maintenance/copyFileBackend.php

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