nodent.js

#!/usr/bin/env node

'use strict';
/**
 * NoDent - Asynchronous JavaScript Language extensions for Node
 *
 * AST transforms and node loader extension
 */
var stdJSLoader ;
var fs = require('fs') ;
var NodentCompiler = require('nodent-compiler') ;

// Config options used to control the run-time behaviour of the compiler
var config = {
	log:function(msg){ console.warn("Nodent: "+msg) },		// Where to print errors and warnings
	augmentObject:false,									// Only one has to say 'yes'
	extension:'.njs',										// The 'default' extension
	dontMapStackTraces:false,								// Only one has to say 'no'
	asyncStackTrace:false,
	babelTree:false,
	dontInstallRequireHook:false
} ;

// Code generation options, which are determined by the "use nodent"; directive. Specifically,
// the (optional) portion as in "use nodent<-option-set>"; is used to select a compilation
// behaviour on a file-by-file basis. There are preset option sets called "es7", "promise(s)"
// and "generators" (which cannot be over-written). Others can be specified via the
// 'setCompileOptions(name,options)' call, or via the 'nodent:{directive:{'name':{...}}}' entry in the
// current project's package.json. In the latter's case, the name 'default' is also reserved and
// is used for a bare 'use nodent' driective with no project-specific extension.
// Finally, the 'use nodent' directive can be followed by a JSON encoded set of options, for example:
//		'use nodent-es7 {"wrapAwait":true}';
//		'use nodent {"wrapAwait":true,"promise":true}';
//		'use nodent-generators {"parser":{"sourceType":"module"}}';
//
// The order of application of these options is:
//		initialCodeGenOpts (hard-coded)
//		named by the 'use nodent-OPTION', as read from the package.json
//		named by the 'use nodent-OPTION', as set by the setCompileOptions (or setDefaultCompileOptions)
//		set within the directive as a JSON-encoded extension

function copyObj(a){
	var o = {} ;
	a.forEach(function(b){
		if (b && typeof b==='object')
			for (var k in b)
				o[k] = b[k]  ;
	}) ;
	return o ;
};

var defaultCodeGenOpts = Object.create(NodentCompiler.initialCodeGenOpts, {es7:{value:true,writable:true,enumerable:true}}) ;
var optionSets = {
	default:defaultCodeGenOpts,
	es7:Object.create(defaultCodeGenOpts),
	promise:Object.create(defaultCodeGenOpts,{
		promises:{value:true,writable:true,enumerable:true}
	}),
	generator:Object.create(defaultCodeGenOpts,{
		generators:{value:true,writable:true,enumerable:true},
		es7:{value:false,writable:true,enumerable:true}
	}),
    engine:Object.create(defaultCodeGenOpts,{
        engine:{value:true,writable:true,enumerable:true},
        promises:{value:true,writable:true,enumerable:true}
    }),
    host:Object.create(defaultCodeGenOpts,{
        promises:{value:"host",writable:true,enumerable:true},
        es6target:{value:"host",writable:true,enumerable:true},
        engine:{value:"host",writable:true,enumerable:true}
    })
};
optionSets.promises = optionSets.promise ;
optionSets.generators = optionSets.generator ;

function globalErrorHandler(err) {
	throw err ;
}

/* Extract compiler options from code (either a string or AST) */
var useDirective = /^\s*['"]use\s+nodent-?([a-zA-Z0-9]*)?(\s*.*)?['"]\s*;/
var runtimes = require('nodent-runtime') ;
var $asyncbind = runtimes.$asyncbind ;
var $asyncspawn = runtimes.$asyncspawn ;
var Thenable = $asyncbind.Thenable ;

function isDirective(node){
    return node.type === 'ExpressionStatement' &&
        (node.expression.type === 'StringLiteral' ||
            (node.expression.type === 'Literal' && typeof node.expression.value === 'string')) ;
}

var hostOptions = {
    promises:"Promise",
    es6target:"()=>0",
    engine:"(async ()=>0)",
    noRuntime:"Promise"
} ;

function parseCompilerOptions(code,log,filename) {
    if (!log) log = console.warn.bind(console) ;
	var regex, set, parseOpts = {} ;
	if (typeof code=="string") {
		if (regex = code.match(useDirective)) {
			set = regex[1] || 'default' ;
		}
	} else { // code is an AST
		for (var i=0; i<code.body.length; i++) {
			if (isDirective(code.body[i].type)) {
			    var test = "'"+code.body[i].value+"'" ;
				if (regex = test.match(useDirective)) {
					set = regex[1] || 'default' ;
					break ;
				}
			} else {
			    break ; // Directives should preceed all other statements
			}
		}
	}
	if (!regex) {
	    if (!defaultCodeGenOpts.noUseDirective)
	        return null ;
	    set = "default" ;
	    regex = [null,null,"{}"] ;
	}
	if (set) {
	    try {
	        if (!filename)
	            filename = require('path').resolve('.') ;
	        else  if (!require('fs').lstatSync(filename).isDirectory())
	            filename = require('path').dirname(filename) ;

	        var packagePath = require('resolve').sync('package.json',{
	            moduleDirectory:[''],
	            extensions:[''],
	            basedir:filename
	        }) ;
	        var packageOptions = JSON.parse(fs.readFileSync(packagePath)).nodent.directive[set] ;
	    } catch(ex) {
	        // Meh
	    }
	}
	try {
		parseOpts = copyObj([optionSets[set],packageOptions,regex[2] && JSON.parse(regex[2])]);
	} catch(ex) {
		log("Invalid literal compiler option: "+((regex && regex[0]) || "<no options found>"));
	}

	Object.keys(hostOptions).forEach(function(k){
	    if (parseOpts[k] === 'host') {
	        parseOpts[k] = (function(){ try { eval(hostOptions[k]) ; return true } catch (ex) { return false } })()
	    } 
	}) ;

	if (parseOpts.promises || parseOpts.es7 || parseOpts.generators || parseOpts.engine) {
		if ((((parseOpts.promises || parseOpts.es7) && parseOpts.generators))) {
			log("No valid 'use nodent' directive, assumed -es7 mode") ;
			parseOpts = optionSets.es7 ;
		}

		if (parseOpts.generators || parseOpts.engine)
		    parseOpts.promises = true ;
		if (parseOpts.promises)
		    parseOpts.es7 = true ;
		return parseOpts ;
	}
	return null ; // No valid nodent options
}

function stripBOM(content) {
	// Remove byte order marker. This catches EF BB BF (the UTF-8 BOM)
	// because the buffer-to-string conversion in `fs.readFileSync()`
	// translates it to FEFF, the UTF-16 BOM.
	if (content.charCodeAt(0) === 0xFEFF) {
		content = content.slice(1);
	}
	if (content.substring(0,2) === "#!") {
		content = "//"+content ;
	}
	return content;
}

function compileNodentedFile(nodent,log) {
    log = log || nodent.log ;
	return function(mod, filename, parseOpts) {
		var content = stripBOM(fs.readFileSync(filename, 'utf8'));
		var pr = nodent.parse(content,filename,parseOpts);
		parseOpts = parseOpts || parseCompilerOptions(pr.ast,log, filename) ;
		nodent.asynchronize(pr,undefined,parseOpts,log) ;
		nodent.prettyPrint(pr,parseOpts) ;
		mod._compile(pr.code, pr.filename);
	}
};

// Things that DON'T depend on initOpts (or config, and therefore nodent)
function asyncify(promiseProvider) {
	promiseProvider = promiseProvider || Thenable ;
	return function(obj,filter,suffix) {
		if (Array.isArray(filter)) {
			var names = filter ;
			filter = function(k,o) {
				return names.indexOf(k)>=0 ;
			}
		} else {
			filter = filter || function(k,o) {
				return (!k.match(/Sync$/) || !(k.replace(/Sync$/,"") in o)) ;
			};
		}

		if (!suffix)
			suffix = "" ;

		var o = Object.create(obj) ;
		for (var j in o) (function(){
			var k = j ;
			try {
				var pd ;
				for (var po = obj; po; po = po.__proto__) {
					if (pd = Object.getOwnPropertyDescriptor(po,k))
						break ;
				}
				if (pd.value && typeof pd.value==='function' && (!o[k+suffix] || !o[k+suffix].isAsync) && filter(k,o)) {
					o[k+suffix] = function() {
						var a = Array.prototype.slice.call(arguments) ;
						var resolver = function($return,$error) {
							var cb = function(err,ok){
								if (err)
									return $error(err) ;
								switch (arguments.length) {
								case 0: return $return() ;
								case 2: return $return(ok) ;
								default: return $return(Array.prototype.slice.call(arguments,1)) ;
								}
							} ;
							// If more args were supplied than declared, push the CB
							if (a.length > obj[k].length) {
								a.push(cb) ;
							} else {
								// Assume the CB is the final arg
								a.push(cb) ;
							}
							var ret = obj[k].apply(obj,a) ;
						} ;
						return new promiseProvider(resolver) ;
					}
					o[k+suffix].isAsync = true ;
				}
			} catch (ex) {
				// Log the fact that we couldn't augment this member??
			}
		})() ;
		o["super"] = obj ;
		return o ;
	}
};

function generateRequestHandler(path, matchRegex, options) {
	var cache = {} ;
	var compiler = this ;

	if (!matchRegex)
		matchRegex = /\.njs$/ ;
	if (!options)
		options = {compiler:{}} ;
	else if (!options.compiler)
		options.compiler = {} ;
	var compilerOptions = copyObj([NodentCompiler.initialCodeGenOpts,options.compiler]) ;

	return function (req, res, next) {
		if (req.url.indexOf('..')>=0)
			return next() ;
		
		if (cache[req.url]) {
			res.setHeader("Content-Type", cache[req.url].contentType);
			options.setHeaders && options.setHeaders(res) ;
			res.write(cache[req.url].output) ;
			res.end();
			return ;
		}

		if (!req.url.match(matchRegex) && !(options.htmlScriptRegex && req.url.match(options.htmlScriptRegex))) {
			return next && next() ;
		}

		function sendException(ex) {
			res.statusCode = 500 ;
			res.write(ex.toString()) ;
			res.end() ;
		}

		var filename = path+req.url ;
		if (options.extensions && !fs.existsSync(filename)) {
			for (var i=0; i<options.extensions.length; i++) {
				if (fs.existsSync(filename+"."+options.extensions[i])) {
					filename = filename+"."+options.extensions[i] ;
					break ;
				}
			}
		}
		fs.readFile(filename,function(err,content){
			if (err) {
				return sendException(err) ;
			} else {
				try {
					var pr,contentType ;
					if (options.htmlScriptRegex && req.url.match(options.htmlScriptRegex)) {
						pr = require('./htmlScriptParser')(compiler,content.toString(),req.url,options) ;
						contentType = "text/html" ;
					} else {
						if (options.runtime) {
							pr = "Function.prototype."+compilerOptions.$asyncbind+" = "+$asyncbind.toString()+";" ;
							if (compilerOptions.generators)
								pr += "Function.prototype."+compilerOptions.$asyncspawn+" = "+$asyncspawn.toString()+";" ;
							if (compilerOptions.wrapAwait && !compilerOptions.promises)
								pr += "Object."+compilerOptions.$makeThenable+" = "+Thenable.resolve.toString()+";" ;
							compilerOptions.mapStartLine = pr.split("\n").length ;
							pr += "\n";
						} else {
							pr = "" ;
						}
						pr += compiler.compile(content.toString(),req.url,null,compilerOptions).code;
						contentType = "application/javascript" ;
					}
					res.setHeader("Content-Type", contentType);
					if (options.enableCache)
						cache[req.url] = {output:pr,contentType:contentType} ;
					options.setHeaders && options.setHeaders(res) ;
					res.write(pr) ;
					res.end();
				} catch (ex) {
					return sendException(ex) ;
				}
			}
		}) ;
	};
};

function requireCover(cover,opts) {
    opts = opts || {} ;
    var key = cover+'|'+Object.keys(opts).sort().reduce(function(a,k){ return a+k+JSON.stringify(opts[k])},"") ;
    if (!this.covers[key]) {
        if (cover.indexOf("/")>=0)
            this.covers[key] = require(cover) ;
        else
            this.covers[key] = require(__dirname+"/covers/"+cover);
    }
    return this.covers[key](this,opts) ;
}

NodentCompiler.prototype.Thenable = Thenable ;
NodentCompiler.prototype.EagerThenable = $asyncbind.EagerThenableFactory ;
NodentCompiler.prototype.asyncify =  asyncify ;
NodentCompiler.prototype.require =  requireCover ;
NodentCompiler.prototype.generateRequestHandler = generateRequestHandler ;
// Exported so they can be transported to a client
NodentCompiler.prototype.$asyncspawn =  $asyncspawn ;
NodentCompiler.prototype.$asyncbind =  $asyncbind ;
NodentCompiler.prototype.parseCompilerOptions =  parseCompilerOptions ;

$asyncbind.call($asyncbind) ;

function prepareMappedStackTrace(error, stack) {
	function mappedTrace(frame) {
		var source = frame.getFileName();
		if (source && NodentCompiler.prototype.smCache[source]) {
			var position = NodentCompiler.prototype.smCache[source].smc.originalPositionFor({
				line: frame.getLineNumber(),
				column: frame.getColumnNumber()
			});
			if (position && position.line) {
				var desc = frame.toString() ;
				return '\n    at '
					+ desc.substring(0,desc.length-1)
					+ " => \u2026"+position.source+":"+position.line+":"+position.column
					+ (frame.getFunctionName()?")":"");
			}
		}
		return '\n    at '+frame;
	}
	return error + stack.map(mappedTrace).join('');
}

// Set the 'global' references to the (backward-compatible) versions
// required by the current version of Nodent
function setGlobalEnvironment(initOpts) {
	var codeGenOpts = defaultCodeGenOpts ;
	/*
	Object.$makeThenable
	Object.prototype.isThenable
	Object.prototype.asyncify
	Function.prototype.noDentify // Moved to a cover as of v3.0.0
	Function.prototype.$asyncspawn
	Function.prototype.$asyncbind
	Error.prepareStackTrace
	global[defaultCodeGenOpts.$error]
	*/

	var augmentFunction = {} ;
	augmentFunction[defaultCodeGenOpts.$asyncbind] = {
		value:$asyncbind,
		writable:true,
		enumerable:false,
		configurable:true
	};
	augmentFunction[defaultCodeGenOpts.$asyncspawn] = {
		value:$asyncspawn,
		writable:true,
		enumerable:false,
		configurable:true
	};
	try {
	    Object.defineProperties(Function.prototype,augmentFunction) ;
	} catch (ex) {
	    initOpts.log("Function prototypes already assigned: ",ex.messsage) ;
	}

	/**
	 * We need a global to handle funcbacks for which no error handler has ever been defined.
	 */
	if (!(defaultCodeGenOpts[defaultCodeGenOpts.$error] in global)) {
		global[defaultCodeGenOpts[defaultCodeGenOpts.$error]] = globalErrorHandler ;
	}

	// "Global" options:
	// If anyone wants to augment Object, do it. The augmentation does not depend on the config options
	if (initOpts.augmentObject) {
		Object.defineProperties(Object.prototype,{
			"asyncify":{
				value:function(promiseProvider,filter,suffix){
					return asyncify(promiseProvider)(this,filter,suffix)
				},
				writable:true,
				configurable:true
			},
			"isThenable":{
				value:function(){ return Thenable.isThenable(this) },
				writable:true,
				configurable:true
			}
		}) ;
	}

	Object[defaultCodeGenOpts.$makeThenable] = Thenable.resolve ;
}

/* Construct a 'nodent' object - combining logic and options */
var compiler ;
function initialize(initOpts){
	// Validate the options
/* initOpts:{
 * 		log:function(msg),
 * 		augmentObject:boolean,
 * 		extension:string?
 * 		dontMapStackTraces:boolean
 */
	if (!initOpts)
		initOpts = {} ;
	else {
		// Throw an error for any options we don't know about
		for (var k in initOpts) {
			if (k==="use")
				continue ; // deprecated
			if (!config.hasOwnProperty(k))
				throw new Error("NoDent: unknown option: "+k+"="+JSON.stringify(initOpts[k])) ;
		}
	}


	if (compiler) {
		compiler.setOptions(initOpts);
	} else {
		// Fill in any missing options with their default values
		Object.keys(config).forEach(function(k){
			if (!(k in initOpts))
				initOpts[k] = config[k] ;
		}) ;
		compiler = new NodentCompiler(initOpts) ;
	}

	// If anyone wants to mapStackTraces, do it. The augmentation does not depend on the config options
	if (!initOpts.dontMapStackTraces) {
		// This function is part of the V8 stack trace API, for more info see:
		// http://code.google.com/p/v8/wiki/JavaScriptStackTraceApi
		Error.prepareStackTrace = prepareMappedStackTrace ;
	}

	setGlobalEnvironment(initOpts) ;

	/* If we've not done it before, create a compiler for '.js' scripts */
	// Create a new compiler

	var nodentLoaders = [];
	function compareSemVer(a,b) {
		a = a.split('.') ;
		b = b.split('.') ;
		for (var i=0;i<3;i++) {
			if (a[i]<b[i]) return -1 ;
			if (a[i]>b[i]) return 1 ;
		}
		return 0 ;
	}

    function versionAwareNodentJSLoader(mod,filename) {
        if (filename.match(/nodent\/nodent\.js$/)) {
            var downLevel = {path:filename.replace(/\/node_modules\/nodent\/nodent\.js$/,"")} ;
            if (downLevel.path) {
                downLevel.version = JSON.parse(fs.readFileSync(filename.replace(/nodent\.js$/,"package.json"))).version ;
                // Load the specified nodent
                stdJSLoader(mod,filename) ;

                // If the version of nodent we've just loaded is lower than the
                // current (version-aware) version, hook the initialzer
                // so we can replace the JS loader after it's been run.
                if (compareSemVer(downLevel.version,NodentCompiler.prototype.version)<0) {
                    downLevel.originalNodentLoader = mod.exports ;
                    mod.exports = function(){
                        var previousJSLoader = require.extensions['.js'] ;
                        var defaultNodentInstance = downLevel.originalNodentLoader.apply(this,arguments) ;
                        downLevel.jsCompiler = require.extensions['.js'] ;
                        require.extensions['.js'] = previousJSLoader ;
                        setGlobalEnvironment(initOpts) ;
                        return defaultNodentInstance ;
                    } ;
                    Object.keys(downLevel.originalNodentLoader).forEach(function(k){
                        mod.exports[k] = downLevel.originalNodentLoader[k] ;
                    }) ;
                    nodentLoaders.push(downLevel) ;
                    nodentLoaders = nodentLoaders.sort(function(a,b){
                        return b.path.length - a.path.length ;
                    }) ;
                }
            }
        } else if (filename.match(/node_modules\/nodent\/.*\.js$/)) {
            // Things inside nodent always use the standard loader
            return stdJSLoader(mod,filename) ;
        } else {
            // The the appropriate loader for this file
            for (var n=0; n<nodentLoaders.length; n++) {
                if (filename.slice(0,nodentLoaders[n].path.length)==nodentLoaders[n].path) {
                    //console.log("Using nodent@",nodentLoaders[n].version,"to load",filename) ;
                    if (!nodentLoaders[n].jsCompiler) {
                        // The client app loaded, but never initialised nodent (so it can only
                        // be using library/runtime functions, not the require-hook compiler)
                        return stdJSLoader(mod,filename) ;
                    } else {
                        if (nodentLoaders[n].jsCompiler === versionAwareNodentJSLoader)
                            break ;
                        return nodentLoaders[n].jsCompiler.apply(this,arguments) ;
                    }
                }
            }

            var content = stripBOM(fs.readFileSync(filename, 'utf8'));
            var parseOpts = parseCompilerOptions(content,initOpts.log,filename) ;
            if (parseOpts) {
                return stdCompiler(mod,filename,parseOpts) ;
            }
            return stdJSLoader(mod,filename) ;
        }
    }

    function registerExtension(extension) {
        if (Array.isArray(extension))
            return extension.forEach(registerExtension) ;

        if (require.extensions[extension]) {
            var changedKeys = Object.keys(initOpts).filter(function(k){ return compiler[k] != initOpts[k]}) ;
            if (changedKeys.length) {
                initOpts.log("File extension "+extension+" already configured for async/await compilation.") ;
            }
        }
    	require.extensions[extension] = compileNodentedFile(compiler,initOpts.log) ;
    }

    if (!initOpts.dontInstallRequireHook) {
		if (!stdJSLoader) {
			stdJSLoader = require.extensions['.js'] ;
			var stdCompiler = compileNodentedFile(compiler,initOpts.log) ;
			require.extensions['.js'] = versionAwareNodentJSLoader ;
		}

		/* If the initOpts specified a file extension, use this compiler for it */
		if (initOpts.extension) {
			registerExtension(initOpts.extension) ;
		}
	}

	// Finally, load any required covers
	if (initOpts.use) {
		if (Array.isArray(initOpts.use)) {
			initOpts.log("Warning: nodent({use:[...]}) is deprecated. Use nodent.require(module,options)\n"+(new Error().stack).split("\n")[2]);
			if (initOpts.use.length) {
				initOpts.use.forEach(function(x){
					compiler[x] = compiler.require(x) ;
				}) ;
			}
		} else {
			initOpts.log("Warning: nodent({use:{...}}) is deprecated. Use nodent.require(module,options)\n"+(new Error().stack).split("\n")[2]);
			Object.keys(initOpts.use).forEach(function(x){
				compiler[x] = compiler.require(x,initOpts.use[x])
			}) ;
		}
	}
	return compiler ;
} ;

/* Export these so that we have the opportunity to set the options for the default .js parser */
initialize.setDefaultCompileOptions = function(compiler,env) {
	if (compiler) {
		Object.keys(compiler).forEach(function(k){
			if (!(k in defaultCodeGenOpts))
				throw new Error("NoDent: unknown compiler option: "+k) ;
			defaultCodeGenOpts[k] = compiler[k] ;
		}) ;
	}

	env && Object.keys(env).forEach(function(k){
		if (!(k in env))
			throw new Error("NoDent: unknown configuration option: "+k) ;
		config[k] = env[k] ;
	}) ;
	return initialize ;
};

initialize.setCompileOptions = function(set,compiler) {
	optionSet[set] = optionSet[set] || copyObj([defaultCodeGenOpts]);
	compiler && Object.keys(compiler).forEach(function(k){
		if (!(k in defaultCodeGenOpts))
			throw new Error("NoDent: unknown compiler option: "+k) ;
		optionSet[set][k] = compiler[k] ;
	}) ;
	return initialize ;
};

initialize.asyncify = asyncify ;
initialize.Thenable = $asyncbind.Thenable ;
initialize.EagerThenable = $asyncbind.EagerThenableFactory ;

module.exports = initialize ;

function runFromCLI(){
    function readStream(stream) {
        return new Thenable(function ($return, $error) {
            var buffer = [] ;
            stream.on('data',function(data){
                buffer.push(data)
            }) ;
            stream.on('end',function(){
                var code = buffer.map(function(b){ return b.toString()}).join("") ;
                return $return(code);
            }) ;
            stream.on('error',$error) ;
        }.$asyncbind(this));
    }

    function getCLIOpts(start) {
        var o = [] ;
        for (var i=start || 2; i<process.argv.length; i++) {
            if (process.argv[i].slice(0,2)==='--') {
                var opt = process.argv[i].slice(2).split('=') ;
                o[opt[0]] = opt[1] || true ;
            }
            else
                o.push(process.argv[i]) ;
        }
        return o ;
    }

    function processInput(content,name){
        try {
            var pr ;
            var parseOpts ;

            // Input options
            if (cli.fromast) {
                content = JSON.parse(content) ;
                pr = { origCode:"", filename:filename, ast: content } ;
                parseOpts = parseCompilerOptions(content,nodent.log) ;
                if (!parseOpts) {
                    var directive = cli.use ? '"use nodent-'+cli.use+'";' : '"use nodent";' ;
                    parseOpts = parseCompilerOptions(directive,nodent.log) ;
                    console.warn("/* "+filename+": No 'use nodent*' directive, assumed "+directive+" */") ;
                }
            } else {
                parseOpts = parseCompilerOptions(cli.use?'"use nodent-'+cli.use+'";':content,nodent.log) ;
                if (!parseOpts) {
                    parseOpts = parseCompilerOptions('"use nodent";',nodent.log) ;
                    if (!cli.dest)
                        console.warn("/* "+filename+": 'use nodent*' directive missing/ignored, assumed 'use nodent;' */") ;
                }
                pr = nodent.parse(content,filename,parseOpts);
            }

            // Processing options
            if (!cli.parseast && !cli.pretty)
                nodent.asynchronize(pr,undefined,parseOpts,nodent.log) ;

            // Output options
            nodent.prettyPrint(pr,parseOpts) ;
            if (cli.out || cli.pretty || cli.dest) {
                if (cli.dest && !name)
                    throw new Error("Can't write unknown file to "+cli.dest) ;

                var output = "" ;
                if (cli.runtime) {
                    output += ("Function.prototype.$asyncbind = "+Function.prototype.$asyncbind.toString()+";\n") ;
                    output += ("global.$error = global.$error || "+global.$error.toString()+";\n") ;
                }
                output += pr.code ;
                if (name && cli.dest) {
                    fs.writeFileSync(cli.dest+name,output) ;
                    console.log("Compiled",cli.dest+name) ;
                } else {
                    console.log(output);
                }
            }
            if (cli.minast || cli.parseast) {
                console.log(JSON.stringify(pr.ast,function(key,value){
                    return key[0]==="$" || key.match(/^(start|end|loc)$/)?undefined:value
                },2,null)) ;
            }
            if (cli.ast) {
                console.log(JSON.stringify(pr.ast,function(key,value){ return key[0]==="$"?undefined:value},0)) ;
            }
            if (cli.exec) {
                (new Function(pr.code))() ;
            }
        } catch (ex) {
            console.error(ex) ;
        }
    }

	var path = require('path') ;
	var initOpts = (process.env.NODENT_OPTS && JSON.parse(process.env.NODENT_OPTS)) || {};
	var filename, cli = getCLIOpts() ;
	initialize.setDefaultCompileOptions({
		sourcemap:cli.sourcemap,
        wrapAwait:cli.wrapAwait,
        lazyThenables:cli.lazyThenables,
        noRuntime:cli.noruntime,
        es6target:cli.es6target,
        parser:cli.noextensions?{noNodentExtensions:true}:undefined
	});

	var nodent = initialize({
		augmentObject:true
	}) ;

	if (!cli.fromast && !cli.parseast && !cli.pretty && !cli.out && !cli.dest && !cli.ast && !cli.minast && !cli.exec) {
		// No input/output options - just require the
		// specified module now we've initialized nodent
		try {
			var mod = path.resolve(cli[0]) ;
			return require(mod);
		} catch (ex) {
			ex && (ex.message = cli[0]+": "+ex.message) ;
			throw ex ;
		}
	}

	if (cli.length==0 || cli[0]==='-') {
		filename = "(stdin)" ;
		return readStream(process.stdin).then(processInput,globalErrorHandler) ;
	} else {
	    for (var i=0; i<cli.length; i++) {
    		filename = path.resolve(cli[i]) ;
    		processInput(stripBOM(fs.readFileSync(filename, 'utf8')),cli[i]) ;
	    }
	    return ;
	}
}

if (require.main===module && process.argv.length>=3)
    runFromCLI() ;