v7.0.0-beta.56

In Babel 6, we had `@babel/runtime` which _always_ uses `core-js` in its helpers, meaning that anyone who wants to use our helpers in a centralized modular way had to also use core-js, which isn't always ideal.

Early in the Babel 7 alpha, we added a `useBuiltins: true` option that would use separate copies of the helpers that would skip loading `core-js`, but this _still_ requires users to have an indirect npm dependency on `core-js`.

This PR splits our setup into two separate runtimes:

* ```
  'plugins': [
    ['transform-runtime'],
  ]
  ```
  with `npm install --save @babel/runtime` that just includes our helpers, and relies on users to globally polyfill any APIs they need.
* ```
  'plugins': [
    ['transform-runtime', { corejs: 2 }],
  ]
  ```
  with `npm install --save @babel/runtime-corejs2` that includes everything `@babel/runtime` does, but also includes a passthrough API for `corejs@2.x` and rewrites all of the helper modules to reference `core-js`.

.eslintignore

@@ -4,8 +4,9 @@
 package.json
 lerna.json
 packages/babel-runtime
-!packages/babel-runtime/scripts
-!packages/babel-runtime/core-js.js
+!packages/babel-plugin-transform-runtime/scripts
+!packages/babel-runtime-corejs2/core-js.js
+packages/babel-runtime-corejs2
 packages/*/node_modules
 packages/*/lib
 packages/*/dist

.gitignore

@@ -12,24 +12,27 @@ coverage
 dist
 /.package.json
 package-lock.json
-/packages/babel-runtime/core-js/**/*.js
-!/packages/babel-runtime/core-js/map.js
+
 /packages/babel-runtime/helpers/*.js
 !/packages/babel-runtime/helpers/toArray.js
 !/packages/babel-runtime/helpers/iterableToArray.js
 !/packages/babel-runtime/helpers/temporalRef.js
-/packages/babel-runtime/helpers/builtin/*.js
-!/packages/babel-runtime/helpers/builtin/toArray.js
-!/packages/babel-runtime/helpers/builtin/iterableToArray.js
-!/packages/babel-runtime/helpers/builtin/temporalRef.js
-/packages/babel-runtime/helpers/builtin/es6/*.js
-!/packages/babel-runtime/helpers/builtin/es6/toArray.js
-!/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js
-!/packages/babel-runtime/helpers/builtin/es6/temporalRef.js
-/packages/babel-runtime/helpers/es6/*.js
-!/packages/babel-runtime/helpers/es6/toArray.js
-!/packages/babel-runtime/helpers/es6/iterableToArray.js
-!/packages/babel-runtime/helpers/es6/temporalRef.js
+/packages/babel-runtime/helpers/esm/*.js
+!/packages/babel-runtime/helpers/esm/toArray.js
+!/packages/babel-runtime/helpers/esm/iterableToArray.js
+!/packages/babel-runtime/helpers/esm/temporalRef.js
+
+/packages/babel-runtime-corejs2/helpers/*.js
+!/packages/babel-runtime-corejs2/helpers/toArray.js
+!/packages/babel-runtime-corejs2/helpers/iterableToArray.js
+!/packages/babel-runtime-corejs2/helpers/temporalRef.js
+/packages/babel-runtime-corejs2/helpers/esm/*.js
+!/packages/babel-runtime-corejs2/helpers/esm/toArray.js
+!/packages/babel-runtime-corejs2/helpers/esm/iterableToArray.js
+!/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js
+/packages/babel-runtime-corejs2/core-js/**/*.js
+!/packages/babel-runtime-corejs2/core-js/map.js
+
 /packages/babel-register/test/.babel
 /packages/babel-cli/test/tmp
 /packages/babel-node/test/tmp

CHANGELOG.md

@@ -15,6 +15,68 @@ See [CHANGELOG - v4-v6](/.github/CHANGELOG-v4-v6.md) for the v4.x-v6.x changelog
 See [CHANGELOG - 6to5](/.github/CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 See [Babylon's CHANGELOG](packages/babylon/CHANGELOG.md) for the Babylon pre-7.0.0-beta.29 version changelog.
 
+## v7.0.0-beta.54 (2018-07-16)
+
+> Regarding https://github.com/babel/babel/issues/8184, we aren't using `micromatch` for paths, just basic `*/**` substitution now. For anything more complicated we will recommend using a regex/`.js` config.
+> Fixed a bug in the stage presets (https://github.com/babel/babel/issues/8307), so we just removed the requirements for setting options in the meantime for ease of use. We are removing the Stage presets next release. https://github.com/babel/babel/pull/8293
+
+#### :boom: Breaking Change
+* `babel-core`, `babel-register`, `babel-traverse`
+  * [#8327](https://github.com/babel/babel/pull/8327) Treat string ignore/only/test/include/exclude values as paths with only basic pattern matching. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :bug: Bug Fix
+* `babel-core`, `babel-register`, `babel-traverse`
+  * [#8327](https://github.com/babel/babel/pull/8327) Treat string ignore/only/test/include/exclude values as paths with only basic pattern matching. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-preset-stage-0`, `babel-preset-stage-1`
+  * [#8317](https://github.com/babel/babel/pull/8317) Fix stage-0/1 import of pipeline proposals array. ([@mAAdhaTTah](https://github.com/mAAdhaTTah))
+* `babel-helper-module-transforms`, `babel-plugin-transform-modules-commonjs`
+  * [#8316](https://github.com/babel/babel/pull/8316) Ensure that the wildcard interop is used with re-export + default.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-core`
+  * [#8315](https://github.com/babel/babel/pull/8315) Remove option-filtering options from the final options results.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :memo: Documentation
+* [#8320](https://github.com/babel/babel/pull/8320) Add link to audio version of song. ([@rugk](https://github.com/rugk))
+
+## v7.0.0-beta.53 (2018-07-11)
+
+- Fix for regression with paths on windows due to micromatch upgrade, remove yearly presets (not published)
+- (There was an issue with the Stage presets in this release, but it is also deprecated) 
+
+#### :boom: Breaking Change
+* `babel-*`
+  * [#8274](https://github.com/babel/babel/pull/8274) Remove yearly presets from repo. ([@hzoo](https://github.com/hzoo))
+
+#### :rocket: New Feature
+* `babel-generator`, `babel-parser`, `babel-plugin-transform-typescript`, `babel-types`
+  * [#7799](https://github.com/babel/babel/pull/7799) TypeScript: Support type arguments on JSX opening and self-closing tags. ([@andy-ms](https://github.com/andy-ms))
+* `babel-parser`
+  * [#8291](https://github.com/babel/babel/pull/8291) Support pipeline proposal flag in  `@babel/parser`. ([@mAAdhaTTah](https://github.com/mAAdhaTTah))
+* `babel-plugin-proposal-object-rest-spread`
+  * [#8264](https://github.com/babel/babel/pull/8264) Remove unused bindings when excluding keys with rest in loose mode. ([@Andarist](https://github.com/Andarist))
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`, `babel-plugin-transform-destructuring`, `babel-preset-env`
+  * [#8261](https://github.com/babel/babel/pull/8261) Introduce objectWithoutPropertiesLoose helper. ([@Andarist](https://github.com/Andarist))
+
+#### :bug: Bug Fix
+* `babel-core`
+  * [#8281](https://github.com/babel/babel/pull/8281) Revert micromatch upgrade (regression) [skip ci]. ([@hzoo](https://github.com/hzoo))
+* `babel-types`
+  * [#8165](https://github.com/babel/babel/pull/8165) [babel-types] Fix isNodesEquivalent() behavior for TemplateElements. ([@timkendrick](https://github.com/timkendrick))
+
+#### :nail_care: Polish
+* `babel-plugin-syntax-pipeline-operator`, `babel-preset-stage-0`, `babel-preset-stage-1`
+  * [#8279](https://github.com/babel/babel/pull/8279) Improve error messages around pipeline option. ([@mAAdhaTTah](https://github.com/mAAdhaTTah))
+
+#### :memo: Documentation
+* [#8286](https://github.com/babel/babel/pull/8286) Move v4-v6 changelog to another file and all prerelease 7.0 logs [ski…. ([@hzoo](https://github.com/hzoo))
+
+#### :house: Internal
+* `babel-preset-env`
+  * [#8299](https://github.com/babel/babel/pull/8299) Make env preset build-data scripts reproducible. ([@rtsao](https://github.com/rtsao))
+* `babel-plugin-proposal-object-rest-spread`
+  * [#8287](https://github.com/babel/babel/pull/8287) Fixed fixture tests after merge. ([@Andarist](https://github.com/Andarist))
+* Other
+  * [#8187](https://github.com/babel/babel/pull/8187) Invoke Jest main file directly. ([@ishitatsuyuki](https://github.com/ishitatsuyuki))
+
 ## v7.0.0-beta.52 (2018-07-06)
 
 Deprecating the yearly/stage presets in v7 (will remove next beta). Ran `npm deprecate` on `@babel/preset-es2015`, `@babel/preset-es2016`, `@babel/preset-es2017`, `@babel/preset-stage-0`, `@babel/preset-stage-1`, `@babel/preset-stage-2`, `@babel/preset-stage-3` only for versions `>v7.0.0-beta.52`. This means this will only break your build if you are using `^` in Babel v7 beta (which we have recommended against each release). (It is unfortunate that the default behavior of npm is to use `^` when using `npm install` though; haven't made an RFC for it yet).

CODE_OF_CONDUCT.md

@@ -3,7 +3,7 @@
 ## Our Pledge
 
 In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
+contributors and maintainers pledge to make participation in our project and
 our community a harassment-free experience for everyone, regardless of age, body
 size, disability, ethnicity, gender identity and expression, level of experience,
 nationality, personal appearance, race, religion, or sexual identity and

CONTRIBUTING.md

@@ -186,7 +186,7 @@ For example, in [`@babel/plugin-transform-exponentiation-operator/test`](https:/
    - If you need to expect an error, you can ignore creating the `output.js` file and pass a new `throws` key to the `options.json` that contains the error string that is created.
    - The second and preferred type is a test that actually evaluates the produced code and asserts that certain properties are true or false. We do this by creating an [`exec.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/comprehensive/exec.js) file.
 
-In a fixture test, you simply write out the code you want transformed in `input.js`.
+In a fixture test, you simply write out the code you want to transform in `input.js`.
 
 ```js
 // input.js
@@ -230,7 +230,7 @@ If the test requires a minimum Node version, you can add `minNodeVersion` (must
 
 Writing tests for the babel parser is very
 similar to the other packages.
-Inside the `packages/babel-parser/tests/fixtures` folder are categories/groupings of test fixtures (es2015, flow,
+Inside the `packages/babel-parser/test/fixtures` folder are categories/groupings of test fixtures (es2015, flow,
 etc.). To add a test, create a folder under one of these groupings (or create a new one) with a
 descriptive name, and add the following:
 

Makefile

@@ -1,5 +1,5 @@
 MAKEFLAGS = -j1
-FLOW_COMMIT = 395e045c18d537fcbbc552a96ef2cdcd70b4ab52
+FLOW_COMMIT = bea8b83f50f597454941d2a7ecef6e93a881e576
 TEST262_COMMIT = f90a52b39609a620c0854e0bd0b3a906c930fd17
 
 # Fix color output until TravisCI fixes https://github.com/travis-ci/travis-ci/issues/7967
@@ -31,7 +31,7 @@ build-preset-env-standalone:
 build-dist: build
 	cd packages/babel-polyfill; \
 	scripts/build-dist.sh
-	cd packages/babel-runtime; \
+	cd packages/babel-plugin-transform-runtime; \
 	node scripts/build-dist.js
 
 watch: clean clean-lib
@@ -108,7 +108,8 @@ publish:
 	git pull --rebase
 	make clean-lib
 	rm -rf packages/babel-runtime/helpers
-	rm -rf packages/babel-runtime/core-js
+	rm -rf packages/babel-runtime-corejs2/helpers
+	rm -rf packages/babel-runtime-corejs2/core-js
 	BABEL_ENV=production make build-dist
 	make test
 	# not using lerna independent mode atm, so only update packages that have changed since we use ^
@@ -120,7 +121,7 @@ bootstrap: clean-all
 	yarn --ignore-engines
 	./node_modules/.bin/lerna bootstrap -- --ignore-engines
 	make build
-	cd packages/babel-runtime; \
+	cd packages/babel-plugin-transform-runtime; \
 	node scripts/build-dist.js
 
 clean-lib:

README.md

@@ -107,7 +107,7 @@ For questions and support please visit join our [Slack Community](https://slack.
 
 ### Is there a Babel song?
 
-I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by [@angus-c](https://github.com/angus-c). Tweet us your recordings!
+I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by [@angus-c](https://github.com/angus-c), [audio version](https://youtu.be/40abpedBKK8) by [@swyx](https://twitter.com/@swyx). Tweet us your recordings!
 
 ### Where are the docs?
 

SONG.md

@@ -1,5 +1,7 @@
 ## Hallelujah—In Praise of Babel
 
+➤ [🎶 Audio version here!](https://youtu.be/40abpedBKK8)
+
 I heard there was a clever trick  
 That rewrote all your JavaScript  
 But you don’t really care for magic, do you  

babel.config.js

@@ -13,13 +13,18 @@ module.exports = function(api) {
 
   let convertESM = true;
   let ignoreLib = true;
+  let includeRuntime = false;
 
   switch (env) {
     // Configs used during bundling builds.
     case "babel-parser":
+      convertESM = false;
+      ignoreLib = false;
+      break;
     case "standalone":
       convertESM = false;
       ignoreLib = false;
+      includeRuntime = true;
       break;
     case "production":
       // Config during builds before publish.
@@ -41,6 +46,10 @@ module.exports = function(api) {
   }
 
   const config = {
+    // Our dependencies are all standard CommonJS, along with all sorts of
+    // other random files in Babel's codebase, so we use script as the default,
+    // and then mark actual modules as modules farther down.
+    sourceType: "script",
     comments: false,
     ignore: [
       // These may not be strictly necessary with the newly-limited scope of
@@ -84,7 +93,29 @@ module.exports = function(api) {
           convertESM ? "@babel/transform-modules-commonjs" : null,
         ].filter(Boolean),
       },
-    ],
+      {
+        // The vast majority of our src files are modules, but we use
+        // unambiguous to keep things simple until we get around to renaming
+        // the modules to be more easily distinguished from CommonJS
+        test: [
+          "packages/*/src",
+          "packages/*/test",
+          "codemods/*/src",
+          "codemods/*/test",
+        ],
+        sourceType: "unambiguous",
+      },
+      {
+        // The runtime transform shouldn't process its own runtime or core-js.
+        exclude: [
+          "packages/babel-runtime",
+          /[\\/]node_modules[\\/](?:@babel\/runtime|babel-runtime|core-js)[\\/]/,
+        ],
+        plugins: [includeRuntime ? "@babel/transform-runtime" : null].filter(
+          Boolean
+        ),
+      },
+    ].filter(Boolean),
   };
 
   // we need to do this as long as we do not test everything from source

codemods/babel-plugin-codemod-object-assign-to-object-spread/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-codemod-object-assign-to-object-spread",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Transforms Object.assign into object spread syntax",
   "repository": "https://github.com/babel/babel/tree/master/codemods/babel-plugin-codemod-object-assign-to-object-spread",
   "license": "MIT",
@@ -10,14 +10,14 @@
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.53"
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.53",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.53"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   },
   "publishConfig": {
     "access": "public"

codemods/babel-plugin-codemod-optional-catch-binding/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-codemod-optional-catch-binding",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Remove unused catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/codemods/babel-plugin-codemod-remove-unused-catch-binding",
   "license": "MIT",
@@ -10,13 +10,13 @@
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.53"
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.53",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.53"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

lerna.json

@@ -1,6 +1,6 @@
 {
   "lerna": "2.11.0",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "changelog": {
     "repo": "babel/babel",
     "cacheDir": ".changelog",

lib/third-party-libs.js.flow

@@ -32,6 +32,20 @@ declare module "lodash/merge" {
   declare export default <T: Object>(T, Object) => T;
 }
 
+declare module "semver" {
+  declare module.exports: {
+    valid(v: string): boolean;
+    gt(v1: string, v2: string): boolean;
+    lt(v1: string, v2: string): boolean;
+    major(v: string): number;
+    minor(v: string): number;
+    patch(v: string): number;
+    satisfies(v1: string, r1: string): boolean;
+
+    intersects(r1: string, r2: string): boolean;
+  }
+}
+
 declare module "source-map" {
   declare export type SourceMap = {
     version: 3,

package.json

@@ -12,14 +12,18 @@
   "devDependencies": {
     "@babel/cli": "7.0.0-beta.52",
     "@babel/core": "7.0.0-beta.52",
+    "@babel/plugin-transform-runtime": "7.0.0-beta.52",
+    "@babel/plugin-proposal-class-properties": "7.0.0-beta.52",
+    "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.52",
+    "@babel/plugin-proposal-numeric-separator": "7.0.0-beta.52",
     "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.52",
     "@babel/preset-env": "7.0.0-beta.52",
     "@babel/preset-flow": "7.0.0-beta.52",
-    "@babel/preset-stage-0": "7.0.0-beta.52",
     "@babel/register": "7.0.0-beta.52",
+    "@babel/runtime": "7.0.0-beta.52",
     "babel-core": "^7.0.0-0",
-    "babel-eslint": "^8.2.5",
-    "babel-jest": "^22.4.1",
+    "babel-eslint": "^8.2.6",
+    "babel-jest": "^23.4.0",
     "babel-loader": "8.0.0-beta.0",
     "babel-plugin-transform-charcodes": "^0.1.0",
     "browserify": "^13.1.1",
@@ -28,11 +32,11 @@
     "charcodes": "^0.1.0",
     "derequire": "^2.0.2",
     "enhanced-resolve": "^3.0.0",
-    "eslint": "^5.0.1",
+    "eslint": "^5.1.0",
     "eslint-config-babel": "^7.0.2",
-    "eslint-plugin-flowtype": "^2.49.3",
-    "eslint-plugin-prettier": "^2.6.1",
-    "flow-bin": "^0.75.0",
+    "eslint-plugin-flowtype": "^2.50.0",
+    "eslint-plugin-prettier": "^2.6.2",
+    "flow-bin": "^0.76.0",
     "graceful-fs": "^4.1.11",
     "gulp": "^4.0.0",
     "gulp-babel": "^8.0.0-beta.2",
@@ -44,14 +48,14 @@
     "gulp-util": "^3.0.7",
     "gulp-watch": "^5.0.0",
     "husky": "^0.14.3",
-    "jest": "^22.4.2",
+    "jest": "^23.4.1",
     "lerna": "^2.11.0",
     "lerna-changelog": "^0.5.0",
     "lint-staged": "^6.0.1",
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "merge-stream": "^1.0.1",
     "output-file-sync": "^2.0.0",
-    "prettier": "1.13.2",
+    "prettier": "^1.13.7",
     "pump": "^1.0.2",
     "rimraf": "^2.4.3",
     "rollup-plugin-babel": "^4.0.0-beta.0",

packages/babel-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/cli",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Babel command line.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -20,7 +20,7 @@
     "convert-source-map": "^1.1.0",
     "fs-readdir-recursive": "^1.0.0",
     "glob": "^7.0.0",
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "mkdirp": "^0.5.1",
     "output-file-sync": "^2.0.0",
     "slash": "^1.0.0",
@@ -33,8 +33,8 @@
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.53",
-    "@babel/helper-fixtures": "7.0.0-beta.53"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-fixtures": "7.0.0-beta.56"
   },
   "bin": {
     "babel": "./bin/babel.js",

packages/babel-cli/src/babel/dir.js

@@ -89,7 +89,7 @@ export default async function({ cliOptions, babelOptions }) {
 
     const stat = fs.statSync(filenameOrDir);
 
-    if (stat.isDirectory(filenameOrDir)) {
+    if (stat.isDirectory()) {
       const dirname = filenameOrDir;
 
       let count = 0;

packages/babel-cli/src/babel/util.js

@@ -15,11 +15,15 @@ export function readdir(
   includeDotfiles: boolean,
   filter: ReaddirFilter,
 ) {
-  return readdirRecursive(
-    dirname,
-    filename =>
-      (includeDotfiles || filename[0] !== ".") && (!filter || filter(filename)),
-  );
+  return readdirRecursive(dirname, (filename, _index, currentDirectory) => {
+    const stat = fs.statSync(path.join(currentDirectory, filename));
+
+    if (stat.isDirectory()) return true;
+
+    return (
+      (includeDotfiles || filename[0] !== ".") && (!filter || filter(filename))
+    );
+  });
 }
 
 export function readdirForCompilable(

packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/foo.js

@@ -3,4 +3,4 @@
 arr.map(function (x) {
   return x * MULTIPLIER;
 });
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uL3NyYy9mb28uanMiXSwibmFtZXMiOlsiYXJyIiwibWFwIiwieCIsIk1VTFRJUExJRVIiXSwibWFwcGluZ3MiOiI7O0FBQUFBLElBQUlDLEdBQUosQ0FBUTtBQUFBLFNBQUtDLElBQUlDLFVBQVQ7QUFBQSxDQUFSIiwic291cmNlc0NvbnRlbnQiOlsiYXJyLm1hcCh4ID0+IHggKiBNVUxUSVBMSUVSKTsiXX0=
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uL3NyYy9mb28uanMiXSwibmFtZXMiOlsiYXJyIiwibWFwIiwieCIsIk1VTFRJUExJRVIiXSwibWFwcGluZ3MiOiI7O0FBQUFBLEdBQUcsQ0FBQ0MsR0FBSixDQUFRLFVBQUFDLENBQUM7QUFBQSxTQUFJQSxDQUFDLEdBQUdDLFVBQVI7QUFBQSxDQUFUIiwic291cmNlc0NvbnRlbnQiOlsiYXJyLm1hcCh4ID0+IHggKiBNVUxUSVBMSUVSKTsiXX0=

packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/foo.js.map

@@ -1 +1 @@
-{"version":3,"sources":["../src/foo.js"],"names":["arr","map","x","MULTIPLIER"],"mappings":";;AAAAA,IAAIC,GAAJ,CAAQ;AAAA,SAAKC,IAAIC,UAAT;AAAA,CAAR","sourcesContent":["arr.map(x => x * MULTIPLIER);"],"file":"foo.js"}
+{"version":3,"sources":["../src/foo.js"],"names":["arr","map","x","MULTIPLIER"],"mappings":";;AAAAA,GAAG,CAACC,GAAJ,CAAQ,UAAAC,CAAC;AAAA,SAAIA,CAAC,GAAGC,UAAR;AAAA,CAAT","sourcesContent":["arr.map(x => x * MULTIPLIER);"],"file":"foo.js"}

packages/babel-cli/test/fixtures/babel/dir --out-file/in-files/src/bar/bar.js

@@ -0,0 +1 @@
+ (() => 42)

packages/babel-cli/test/fixtures/babel/dir --out-file/in-files/src/foo.js

@@ -0,0 +1 @@
+arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/dir --out-file/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--out-file", "test.js"]
+}

packages/babel-cli/test/fixtures/babel/dir --out-file/out-files/test.js

@@ -0,0 +1,10 @@
+"use strict";
+
+(function () {
+  return 42;
+});
+"use strict";
+
+arr.map(function (x) {
+  return x * MULTIPLIER;
+});

packages/babel-cli/test/fixtures/babel/filename --out-file --source-maps inline/out-files/script2.js

@@ -4,4 +4,4 @@ arr.map(function (x) {
   return x * MULTIPLIER;
 });
 
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNjcmlwdC5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiOztBQUFBLElBQUksR0FBSixDQUFRO0FBQUEsU0FBSyxJQUFJLFVBQVQ7QUFBQSxDQUFSIiwiZmlsZSI6InNjcmlwdDIuanMiLCJzb3VyY2VzQ29udGVudCI6WyJhcnIubWFwKHggPT4geCAqIE1VTFRJUExJRVIpOyJdfQ==
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNjcmlwdC5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiOztBQUFBLEdBQUcsQ0FBQyxHQUFKLENBQVEsVUFBQSxDQUFDO0FBQUEsU0FBSSxDQUFDLEdBQUcsVUFBUjtBQUFBLENBQVQiLCJmaWxlIjoic2NyaXB0Mi5qcyIsInNvdXJjZXNDb250ZW50IjpbImFyci5tYXAoeCA9PiB4ICogTVVMVElQTElFUik7Il19

packages/babel-cli/test/fixtures/babel/filename-sourcemap --out-file --source-maps inline/out-files/script2.js

@@ -4,4 +4,4 @@ arr.map(function (x) {
   return x * MULTIPLIER;
 });
 
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIm9yaWdpbmFsLmpzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7O0FBQUEsSUFBQSxHQUFBLENBQUE7QUFBQSxTQUFVLElBQUEsVUFBVjtBQUFBLENBQUEiLCJmaWxlIjoic2NyaXB0Mi5qcyIsInNvdXJjZXNDb250ZW50IjpbInZhciBmb28gPSAoKSA9PiA0OyJdfQ==
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIm9yaWdpbmFsLmpzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7O0FBQUEsR0FBQSxDQUFBLEdBQUEsQ0FBQSxVQUFBLENBQUE7QUFBQSxTQUFVLENBQUEsR0FBQSxVQUFWO0FBQUEsQ0FBQSIsImZpbGUiOiJzY3JpcHQyLmpzIiwic291cmNlc0NvbnRlbnQiOlsidmFyIGZvbyA9ICgpID0+IDQ7Il19

packages/babel-cli/test/fixtures/babel/filenames --out-file --source-maps inline/out-files/script3.js

@@ -9,4 +9,4 @@ arr.map(function (x) {
   return x * MULTIPLIER;
 });
 
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNjcmlwdC5qcyIsInNjcmlwdDIuanMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6Ijs7QUFBQSxDQUFDO0FBQUEsU0FBTSxFQUFOO0FBQUEsQ0FBRDs7O0FDQUEsSUFBSSxHQUFKLENBQVE7QUFBQSxTQUFLLElBQUksVUFBVDtBQUFBLENBQVIiLCJmaWxlIjoic2NyaXB0My5qcyIsInNvdXJjZXNDb250ZW50IjpbIigoKSA9PiA0MikiLCJhcnIubWFwKHggPT4geCAqIE1VTFRJUExJRVIpOyJdfQ==
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNjcmlwdC5qcyIsInNjcmlwdDIuanMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6Ijs7QUFBQSxDQUFDO0FBQUEsU0FBTSxFQUFOO0FBQUEsQ0FBRDs7O0FDQUEsR0FBRyxDQUFDLEdBQUosQ0FBUSxVQUFBLENBQUM7QUFBQSxTQUFJLENBQUMsR0FBRyxVQUFSO0FBQUEsQ0FBVCIsImZpbGUiOiJzY3JpcHQzLmpzIiwic291cmNlc0NvbnRlbnQiOlsiKCgpID0+IDQyKSIsImFyci5tYXAoeCA9PiB4ICogTVVMVElQTElFUik7Il19

packages/babel-cli/test/fixtures/babel/filenames --out-file --source-maps/out-files/script3.js.map

@@ -1 +1 @@
-{"version":3,"sources":["script.js","script2.js"],"names":[],"mappings":";;AAAA,CAAC;AAAA,SAAM,EAAN;AAAA,CAAD;;;ACAA,IAAI,GAAJ,CAAQ;AAAA,SAAK,IAAI,UAAT;AAAA,CAAR","file":"script3.js","sourcesContent":["(() => 42)","arr.map(x => x * MULTIPLIER);"]}
+{"version":3,"sources":["script.js","script2.js"],"names":[],"mappings":";;AAAA,CAAC;AAAA,SAAM,EAAN;AAAA,CAAD;;;ACAA,GAAG,CAAC,GAAJ,CAAQ,UAAA,CAAC;AAAA,SAAI,CAAC,GAAG,UAAR;AAAA,CAAT","file":"script3.js","sourcesContent":["(() => 42)","arr.map(x => x * MULTIPLIER);"]}

packages/babel-code-frame/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/code-frame",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Generate errors that contain a code frame that point to source locations.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,7 +8,7 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-code-frame",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/highlight": "7.0.0-beta.53"
+    "@babel/highlight": "7.0.0-beta.56"
   },
   "devDependencies": {
     "chalk": "^2.0.0",

packages/babel-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/core",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Babel compiler core.",
   "main": "lib/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
@@ -30,24 +30,23 @@
     "./lib/transform-file.js": "./lib/transform-file-browser.js"
   },
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.53",
-    "@babel/generator": "7.0.0-beta.53",
-    "@babel/helpers": "7.0.0-beta.53",
-    "@babel/parser": "7.0.0-beta.53",
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53",
+    "@babel/code-frame": "7.0.0-beta.56",
+    "@babel/generator": "7.0.0-beta.56",
+    "@babel/helpers": "7.0.0-beta.56",
+    "@babel/parser": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
     "convert-source-map": "^1.1.0",
     "debug": "^3.1.0",
     "json5": "^0.5.0",
-    "lodash": "^4.17.5",
-    "micromatch": "^2.3.11",
+    "lodash": "^4.17.10",
     "resolve": "^1.3.2",
     "semver": "^5.4.1",
     "source-map": "^0.5.0"
   },
   "devDependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.53",
-    "@babel/register": "7.0.0-beta.53"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.56",
+    "@babel/register": "7.0.0-beta.56"
   }
 }

packages/babel-core/src/config/config-chain.js

@@ -1,7 +1,6 @@
 // @flow
 
 import path from "path";
-import micromatch from "micromatch";
 import buildDebug from "debug";
 import {
   validate,
@@ -10,6 +9,7 @@ import {
   type ConfigApplicableTest,
   type BabelrcSearch,
 } from "./validation/options";
+import pathPatternToRegex from "./pattern-to-regex";
 
 const debug = buildDebug("babel:config:config-chain");
 
@@ -52,11 +52,6 @@ export type ConfigContext = {
   envName: string,
 };
 
-type ConfigContextNamed = {
-  ...ConfigContext,
-  filename: string,
-};
-
 /**
  * Build a config chain for a given preset.
  */
@@ -217,7 +212,7 @@ function babelrcLoadEnabled(
 
   const absoluteRoot = context.root;
 
-  // Fast path to avoid having to load micromatch if the babelrc is just
+  // Fast path to avoid having to match patterns if the babelrc is just
   // loading in the standard root directory.
   if (babelrcRoots === undefined) {
     return pkgData.directories.indexOf(absoluteRoot) !== -1;
@@ -225,15 +220,23 @@ function babelrcLoadEnabled(
 
   let babelrcPatterns = babelrcRoots;
   if (!Array.isArray(babelrcPatterns)) babelrcPatterns = [babelrcPatterns];
-  babelrcPatterns = babelrcPatterns.map(pat => path.resolve(context.cwd, pat));
+  babelrcPatterns = babelrcPatterns.map(pat => {
+    return typeof pat === "string" ? path.resolve(context.cwd, pat) : pat;
+  });
 
-  // Fast path to avoid having to load micromatch if the babelrc is just
+  // Fast path to avoid having to match patterns if the babelrc is just
   // loading in the standard root directory.
   if (babelrcPatterns.length === 1 && babelrcPatterns[0] === absoluteRoot) {
     return pkgData.directories.indexOf(absoluteRoot) !== -1;
   }
 
-  return micromatch(pkgData.directories, babelrcPatterns).length > 0;
+  return babelrcPatterns.some(pat => {
+    if (typeof pat === "string") pat = pathPatternToRegex(pat, context.cwd);
+
+    return pkgData.directories.some(directory => {
+      return matchPattern(pat, context.cwd, directory);
+    });
+  });
 }
 
 const validateConfigFile = makeWeakCache(
@@ -500,11 +503,15 @@ function normalizeOptions(opts: ValidatedOptions): ValidatedOptions {
   };
   delete options.extends;
   delete options.env;
+  delete options.overrides;
   delete options.plugins;
   delete options.presets;
   delete options.passPerPreset;
   delete options.ignore;
   delete options.only;
+  delete options.test;
+  delete options.include;
+  delete options.exclude;
 
   // "sourceMap" is just aliased to sourceMap, so copy it over as
   // we merge the options together.
@@ -579,20 +586,9 @@ function configFieldIsApplicable(
   test: ConfigApplicableTest,
   dirname: string,
 ): boolean {
-  if (typeof context.filename !== "string") {
-    throw new Error(
-      `Configuration contains explicit test/include/exclude checks, but no filename was passed to Babel`,
-    );
-  }
-  // $FlowIgnore - Flow refinements aren't quite smart enough for this :(
-  const ctx: ConfigContextNamed = context;
-
   const patterns = Array.isArray(test) ? test : [test];
 
-  // Disabling negation here because it's a bit buggy from
-  // https://github.com/babel/babel/issues/6907 and it's not clear that it is
-  // needed since users can use 'exclude' alongside 'test'/'include'.
-  return matchesPatterns(ctx, patterns, dirname, false /* allowNegation */);
+  return matchesPatterns(context, patterns, dirname);
 }
 
 /**
@@ -604,43 +600,24 @@ function shouldIgnore(
   only: ?IgnoreList,
   dirname: string,
 ): boolean {
-  if (ignore) {
-    if (typeof context.filename !== "string") {
-      throw new Error(
-        `Configuration contains ignore checks, but no filename was passed to Babel`,
-      );
-    }
-    // $FlowIgnore - Flow refinements aren't quite smart enough for this :(
-    const ctx: ConfigContextNamed = context;
-    if (matchesPatterns(ctx, ignore, dirname)) {
-      debug(
-        "Ignored %o because it matched one of %O from %o",
-        context.filename,
-        ignore,
-        dirname,
-      );
-      return true;
-    }
+  if (ignore && matchesPatterns(context, ignore, dirname)) {
+    debug(
+      "Ignored %o because it matched one of %O from %o",
+      context.filename,
+      ignore,
+      dirname,
+    );
+    return true;
   }
 
-  if (only) {
-    if (typeof context.filename !== "string") {
-      throw new Error(
-        `Configuration contains ignore checks, but no filename was passed to Babel`,
-      );
-    }
-    // $FlowIgnore - Flow refinements aren't quite smart enough for this :(
-    const ctx: ConfigContextNamed = context;
-
-    if (!matchesPatterns(ctx, only, dirname)) {
-      debug(
-        "Ignored %o because it failed to match one of %O from %o",
-        context.filename,
-        only,
-        dirname,
-      );
-      return true;
-    }
+  if (only && !matchesPatterns(context, only, dirname)) {
+    debug(
+      "Ignored %o because it failed to match one of %O from %o",
+      context.filename,
+      only,
+      dirname,
+    );
+    return true;
   }
 
   return false;
@@ -651,64 +628,26 @@ function shouldIgnore(
  * Otherwise returns result of matching pattern Regex with filename.
  */
 function matchesPatterns(
-  context: ConfigContextNamed,
+  context: ConfigContext,
   patterns: IgnoreList,
   dirname: string,
-  allowNegation?: boolean = true,
 ): boolean {
-  const res = [];
-  const strings = [];
-  const fns = [];
-
-  patterns.forEach(pattern => {
-    if (typeof pattern === "string") strings.push(pattern);
-    else if (typeof pattern === "function") fns.push(pattern);
-    else res.push(pattern);
-  });
-
-  const filename = context.filename;
-  if (res.some(re => re.test(context.filename))) return true;
-  if (fns.some(fn => fn(filename))) return true;
-
-  if (strings.length > 0) {
-    const possibleDirs = getPossibleDirs(context);
-
-    const absolutePatterns = strings.map(pattern => {
-      // Preserve the "!" prefix so that micromatch can use it for negation.
-      const negate = pattern[0] === "!";
-      if (negate && !allowNegation) {
-        throw new Error(`Negation of file paths is not supported.`);
-      }
-      if (negate) pattern = pattern.slice(1);
-
-      return (negate ? "!" : "") + path.resolve(dirname, pattern);
-    });
-
-    if (
-      micromatch(possibleDirs, absolutePatterns, {
-        nocase: true,
-        nonegate: !allowNegation,
-      }).length > 0
-    ) {
-      return true;
-    }
-  }
-
-  return false;
+  return patterns.some(pattern =>
+    matchPattern(pattern, dirname, context.filename),
+  );
 }
 
-const getPossibleDirs = makeWeakCache((context: ConfigContextNamed) => {
-  let current = context.filename;
-  if (typeof current !== "string") return [];
+function matchPattern(pattern, dirname, pathToTest): boolean {
+  if (typeof pattern === "function") return !!pattern(pathToTest);
 
-  const possibleDirs = [current];
-  while (true) {
-    const previous = current;
-    current = path.dirname(current);
-    if (previous === current) break;
-
-    possibleDirs.push(current);
+  if (typeof pathToTest !== "string") {
+    throw new Error(
+      `Configuration contains string/RegExp pattern, but no filename was passed to Babel`,
+    );
   }
 
-  return possibleDirs;
-});
+  if (typeof pattern === "string") {
+    pattern = pathPatternToRegex(pattern, dirname);
+  }
+  return pattern.test(pathToTest);
+}

packages/babel-core/src/config/files/configuration.js

@@ -12,6 +12,7 @@ import {
 } from "../caching";
 import makeAPI from "../helpers/config-api";
 import { makeStaticFileCache } from "./utils";
+import pathPatternToRegex from "../pattern-to-regex";
 import type { FilePackageData, RelativeConfig, ConfigFile } from "./types";
 
 const debug = buildDebug("babel:config:loading:files:configuration");
@@ -240,15 +241,24 @@ const readConfigJSON5 = makeStaticFileCache((filepath, content) => {
 });
 
 const readIgnoreConfig = makeStaticFileCache((filepath, content) => {
-  const ignore = content
+  const ignoreDir = path.dirname(filepath);
+  const ignorePatterns = content
     .split("\n")
     .map(line => line.replace(/#(.*?)$/, "").trim())
     .filter(line => !!line);
 
+  for (const pattern of ignorePatterns) {
+    if (pattern[0] === "!") {
+      throw new Error(`Negation of file paths is not supported.`);
+    }
+  }
+
   return {
     filepath,
     dirname: path.dirname(filepath),
-    ignore,
+    ignore: ignorePatterns.map(pattern =>
+      pathPatternToRegex(pattern, ignoreDir),
+    ),
   };
 });
 

packages/babel-core/src/config/files/types.js

@@ -9,7 +9,7 @@ export type ConfigFile = {
 export type IgnoreFile = {
   filepath: string,
   dirname: string,
-  ignore: Array<string>,
+  ignore: Array<RegExp>,
 };
 
 export type RelativeConfig = {

packages/babel-core/src/config/pattern-to-regex.js

@@ -0,0 +1,51 @@
+// @flow
+import path from "path";
+import escapeRegExp from "lodash/escapeRegExp";
+
+const sep = `\\${path.sep}`;
+const endSep = `(?:${sep}|$)`;
+
+const substitution = `[^${sep}]+`;
+
+const starPat = `(?:${substitution}${sep})`;
+const starPatLast = `(?:${substitution}${endSep})`;
+
+const starStarPat = `${starPat}*?`;
+const starStarPatLast = `${starPat}*?${starPatLast}?`;
+
+/**
+ * Implement basic pattern matching that will allow users to do the simple
+ * tests with * and **. If users want full complex pattern matching, then can
+ * always use regex matching, or function validation.
+ */
+export default function pathToPattern(
+  pattern: string,
+  dirname: string,
+): RegExp {
+  const parts = path.resolve(dirname, pattern).split(path.sep);
+
+  return new RegExp(
+    [
+      "^",
+      ...parts.map((part, i) => {
+        const last = i === parts.length - 1;
+
+        // ** matches 0 or more path parts.
+        if (part === "**") return last ? starStarPatLast : starStarPat;
+
+        // * matches 1 path part.
+        if (part === "*") return last ? starPatLast : starPat;
+
+        // *.ext matches a wildcard with an extension.
+        if (part.indexOf("*.") === 0) {
+          return (
+            substitution + escapeRegExp(part.slice(1)) + (last ? endSep : sep)
+          );
+        }
+
+        // Otherwise match the pattern text.
+        return escapeRegExp(part) + (last ? endSep : sep);
+      }),
+    ].join(""),
+  );
+}

packages/babel-core/src/config/validation/option-assertions.js

@@ -192,14 +192,14 @@ export function assertBabelrcSearch(
 
   if (Array.isArray(value)) {
     value.forEach((item, i) => {
-      if (typeof item !== "string") {
-        throw new Error(`.${key}[${i}] must be a string.`);
+      if (!checkValidTest(item)) {
+        throw new Error(`.${key}[${i}] must be a string/Function/RegExp.`);
       }
     });
-  } else if (typeof value !== "string") {
+  } else if (!checkValidTest(value)) {
     throw new Error(
-      `.${key} must be a undefined, a boolean, a string, ` +
-        `or an array of strings, got ${JSON.stringify(value)}`,
+      `.${key} must be a undefined, a boolean, a string/Function/RegExp ` +
+        `or an array of those, got ${JSON.stringify(value)}`,
     );
   }
   return (value: any);

packages/babel-core/src/config/validation/options.js

@@ -242,7 +242,7 @@ export type OverridesList = Array<ValidatedOptions>;
 export type ConfigApplicableTest = IgnoreItem | Array<IgnoreItem>;
 
 export type ConfigFileSearch = string | boolean;
-export type BabelrcSearch = boolean | string | Array<string>;
+export type BabelrcSearch = boolean | IgnoreItem | IgnoreList;
 export type SourceMapsOption = boolean | "inline" | "both";
 export type SourceTypeOption = "module" | "script" | "unambiguous";
 export type CompactOption = boolean | "auto";

packages/babel-core/src/parse.js

@@ -24,8 +24,8 @@ type Parse = {
 
 export const parse: Parse = (function parse(code, opts, callback) {
   if (typeof opts === "function") {
-    opts = undefined;
     callback = opts;
+    opts = undefined;
   }
 
   // For backward-compat with Babel 7's early betas, we allow sync parsing when

packages/babel-core/src/transform-ast.js

@@ -31,8 +31,8 @@ export const transformFromAst: TransformFromAst = (function transformFromAst(
   callback,
 ) {
   if (typeof opts === "function") {
-    opts = undefined;
     callback = opts;
+    opts = undefined;
   }
 
   // For backward-compat with Babel 6, we allow sync transformation when

packages/babel-core/src/transform.js

@@ -18,8 +18,8 @@ type Transform = {
 
 export const transform: Transform = (function transform(code, opts, callback) {
   if (typeof opts === "function") {
-    opts = undefined;
     callback = opts;
+    opts = undefined;
   }
 
   // For backward-compat with Babel 6, we allow sync transformation when

packages/babel-core/src/transformation/file/file.js

@@ -5,6 +5,7 @@ import { NodePath, Hub, Scope } from "@babel/traverse";
 import { codeFrameColumns } from "@babel/code-frame";
 import traverse from "@babel/traverse";
 import * as t from "@babel/types";
+import semver from "semver";
 
 import type { NormalizedFile } from "../normalize-file";
 
@@ -64,6 +65,16 @@ export default class File {
   }
 
   set(key: mixed, val: mixed) {
+    if (key === "helpersNamespace") {
+      throw new Error(
+        "Babel 7.0.0-beta.56 has dropped support for the 'helpersNamespace' utility." +
+          "If you are using @babel/plugin-external-helpers you will need to use a newer " +
+          "version than the one you currently have installed. " +
+          "If you have your own implementation, you'll want to explore using 'helperGenerator' " +
+          "alongside 'file.availableHelper()'.",
+      );
+    }
+
     this._map.set(key, val);
   }
 
@@ -136,17 +147,38 @@ export default class File {
     );
   }
 
+  /**
+   * Check if a given helper is available in @babel/core's helper list.
+   *
+   * This _also_ allows you to pass a Babel version specifically. If the
+   * helper exists, but was not available for the full given range, it will be
+   * considered unavailable.
+   */
+  availableHelper(name: string, versionRange: ?string) {
+    let minVersion;
+    try {
+      minVersion = helpers.minVersion(name);
+    } catch (err) {
+      if (err.code !== "BABEL_HELPER_UNKNOWN") throw err;
+
+      return false;
+    }
+
+    return (
+      typeof versionRange !== "string" ||
+      (!semver.intersects(`<${minVersion}`, versionRange) &&
+        !semver.intersects(`>=8.0.0`, versionRange))
+    );
+  }
+
   addHelper(name: string): Object {
     const declar = this.declarations[name];
     if (declar) return t.cloneNode(declar);
 
     const generator = this.get("helperGenerator");
-    const runtime = this.get("helpersNamespace");
     if (generator) {
       const res = generator(name);
       if (res) return res;
-    } else if (runtime) {
-      return t.memberExpression(t.cloneNode(runtime), t.identifier(name));
     }
 
     const uid = (this.declarations[name] = this.scope.generateUidIdentifier(

packages/babel-core/src/transformation/normalize-file.js

@@ -2,6 +2,7 @@
 
 import path from "path";
 import buildDebug from "debug";
+import cloneDeep from "lodash/cloneDeep";
 import * as t from "@babel/types";
 import type { PluginPasses } from "../config";
 import convertSourceMap, { typeof Converter } from "convert-source-map";
@@ -75,6 +76,7 @@ export default function normalizeFile(
     } else if (ast.type !== "File") {
       throw new Error("AST root must be a Program or File node");
     }
+    ast = cloneDeep(ast);
   } else {
     // The parser's AST types aren't fully compatible with the types generated
     // by the logic in babel-types.

packages/babel-core/src/transformation/plugin-pass.js

@@ -31,6 +31,10 @@ export default class PluginPass {
     return this._map.get(key);
   }
 
+  availableHelper(name: string, versionRange: ?string) {
+    return this.file.availableHelper(name, versionRange);
+  }
+
   addHelper(name: string) {
     return this.file.addHelper(name);
   }

packages/babel-core/test/api.js

@@ -5,11 +5,18 @@ import Plugin from "../lib/config/plugin";
 import generator from "@babel/generator";
 
 function assertIgnored(result) {
-  expect(result).toBeFalsy();
+  expect(result).toBeNull();
 }
 
 function assertNotIgnored(result) {
-  expect(result.ignored).toBeFalsy();
+  expect(result).not.toBeNull();
+}
+
+function parse(code, opts) {
+  return babel.parse(code, {
+    cwd: __dirname,
+    ...opts,
+  });
 }
 
 function transform(code, opts) {
@@ -36,13 +43,18 @@ function transformFileSync(filename, opts) {
   });
 }
 
-// shim
 function transformAsync(code, opts) {
-  return {
-    then: function(resolve) {
-      resolve(transform(code, opts));
-    },
-  };
+  return babel.transformAsync(code, {
+    cwd: __dirname,
+    ...opts,
+  });
+}
+
+function transformFromAst(ast, code, opts) {
+  return babel.transformFromAst(ast, code, {
+    cwd: __dirname,
+    ...opts,
+  });
 }
 
 describe("parser and generator options", function() {
@@ -170,6 +182,30 @@ describe("api", function() {
     expect(options).toEqual({ babelrc: false });
   });
 
+  it("transformFromAst should not mutate the AST", function() {
+    const program = "const identifier = 1";
+    const node = parse(program);
+    const { code } = transformFromAst(node, program, {
+      plugins: [
+        function() {
+          return {
+            visitor: {
+              Identifier: function(path) {
+                path.node.name = "replaced";
+              },
+            },
+          };
+        },
+      ],
+    });
+
+    expect(code).toBe("const replaced = 1;");
+    expect(node.program.body[0].declarations[0].id.name).toBe(
+      "identifier",
+      "original ast should not have been mutated",
+    );
+  });
+
   it("options throw on falsy true", function() {
     return expect(function() {
       transform("", {

packages/babel-core/test/config-chain.js

@@ -899,6 +899,23 @@ describe("buildConfigChain", function() {
 
       expect(opts.comments).toBe(true);
     });
+
+    it("should remove the overrides and filtering fields from the options", () => {
+      const opts = loadOptions({
+        cwd: fixture("nonexistant-fake"),
+        filename: fixture("nonexistant-fake", "src.js"),
+        babelrc: false,
+        overrides: [],
+        test: /^/,
+        include: /^/,
+        exclude: [],
+      });
+
+      expect(opts.overrides).toBeUndefined();
+      expect(opts.test).toBeUndefined();
+      expect(opts.include).toBeUndefined();
+      expect(opts.exclude).toBeUndefined();
+    });
   });
 
   describe("config files", () => {

packages/babel-core/test/fixtures/parse/.babelrc

@@ -1,5 +1,5 @@
 {
-  "plugins": [
-    ["@babel/syntax-decorators", { "legacy": true }]
-  ]
+  "parserOpts": {
+  	"plugins": ["decorators-legacy"]
+  }
 }

packages/babel-core/test/fixtures/transformation/misc/regression-4855/options.json

@@ -1,7 +1,10 @@
 {
   "compact": false,
   "presets": [
-    "env",
-    ["stage-2", { "decoratorsLegacy": true }]
+    "env"
+  ],
+  "plugins": [
+    "external-helpers",
+    "proposal-object-rest-spread"
   ]
 }

packages/babel-core/test/fixtures/transformation/source-maps/arrow-function/source-mappings.json

@@ -1,7 +1,7 @@
 [{
   "original": {
     "line": 1,
-    "column": 13
+    "column": 14
   },
   "generated": {
     "line": 2,

packages/babel-core/test/fixtures/transformation/source-maps/full/source-map.json

@@ -6,6 +6,6 @@
     "map",
     "x"
   ],
-  "mappings": "AAAAA,IAAIC,GAAJ,CAAQ;AAAA,SAAKC,IAAIA,CAAT;AAAA,CAAR",
+  "mappings": "AAAAA,GAAG,CAACC,GAAJ,CAAQ,UAAAC,CAAC;AAAA,SAAIA,CAAC,GAAGA,CAAR;AAAA,CAAT",
   "sourcesContent": ["arr.map(x => x * x);"]
 }

packages/babel-core/test/fixtures/transformation/source-maps/inline/output.js

@@ -1,4 +1,4 @@
 arr.map(function (x) {
   return x * x;
 });
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNvdXJjZS1tYXBzL2lubGluZS9pbnB1dC5qcyJdLCJuYW1lcyI6WyJhcnIiLCJtYXAiLCJ4Il0sIm1hcHBpbmdzIjoiQUFBQUEsSUFBSUMsR0FBSixDQUFRO0FBQUEsU0FBS0MsSUFBSUEsQ0FBVDtBQUFBLENBQVIiLCJzb3VyY2VzQ29udGVudCI6WyJhcnIubWFwKHggPT4geCAqIHgpOyJdfQ==
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNvdXJjZS1tYXBzL2lubGluZS9pbnB1dC5qcyJdLCJuYW1lcyI6WyJhcnIiLCJtYXAiLCJ4Il0sIm1hcHBpbmdzIjoiQUFBQUEsR0FBRyxDQUFDQyxHQUFKLENBQVEsVUFBQUMsQ0FBQztBQUFBLFNBQUlBLENBQUMsR0FBR0EsQ0FBUjtBQUFBLENBQVQiLCJzb3VyY2VzQ29udGVudCI6WyJhcnIubWFwKHggPT4geCAqIHgpOyJdfQ==

packages/babel-core/test/fixtures/transformation/source-maps/input-source-map-complex/source-map.json

@@ -4,7 +4,7 @@
     "HelloWorld.vue"
   ],
   "names": [],
-  "mappings": ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;eAsFA;AACA,QAAA,YADA;;AAEA,SAAA;AACA,WAAA;AACA,WAAA;AADA,KAAA;AAGA;;AANA,C",
+  "mappings": ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;eAsFA;AACA,EAAA,IAAA,EAAA,YADA;;AAEA,EAAA,IAAA,GAAA;AACA,WAAA;AACA,MAAA,GAAA,EAAA;AADA,KAAA;AAGA;;AANA,C",
   "sourceRoot": "src/components",
   "sourcesContent": [
     "<template>\n  <div class=\"hello\">\n    <h1>{{ msg }}</h1>\n    <h2>Essential Links</h2>\n    <ul>\n      <li>\n        <a\n          href=\"https://vuejs.org\"\n          target=\"_blank\"\n        >\n          Core Docs\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"https://forum.vuejs.org\"\n          target=\"_blank\"\n        >\n          Forum\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"https://chat.vuejs.org\"\n          target=\"_blank\"\n        >\n          Community Chat\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"https://twitter.com/vuejs\"\n          target=\"_blank\"\n        >\n          Twitter\n        </a>\n      </li>\n      <br>\n      <li>\n        <a\n          href=\"http://vuejs-templates.github.io/webpack/\"\n          target=\"_blank\"\n        >\n          Docs for This Template\n        </a>\n      </li>\n    </ul>\n    <h2>Ecosystem</h2>\n    <ul>\n      <li>\n        <a\n          href=\"http://router.vuejs.org/\"\n          target=\"_blank\"\n        >\n          vue-router\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"http://vuex.vuejs.org/\"\n          target=\"_blank\"\n        >\n          vuex\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"http://vue-loader.vuejs.org/\"\n          target=\"_blank\"\n        >\n          vue-loader\n        </a>\n      </li>\n      <li>\n        <a\n          href=\"https://github.com/vuejs/awesome-vue\"\n          target=\"_blank\"\n        >\n          awesome-vue\n        </a>\n      </li>\n    </ul>\n  </div>\n</template>\n\n<script>\nexport default {\n  name: 'HelloWorld',\n  data () {\n    return {\n      msg: 'Welcome to Your Vue.js App'\n    }\n  }\n}\n</script>\n\n<!-- Add \"scoped\" attribute to limit CSS to this component only -->\n<style scoped>\nh1, h2 {\n  font-weight: normal;\n}\nul {\n  list-style-type: none;\n  padding: 0;\n}\nli {\n  display: inline-block;\n  margin: 0 10px;\n}\na {\n  color: #42b983;\n}\n</style>\n"

packages/babel-core/test/fixtures/transformation/source-maps/input-source-map/source-map.json

@@ -1,5 +1,5 @@
 {
-  "mappings": "AAAA,IAAA,MAAU,Y;SAAM,C;AAAC,CAAjB",
+  "mappings": "AAAA,IAAA,GAAA,GAAU,Y;SAAM,C;AAAC,CAAjB",
   "names": [],
   "sources": ["original.js"],
   "sourcesContent": ["var foo = () => 4;"],

packages/babel-core/test/fixtures/transformation/source-maps/interpreter-directive-prefix/source-map.json

@@ -1,5 +1,5 @@
 {
-  "mappings": "AAAA;AAEAA,QAAQC,GAAR,CAAY,eAAZ",
+  "mappings": "AAAA;AAEAA,OAAO,CAACC,GAAR,CAAY,eAAZ",
   "names": [
     "console",
     "log"

packages/babel-generator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/generator",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Turns an AST into code.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -11,14 +11,14 @@
     "lib"
   ],
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53",
+    "@babel/types": "7.0.0-beta.56",
     "jsesc": "^2.5.1",
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "source-map": "^0.5.0",
     "trim-right": "^1.0.1"
   },
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.53",
-    "@babel/parser": "7.0.0-beta.53"
+    "@babel/helper-fixtures": "7.0.0-beta.56",
+    "@babel/parser": "7.0.0-beta.56"
   }
 }

packages/babel-generator/src/buffer.js

@@ -30,6 +30,7 @@ export default class Buffer {
     column: null,
     filename: null,
   };
+  _disallowedPop: Object | null = null;
 
   /**
    * Get the final string output from the buffer, along with the sourcemap if one exists.
@@ -71,8 +72,14 @@ export default class Buffer {
 
   append(str: string): void {
     this._flush();
-    const { line, column, filename, identifierName } = this._sourcePosition;
-    this._append(str, line, column, identifierName, filename);
+    const {
+      line,
+      column,
+      filename,
+      identifierName,
+      force,
+    } = this._sourcePosition;
+    this._append(str, line, column, identifierName, filename, force);
   }
 
   /**
@@ -87,8 +94,14 @@ export default class Buffer {
       }
     }
 
-    const { line, column, filename, identifierName } = this._sourcePosition;
-    this._queue.unshift([str, line, column, identifierName, filename]);
+    const {
+      line,
+      column,
+      filename,
+      identifierName,
+      force,
+    } = this._sourcePosition;
+    this._queue.unshift([str, line, column, identifierName, filename, force]);
   }
 
   _flush(): void {
@@ -102,6 +115,7 @@ export default class Buffer {
     column: number,
     identifierName: ?string,
     filename: ?string,
+    force?: boolean,
   ): void {
     // If there the line is ending, adding a new mapping marker is redundant
     if (this._map && str[0] !== "\n") {
@@ -112,6 +126,7 @@ export default class Buffer {
         column,
         identifierName,
         filename,
+        force,
       );
     }
 
@@ -169,20 +184,60 @@ export default class Buffer {
     return this._queue.length > 0 || !!this._last;
   }
 
+  /**
+   * Certain sourcemap usecases expect mappings to be more accurate than
+   * Babel's generic sourcemap handling allows. For now, we special-case
+   * identifiers to allow for the primary cases to work.
+   * The goal of this line is to ensure that the map output from Babel will
+   * have an exact range on identifiers in the output code. Without this
+   * line, Babel would potentially include some number of trailing tokens
+   * that are printed after the identifier, but before another location has
+   * been assigned.
+   * This allows tooling like Rollup and Webpack to more accurately perform
+   * their own transformations. Most importantly, this allows the import/export
+   * transformations performed by those tools to loose less information when
+   * applying their own transformations on top of the code and map results
+   * generated by Babel itself.
+   *
+   * The primary example of this is the snippet:
+   *
+   *   import mod from "mod";
+   *   mod();
+   *
+   * With this line, there will be one mapping range over "mod" and another
+   * over "();", where previously it would have been a single mapping.
+   */
+  exactSource(loc: Object, cb: () => void) {
+    // In cases where parent expressions start at the same locations as the
+    // identifier itself, the current active location could already be the
+    // start of this range. We use 'force' here to explicitly start a new
+    // mapping range for this new token.
+    this.source("start", loc, true /* force */);
+
+    cb();
+
+    // In cases where tokens are printed after this item, we want to
+    // ensure that they get the location of the _end_ of the identifier.
+    // To accomplish this, we assign the location and explicitly disable
+    // the standard Buffer withSource previous-position "reactivation"
+    // logic. This means that if another item calls '.source()' to set
+    // the location after the identifier, it is fine, but the position won't
+    // be automatically replaced with the previous value.
+    this.source("end", loc);
+    this._disallowPop("start", loc);
+  }
+
   /**
    * Sets a given position as the current source location so generated code after this call
    * will be given this position in the sourcemap.
    */
 
-  source(prop: string, loc: Location): void {
+  source(prop: string, loc: Location, force?: boolean): void {
     if (prop && !loc) return;
 
-    const pos = loc ? loc[prop] : null;
-
-    this._sourcePosition.identifierName = (loc && loc.identifierName) || null;
-    this._sourcePosition.line = pos ? pos.line : null;
-    this._sourcePosition.column = pos ? pos.column : null;
-    this._sourcePosition.filename = (loc && loc.filename) || null;
+    // Since this is called extremly often, we re-use the same _sourcePosition
+    // object for the whole lifetime of the buffer.
+    this._normalizePosition(prop, loc, this._sourcePosition, force);
   }
 
   /**
@@ -192,7 +247,9 @@ export default class Buffer {
   withSource(prop: string, loc: Location, cb: () => void): void {
     if (!this._map) return cb();
 
-    // Use the call stack to manage a stack of "source location" data.
+    // Use the call stack to manage a stack of "source location" data because
+    // the _sourcePosition object is mutated over the course of code generation,
+    // and constantly copying it would be slower.
     const originalLine = this._sourcePosition.line;
     const originalColumn = this._sourcePosition.column;
     const originalFilename = this._sourcePosition.filename;
@@ -202,10 +259,79 @@ export default class Buffer {
 
     cb();
 
-    this._sourcePosition.line = originalLine;
-    this._sourcePosition.column = originalColumn;
-    this._sourcePosition.filename = originalFilename;
-    this._sourcePosition.identifierName = originalIdentifierName;
+    if (
+      // If the current active position is forced, we only want to reactivate
+      // the old position if it is different from the newest position.
+      (!this._sourcePosition.force ||
+        this._sourcePosition.line !== originalLine ||
+        this._sourcePosition.column !== originalColumn ||
+        this._sourcePosition.filename !== originalFilename) &&
+      // Verify if reactivating this specific position has been disallowed.
+      (!this._disallowedPop ||
+        this._disallowedPop.line !== originalLine ||
+        this._disallowedPop.column !== originalColumn ||
+        this._disallowedPop.filename !== originalFilename)
+    ) {
+      this._sourcePosition.line = originalLine;
+      this._sourcePosition.column = originalColumn;
+      this._sourcePosition.filename = originalFilename;
+      this._sourcePosition.identifierName = originalIdentifierName;
+      this._sourcePosition.force = false;
+      this._disallowedPop = null;
+    }
+  }
+
+  /**
+   * Allow printers to disable the default location-reset behavior of the
+   * sourcemap output, so that certain printers can be sure that the
+   * "end" location that they set is actually treated as the end position.
+   */
+  _disallowPop(prop: string, loc: Location) {
+    if (prop && !loc) return;
+
+    this._disallowedPop = this._normalizePosition(prop, loc);
+  }
+
+  _normalizePosition(
+    prop: string,
+    loc: Object,
+    targetObj: Object,
+    force?: boolean,
+  ) {
+    const pos = loc ? loc[prop] : null;
+
+    if (targetObj === undefined) {
+      // Initialize with fields so that the object doesn't change shape.
+      targetObj = {
+        identifierName: null,
+        line: null,
+        column: null,
+        filename: null,
+        force: false,
+      };
+    }
+
+    const origLine = targetObj.line;
+    const origColumn = targetObj.column;
+    const origFilename = targetObj.filename;
+
+    targetObj.identifierName =
+      (prop === "start" && loc && loc.identifierName) || null;
+    targetObj.line = pos ? pos.line : null;
+    targetObj.column = pos ? pos.column : null;
+    targetObj.filename = (loc && loc.filename) || null;
+
+    // We want to skip reassigning `force` if we're re-setting the same position.
+    if (
+      force ||
+      targetObj.line !== origLine ||
+      targetObj.column !== origColumn ||
+      targetObj.filename !== origFilename
+    ) {
+      targetObj.force = force;
+    }
+
+    return targetObj;
   }
 
   getCurrentColumn(): number {

packages/babel-generator/src/generators/classes.js

@@ -124,6 +124,7 @@ export function ClassPrivateProperty(node: Object) {
     this.space();
   }
   this.print(node.key, node);
+  this.print(node.typeAnnotation, node);
   if (node.value) {
     this.space();
     this.token("=");

packages/babel-generator/src/generators/template-literals.js

@@ -1,5 +1,6 @@
 export function TaggedTemplateExpression(node: Object) {
   this.print(node.tag, node);
+  this.print(node.typeParameters, node); // TS
   this.print(node.quasi, node);
 }
 

packages/babel-generator/src/generators/types.js

@@ -2,7 +2,9 @@ import * as t from "@babel/types";
 import jsesc from "jsesc";
 
 export function Identifier(node: Object) {
-  this.word(node.name);
+  this.exactSource(node.loc, () => {
+    this.word(node.name);
+  });
 }
 
 export function RestElement(node: Object) {

packages/babel-generator/src/printer.js

@@ -200,6 +200,12 @@ export default class Printer {
     this._buf.removeTrailingNewline();
   }
 
+  exactSource(loc: Object, cb: () => void) {
+    this._catchUp("start", loc);
+
+    this._buf.exactSource(loc, cb);
+  }
+
   source(prop: string, loc: Object): void {
     this._catchUp(prop, loc);
 

packages/babel-generator/src/source-map.js

@@ -53,6 +53,7 @@ export default class SourceMap {
     column: number,
     identifierName: ?string,
     filename: ?string,
+    force?: boolean,
   ) {
     // Adding an empty mapping at the start of a generated line just clutters the map.
     if (this._lastGenLine !== generatedLine && line === null) return;
@@ -60,6 +61,7 @@ export default class SourceMap {
     // If this mapping points to the same source location as the last one, we can ignore it since
     // the previous one covers it.
     if (
+      !force &&
       this._lastGenLine === generatedLine &&
       this._lastSourceLine === line &&
       this._lastSourceColumn === column

packages/babel-generator/test/fixtures/flow/type-annotations/input.js

@@ -72,6 +72,10 @@ class Foo {
   static prop1: string;
   prop2: number;
 }
+class Foo {
+  #prop1: string;
+  prop2: number;
+}
 var x: number | string = 4;
 class Array { concat(items:number | string) {}; }
 var x: () => number | () => string = fn;

packages/babel-generator/test/fixtures/flow/type-annotations/options.json

@@ -0,0 +1 @@
+{ "plugins": ["classPrivateProperties", "flow"] }

packages/babel-generator/test/fixtures/flow/type-annotations/output.js

@@ -168,6 +168,11 @@ class Foo {
   prop2: number;
 }
 
+class Foo {
+  #prop1: string;
+  prop2: number;
+}
+
 var x: number | string = 4;
 
 class Array {

packages/babel-generator/test/fixtures/sourcemaps/call-identifiers/input.js

@@ -0,0 +1,16 @@
+foo;
+foo();
+foo().bar;
+obj.foo;
+obj.foo();
+obj.foo.bar;
+obj.foo().bar;
+{
+  foo;
+  foo();
+  foo().bar;
+  obj.foo;
+  obj.foo();
+  obj.foo.bar;
+  obj.foo().bar;
+}

packages/babel-generator/test/fixtures/sourcemaps/call-identifiers/output.js

@@ -0,0 +1,16 @@
+foo;
+foo();
+foo().bar;
+obj.foo;
+obj.foo();
+obj.foo.bar;
+obj.foo().bar;
+{
+  foo;
+  foo();
+  foo().bar;
+  obj.foo;
+  obj.foo();
+  obj.foo.bar;
+  obj.foo().bar;
+}

packages/babel-generator/test/fixtures/sourcemaps/call-identifiers/source-map.json

@@ -0,0 +1,9 @@
+{
+  "mappings": "AAAAA,GAAG;AACHA,GAAG;AACHA,GAAG,GAAGC,GAAN;AACAC,GAAG,CAACF,GAAJ;AACAE,GAAG,CAACF,GAAJ;AACAE,GAAG,CAACF,GAAJ,CAAQC,GAAR;AACAC,GAAG,CAACF,GAAJ,GAAUC,GAAV;AACA;AACED,EAAAA,GAAG;AACHA,EAAAA,GAAG;AACHA,EAAAA,GAAG,GAAGC,GAAN;AACAC,EAAAA,GAAG,CAACF,GAAJ;AACAE,EAAAA,GAAG,CAACF,GAAJ;AACAE,EAAAA,GAAG,CAACF,GAAJ,CAAQC,GAAR;AACAC,EAAAA,GAAG,CAACF,GAAJ,GAAUC,GAAV;AACD",
+  "names": ["foo", "bar", "obj"],
+  "sources": ["fixtures/sourcemaps/call-identifiers/input.js"],
+  "sourcesContent": [
+    "foo;\nfoo();\nfoo().bar;\nobj.foo;\nobj.foo();\nobj.foo.bar;\nobj.foo().bar;\n{\n  foo;\n  foo();\n  foo().bar;\n  obj.foo;\n  obj.foo();\n  obj.foo.bar;\n  obj.foo().bar;\n}"
+  ],
+  "version": 3
+}

packages/babel-generator/test/fixtures/typescript/type-arguments-tagged-template/input.js

@@ -0,0 +1 @@
+f<T>``;

packages/babel-generator/test/fixtures/typescript/type-arguments-tagged-template/output.js

@@ -0,0 +1 @@
+f<T>``;

packages/babel-generator/test/index.js

@@ -49,7 +49,8 @@ describe("generation", function() {
         version: 3,
         sources: ["a.js", "b.js"],
         mappings:
-          "AAAA,SAASA,EAAT,CAAaC,GAAb,EAAkB;AAAEC,UAAQC,GAAR,CAAYF,GAAZ;AAAmB;;ACAvCD,GAAG,OAAH",
+          // eslint-disable-next-line max-len
+          "AAAA,SAASA,EAAT,CAAaC,GAAb,EAAkB;AAAEC,EAAAA,OAAO,CAACC,GAAR,CAAYF,GAAZ;AAAmB;;ACAvCD,EAAE,CAAC,OAAD,CAAF",
         names: ["hi", "msg", "console", "log"],
         sourcesContent: [
           "function hi (msg) { console.log(msg); }\n",
@@ -103,6 +104,18 @@ describe("generation", function() {
           source: "a.js",
           original: { line: 1, column: 20 },
         },
+        {
+          name: "console",
+          generated: { line: 2, column: 2 },
+          source: "a.js",
+          original: { line: 1, column: 20 },
+        },
+        {
+          name: undefined,
+          generated: { line: 2, column: 9 },
+          source: "a.js",
+          original: { line: 1, column: 27 },
+        },
         {
           name: "log",
           generated: { line: 2, column: 10 },
@@ -139,6 +152,12 @@ describe("generation", function() {
           source: "b.js",
           original: { line: 1, column: 0 },
         },
+        {
+          name: undefined,
+          generated: { line: 5, column: 2 },
+          source: "b.js",
+          original: { line: 1, column: 2 },
+        },
         {
           name: undefined,
           generated: { line: 5, column: 3 },
@@ -149,6 +168,12 @@ describe("generation", function() {
           name: undefined,
           generated: { line: 5, column: 10 },
           source: "b.js",
+          original: { line: 1, column: 2 },
+        },
+        {
+          name: undefined,
+          generated: { line: 5, column: 11 },
+          source: "b.js",
           original: { line: 1, column: 0 },
         },
       ],
@@ -189,7 +214,7 @@ describe("generation", function() {
         version: 3,
         sources: ["inline"],
         names: ["foo", "bar"],
-        mappings: "AAAA,SAASA,IAAT,GAAe;AAAEC;AAAM",
+        mappings: "AAAA,SAASA,IAAT,GAAe;AAAEC,EAAAA,IAAG;AAAG",
         sourcesContent: ["function foo() { bar; }\n"],
       },
       "sourcemap was incorrectly generated",
@@ -227,6 +252,18 @@ describe("generation", function() {
           source: "inline",
           original: { line: 1, column: 17 },
         },
+        {
+          name: "bar",
+          generated: { line: 2, column: 2 },
+          source: "inline",
+          original: { line: 1, column: 17 },
+        },
+        {
+          name: undefined,
+          generated: { line: 2, column: 6 },
+          source: "inline",
+          original: { line: 1, column: 20 },
+        },
         {
           name: undefined,
           generated: { line: 3, column: 0 },
@@ -362,36 +399,49 @@ const suites = fixtures(`${__dirname}/fixtures`);
 suites.forEach(function(testSuite) {
   describe("generation/" + testSuite.title, function() {
     testSuite.tests.forEach(function(task) {
-      it(
+      const testFn = task.disabled ? it.skip : it;
+
+      testFn(
         task.title,
-        !task.disabled &&
-          function() {
-            const expected = task.expect;
-            const actual = task.actual;
-            const actualCode = actual.code;
 
-            if (actualCode) {
-              const actualAst = parse(actualCode, {
-                filename: actual.loc,
-                plugins: task.options.plugins || [],
-                strictMode: false,
-                sourceType: "module",
-              });
-              const result = generate(actualAst, task.options, actualCode);
+        function() {
+          const expected = task.expect;
+          const actual = task.actual;
+          const actualCode = actual.code;
 
-              if (
-                !expected.code &&
-                result.code &&
-                fs.statSync(path.dirname(expected.loc)).isDirectory() &&
-                !process.env.CI
-              ) {
-                console.log(`New test file created: ${expected.loc}`);
-                fs.writeFileSync(expected.loc, result.code);
-              } else {
-                expect(result.code).toBe(expected.code);
-              }
+          if (actualCode) {
+            const actualAst = parse(actualCode, {
+              filename: actual.loc,
+              plugins: task.options.plugins || [],
+              strictMode: false,
+              sourceType: "module",
+              sourceMaps: !!task.sourceMap,
+            });
+            const options = {
+              sourceFileName: path.relative(__dirname, actual.loc),
+              ...task.options,
+              sourceMaps: task.sourceMap ? true : task.options.sourceMaps,
+            };
+
+            const result = generate(actualAst, options, actualCode);
+
+            if (options.sourceMaps) {
+              expect(result.map).toEqual(task.sourceMap);
             }
-          },
+
+            if (
+              !expected.code &&
+              result.code &&
+              fs.statSync(path.dirname(expected.loc)).isDirectory() &&
+              !process.env.CI
+            ) {
+              console.log(`New test file created: ${expected.loc}`);
+              fs.writeFileSync(expected.loc, result.code);
+            } else {
+              expect(result.code).toBe(expected.code);
+            }
+          }
+        },
       );
     });
   });

packages/babel-helper-annotate-as-pure/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-annotate-as-pure",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to annotate paths and nodes with #__PURE__ comment",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-annotate-as-pure",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-bindify-decorators/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-bindify-decorators",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to bindify decorators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-bindify-decorators",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-builder-binary-assignment-operator-visitor/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-binary-assignment-operator-visitor",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to build binary assignment operator visitors",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-binary-assignment-operator-visitor",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-explode-assignable-expression": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-explode-assignable-expression": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-builder-react-jsx/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-react-jsx",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to build react jsx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-react-jsx",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53",
+    "@babel/types": "7.0.0-beta.56",
     "esutils": "^2.0.0"
   }
 }

packages/babel-helper-call-delegate/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-call-delegate",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to call delegate",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-call-delegate",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-hoist-variables": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-hoist-variables": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-define-map/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-define-map",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to define a map",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-define-map",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53",
-    "lodash": "^4.17.5"
+    "@babel/helper-function-name": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
+    "lodash": "^4.17.10"
   }
 }

packages/babel-helper-explode-assignable-expression/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-explode-assignable-expression",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to explode an assignable expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-assignable-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-explode-class/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-explode-class",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to explode class",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-class",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-bindify-decorators": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-bindify-decorators": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-fixtures/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-fixtures",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to support fixtures",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "license": "MIT",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-fixtures",
   "main": "lib/index.js",
   "dependencies": {
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "semver": "^5.3.0",
     "try-resolve": "^1.0.0"
   }

packages/babel-helper-function-name/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-function-name",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to change the property 'name' of every function",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-function-name",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-get-function-arity": "7.0.0-beta.53",
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-get-function-arity": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-get-function-arity/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-get-function-arity",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to get function arity",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-get-function-arity",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-hoist-variables/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-hoist-variables",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to hoist variables",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-hoist-variables",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-member-expression-to-functions/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-member-expression-to-functions",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to replace certain member expressions with function calls",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-member-expression-to-functions",
   "license": "MIT",
   "main": "lib/index.js",
   "author": "Justin Ridgewell <justin@ridgewell.name>",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-module-imports/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-imports",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper functions for inserting module loads",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,10 +8,10 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-imports",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53",
-    "lodash": "^4.17.5"
+    "@babel/types": "7.0.0-beta.56",
+    "lodash": "^4.17.10"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.53"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-helper-module-imports/test/index.js

@@ -18,7 +18,12 @@ function test(sourceType, opts, initializer, expectedCode) {
       function({ types: t }) {
         return {
           pre(file) {
-            file.set("helpersNamespace", t.identifier("babelHelpers"));
+            file.set("helperGenerator", name =>
+              t.memberExpression(
+                t.identifier("babelHelpers"),
+                t.identifier(name),
+              ),
+            );
           },
           visitor: {
             Program(path) {

packages/babel-helper-module-transforms/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-transforms",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper functions for implementing ES6 module transformations",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-transforms",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-imports": "7.0.0-beta.53",
-    "@babel/helper-simple-access": "7.0.0-beta.53",
-    "@babel/helper-split-export-declaration": "7.0.0-beta.53",
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53",
-    "lodash": "^4.17.5"
+    "@babel/helper-module-imports": "7.0.0-beta.56",
+    "@babel/helper-simple-access": "7.0.0-beta.56",
+    "@babel/helper-split-export-declaration": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
+    "lodash": "^4.17.10"
   }
 }

packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js

@@ -246,12 +246,18 @@ function getModuleMetadata(
   });
 
   for (const metadata of sourceData.values()) {
-    if (metadata.importsNamespace.size > 0) {
-      metadata.interop = "namespace";
-      continue;
-    }
     let needsDefault = false;
     let needsNamed = false;
+
+    if (metadata.importsNamespace.size > 0) {
+      needsDefault = true;
+      needsNamed = true;
+    }
+
+    if (metadata.reexportAll) {
+      needsNamed = true;
+    }
+
     for (const importName of metadata.imports.values()) {
       if (importName === "default") needsDefault = true;
       else needsNamed = true;

packages/babel-helper-optimise-call-expression/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-optimise-call-expression",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to optimise call expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-optimise-call-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-plugin-test-runner/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-plugin-test-runner",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to support test runner",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-plugin-test-runner",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.53"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-helper-plugin-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-plugin-utils",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "General utilities for plugins to use",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",

packages/babel-helper-regex/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-regex",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to check for literal RegEx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-regex",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "lodash": "^4.17.5"
+    "lodash": "^4.17.10"
   }
 }

packages/babel-helper-remap-async-to-generator/package.json

@@ -1,15 +1,15 @@
 {
   "name": "@babel/helper-remap-async-to-generator",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to remap async functions to generators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-remap-async-to-generator",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-annotate-as-pure": "7.0.0-beta.53",
-    "@babel/helper-wrap-function": "7.0.0-beta.53",
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.56",
+    "@babel/helper-wrap-function": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-replace-supers/package.json

@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-replace-supers",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to replace supers",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-replace-supers",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-member-expression-to-functions": "7.0.0-beta.53",
-    "@babel/helper-optimise-call-expression": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-member-expression-to-functions": "7.0.0-beta.56",
+    "@babel/helper-optimise-call-expression": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-simple-access/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-simple-access",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper for ensuring that access to a given value is performed through simple accesses",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,8 +8,8 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-simple-access",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53",
-    "lodash": "^4.17.5"
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
+    "lodash": "^4.17.10"
   }
 }

packages/babel-helper-split-export-declaration/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-split-export-declaration",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-split-export-declaration",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-transform-fixture-test-runner/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-transform-fixture-test-runner",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Transform test runner for @babel/helper-fixtures module",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,13 +8,13 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-transform-fixture-test-runner",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.53",
-    "@babel/core": "7.0.0-beta.53",
-    "@babel/helper-fixtures": "7.0.0-beta.53",
-    "@babel/polyfill": "7.0.0-beta.53",
+    "@babel/code-frame": "7.0.0-beta.56",
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-fixtures": "7.0.0-beta.56",
+    "@babel/polyfill": "7.0.0-beta.56",
     "jest": "^22.4.2",
     "jest-diff": "^22.4.0",
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "resolve": "^1.3.2",
     "source-map": "^0.5.0"
   }

packages/babel-helper-transform-fixture-test-runner/src/index.js

@@ -345,44 +345,44 @@ export default function(
           continue;
         }
 
-        it(
+        const testFn = task.disabled ? it.skip : it;
+
+        testFn(
           task.title,
-          !task.disabled &&
-            function() {
-              function runTask() {
-                run(task);
-              }
 
-              defaults(task.options, {
-                sourceMap: !!(task.sourceMappings || task.sourceMap),
+          function() {
+            function runTask() {
+              run(task);
+            }
+
+            defaults(task.options, {
+              sourceMap: !!(task.sourceMappings || task.sourceMap),
+            });
+
+            extend(task.options, taskOpts);
+
+            if (dynamicOpts) dynamicOpts(task.options, task);
+
+            const throwMsg = task.options.throws;
+            if (throwMsg) {
+              // internal api doesn't have this option but it's best not to pollute
+              // the options object with useless options
+              delete task.options.throws;
+
+              assert.throws(runTask, function(err) {
+                return throwMsg === true || err.message.indexOf(throwMsg) >= 0;
               });
-
-              extend(task.options, taskOpts);
-
-              if (dynamicOpts) dynamicOpts(task.options, task);
-
-              const throwMsg = task.options.throws;
-              if (throwMsg) {
-                // internal api doesn't have this option but it's best not to pollute
-                // the options object with useless options
-                delete task.options.throws;
-
-                assert.throws(runTask, function(err) {
-                  return (
-                    throwMsg === true || err.message.indexOf(throwMsg) >= 0
-                  );
-                });
-              } else {
-                if (task.exec.code) {
-                  const result = run(task);
-                  if (result && typeof result.then === "function") {
-                    return result;
-                  }
-                } else {
-                  runTask();
+            } else {
+              if (task.exec.code) {
+                const result = run(task);
+                if (result && typeof result.then === "function") {
+                  return result;
                 }
+              } else {
+                runTask();
               }
-            },
+            }
+          },
         );
       }
     });

packages/babel-helper-wrap-function/package.json

@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-wrap-function",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Helper to wrap functions inside a function call.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-wrap-function",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.53",
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/helper-function-name": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helpers/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helpers",
-  "version": "7.0.0-beta.53",
+  "version": "7.0.0-beta.56",
   "description": "Collection of helper functions used by Babel transforms.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helpers",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.53",
-    "@babel/traverse": "7.0.0-beta.53",
-    "@babel/types": "7.0.0-beta.53"
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   },
   "devDependencies": {
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.53"
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-helpers/src/helpers.js

@@ -1,9 +1,16 @@
+// @flow
+
 import template from "@babel/template";
 
-const helpers = {};
+const helpers = Object.create(null);
 export default helpers;
 
-helpers.typeof = () => template.program.ast`
+const helper = (minVersion: string) => tpl => ({
+  minVersion,
+  ast: () => template.program.ast(tpl),
+});
+
+helpers.typeof = helper("7.0.0-beta.0")`
   export default function _typeof(obj) {
     if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
       _typeof = function (obj) { return typeof obj; };
@@ -19,7 +26,7 @@ helpers.typeof = () => template.program.ast`
   }
 `;
 
-helpers.jsx = () => template.program.ast`
+helpers.jsx = helper("7.0.0-beta.0")`
   var REACT_ELEMENT_TYPE;
 
   export default function _createRawReactElement(type, props, key, children) {
@@ -70,7 +77,7 @@ helpers.jsx = () => template.program.ast`
   }
 `;
 
-helpers.asyncIterator = () => template.program.ast`
+helpers.asyncIterator = helper("7.0.0-beta.0")`
   export default function _asyncIterator(iterable) {
     var method
     if (typeof Symbol === "function") {
@@ -87,13 +94,13 @@ helpers.asyncIterator = () => template.program.ast`
   }
 `;
 
-helpers.AwaitValue = () => template.program.ast`
+helpers.AwaitValue = helper("7.0.0-beta.0")`
   export default function _AwaitValue(value) {
     this.wrapped = value;
   }
 `;
 
-helpers.AsyncGenerator = () => template.program.ast`
+helpers.AsyncGenerator = helper("7.0.0-beta.0")`
   import AwaitValue from "AwaitValue";
 
   export default function AsyncGenerator(gen) {
@@ -177,7 +184,7 @@ helpers.AsyncGenerator = () => template.program.ast`
   AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); };
 `;
 
-helpers.wrapAsyncGenerator = () => template.program.ast`
+helpers.wrapAsyncGenerator = helper("7.0.0-beta.0")`
   import AsyncGenerator from "AsyncGenerator";
 
   export default function _wrapAsyncGenerator(fn) {
@@ -187,7 +194,7 @@ helpers.wrapAsyncGenerator = () => template.program.ast`
   }
 `;
 
-helpers.awaitAsyncGenerator = () => template.program.ast`
+helpers.awaitAsyncGenerator = helper("7.0.0-beta.0")`
   import AwaitValue from "AwaitValue";
 
   export default function _awaitAsyncGenerator(value) {
@@ -195,7 +202,7 @@ helpers.awaitAsyncGenerator = () => template.program.ast`
   }
 `;
 
-helpers.asyncGeneratorDelegate = () => template.program.ast`
+helpers.asyncGeneratorDelegate = helper("7.0.0-beta.0")`
   export default function _asyncGeneratorDelegate(inner, awaitWrap) {
     var iter = {}, waiting = false;
 
@@ -237,7 +244,7 @@ helpers.asyncGeneratorDelegate = () => template.program.ast`
   }
 `;
 
-helpers.asyncToGenerator = () => template.program.ast`
+helpers.asyncToGenerator = helper("7.0.0-beta.0")`
   function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
     try {
       var info = gen[key](arg);
@@ -272,7 +279,7 @@ helpers.asyncToGenerator = () => template.program.ast`
   }
 `;
 
-helpers.classCallCheck = () => template.program.ast`
+helpers.classCallCheck = helper("7.0.0-beta.0")`
   export default function _classCallCheck(instance, Constructor) {
     if (!(instance instanceof Constructor)) {
       throw new TypeError("Cannot call a class as a function");
@@ -280,7 +287,7 @@ helpers.classCallCheck = () => template.program.ast`
   }
 `;
 
-helpers.createClass = () => template.program.ast`
+helpers.createClass = helper("7.0.0-beta.0")`
   function _defineProperties(target, props) {
     for (var i = 0; i < props.length; i ++) {
       var descriptor = props[i];
@@ -298,7 +305,7 @@ helpers.createClass = () => template.program.ast`
   }
 `;
 
-helpers.defineEnumerableProperties = () => template.program.ast`
+helpers.defineEnumerableProperties = helper("7.0.0-beta.0")`
   export default function _defineEnumerableProperties(obj, descs) {
     for (var key in descs) {
       var desc = descs[key];
@@ -324,7 +331,7 @@ helpers.defineEnumerableProperties = () => template.program.ast`
   }
 `;
 
-helpers.defaults = () => template.program.ast`
+helpers.defaults = helper("7.0.0-beta.0")`
   export default function _defaults(obj, defaults) {
     var keys = Object.getOwnPropertyNames(defaults);
     for (var i = 0; i < keys.length; i++) {
@@ -338,7 +345,7 @@ helpers.defaults = () => template.program.ast`
   }
 `;
 
-helpers.defineProperty = () => template.program.ast`
+helpers.defineProperty = helper("7.0.0-beta.0")`
   export default function _defineProperty(obj, key, value) {
     // Shortcircuit the slow defineProperty path when possible.
     // We are trying to avoid issues where setters defined on the
@@ -359,7 +366,7 @@ helpers.defineProperty = () => template.program.ast`
   }
 `;
 
-helpers.extends = () => template.program.ast`
+helpers.extends = helper("7.0.0-beta.0")`
   export default function _extends() {
     _extends = Object.assign || function (target) {
       for (var i = 1; i < arguments.length; i++) {
@@ -377,7 +384,7 @@ helpers.extends = () => template.program.ast`
   }
 `;
 
-helpers.objectSpread = () => template.program.ast`
+helpers.objectSpread = helper("7.0.0-beta.0")`
   import defineProperty from "defineProperty";
 
   export default function _objectSpread(target) {
@@ -397,7 +404,7 @@ helpers.objectSpread = () => template.program.ast`
   }
 `;
 
-helpers.inherits = () => template.program.ast`
+helpers.inherits = helper("7.0.0-beta.0")`
   import setPrototypeOf from "setPrototypeOf";
 
   export default function _inherits(subClass, superClass) {
@@ -415,7 +422,7 @@ helpers.inherits = () => template.program.ast`
   }
 `;
 
-helpers.inheritsLoose = () => template.program.ast`
+helpers.inheritsLoose = helper("7.0.0-beta.0")`
   export default function _inheritsLoose(subClass, superClass) {
     subClass.prototype = Object.create(superClass.prototype);
     subClass.prototype.constructor = subClass;
@@ -423,7 +430,7 @@ helpers.inheritsLoose = () => template.program.ast`
   }
 `;
 
-helpers.getPrototypeOf = () => template.program.ast`
+helpers.getPrototypeOf = helper("7.0.0-beta.0")`
   export default function _getPrototypeOf(o) {
     _getPrototypeOf = Object.setPrototypeOf
       ? Object.getPrototypeOf
@@ -434,7 +441,7 @@ helpers.getPrototypeOf = () => template.program.ast`
   }
 `;
 
-helpers.setPrototypeOf = () => template.program.ast`
+helpers.setPrototypeOf = helper("7.0.0-beta.0")`
   export default function _setPrototypeOf(o, p) {
     _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
       o.__proto__ = p;
@@ -444,7 +451,7 @@ helpers.setPrototypeOf = () => template.program.ast`
   }
 `;
 
-helpers.construct = () => template.program.ast`
+helpers.construct = helper("7.0.0-beta.0")`
   import setPrototypeOf from "setPrototypeOf";
 
   function isNativeReflectConstruct() {
@@ -492,7 +499,7 @@ helpers.construct = () => template.program.ast`
 `;
 
 // Based on https://github.com/WebReflection/babel-plugin-transform-builtin-classes
-helpers.wrapNativeSuper = () => template.program.ast`
+helpers.wrapNativeSuper = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import setPrototypeOf from "setPrototypeOf";
   import construct from "construct";
@@ -528,7 +535,7 @@ helpers.wrapNativeSuper = () => template.program.ast`
   }
 `;
 
-helpers.instanceof = () => template.program.ast`
+helpers.instanceof = helper("7.0.0-beta.0")`
   export default function _instanceof(left, right) {
     if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
       return right[Symbol.hasInstance](left);
@@ -538,13 +545,13 @@ helpers.instanceof = () => template.program.ast`
   }
 `;
 
-helpers.interopRequireDefault = () => template.program.ast`
+helpers.interopRequireDefault = helper("7.0.0-beta.0")`
   export default function _interopRequireDefault(obj) {
     return obj && obj.__esModule ? obj : { default: obj };
   }
 `;
 
-helpers.interopRequireWildcard = () => template.program.ast`
+helpers.interopRequireWildcard = helper("7.0.0-beta.0")`
   export default function _interopRequireWildcard(obj) {
     if (obj && obj.__esModule) {
       return obj;
@@ -570,7 +577,7 @@ helpers.interopRequireWildcard = () => template.program.ast`
   }
 `;
 
-helpers.newArrowCheck = () => template.program.ast`
+helpers.newArrowCheck = helper("7.0.0-beta.0")`
   export default function _newArrowCheck(innerThis, boundThis) {
     if (innerThis !== boundThis) {
       throw new TypeError("Cannot instantiate an arrow function");
@@ -578,13 +585,13 @@ helpers.newArrowCheck = () => template.program.ast`
   }
 `;
 
-helpers.objectDestructuringEmpty = () => template.program.ast`
+helpers.objectDestructuringEmpty = helper("7.0.0-beta.0")`
   export default function _objectDestructuringEmpty(obj) {
     if (obj == null) throw new TypeError("Cannot destructure undefined");
   }
 `;
 
-helpers.objectWithoutPropertiesLoose = () => template.program.ast`
+helpers.objectWithoutPropertiesLoose = helper("7.0.0-beta.0")`
   export default function _objectWithoutPropertiesLoose(source, excluded) {
     if (source == null) return {};
 
@@ -602,7 +609,7 @@ helpers.objectWithoutPropertiesLoose = () => template.program.ast`
   }
 `;
 
-helpers.objectWithoutProperties = () => template.program.ast`
+helpers.objectWithoutProperties = helper("7.0.0-beta.0")`
   import objectWithoutPropertiesLoose from "objectWithoutPropertiesLoose";
 
   export default function _objectWithoutProperties(source, excluded) {
@@ -625,7 +632,7 @@ helpers.objectWithoutProperties = () => template.program.ast`
   }
 `;
 
-helpers.assertThisInitialized = () => template.program.ast`
+helpers.assertThisInitialized = helper("7.0.0-beta.0")`
   export default function _assertThisInitialized(self) {
     if (self === void 0) {
       throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
@@ -634,7 +641,7 @@ helpers.assertThisInitialized = () => template.program.ast`
   }
 `;
 
-helpers.possibleConstructorReturn = () => template.program.ast`
+helpers.possibleConstructorReturn = helper("7.0.0-beta.0")`
   import assertThisInitialized from "assertThisInitialized";
 
   export default function _possibleConstructorReturn(self, call) {
@@ -645,7 +652,7 @@ helpers.possibleConstructorReturn = () => template.program.ast`
   }
 `;
 
-helpers.superPropBase = () => template.program.ast`
+helpers.superPropBase = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
 
   export default function _superPropBase(object, property) {
@@ -658,7 +665,7 @@ helpers.superPropBase = () => template.program.ast`
   }
 `;
 
-helpers.get = () => template.program.ast`
+helpers.get = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import superPropBase from "superPropBase";
 
@@ -683,7 +690,7 @@ helpers.get = () => template.program.ast`
   }
 `;
 
-helpers.set = () => template.program.ast`
+helpers.set = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import superPropBase from "superPropBase";
   import defineProperty from "defineProperty";
@@ -741,7 +748,7 @@ helpers.set = () => template.program.ast`
   }
 `;
 
-helpers.taggedTemplateLiteral = () => template.program.ast`
+helpers.taggedTemplateLiteral = helper("7.0.0-beta.0")`
   export default function _taggedTemplateLiteral(strings, raw) {
     if (!raw) { raw = strings.slice(0); }
     return Object.freeze(Object.defineProperties(strings, {
@@ -750,7 +757,7 @@ helpers.taggedTemplateLiteral = () => template.program.ast`
   }
 `;
 
-helpers.taggedTemplateLiteralLoose = () => template.program.ast`
+helpers.taggedTemplateLiteralLoose = helper("7.0.0-beta.0")`
   export default function _taggedTemplateLiteralLoose(strings, raw) {
     if (!raw) { raw = strings.slice(0); }
     strings.raw = raw;
@@ -758,7 +765,7 @@ helpers.taggedTemplateLiteralLoose = () => template.program.ast`
   }
 `;
 
-helpers.temporalRef = () => template.program.ast`
+helpers.temporalRef = helper("7.0.0-beta.0")`
   import undef from "temporalUndefined";
 
   export default function _temporalRef(val, name) {
@@ -770,23 +777,23 @@ helpers.temporalRef = () => template.program.ast`
   }
 `;
 
-helpers.readOnlyError = () => template.program.ast`
+helpers.readOnlyError = helper("7.0.0-beta.0")`
   export default function _readOnlyError(name) {
     throw new Error("\\"" + name + "\\" is read-only");
   }
 `;
 
-helpers.classNameTDZError = () => template.program.ast`
+helpers.classNameTDZError = helper("7.0.0-beta.0")`
   export default function _classNameTDZError(name) {
     throw new Error("Class \\"" + name + "\\" cannot be referenced in computed property keys.");
   }
 `;
 
-helpers.temporalUndefined = () => template.program.ast`
+helpers.temporalUndefined = helper("7.0.0-beta.0")`
   export default {};
 `;
 
-helpers.slicedToArray = () => template.program.ast`
+helpers.slicedToArray = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArrayLimit from "iterableToArrayLimit";
   import nonIterableRest from "nonIterableRest";
@@ -796,7 +803,7 @@ helpers.slicedToArray = () => template.program.ast`
   }
 `;
 
-helpers.slicedToArrayLoose = () => template.program.ast`
+helpers.slicedToArrayLoose = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArrayLimitLoose from "iterableToArrayLimitLoose";
   import nonIterableRest from "nonIterableRest";
@@ -806,7 +813,7 @@ helpers.slicedToArrayLoose = () => template.program.ast`
   }
 `;
 
-helpers.toArray = () => template.program.ast`
+helpers.toArray = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArray from "iterableToArray";
   import nonIterableRest from "nonIterableRest";
@@ -816,7 +823,7 @@ helpers.toArray = () => template.program.ast`
   }
 `;
 
-helpers.toConsumableArray = () => template.program.ast`
+helpers.toConsumableArray = helper("7.0.0-beta.0")`
   import arrayWithoutHoles from "arrayWithoutHoles";
   import iterableToArray from "iterableToArray";
   import nonIterableSpread from "nonIterableSpread";
@@ -826,7 +833,7 @@ helpers.toConsumableArray = () => template.program.ast`
   }
 `;
 
-helpers.arrayWithoutHoles = () => template.program.ast`
+helpers.arrayWithoutHoles = helper("7.0.0-beta.0")`
   export default function _arrayWithoutHoles(arr) {
     if (Array.isArray(arr)) {
       for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
@@ -835,13 +842,13 @@ helpers.arrayWithoutHoles = () => template.program.ast`
   }
 `;
 
-helpers.arrayWithHoles = () => template.program.ast`
+helpers.arrayWithHoles = helper("7.0.0-beta.0")`
   export default function _arrayWithHoles(arr) {
     if (Array.isArray(arr)) return arr;
   }
 `;
 
-helpers.iterableToArray = () => template.program.ast`
+helpers.iterableToArray = helper("7.0.0-beta.0")`
   export default function _iterableToArray(iter) {
     if (
       Symbol.iterator in Object(iter) ||
@@ -850,7 +857,7 @@ helpers.iterableToArray = () => template.program.ast`
   }
 `;
 
-helpers.iterableToArrayLimit = () => template.program.ast`
+helpers.iterableToArrayLimit = helper("7.0.0-beta.0")`
   export default function _iterableToArrayLimit(arr, i) {
     // this is an expanded form of \`for...of\` that properly supports abrupt completions of
     // iterators etc. variable names have been minimised to reduce the size of this massive
@@ -885,7 +892,7 @@ helpers.iterableToArrayLimit = () => template.program.ast`
   }
 `;
 
-helpers.iterableToArrayLimitLoose = () => template.program.ast`
+helpers.iterableToArrayLimitLoose = helper("7.0.0-beta.0")`
   export default function _iterableToArrayLimitLoose(arr, i) {
     var _arr = [];
     for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
@@ -896,19 +903,19 @@ helpers.iterableToArrayLimitLoose = () => template.program.ast`
   }
 `;
 
-helpers.nonIterableSpread = () => template.program.ast`
+helpers.nonIterableSpread = helper("7.0.0-beta.0")`
   export default function _nonIterableSpread() {
     throw new TypeError("Invalid attempt to spread non-iterable instance");
   }
 `;
 
-helpers.nonIterableRest = () => template.program.ast`
+helpers.nonIterableRest = helper("7.0.0-beta.0")`
   export default function _nonIterableRest() {
     throw new TypeError("Invalid attempt to destructure non-iterable instance");
   }
 `;
 
-helpers.skipFirstGeneratorNext = () => template.program.ast`
+helpers.skipFirstGeneratorNext = helper("7.0.0-beta.0")`
   export default function _skipFirstGeneratorNext(fn) {
     return function () {
       var it = fn.apply(this, arguments);
@@ -918,7 +925,7 @@ helpers.skipFirstGeneratorNext = () => template.program.ast`
   }
 `;
 
-helpers.toPropertyKey = () => template.program.ast`
+helpers.toPropertyKey = helper("7.0.0-beta.0")`
   export default function _toPropertyKey(key) {
     if (typeof key === "symbol") {
       return key;
@@ -932,7 +939,7 @@ helpers.toPropertyKey = () => template.program.ast`
  * Add a helper that will throw a useful error if the transform fails to detect the class
  * property assignment, so users know something failed.
  */
-helpers.initializerWarningHelper = () => template.program.ast`
+helpers.initializerWarningHelper = helper("7.0.0-beta.0")`
     export default function _initializerWarningHelper(descriptor, context){
         throw new Error(
           'Decorating class property failed. Please ensure that ' +
@@ -946,7 +953,7 @@ helpers.initializerWarningHelper = () => template.program.ast`
 /**
  * Add a helper to call as a replacement for class property definition.
  */
-helpers.initializerDefineProperty = () => template.program.ast`
+helpers.initializerDefineProperty = helper("7.0.0-beta.0")`
     export default function _initializerDefineProperty(target, property, descriptor, context){
         if (!descriptor) return;
 
@@ -963,7 +970,7 @@ helpers.initializerDefineProperty = () => template.program.ast`
  * Add a helper to take an initial descriptor, apply some decorators to it, and optionally
  * define the property.
  */
-helpers.applyDecoratedDescriptor = () => template.program.ast`
+helpers.applyDecoratedDescriptor = helper("7.0.0-beta.0")`
     export default function _applyDecoratedDescriptor(target, property, decorators, descriptor, context){
         var desc = {};
         Object['ke' + 'ys'](descriptor).forEach(function(key){
@@ -995,14 +1002,14 @@ helpers.applyDecoratedDescriptor = () => template.program.ast`
     }
 `;
 
-helpers.classPrivateFieldLooseKey = () => template.program.ast`
+helpers.classPrivateFieldLooseKey = helper("7.0.0-beta.0")`
   var id = 0;
   export default function _classPrivateFieldKey(name) {
     return "__private_" + (id++) + "_" + name;
   }
 `;
 
-helpers.classPrivateFieldLooseBase = () => template.program.ast`
+helpers.classPrivateFieldLooseBase = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldBase(receiver, privateKey) {
     if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) {
       throw new TypeError("attempted to use private field on non-instance");
@@ -1011,21 +1018,28 @@ helpers.classPrivateFieldLooseBase = () => template.program.ast`
   }
 `;
 
-helpers.classPrivateFieldGet = () => template.program.ast`
+helpers.classPrivateFieldGet = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldGet(receiver, privateMap) {
     if (!privateMap.has(receiver)) {
       throw new TypeError("attempted to get private field on non-instance");
     }
-    return privateMap.get(receiver);
+    return privateMap.get(receiver).value;
   }
 `;
 
-helpers.classPrivateFieldSet = () => template.program.ast`
+helpers.classPrivateFieldSet = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldSet(receiver, privateMap, value) {
     if (!privateMap.has(receiver)) {
       throw new TypeError("attempted to set private field on non-instance");
     }
-    privateMap.set(receiver, value);
+    var descriptor = privateMap.get(receiver);
+    if (!descriptor.writable) {
+      // This should only throw in strict mode, but class bodies are
+      // always strict and private fields can only be used inside
+      // class bodies.
+      throw new TypeError("attempted to set read only private field");
+    }
+    descriptor.value = value;
     return value;
   }
 `;

packages/babel-helpers/src/index.js

@@ -226,13 +226,19 @@ function permuteHelperAST(file, metadata, id, localBindings, getDependency) {
   });
 }
 
-const helperData = {};
+const helperData = Object.create(null);
 function loadHelper(name) {
   if (!helperData[name]) {
-    if (!helpers[name]) throw new ReferenceError(`Unknown helper ${name}`);
+    const helper = helpers[name];
+    if (!helper) {
+      throw Object.assign(new ReferenceError(`Unknown helper ${name}`), {
+        code: "BABEL_HELPER_UNKNOWN",
+        helper: name,
+      });
+    }
 
     const fn = () => {
-      return t.file(helpers[name]());
+      return t.file(helper.ast());
     };
 
     const metadata = getHelperMetadata(fn());
@@ -247,6 +253,9 @@ function loadHelper(name) {
           globals: metadata.globals,
         };
       },
+      minVersion() {
+        return helper.minVersion;
+      },
       dependencies: metadata.dependencies,
     };
   }
@@ -263,6 +272,10 @@ export function get(
   return loadHelper(name).build(getDependency, id, localBindings);
 }
 
+export function minVersion(name: string) {
+  return loadHelper(name).minVersion();
+}
+
 export function getDependencies(name: string): $ReadOnlyArray<string> {
   return Array.from(loadHelper(name).dependencies.values());
 }

packages/babel-helpers/test/helpers/define-helper.js

@@ -17,7 +17,10 @@ export default function defineHelper(
     throw new Error(`The ${id} helper is already defined.`);
   }
   Object.defineProperty(helpers, id, {
-    value: template.program(code),
+    value: {
+      minVersion: "7.0.0-beta.0",
+      ast: template.program(code),
+    },
   });
   return id;
 }