new build system

.gitignore

@@ -1,4 +1,4 @@
 node_modules
-lib
+dist
 test.mjs
 .eslintcache

LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2018 engine262 Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.

package.json

@@ -2,12 +2,11 @@
   "name": "engine262",
   "version": "0.0.1",
   "description": "Implementation of ECMA-262 in JavaScript",
-  "main": "lib/api.mjs",
+  "main": "dist/engine262",
   "dependencies": {
     "acorn": "^6.0.2"
   },
   "devDependencies": {
-    "@babel/cli": "^7.1.2",
     "@babel/core": "^7.1.2",
     "@babel/plugin-syntax-object-rest-spread": "^7.0.0",
     "babel-eslint": "^10.0.1",
@@ -17,14 +16,16 @@
     "eslint-plugin-jsx-a11y": "^6.1.1",
     "eslint-plugin-react": "^7.10.0",
     "glob": "^7.1.3",
+    "rollup": "^0.66.6",
+    "rollup-plugin-babel": "^4.0.3",
     "source-map-support": "^0.5.9",
     "yaml": "^1.0.0-rc.8"
   },
   "scripts": {
     "test": "node --experimental-modules test/test262.mjs",
-    "lint": "eslint transform.js transform_do.js test/test262.mjs src/ --ext=js,mjs --cache",
-    "build": "babel src -d lib --keep-file-extension --source-maps --plugins=@babel/plugin-syntax-object-rest-spread,./transform.js",
-    "build-do": "babel src -d lib --keep-file-extension --source-maps --plugins=@babel/plugin-syntax-object-rest-spread,./transform_do.js"
+    "lint": "eslint transform.js transform_do.js build.js test/test262.mjs src/ --ext=js,mjs --cache",
+    "build": "rollup -c",
+    "build-do": "rollup -c --environment USE_DO_EXPRESSIONS"
   },
   "repository": {
     "type": "git",

rollup.config.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const fs = require('fs');
+const babel = require('rollup-plugin-babel');
+const { name, version } = require('./package.json');
+
+const banner = `/*
+ * engine262 ${version}
+ *
+ * ${fs.readFileSync('./LICENSE', 'utf8').trim().split('\n').join('\n * ')}
+ */
+`;
+
+module.exports = () => ({
+  input: './src/api.mjs',
+  plugins: [
+    babel({
+      exclude: 'node_modules/**',
+      plugins: [
+        '@babel/plugin-syntax-object-rest-spread',
+        process.env.USE_DO_EXPRESSIONS ? './transform_do.js' : './transform.js',
+      ],
+    }),
+  ],
+  output: [
+    {
+      file: 'dist/engine262.js',
+      format: 'umd',
+      sourcemap: true,
+      name,
+      banner,
+    }, {
+      file: 'dist/engine262.mjs',
+      format: 'es',
+      sourcemap: true,
+      banner,
+    },
+  ],
+});

src/api.mjs

@@ -49,7 +49,7 @@ class APIRealm {
         if (global.$262 && global.$262.handlePrint) {
           global.$262.handlePrint(...args);
         } else {
-          console.log(...args.map((a) => inspect(a))); // eslint-disable-line no-console
+          console.log(...args.map((a) => Inspect(a))); // eslint-disable-line no-console
         }
         return Value.undefined;
       }, [], realm),
@@ -144,7 +144,7 @@ export {
   APIObject as Object,
 };
 
-export function inspect(value, realm = surroundingAgent.currentRealmRecord, quote = true, indent = 0) {
+export function Inspect(value, realm = surroundingAgent.currentRealmRecord, quote = true, indent = 0) {
   const type = Type(value);
   if (type === 'Undefined') {
     return 'undefined';
@@ -181,7 +181,7 @@ export function inspect(value, realm = surroundingAgent.currentRealmRecord, quot
       indent += 1;
       for (const key of keys) {
         const C = value.properties.get(key);
-        out = `${out}\n${'  '.repeat(indent)}${inspect(key, realm, false, indent)}: ${inspect(C.Value, realm, false, indent)},`;
+        out = `${out}\n${'  '.repeat(indent)}${Inspect(key, realm, false, indent)}: ${Inspect(C.Value, realm, false, indent)},`;
       }
       indent -= 1;
       return `${out}\n${'  '.repeat(indent)}${isArray ? ']' : '}'}`;

src/completion.mjs

@@ -94,14 +94,8 @@ export function UpdateEmpty(completionRecord, value) {
 }
 
 // #sec-returnifabrupt
-export function ReturnIfAbrupt(argument) {
-  if (argument instanceof AbruptCompletion) {
-    return argument;
-  }
-  if (argument instanceof Completion) {
-    return argument.Value;
-  }
-  return argument;
+export function ReturnIfAbrupt() {
+  throw new TypeError('ReturnIfAbrupt requires build');
 }
 
 // #sec-returnifabrupt-shorthands ? OperationName()
@@ -117,16 +111,8 @@ export function X(val) {
 }
 
 // #sec-ifabruptrejectpromise
-export function IfAbruptRejectPromise(value, capability) {
-  if (value instanceof AbruptCompletion) {
-    const hygenicTemp = Call(capability.Reject, Value.undefined, [value.Value]);
-    if (hygenicTemp instanceof AbruptCompletion) {
-      return hygenicTemp;
-    }
-    return capability.Promise;
-  } else if (value instanceof Completion) {
-    value = value.Value;
-  }
+export function IfAbruptRejectPromise() {
+  throw new TypeError('IfAbruptRejectPromise requires build');
 }
 
 export function EnsureCompletion(val) {

test/test262.mjs

@@ -11,8 +11,8 @@ import {
   Abstract,
   Completion,
   AbruptCompletion,
-  inspect,
-} from '../lib/api.mjs';
+  Inspect,
+} from '..';
 
 util.inspect.defaultOptions.depth = 2;
 
@@ -103,7 +103,7 @@ async function run({ source, meta, strict }) {
     if (meta.negative) {
       return { status: PASS };
     } else {
-      return { status: FAIL, error: inspect(completion.Value, $262.realm.realm) };
+      return { status: FAIL, error: Inspect(completion.Value, $262.realm.realm) };
     }
   }