Merge branch 'archwiki'

Conflicts:
	extensions/FluxBBAuthPlugin.php
	extensions/SyntaxHighlight_GeSHi/README
	extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.class.php
	extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.i18n.php
	extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.php
	extensions/SyntaxHighlight_GeSHi/geshi/docs/CHANGES
	extensions/SyntaxHighlight_GeSHi/geshi/docs/THANKS
	extensions/SyntaxHighlight_GeSHi/geshi/docs/TODO
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractClass.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractClass_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractMethod.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateClass.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateClass_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateMethod.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Class.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Class_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Constant.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Constructor.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Destructor.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Function.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Global.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/I.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Index.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Interface.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Interface_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/L.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Lminus.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Lplus.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Method.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Page.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Page_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/PrivateClass.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/PrivateClass_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/PrivateMethod.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/PrivateVariable.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/StaticMethod.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/StaticVariable.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/T.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Tminus.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Tplus.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Variable.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/blank.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/class_folder.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/file.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/folder.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/function_folder.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/next_button.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/next_button_disabled.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/package.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/package_folder.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/previous_button.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/previous_button_disabled.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/private_class_logo.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/tutorial.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/tutorial_folder.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/up_button.png
	extensions/SyntaxHighlight_GeSHi/geshi/docs/geshi-doc.html
	extensions/SyntaxHighlight_GeSHi/geshi/docs/geshi-doc.txt
	extensions/SyntaxHighlight_GeSHi/geshi/geshi.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/4cs.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/6502acme.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/6502kickass.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/6502tasm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/68000devpac.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/abap.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/actionscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/actionscript3.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ada.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/algol68.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/apache.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/applescript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/apt_sources.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/asm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/asp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/autoconf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/autohotkey.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/autoit.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/avisynth.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/awk.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/bascomavr.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/bash.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/basic4gl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/bf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/bibtex.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/blitzbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/bnf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/boo.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/c.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/c_loadrunner.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/c_mac.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/caddcl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cadlisp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cfdg.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cfm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/chaiscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cil.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/clojure.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cmake.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cobol.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/coffeescript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cpp-qt.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cpp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/csharp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/css.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/cuesheet.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/d.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/dcs.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/delphi.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/diff.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/div.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/dos.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/dot.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/e.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ecmascript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/eiffel.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/email.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/epc.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/erlang.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/euphoria.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/f1.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/falcon.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/fo.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/fortran.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/freebasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/fsharp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gambas.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gdb.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/genero.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/genie.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gettext.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/glsl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gml.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gnuplot.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/go.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/groovy.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/gwbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/haskell.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/hicest.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/hq9plus.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/html4strict.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/html5.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/icon.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/idl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ini.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/inno.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/intercal.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/io.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/j.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/java.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/java5.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/javascript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/jquery.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/kixtart.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/klonec.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/klonecpp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/latex.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lb.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lisp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/llvm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/locobasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/logtalk.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lolcode.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lotusformulas.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lotusscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lsl2.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/lua.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/m68k.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/magiksf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/make.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mapbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/matlab.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mirc.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mmix.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/modula2.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/modula3.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mpasm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mxml.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/mysql.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/newlisp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/nsis.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oberon2.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/objc.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/objeck.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ocaml-brief.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ocaml.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oobas.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oracle11.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oracle8.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oxygene.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/oz.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pascal.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pcre.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/per.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/perl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/perl6.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/php-brief.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/php.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pic16.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pike.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pixelbender.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pli.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/plsql.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/postgresql.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/povray.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/powerbuilder.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/powershell.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/proftpd.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/progress.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/prolog.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/properties.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/providex.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/purebasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/pycon.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/python.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/q.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/qbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/rails.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/rebol.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/reg.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/robots.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/rpmspec.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/rsplus.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/ruby.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/sas.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/scala.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/scheme.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/scilab.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/sdlbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/smalltalk.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/smarty.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/sql.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/systemverilog.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/tcl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/teraterm.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/text.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/thinbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/tsql.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/typoscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/unicon.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/uscript.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/vala.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/vb.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/vbnet.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/verilog.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/vhdl.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/vim.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/visualfoxpro.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/visualprolog.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/whitespace.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/whois.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/winbatch.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/xbasic.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/xml.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/xorg_conf.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/xpp.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/yaml.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/z80.php
	extensions/SyntaxHighlight_GeSHi/geshi/geshi/zxbasic.php

1 files changed, 197 insertions, 41 deletions

diff --git a/maintenance/copyFileBackend.php b/maintenance/copyFileBackend.php
index aebdee17..21ef4ffa 100644
--- a/maintenance/copyFileBackend.php
+++ b/maintenance/copyFileBackend.php
@@ -21,7 +21,7 @@
  * @ingroup Maintenance
  */
 
-require_once( __DIR__ . '/Maintenance.php' );
+require_once __DIR__ . '/Maintenance.php';
 
 /**
  * Copy all files in one container of one backend to another.
@@ -35,6 +35,8 @@ require_once( __DIR__ . '/Maintenance.php' );
  * @ingroup Maintenance
  */
 class CopyFileBackend extends Maintenance {
+	protected $statCache = array();
+
 	public function __construct() {
 		parent::__construct();
 		$this->mDescription = "Copy files in one backend to another.";
@@ -43,8 +45,10 @@ class CopyFileBackend extends Maintenance {
 		$this->addOption( 'containers', 'Pipe separated list of containers', true, true );
 		$this->addOption( 'subdir', 'Only do items in this child directory', false, true );
 		$this->addOption( 'ratefile', 'File to check periodically for batch size', false, true );
+		$this->addOption( 'prestat', 'Stat the destination files first (try to use listings)' );
 		$this->addOption( 'skiphash', 'Skip SHA-1 sync checks for files' );
 		$this->addOption( 'missingonly', 'Only copy files missing from destination listing' );
+		$this->addOption( 'syncviadelete', 'Delete destination files missing from source listing' );
 		$this->addOption( 'utf8only', 'Skip source files that do not have valid UTF-8 names' );
 		$this->setBatchSize( 50 );
 	}
@@ -53,7 +57,7 @@ class CopyFileBackend extends Maintenance {
 		$src = FileBackendGroup::singleton()->get( $this->getOption( 'src' ) );
 		$dst = FileBackendGroup::singleton()->get( $this->getOption( 'dst' ) );
 		$containers = explode( '|', $this->getOption( 'containers' ) );
-		$subDir = $this->getOption( rtrim( 'subdir', '/' ), '' );
+		$subDir = rtrim( $this->getOption( 'subdir', '' ), '/' );
 
 		$rateFile = $this->getOption( 'ratefile' );
 
@@ -61,7 +65,6 @@ class CopyFileBackend extends Maintenance {
 			$this->error( "Cannot check for UTF-8, mbstring extension missing.", 1 ); // die
 		}
 
-		$count = 0;
 		foreach ( $containers as $container ) {
 			if ( $subDir != '' ) {
 				$backendRel = "$container/$subDir";
@@ -71,40 +74,46 @@ class CopyFileBackend extends Maintenance {
 				$this->output( "Doing container '$container'...\n" );
 			}
 
-			$srcPathsRel = $src->getFileList( array(
-				'dir' => $src->getRootStoragePath() . "/$backendRel" ) );
-			if ( $srcPathsRel === null ) {
-				$this->error( "Could not list files in $container.", 1 ); // die
-			}
-
-			// Do a listing comparison if specified
 			if ( $this->hasOption( 'missingonly' ) ) {
-				$relFilesSrc = array();
-				$relFilesDst = array();
-				foreach ( $srcPathsRel as $srcPathRel ) {
-					$relFilesSrc[] = $srcPathRel;
+				$this->output( "\tBuilding list of missing files..." );
+				$srcPathsRel = $this->getListingDiffRel( $src, $dst, $backendRel );
+				$this->output( count( $srcPathsRel ) . " file(s) need to be copied.\n" );
+			} else {
+				$srcPathsRel = $src->getFileList( array(
+					'dir' => $src->getRootStoragePath() . "/$backendRel",
+					'adviseStat' => true // avoid HEADs
+				) );
+				if ( $srcPathsRel === null ) {
+					$this->error( "Could not list files in $container.", 1 ); // die
 				}
+			}
+
+			if ( $this->getOption( 'prestat' ) && !$this->hasOption( 'missingonly' ) ) {
+				// Build the stat cache for the destination files
+				$this->output( "\tBuilding destination stat cache..." );
 				$dstPathsRel = $dst->getFileList( array(
-					'dir' => $dst->getRootStoragePath() . "/$backendRel" ) );
+					'dir' => $dst->getRootStoragePath() . "/$backendRel",
+					'adviseStat' => true // avoid HEADs
+				) );
 				if ( $dstPathsRel === null ) {
 					$this->error( "Could not list files in $container.", 1 ); // die
 				}
+				$this->statCache = array(); // clear
 				foreach ( $dstPathsRel as $dstPathRel ) {
-					$relFilesDst[] = $dstPathRel;
+					$path = $dst->getRootStoragePath() . "/$backendRel/$dstPathRel";
+					$this->statCache[sha1( $path )] = $dst->getFileStat( array( 'src' => $path ) );
 				}
-				// Only copy the missing files over in the next loop
-				$srcPathsRel = array_diff( $relFilesSrc, $relFilesDst );
-				$this->output( count( $srcPathsRel ) . " file(s) need to be copied.\n" );
-				unset( $relFilesSrc );
-				unset( $relFilesDst );
+				$this->output( "done [" . count( $this->statCache ) . " file(s)]\n" );
 			}
 
+			$this->output( "\tCopying file(s)...\n" );
+			$count = 0;
 			$batchPaths = array();
 			foreach ( $srcPathsRel as $srcPathRel ) {
 				// Check up on the rate file periodically to adjust the concurrency
 				if ( $rateFile && ( !$count || ( $count % 500 ) == 0 ) ) {
 					$this->mBatchSize = max( 1, (int)file_get_contents( $rateFile ) );
-					$this->output( "Batch size is now {$this->mBatchSize}.\n" );
+					$this->output( "\tBatch size is now {$this->mBatchSize}.\n" );
 				}
 				$batchPaths[$srcPathRel] = 1; // remove duplicates
 				if ( count( $batchPaths ) >= $this->mBatchSize ) {
@@ -117,6 +126,36 @@ class CopyFileBackend extends Maintenance {
 				$this->copyFileBatch( array_keys( $batchPaths ), $backendRel, $src, $dst );
 				$batchPaths = array(); // done
 			}
+			$this->output( "\tCopied $count file(s).\n" );
+
+			if ( $this->hasOption( 'syncviadelete' ) ) {
+				$this->output( "\tBuilding list of excess destination files..." );
+				$delPathsRel = $this->getListingDiffRel( $dst, $src, $backendRel );
+				$this->output( count( $delPathsRel ) . " file(s) need to be deleted.\n" );
+
+				$this->output( "\tDeleting file(s)...\n" );
+				$count = 0;
+				$batchPaths = array();
+				foreach ( $delPathsRel as $delPathRel ) {
+					// Check up on the rate file periodically to adjust the concurrency
+					if ( $rateFile && ( !$count || ( $count % 500 ) == 0 ) ) {
+						$this->mBatchSize = max( 1, (int)file_get_contents( $rateFile ) );
+						$this->output( "\tBatch size is now {$this->mBatchSize}.\n" );
+					}
+					$batchPaths[$delPathRel] = 1; // remove duplicates
+					if ( count( $batchPaths ) >= $this->mBatchSize ) {
+						$this->delFileBatch( array_keys( $batchPaths ), $backendRel, $dst );
+						$batchPaths = array(); // done
+					}
+					++$count;
+				}
+				if ( count( $batchPaths ) ) { // left-overs
+					$this->delFileBatch( array_keys( $batchPaths ), $backendRel, $dst );
+					$batchPaths = array(); // done
+				}
+
+				$this->output( "\tDeleted $count file(s).\n" );
+			}
 
 			if ( $subDir != '' ) {
 				$this->output( "Finished container '$container', directory '$subDir'.\n" );
@@ -125,34 +164,101 @@ class CopyFileBackend extends Maintenance {
 			}
 		}
 
-		$this->output( "Done [$count file(s)].\n" );
+		$this->output( "Done.\n" );
+	}
+
+	/**
+	 * @param FileBackend $src
+	 * @param FileBackend $dst
+	 * @param string $backendRel
+	 * @return array (rel paths in $src minus those in $dst)
+	 */
+	protected function getListingDiffRel( FileBackend $src, FileBackend $dst, $backendRel ) {
+		$srcPathsRel = $src->getFileList( array(
+			'dir' => $src->getRootStoragePath() . "/$backendRel" ) );
+		if ( $srcPathsRel === null ) {
+			$this->error( "Could not list files in source container.", 1 ); // die
+		}
+		$dstPathsRel = $dst->getFileList( array(
+			'dir' => $dst->getRootStoragePath() . "/$backendRel" ) );
+		if ( $dstPathsRel === null ) {
+			$this->error( "Could not list files in destination container.", 1 ); // die
+		}
+		// Get the list of destination files
+		$relFilesDstSha1 = array();
+		foreach ( $dstPathsRel as $dstPathRel ) {
+			$relFilesDstSha1[sha1( $dstPathRel )] = 1;
+		}
+		unset( $dstPathsRel ); // free
+		// Get the list of missing files
+		$missingPathsRel = array();
+		foreach ( $srcPathsRel as $srcPathRel ) {
+			if ( !isset( $relFilesDstSha1[sha1( $srcPathRel )] ) ) {
+				$missingPathsRel[] = $srcPathRel;
+			}
+		}
+		unset( $srcPathsRel ); // free
+
+		return $missingPathsRel;
 	}
 
+	/**
+	 * @param array $srcPathsRel
+	 * @param string $backendRel
+	 * @param FileBackend $src
+	 * @param FileBackend $dst
+	 * @return void
+	 */
 	protected function copyFileBatch(
 		array $srcPathsRel, $backendRel, FileBackend $src, FileBackend $dst
 	) {
 		$ops = array();
 		$fsFiles = array();
 		$copiedRel = array(); // for output message
+		$wikiId = $src->getWikiId();
+
+		// Download the batch of source files into backend cache...
+		if ( $this->hasOption( 'missingonly' ) ) {
+			$srcPaths = array();
+			foreach ( $srcPathsRel as $srcPathRel ) {
+				$srcPaths[] = $src->getRootStoragePath() . "/$backendRel/$srcPathRel";
+			}
+			$t_start = microtime( true );
+			$fsFiles = $src->getLocalReferenceMulti( array( 'srcs' => $srcPaths, 'latest' => 1 ) );
+			$ellapsed_ms = floor( ( microtime( true ) - $t_start ) * 1000 );
+			$this->output( "\n\tDownloaded these file(s) [{$ellapsed_ms}ms]:\n\t" .
+				implode( "\n\t", $srcPaths ) . "\n\n" );
+		}
+
+		// Determine what files need to be copied over...
 		foreach ( $srcPathsRel as $srcPathRel ) {
 			$srcPath = $src->getRootStoragePath() . "/$backendRel/$srcPathRel";
 			$dstPath = $dst->getRootStoragePath() . "/$backendRel/$srcPathRel";
 			if ( $this->hasOption( 'utf8only' ) && !mb_check_encoding( $srcPath, 'UTF-8' ) ) {
-				$this->error( "Detected illegal (non-UTF8) path for $srcPath." );
+				$this->error( "$wikiId: Detected illegal (non-UTF8) path for $srcPath." );
 				continue;
-			} elseif ( $this->filesAreSame( $src, $dst, $srcPath, $dstPath ) ) {
-				$this->output( "Already have $srcPathRel.\n" );
+			} elseif ( !$this->hasOption( 'missingonly' )
+				&& $this->filesAreSame( $src, $dst, $srcPath, $dstPath ) )
+			{
+				$this->output( "\tAlready have $srcPathRel.\n" );
 				continue; // assume already copied...
 			}
-			// Note: getLocalReference() is fast for FS backends
-			$fsFile = $src->getLocalReference( array( 'src' => $srcPath, 'latest' => 1 ) );
+			$fsFile = array_key_exists( $srcPath, $fsFiles )
+				? $fsFiles[$srcPath]
+				: $src->getLocalReference( array( 'src' => $srcPath, 'latest' => 1 ) );
 			if ( !$fsFile ) {
-				$this->error( "Could not get local copy of $srcPath.", 1 ); // die
+				$src->clearCache( array( $srcPath ) );
+				if ( $src->fileExists( array( 'src' => $srcPath, 'latest' => 1 ) ) === false ) {
+					$this->error( "$wikiId: File '$srcPath' was listed but does not exist." );
+				} else {
+					$this->error( "$wikiId: Could not get local copy of $srcPath." );
+				}
+				continue;
 			} elseif ( !$fsFile->exists() ) {
 				// FSFileBackends just return the path for getLocalReference() and paths with
 				// illegal slashes may get normalized to a different path. This can cause the
 				// local reference to not exist...skip these broken files.
-				$this->error( "Detected possible illegal path for $srcPath." );
+				$this->error( "$wikiId: Detected possible illegal path for $srcPath." );
 				continue;
 			}
 			$fsFiles[] = $fsFile; // keep TempFSFile objects alive as needed
@@ -160,13 +266,14 @@ class CopyFileBackend extends Maintenance {
 			$status = $dst->prepare( array( 'dir' => dirname( $dstPath ), 'bypassReadOnly' => 1 ) );
 			if ( !$status->isOK() ) {
 				$this->error( print_r( $status->getErrorsArray(), true ) );
-				$this->error( "Could not copy $srcPath to $dstPath.", 1 ); // die
+				$this->error( "$wikiId: Could not copy $srcPath to $dstPath.", 1 ); // die
 			}
 			$ops[] = array( 'op' => 'store',
 				'src' => $fsFile->getPath(), 'dst' => $dstPath, 'overwrite' => 1 );
 			$copiedRel[] = $srcPathRel;
 		}
 
+		// Copy in the batch of source files...
 		$t_start = microtime( true );
 		$status = $dst->doQuickOperations( $ops, array( 'bypassReadOnly' => 1 ) );
 		if ( !$status->isOK() ) {
@@ -176,26 +283,75 @@ class CopyFileBackend extends Maintenance {
 		$ellapsed_ms = floor( ( microtime( true ) - $t_start ) * 1000 );
 		if ( !$status->isOK() ) {
 			$this->error( print_r( $status->getErrorsArray(), true ) );
-			$this->error( "Could not copy file batch.", 1 ); // die
+			$this->error( "$wikiId: Could not copy file batch.", 1 ); // die
 		} elseif ( count( $copiedRel ) ) {
-			$this->output( "\nCopied these file(s) [{$ellapsed_ms}ms]:\n" .
-				implode( "\n", $copiedRel ) . "\n\n" );
+			$this->output( "\n\tCopied these file(s) [{$ellapsed_ms}ms]:\n\t" .
+				implode( "\n\t", $copiedRel ) . "\n\n" );
+		}
+	}
+
+	/**
+	 * @param array $dstPathsRel
+	 * @param string $backendRel
+	 * @param FileBackend $dst
+	 * @return void
+	 */
+	protected function delFileBatch(
+		array $dstPathsRel, $backendRel, FileBackend $dst
+	) {
+		$ops = array();
+		$deletedRel = array(); // for output message
+		$wikiId = $dst->getWikiId();
+
+		// Determine what files need to be copied over...
+		foreach ( $dstPathsRel as $dstPathRel ) {
+			$dstPath = $dst->getRootStoragePath() . "/$backendRel/$dstPathRel";
+			$ops[] = array( 'op' => 'delete', 'src' => $dstPath );
+			$deletedRel[] = $dstPathRel;
+		}
+
+		// Delete the batch of source files...
+		$t_start = microtime( true );
+		$status = $dst->doQuickOperations( $ops, array( 'bypassReadOnly' => 1 ) );
+		if ( !$status->isOK() ) {
+			sleep( 10 ); // wait and retry copy again
+			$status = $dst->doQuickOperations( $ops, array( 'bypassReadOnly' => 1 ) );
+		}
+		$ellapsed_ms = floor( ( microtime( true ) - $t_start ) * 1000 );
+		if ( !$status->isOK() ) {
+			$this->error( print_r( $status->getErrorsArray(), true ) );
+			$this->error( "$wikiId: Could not delete file batch.", 1 ); // die
+		} elseif ( count( $deletedRel ) ) {
+			$this->output( "\n\tDeleted these file(s) [{$ellapsed_ms}ms]:\n\t" .
+				implode( "\n\t", $deletedRel ) . "\n\n" );
 		}
 	}
 
+	/**
+	 * @param FileBackend $src
+	 * @param FileBackend $dst
+	 * @param string $sPath
+	 * @param string $dPath
+	 * @return bool
+	 */
 	protected function filesAreSame( FileBackend $src, FileBackend $dst, $sPath, $dPath ) {
 		$skipHash = $this->hasOption( 'skiphash' );
+		$srcStat = $src->getFileStat( array( 'src' => $sPath ) );
+		$dPathSha1 = sha1( $dPath );
+		$dstStat = isset( $this->statCache[$dPathSha1] )
+			? $this->statCache[$dPathSha1]
+			: $dst->getFileStat( array( 'src' => $dPath ) );
 		return (
-			( $src->fileExists( array( 'src' => $sPath, 'latest' => 1 ) )
-				=== $dst->fileExists( array( 'src' => $dPath, 'latest' => 1 ) ) // short-circuit
-			) && ( $src->getFileSize( array( 'src' => $sPath, 'latest' => 1 ) )
-				=== $dst->getFileSize( array( 'src' => $dPath, 'latest' => 1 ) ) // short-circuit
-			) && ( $skipHash || ( $src->getFileSha1Base36( array( 'src' => $sPath, 'latest' => 1 ) )
+			is_array( $srcStat ) // sanity check that source exists
+			&& is_array( $dstStat ) // dest exists
+			&& $srcStat['size'] === $dstStat['size']
+			&& ( !$skipHash || $srcStat['mtime'] <= $dstStat['mtime'] )
+			&& ( $skipHash || $src->getFileSha1Base36( array( 'src' => $sPath, 'latest' => 1 ) )
 				=== $dst->getFileSha1Base36( array( 'src' => $dPath, 'latest' => 1 ) )
-			) )
+			)
 		);
 	}
 }
 
 $maintClass = 'CopyFileBackend';
-require_once( RUN_MAINTENANCE_IF_MAIN );
+require_once RUN_MAINTENANCE_IF_MAIN;