module.exports = function (grunt) { var PEG = require('pegjs'); /** Full config looks like this: pegjs: { my_parser: { options: { // optional cache: true, // default: false export_var: 'smalltalk.parser' // default: module.exports }, */ grunt.registerMultiTask('peg', 'Generate JavaScript parser from PEG.js grammar description', function () { var options = this.options({ cache: false, output: 'source', export_var: 'module.exports' }); var parser = PEG.buildParser(grunt.file.read(this.data.src), options); var content = "define(['./boot'], function($boot) {\nvar $globals = $boot.globals, nil = $boot.nilAsReceiver;\n" + options.export_var + " = " + parser + ";\n});"; grunt.file.write(this.data.dest, content); }); };