parse.php

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<?php
require_once( __DIR__ . '/Maintenance.php' );

class CLIParser extends Maintenance {
        protected $parser;

        public function __construct() {
                parent::__construct();
                $this->mDescription = "Parse a given wikitext";
                $this->addOption( 'title', 'Title name for the given wikitext (Default: \'CLIParser\')', false, true );
                $this->addArg( 'file', 'File containing wikitext (Default: stdin)', false );
        }

        public function execute() {
                $this->initParser();
                print $this->render( $this->WikiText() );
        }

        public function render( $wikitext ) {
                return $this->parse( $wikitext )->getText();
        }

        protected function Wikitext() {

                $php_stdin  = 'php://stdin';
                $input_file = $this->getArg( 0, $php_stdin );

                if( $input_file === $php_stdin ) {
                        $ctrl = wfIsWindows() ? 'CTRL+Z' : 'CTRL+D';
                        $this->error( basename(__FILE__) .": warning: reading wikitext from STDIN. Press $ctrl to parse.\n" );
                }

                return file_get_contents( $input_file );
        }

        protected function initParser() {
                global $wgParserConf;
                $parserClass = $wgParserConf['class'];
                $this->parser = new $parserClass();
        }

        protected function getTitle( ) {
                $title =
                        $this->getOption( 'title' )
                        ? $this->getOption( 'title' )
                        : 'CLIParser' ;
                return Title::newFromText( $title );
        }

        protected function parse( $wikitext ) {
                return $this->parser->parse(
                        $wikitext
                        , $this->getTitle()
                        , new ParserOptions()
                );
        }
}

$maintClass = "CLIParser";
require_once( RUN_MAINTENANCE_IF_MAIN );