maintenance/minify.php

   1 <?php
   2 /**
   3  * Minify a file or set of files
   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 __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script that minifies a file or set of files.
  28  *
  29  * @ingroup Maintenance
  30  */
  31 class MinifyScript extends Maintenance {
  32         public $outDir;
  33
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->addOption( 'outfile',
  37                         'File for output. Only a single file may be specified for input.',
  38                         false, true );
  39                 $this->addOption( 'outdir',
  40                         "Directory for output. If this is not specified, and neither is --outfile, then the\n" .
  41                         "output files will be sent to the same directories as the input files.",
  42                         false, true );
  43                 $this->mDescription = "Minify a file or set of files.\n\n" .
  44                         "If --outfile is not specified, then the output file names will have a .min extension\n" .
  45                         "added, e.g. jquery.js -> jquery.min.js.";
  46         }
  47
  48         public function execute() {
  49                 if ( !count( $this->mArgs ) ) {
  50                         $this->error( "minify.php: At least one input file must be specified." );
  51                         exit( 1 );
  52                 }
  53
  54                 if ( $this->hasOption( 'outfile' ) ) {
  55                         if ( count( $this->mArgs ) > 1 ) {
  56                                 $this->error( '--outfile may only be used with a single input file.' );
  57                                 exit( 1 );
  58                         }
  59
  60                         // Minify one file
  61                         $this->minify( $this->getArg( 0 ), $this->getOption( 'outfile' ) );
  62
  63                         return;
  64                 }
  65
  66                 $outDir = $this->getOption( 'outdir', false );
  67
  68                 foreach ( $this->mArgs as $arg ) {
  69                         $inPath = realpath( $arg );
  70                         $inName = basename( $inPath );
  71                         $inDir = dirname( $inPath );
  72
  73                         if ( strpos( $inName, '.min.' ) !== false ) {
  74                                 $this->error( "Skipping $inName\n" );
  75                                 continue;
  76                         }
  77
  78                         if ( !file_exists( $inPath ) ) {
  79                                 $this->error( "File does not exist: $arg", true );
  80                         }
  81
  82                         $extension = $this->getExtension( $inName );
  83                         $outName = substr( $inName, 0, -strlen( $extension ) ) . 'min.' . $extension;
  84                         if ( $outDir === false ) {
  85                                 $outPath = $inDir . '/' . $outName;
  86                         } else {
  87                                 $outPath = $outDir . '/' . $outName;
  88                         }
  89
  90                         $this->minify( $inPath, $outPath );
  91                 }
  92         }
  93
  94         public function getExtension( $fileName ) {
  95                 $dotPos = strrpos( $fileName, '.' );
  96                 if ( $dotPos === false ) {
  97                         $this->error( "No file extension, cannot determine type: $fileName" );
  98                         exit( 1 );
  99                 }
 100
 101                 return substr( $fileName, $dotPos + 1 );
 102         }
 103
 104         public function minify( $inPath, $outPath ) {
 105                 $extension = $this->getExtension( $inPath );
 106                 $this->output( basename( $inPath ) . ' -> ' . basename( $outPath ) . '...' );
 107
 108                 $inText = file_get_contents( $inPath );
 109                 if ( $inText === false ) {
 110                         $this->error( "Unable to open file $inPath for reading." );
 111                         exit( 1 );
 112                 }
 113                 $outFile = fopen( $outPath, 'w' );
 114                 if ( !$outFile ) {
 115                         $this->error( "Unable to open file $outPath for writing." );
 116                         exit( 1 );
 117                 }
 118
 119                 switch ( $extension ) {
 120                         case 'js':
 121                                 $outText = JavaScriptMinifier::minify( $inText );
 122                                 break;
 123                         case 'css':
 124                                 $outText = CSSMin::minify( $inText );
 125                                 break;
 126                         default:
 127                                 $this->error( "No minifier defined for extension \"$extension\"" );
 128                 }
 129
 130                 fwrite( $outFile, $outText );
 131                 fclose( $outFile );
 132                 $this->output( " ok\n" );
 133         }
 134 }
 135
 136 $maintClass = 'MinifyScript';
 137 require_once RUN_MAINTENANCE_IF_MAIN;