if ( !$this->likelyToHaveFalsePositives() ) {
+			// Additional messages for grep:
+			// wantedfiletext-cat-noforeign, wantedfiletext-nocat
+			$noForeign = '-noforeign';
+		}
+
 		if ( $category ) {
 			return $this
-				->msg( 'wantedfiletext-cat' )
+				->msg( 'wantedfiletext-cat' . $noForeign )
 				->params( $category->getFullText() )
 				->parseAsBlock();
 		} else {
 			return $this
-				->msg( 'wantedfiletext-nocat' )
+				->msg( 'wantedfiletext-nocat' . $noForeign )
 				->parseAsBlock();
 		}
 	}
 
 	/**
+	 * Whether foreign repos are likely to cause false positives
+	 *
+	 * In its own function to allow subclasses to override.
+	 * @see SpecialWantedFilesGUOverride in GlobalUsage extension.
+	 * @since 1.24
+	 */
+	protected function likelyToHaveFalsePositives() {
+		return RepoGroup::singleton()->hasForeignRepos();
+	}
+
+	/**
 	 * KLUGE: The results may contain false positives for files
 	 * that exist e.g. in a shared repo.  Setting this at least
 	 * keeps them from showing up as redlinks in the output, even
 	 * if it doesn't fix the real problem (bug 6220).
+	 *
+	 * @note could also have existing links here from broken file
+	 * redirects.
 	 * @return bool
 	 */
 	function forceExistenceCheck() {
 		return true;
 	}
 
+	/**
+	 * Does the file exist?
+	 *
+	 * Use wfFindFile so we still think file namespace pages without
+	 * files are missing, but valid file redirects and foreign files are ok.
+	 *
+	 * @return boolean
+	 */
+	protected function existenceCheck( Title $title ) {
+		return (bool) wfFindFile( $title );
+	}
+
 	function getQueryInfo() {
 		return array(
-			'tables' => array( 'imagelinks', 'image' ),
-			'fields' => array( 'namespace' => NS_FILE,
-					'title' => 'il_to',
-					'value' => 'COUNT(*)' ),
-			'conds' => array( 'img_name IS NULL' ),
+			'tables' => array(
+				'imagelinks',
+				'page',
+				'redirect',
+				'img1' => 'image',
+				'img2' => 'image',
+			),
+			'fields' => array(
+				'namespace' => NS_FILE,
+				'title' => 'il_to',
+				'value' => 'COUNT(*)'
+			),
+			'conds' => array(
+				'img1.img_name' => null,
+				// We also need to exclude file redirects
+				'img2.img_name' => null,
+			),
 			'options' => array( 'GROUP BY' => 'il_to' ),
-			'join_conds' => array( 'image' =>
-				array( 'LEFT JOIN',
-					array( 'il_to = img_name' )
+			'join_conds' => array(
+				'img1' => array( 'LEFT JOIN',
+					'il_to = img1.img_name'
+				),
+				'page' => array( 'LEFT JOIN', array(
+					'il_to = page_title',
+					'page_namespace' => NS_FILE,
+				) ),
+				'redirect' => array( 'LEFT JOIN', array(
+					'page_id = rd_from',
+					'rd_namespace' => NS_FILE,
+					'rd_interwiki' => ''
+				) ),
+				'img2' => array( 'LEFT JOIN',
+					'rd_title = img2.img_name'
 				)
 			)
 		);