maintenance/copyFileBackend.php

   1 <?php
   2 /**
   3  * Copy all files in one container of one backend to another.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  25
  26 /**
  27  * Copy all files in one container of one backend to another.
  28  *
  29  * This can also be used to re-shard the files for one backend using the
  30  * config of second backend. The second backend should have the same config
  31  * as the first, except for it having a different name and different sharding
  32  * configuration. The backend should be made read-only while this runs.
  33  * After this script finishes, the old files in the containers can be deleted.
  34  *
  35  * @ingroup Maintenance
  36  */
  37 class CopyFileBackend extends Maintenance {
  38         public function __construct() {
  39                 parent::__construct();
  40                 $this->mDescription = "Copy all the files in one backend to another.";
  41                 $this->addOption( 'src', 'Backend containing the source files', true, true );
  42                 $this->addOption( 'dst', 'Backend where files should be copied to', true, true );
  43                 $this->addOption( 'containers', 'Pipe separated list of containers', true, true );
  44                 $this->addOption( 'fast', 'Skip SHA-1 checks on pre-existing files' );
  45         }
  46
  47         public function execute() {
  48                 $src = FileBackendGroup::singleton()->get( $this->getOption( 'src' ) );
  49                 $dst = FileBackendGroup::singleton()->get( $this->getOption( 'dst' ) );
  50
  51                 $containers = explode( '|', $this->getOption( 'containers' ) );
  52                 foreach ( $containers as $container ) {
  53                         $this->output( "Doing container $container...\n" );
  54
  55                         $srcPathsRel = $src->getFileList(
  56                                 array( 'dir' => $src->getRootStoragePath() . "/$container" ) );
  57                         if ( $srcPathsRel === null ) {
  58                                 $this->error( "Could not list files in $container.", 1 ); // die
  59                         }
  60                         foreach ( $srcPathsRel as $srcPathRel ) {
  61                                 $srcPath = $src->getRootStoragePath() . "/$container/$srcPathRel";
  62                                 $dstPath = $dst->getRootStoragePath() . "/$container/$srcPathRel";
  63
  64                                 if ( $dst->fileExists( array( 'src' => $dstPath, 'latest' => 1 ) ) ) {
  65                                         if ( $this->hasOption( 'fast' ) ) {
  66                                                 $this->output( "Already have $dstPath.\n" );
  67                                                 continue; // assume already copied...
  68                                         }
  69                                         $srcSha1 = $src->getFileSha1Base36( array( 'src' => $srcPath ) );
  70                                         $dstSha1 = $dst->getFileSha1Base36( array( 'src' => $dstPath ) );
  71                                         if ( $srcSha1 && $srcSha1 === $dstSha1 ) {
  72                                                 $this->output( "Already have $dstPath.\n" );
  73                                                 continue; // already copied...
  74                                         }
  75                                 }
  76
  77                                 $fsFile = $src->getLocalReference( array( 'src' => $srcPath, 'latest' => 1 ) );
  78                                 if ( !$fsFile ) {
  79                                         $this->error( "Could not get local copy of $srcPath.", 1 ); // die
  80                                 }
  81
  82                                 $status = $dst->prepare( array( 'dir' => dirname( $dstPath ) ) );
  83                                 $status->merge( $dst->store(
  84                                         array( 'src' => $fsFile->getPath(), 'dst' => $dstPath ),
  85                                         array( 'nonLocking' => 1, 'nonJournaled' => 1 )
  86                                 ) );
  87                                 if ( !$status->isOK() ) {
  88                                         print_r( $status->getErrorsArray() );
  89                                         $this->error( "Could not copy $srcPath to $dstPath.", 1 ); // die
  90                                 }
  91
  92                                 $this->output( "Copied $srcPath to $dstPath.\n" );
  93                         }
  94                 }
  95         }
  96 }
  97
  98 $maintClass = 'CopyFileBackend';
  99 require_once( RUN_MAINTENANCE_IF_MAIN );