Merge pull request #31 from MatAtBread/6.1.3-spec-option

6.1.3 spec option

Author: matAtWork

README.md

@@ -57,6 +57,19 @@ With options:
 }
 ```
 
+The option `spec` sets the compiler up to produce the most spec-compatible output (at the expense of some performance) by using the `wrapAwait`, `noRuntime` and `promises` options. Since `noRuntime` is specified, no runtime options are required.
+
+```js
+{
+  "plugins": [
+    ["fast-async", {
+      "spec":true
+    }]
+  ]
+}
+```
+
+
 Test
 ----
 From the installation directory (e.g. node_modules/fast-async):

package.json

@@ -1,8 +1,8 @@
 {
   "name": "fast-async",
-  "version": "6.1.2",
+  "version": "6.2.0",
   "dependencies": {
-    "nodent": ">=2.6.12"
+    "nodent": ">=3.0.8"
   },
   "description": "fast-async/await transformer Babel plugin",
   "main": "plugin.js",

plugin.js

@@ -58,9 +58,18 @@ module.exports = function (babel) {
                     compiler = nodent(envOpts);
                     compilerOpts = compiler.parseCompilerOptions('"use nodent-promises";', compiler.log);
 
-                    if (state.opts.compiler && typeof state.opts.compiler==="object") {
-                        Object.keys(state.opts.compiler).forEach(function(k){
-                            compilerOpts[k] = state.opts.compiler[k] ;
+                    var defCompilerOpts = state.opts.compiler ;
+                    if (state.opts.spec) {
+                        defCompilerOpts = {
+                            promises:true,
+                            wrapAwait:true,
+                            noRuntime:true
+                        }                        
+                    }
+
+                    if (defCompilerOpts && typeof defCompilerOpts==="object") {
+                        Object.keys(defCompilerOpts).forEach(function(k){
+                            compilerOpts[k] = defCompilerOpts[k] ;
                         }) ;
                     }
                     compilerOpts.babelTree = true;

tests/package.json

@@ -22,8 +22,7 @@
       [
         "..",
         {
-          "runtimePattern": "test-input\\.js",
-          "useRuntimeModule": true
+          "spec":true
         }
       ]
     ]

tests/test-cli.sh

@@ -0,0 +1 @@
+node node_modules/babel-cli/bin/babel.js test-input.js

tests/test.js

@@ -25,13 +25,16 @@ try {
 console.log("\nNB:The timings here are only indicative. GC and poor sampling generate variable results. More detailed performance tests can be found in "+"nodent".cyan+"\nStarting tests...");
 
 var nodent = require('nodent') ;
-global.Promise = global.Promise || nodent.EagerThenable() ;
+var systemPromise = global.Promise || nodent.EagerThenable() ;
+
+global.Promise = nodent.EagerThenable() ;
 
 var testCode = require('fs').readFileSync(__dirname+'/test-input.js').toString() ;
 
 var eagerName = 'fast-async (nodent-'+nodent.EagerThenable().name+')' ; 
 var transformers = {
-  'fast-async (es7-lazy)':  {plugins:[[require('../plugin.js'),{runtimePatten:'directive',compiler:{promises:false,es7:true,lazyThenables:true}}]]},
+    'fast-async (es7-lazy)':  {plugins:[[require('../plugin.js'),{runtimePatten:'directive',compiler:{promises:false,es7:true,lazyThenables:true}}]]},
+    'fast-async (spec:true)':  {plugins:[[require('../plugin.js'),{runtimePatten:null,compiler:{promises:true,es7:true,noRuntime:true,wrapAwait:true}}]]},
 };
 transformers[eagerName] = {plugins:[[require('../plugin.js'),{runtimePatten:'directive',compiler:{promises:false,es7:true,lazyThenables:false}}]]} ;
 
@@ -78,6 +81,7 @@ function loadRegenerator(){
   } catch (path) {
     global.regeneratorRuntime = require("./"+path);
     console.log("Loaded regenerator runtime from "+path+" ",regeneratorRuntime.toString().yellow) ;
+    global.Promise = systemPromise ;
   }
 }