1 files changed, 119 insertions, 0 deletions
diff --git a/www/wiki/maintenance/storage/resolveStubs.php b/www/wiki/maintenance/storage/resolveStubs.php
new file mode 100644
index 00000000..f9ec3987
--- /dev/null
+++ b/www/wiki/maintenance/storage/resolveStubs.php
@@ -0,0 +1,119 @@
+<?php
+/**
+ * Convert history stubs that point to an external row to direct external
+ * pointers.
+ *
+ * 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 Maintenance ExternalStorage
+ */
+
+if ( !defined( 'MEDIAWIKI' ) ) {
+	$optionsWithArgs = [ 'm' ];
+
+	require_once __DIR__ . '/../commandLine.inc';
+
+	resolveStubs();
+}
+
+/**
+ * Convert history stubs that point to an external row to direct
+ * external pointers
+ */
+function resolveStubs() {
+	$fname = 'resolveStubs';
+
+	$dbr = wfGetDB( DB_REPLICA );
+	$maxID = $dbr->selectField( 'text', 'MAX(old_id)', '', $fname );
+	$blockSize = 10000;
+	$numBlocks = intval( $maxID / $blockSize ) + 1;
+
+	for ( $b = 0; $b < $numBlocks; $b++ ) {
+		wfWaitForSlaves();
+
+		printf( "%5.2f%%\n", $b / $numBlocks * 100 );
+		$start = intval( $maxID / $numBlocks ) * $b + 1;
+		$end = intval( $maxID / $numBlocks ) * ( $b + 1 );
+
+		$res = $dbr->select( 'text', [ 'old_id', 'old_text', 'old_flags' ],
+			"old_id>=$start AND old_id<=$end " .
+			"AND old_flags LIKE '%object%' AND old_flags NOT LIKE '%external%' " .
+			'AND LOWER(CONVERT(LEFT(old_text,22) USING latin1)) = \'o:15:"historyblobstub"\'',
+			$fname );
+		foreach ( $res as $row ) {
+			resolveStub( $row->old_id, $row->old_text, $row->old_flags );
+		}
+	}
+	print "100%\n";
+}
+
+/**
+ * Resolve a history stub
+ * @param int $id
+ * @param string $stubText
+ * @param string $flags
+ */
+function resolveStub( $id, $stubText, $flags ) {
+	$fname = 'resolveStub';
+
+	$stub = unserialize( $stubText );
+	$flags = explode( ',', $flags );
+
+	$dbr = wfGetDB( DB_REPLICA );
+	$dbw = wfGetDB( DB_MASTER );
+
+	if ( strtolower( get_class( $stub ) ) !== 'historyblobstub' ) {
+		print "Error found object of class " . get_class( $stub ) . ", expecting historyblobstub\n";
+
+		return;
+	}
+
+	# Get the (maybe) external row
+	$externalRow = $dbr->selectRow(
+		'text',
+		[ 'old_text' ],
+		[
+			'old_id' => $stub->mOldId,
+			'old_flags' . $dbr->buildLike( $dbr->anyString(), 'external', $dbr->anyString() )
+		],
+		$fname
+	);
+
+	if ( !$externalRow ) {
+		# Object wasn't external
+		return;
+	}
+
+	# Preserve the legacy encoding flag, but switch from object to external
+	if ( in_array( 'utf-8', $flags ) ) {
+		$newFlags = 'external,utf-8';
+	} else {
+		$newFlags = 'external';
+	}
+
+	# Update the row
+	# print "oldid=$id\n";
+	$dbw->update( 'text',
+		[ /* SET */
+			'old_flags' => $newFlags,
+			'old_text' => $externalRow->old_text . '/' . $stub->mHash
+		],
+		[ /* WHERE */
+			'old_id' => $id
+		], $fname
+	);
+}