minify.php

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<?php
require_once( dirname( __FILE__ ) . '/Maintenance.php' );

class MinifyScript extends Maintenance {
        var $outDir;

        public function __construct() {
                parent::__construct();
                $this->addOption( 'outfile',
                        'File for output. Only a single file may be specified for input.',
                        false, true );
                $this->addOption( 'outdir',
                        "Directory for output. If this is not specified, and neither is --outfile, then the\n" .
                        "output files will be sent to the same directories as the input files.",
                        false, true );
                $this->addOption( 'js-statements-on-own-line',
                        "Boolean value for putting statements on their own line when minifying JavaScript.",
                        false, true );
                $this->addOption( 'js-max-line-length',
                        "Maximum line length for JavaScript minification.",
                        false, true );
                $this->mDescription = "Minify a file or set of files.\n\n" .
                        "If --outfile is not specified, then the output file names will have a .min extension\n" .
                        "added, e.g. jquery.js -> jquery.min.js.";

        }

        public function execute() {
                if ( !count( $this->mArgs ) ) {
                        $this->error( "minify.php: At least one input file must be specified." );
                        exit( 1 );
                }

                if ( $this->hasOption( 'outfile' ) ) {
                        if ( count( $this->mArgs ) > 1 ) {
                                $this->error( '--outfile may only be used with a single input file.' );
                                exit( 1 );
                        }

                        // Minify one file
                        $this->minify( $this->getArg( 0 ), $this->getOption( 'outfile' ) );
                        return;
                }

                $outDir = $this->getOption( 'outdir', false );

                foreach ( $this->mArgs as $arg ) {
                        $inPath = realpath( $arg );
                        $inName = basename( $inPath );
                        $inDir = dirname( $inPath );

                        if ( strpos( $inName, '.min.' ) !== false ) {
                                $this->error( "Skipping $inName\n" );
                                continue;
                        }

                        if ( !file_exists( $inPath ) ) {
                                $this->error( "File does not exist: $arg", true );
                        }

                        $extension = $this->getExtension( $inName );
                        $outName = substr( $inName, 0, -strlen( $extension ) ) . 'min.' . $extension;
                        if ( $outDir === false ) {
                                $outPath = $inDir . '/' . $outName;
                        } else {
                                $outPath = $outDir . '/' . $outName;
                        }

                        $this->minify( $inPath, $outPath );
                }
        }

        public function getExtension( $fileName ) {
                $dotPos = strrpos( $fileName, '.' );
                if ( $dotPos === false ) {
                        $this->error( "No file extension, cannot determine type: $fileName" );
                        exit( 1 );
                }
                return substr( $fileName, $dotPos + 1 );
        }

        public function minify( $inPath, $outPath ) {
                global $wgResourceLoaderMinifierStatementsOnOwnLine, $wgResourceLoaderMinifierMaxLineLength;

                $extension = $this->getExtension( $inPath );
                $this->output( basename( $inPath ) . ' -> ' . basename( $outPath ) . '...' );

                $inText = file_get_contents( $inPath );
                if ( $inText === false ) {
                        $this->error( "Unable to open file $inPath for reading." );
                        exit( 1 );
                }
                $outFile = fopen( $outPath, 'w' );
                if ( !$outFile ) {
                        $this->error( "Unable to open file $outPath for writing." );
                        exit( 1 );
                }

                switch ( $extension ) {
                        case 'js':
                                $outText = JavaScriptMinifier::minify( $inText,
                                        $this->getOption( 'js-statements-on-own-line', $wgResourceLoaderMinifierStatementsOnOwnLine ),
                                        $this->getOption( 'js-max-line-length', $wgResourceLoaderMinifierMaxLineLength )
                                );
                                break;
                        case 'css':
                                $outText = CSSMin::minify( $inText );
                                break;
                        default:
                                $this->error( "No minifier defined for extension \"$extension\"" );
                }

                fwrite( $outFile, $outText );
                fclose( $outFile );
                $this->output( " ok\n" );
        }
}

$maintClass = 'MinifyScript';
require_once( RUN_MAINTENANCE_IF_MAIN );