minify.php

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<?php
use Wikimedia\AtEase\AtEase;
 
require_once __DIR__ . '/Maintenance.php';
 
class MinifyScript extends Maintenance {
    public $outDir;
 
    public function __construct() {
        parent::__construct();
        $this->addOption( 'outfile',
            'Write minified output to this file (instead of standard out).',
            false, true, 'o'
        );
        $this->addOption( 'type',
            'Override the input type (one of "js" or "css"). Defaults to file extension. ' .
                'Required if reading from standard input.',
            false, true, 'o'
        );
        $this->addArg( 'file', 'Input file. Use - to read from standard input.' );
        $this->addDescription(
            "Minify one or more JavaScript or CSS files.\n" .
                "If multiple input files are given, they will be concatenated."
        );
    }
 
    public function execute() {
        $outputFile = $this->getOption( 'outfile', false );
        if ( $outputFile === false ) {
            // Only output the minified result (or errors)
            // Avoid output() because this should not honour --quiet
            foreach ( $this->mArgs as $arg ) {
                print $this->minify( $arg ) . "\n";
            }
        } else {
            $result = '';
            foreach ( $this->mArgs as $arg ) {
                $this->output( "Minifying {$arg} ...\n" );
                $result .= $this->minify( $arg );
            }
            $this->output( "Writing to {$outputFile} ...\n" );
            file_put_contents( $outputFile, $result );
            $this->output( "Done!\n" );
        }
    }
 
    public function getExtension( $fileName ) {
        $dotPos = strrpos( $fileName, '.' );
        if ( $dotPos === false ) {
            $this->fatalError( "Unknown file type ($fileName). Use --type." );
        }
        return substr( $fileName, $dotPos + 1 );
    }
 
    private function readFile( $fileName ) {
        if ( $fileName === '-' ) {
            $inText = $this->getStdin( self::STDIN_ALL );
        } else {
            AtEase::suppressWarnings();
            $inText = file_get_contents( $fileName );
            AtEase::restoreWarnings();
            if ( $inText === false ) {
                $this->fatalError( "Unable to open file $fileName for reading." );
            }
        }
        return $inText;
    }
 
    public function minify( $inPath ) {
        $extension = $this->getOption( 'type', null ) ?? $this->getExtension( $inPath );
        $inText = $this->readFile( $inPath );
 
        switch ( $extension ) {
            case 'js':
                $outText = JavaScriptMinifier::minify( $inText );
                break;
            case 'css':
                $outText = CSSMin::minify( $inText );
                break;
            default:
                $this->fatalError( "Unsupported file type \"$extension\"." );
        }
 
        return $outText;
    }
}
 
$maintClass = MinifyScript::class;
require_once RUN_MAINTENANCE_IF_MAIN;