v7.2.0

Implement Smart Pipeline proposal in @babel/parser

.circleci/config.yml

@@ -34,7 +34,7 @@ jobs:
   build:
     working_directory: ~/babel
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:11
     steps:
       - checkout
       - restore-cache: *restore-yarn-cache

.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

.eslintrc.json

@@ -1,11 +1,9 @@
 {
   "root": true,
   "extends": "babel",
-  "plugins": ["prettier"],
+  "plugins": ["local-rules", "prettier"],
   "rules": {
-    "curly": ["error", "multi-line"],
-    "prettier/prettier": "error",
-    "no-case-declarations": "error"
+    "prettier/prettier": "error"
   },
   "env": {
     "node": true
@@ -14,8 +12,8 @@
     {
       "files": ["packages/*/src/**/*.js", "codemods/*/src/**/*.js"],
       "rules": {
-        "no-undefined-identifier": "error",
-        "no-deprecated-clone": "error"
+        "local-rules/no-undefined-identifier": "error",
+        "local-rules/no-deprecated-clone": "error"
       }
     },
     {
@@ -28,6 +26,13 @@
       "env": {
         "jest": true
       }
+    },
+    {
+      "files": ["packages/babel-plugin-*/src/index.js"],
+      "excludedFiles": ["packages/babel-plugin-transform-regenerator/**/*.js"],
+      "rules": {
+        "local-rules/plugin-name": "error"
+      }
     }
   ]
 }

.flowconfig

@@ -5,6 +5,7 @@
 .*/codemods/.*/lib
 .*/codemods/.*/test
 .*/node_modules/conventional-changelog-core/
+.*/node_modules/module-deps/
 
 [include]
 packages/*/src

.gitignore

@@ -1,6 +1,9 @@
 .DS_Store
 /node_modules
 /packages/*/node_modules
+/packages/*/LICENSE
+!/packages/babel-parser/LICENSE
+!/packages/babel-plugin-transform-object-assign/LICENSE
 *.log
 *.cache
 /build
@@ -12,24 +15,27 @@ 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

.prettierrc

@@ -7,7 +7,6 @@
   "bracketSpacing": true,
   "jsxBracketSameLine": false,
   "tabWidth": 2,
-  "parser": "babylon",
   "printWidth": 80,
   "overrides": [{
     "files": [
@@ -16,6 +15,7 @@
       "**/packages/*/src/**/*.js",
       "**/packages/*/test/**/*.js"
     ],
+    "parser": "babylon",
     "options": {
       "trailingComma": "all"
     }

.travis.yml

@@ -1,14 +1,12 @@
 git:
-  depth: 10
+  depth: 5
 sudo: false
 language: node_js
 cache:
   yarn: true
-  directories:
-    - node_modules
 node_js:
   # We test the latest version on circleci
-  - '9'
+  - '10'
   - '8'
   - '6'
 
@@ -20,7 +18,9 @@ env:
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash
 
-install: yarn --ignore-engines
+install:
+  # the `make test-ci` script runs this command already
+  - if [ "$JOB" != "test" ]; then yarn install; fi
 
 before_script:
   - 'if [ "$JOB" = "babel-parser-flow-tests" ]; then make bootstrap-flow; fi'

CHANGELOG.md

@@ -11,10 +11,353 @@
 
 _Note: Gaps between patch versions are faulty, broken or test releases._
 
-See [CHANGELOG - v4-v6](/.github/CHANGELOG-v4-v6.md) for the v4.x-v6.x changelog.
+See [CHANGELOG - v4](/.github/CHANGELOG-v4.md), [CHANGELOG - v5](/.github/CHANGELOG-v5.md), and [CHANGELOG - v6](/.github/CHANGELOG-v6.md) for v4.x-v6.x changes.
 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.
 
+## 7.1.2 (2018-09-28)
+
+Same as v7.1.1, except compiled against Node 6 instead of Node 8 by accident (e.g had `async functions`).
+
+## v7.1.1 (2018-09-28)
+
+> EDIT: had a publish issue here as well where it compiled against Node 8 instead of Node 6 so 7.1.2 will fix this.
+> Also force publish `@babel/runtime` and `@babel/runtime-corejs2`. We need to fix the publishing around that since Lerna doesn't pickup the `@babel/helpers` changes as there is no "dependency"
+
+#### :bug: Bug Fix
+* `babel-generator`, `babel-parser`, `babel-types`
+  * [#8755](https://github.com/babel/babel/pull/8755) TypeScript: reserve `unknown` as TSUnknownKeyword. ([@g-plane](https://github.com/g-plane))
+* `babel-plugin-transform-destructuring`
+  * [#8535](https://github.com/babel/babel/pull/8535)  Do not unpack array patterns that update a referenced binding. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-proposal-decorators`
+  * [#8742](https://github.com/babel/babel/pull/8742) [decorators] Support async and generator methods. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helpers`, `babel-plugin-proposal-decorators`
+  * [#8761](https://github.com/babel/babel/pull/8761) [decorators] Fields are enumerable. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-generator`
+  * [#8751](https://github.com/babel/babel/pull/8751) Fix some missing parens cases with OptionalMemberExpression in generator. ([@existentialism](https://github.com/existentialism))
+  * [#8727](https://github.com/babel/babel/pull/8727) Handle throw expressions in generator. ([@existentialism](https://github.com/existentialism))
+
+#### :house: Internal
+* Other
+  * [#8780](https://github.com/babel/babel/pull/8780) Run test262 tests for exportNamespaceFrom. ([@existentialism](https://github.com/existentialism))
+* `babel-helper-transform-fixture-test-runner`
+  * [#8768](https://github.com/babel/babel/pull/8768) Use babel-check-duplicated-nodes. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+## v7.1.0 (2018-09-17)
+
+Check http://babeljs.io/blog/2018/09/17/7.1.0
+
+#### :rocket: New Feature
+* `babel-cli`, `babel-core`
+  * [#8660](https://github.com/babel/babel/pull/8660) Better support monorepos by allowing users to opt into automatically resolving 'root' with `rootMode: "upward"`.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-helper-transform-fixture-test-runner`
+  * [#7582](https://github.com/babel/babel/pull/7582) Allow regular plugins/presets resolution algorithm for packages outsi…. ([@Andarist](https://github.com/Andarist))
+* `babel-helpers`, `babel-plugin-proposal-decorators`, `babel-plugin-syntax-decorators`
+  * [#7976](https://github.com/babel/babel/pull/7976) Add support for the new decorators proposal. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helpers`, `babel-plugin-proposal-class-properties`
+  * [#8205](https://github.com/babel/babel/pull/8205) Private Static Fields Features: Stage 3. ([@rricard](https://github.com/rricard))
+
+#### :bug: Bug Fix
+* `babel-parser`
+  * [#8698](https://github.com/babel/babel/pull/8698) Fix parsing of newline between 'async' and 'function'. ([@existentialism](https://github.com/existentialism))
+  * [#8677](https://github.com/babel/babel/pull/8677) Fix typescript parsing typed object shorthand methods. ([@existentialism](https://github.com/existentialism))
+* `babel-plugin-transform-typescript`
+  * [#8682](https://github.com/babel/babel/pull/8682) Fix TSParameterProperty getting lost with transform-classes. ([@existentialism](https://github.com/existentialism))
+  * [#8695](https://github.com/babel/babel/pull/8695) Adjust TSParameterProperty handling to work with transform-parameters. ([@existentialism](https://github.com/existentialism))
+  * [#8666](https://github.com/babel/babel/pull/8666) Fix typescript import elision. ([@Retsam](https://github.com/Retsam))
+* `babel-preset-env`
+  * [#8693](https://github.com/babel/babel/pull/8693) Fix es6.string.iterator mapping in babel-preset-env. ([@existentialism](https://github.com/existentialism))
+* `babel-core`, `babel-plugin-proposal-class-properties`, `babel-plugin-proposal-decorators`, `babel-plugin-transform-runtime`
+  * [#8659](https://github.com/babel/babel/pull/8659) Fix version checks in .availableHelper and transform-runtime definitions.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* Other
+  * [#8627](https://github.com/babel/babel/pull/8627) ts generator: allow reserved keywords in interfaces. ([@43081j](https://github.com/43081j))
+* `babel-plugin-transform-parameters`
+  * [#8414](https://github.com/babel/babel/pull/8414) Allow patterns as argument of RestElement. ([@microbouji](https://github.com/microbouji))
+* `babel-core`, `babel-plugin-transform-runtime`
+  * [#8624](https://github.com/babel/babel/pull/8624) Verify 'sourceMap' option with hasOwnProperty, and verify string-typed 'version'. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-helpers`, `babel-plugin-proposal-class-properties`
+  * [#8614](https://github.com/babel/babel/pull/8614) [static private] Unify loose handling of static and instance props. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :nail_care: Polish
+* `babel-plugin-transform-runtime`
+  * [#8581](https://github.com/babel/babel/pull/8581) Fix grammar in error message at @babel/plugin-transform-runtime. ([@tricknotes](https://github.com/tricknotes))
+* `babel-parser`
+  * [#8576](https://github.com/babel/babel/pull/8576) More helpful errorr message for missing decoratorsBeforeExport in parser. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :memo: Documentation
+* [#8561](https://github.com/babel/babel/pull/8561) Added pronounciation of babel. ([@siddhant1](https://github.com/siddhant1))
+
+#### :house: Internal
+* `babel-core`
+  * [#8714](https://github.com/babel/babel/pull/8714) Fix Flow error with new versionRange test.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* Other
+  * [#8679](https://github.com/babel/babel/pull/8679) remove force publish, temp tag [skip ci]. ([@hzoo](https://github.com/hzoo))
+* `babel-plugin-transform-runtime`
+  * [#8661](https://github.com/babel/babel/pull/8661) Makefile: run fix json on fix. ([@xtuc](https://github.com/xtuc))
+* `babel-*`
+  * [#8658](https://github.com/babel/babel/pull/8658) Format fixture options.json with Prettier.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-parser`
+  * [#8630](https://github.com/babel/babel/pull/8630) Bump flow to 0.80 and fix sourceType error. ([@existentialism](https://github.com/existentialism))
+  * [#8610](https://github.com/babel/babel/pull/8610) types: missing `unambiguous` sourceType. ([@xtuc](https://github.com/xtuc))
+  * [#8170](https://github.com/babel/babel/pull/8170) @babel/parser: expose a TypeScript definition file from package. ([@AviVahl](https://github.com/AviVahl))
+* `babel-*`
+  * [#8573](https://github.com/babel/babel/pull/8573) add access public to all packages [skip ci]. ([@hzoo](https://github.com/hzoo))
+
+## v7.0.1 (2018-09-11)
+
+Doing a quick patch regarding helpers versioning to prevent future issues: https://github.com/babel/babel/pull/8659
+
+## v7.0.0 (2018-08-27)
+
+No change from rc.4. Finally released as https://babeljs.io/blog/2018/08/27/7.0.0!
+
+## v7.0.0-rc.4 (2018-08-27)
+
+> Similar to removing proposals in `@babel/polyfill`, we are removing them in `transform-runtime`
+
+#### :boom: Breaking Change
+* `babel-plugin-transform-runtime`
+  * [#8547](https://github.com/babel/babel/pull/8547) Remove nonstandard functions and fake prototype methods from babel-runtime. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-parser`
+  * [#8539](https://github.com/babel/babel/pull/8539) Update parser whitespace for clarity. ([@jridgewell](https://github.com/jridgewell))
+
+#### :bug: Bug Fix
+* `babel-register`
+  * [#8553](https://github.com/babel/babel/pull/8553) bump source-map-support. ([@hzoo](https://github.com/hzoo))
+* `babel-core`
+  * [#8546](https://github.com/babel/babel/pull/8546) Default highlightCode:true for the parser highlighting.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :house: Internal
+* Other
+  * [#8554](https://github.com/babel/babel/pull/8554) Lerna: remove exact [skip ci]. ([@hzoo](https://github.com/hzoo))
+* `babel-parser`
+  * [#8540](https://github.com/babel/babel/pull/8540) Cleanup getLineInfo. ([@jridgewell](https://github.com/jridgewell))
+  * [#8541](https://github.com/babel/babel/pull/8541) Update to ES6 String methods. ([@jridgewell](https://github.com/jridgewell))
+  * [#8537](https://github.com/babel/babel/pull/8537) Flatten TokenType class hierarchy. ([@jridgewell](https://github.com/jridgewell))
+  * [#8539](https://github.com/babel/babel/pull/8539) Update parser whitespace for clarity. ([@jridgewell](https://github.com/jridgewell))
+
+## v7.0.0-rc.3 (2018-08-24)
+
+#### :boom: Breaking Change
+* `babel-preset-env`
+  * [#8509](https://github.com/babel/babel/pull/8509) Add browserslist 4 support.. ([@yavorsky](https://github.com/yavorsky))
+* `babel-plugin-transform-runtime`
+  * [#8518](https://github.com/babel/babel/pull/8518) Make 'useESModules' only toggle CJS vs ESM helpers when importing file is ESM.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :rocket: New Feature
+* `babel-plugin-transform-runtime`
+  * [#8520](https://github.com/babel/babel/pull/8520) Expose opt-in useESModules:"auto" from transform-runtime to toggle based on 'supportsStaticESM'. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-transform-classes`, `babel-preset-env`
+  * [#8501](https://github.com/babel/babel/pull/8501) [_wrapNativeSuper] Don't wrap non-native constructors. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-generator`, `babel-traverse`, `babel-types`
+  * [#8478](https://github.com/babel/babel/pull/8478) Fix path.scope.rename() to not change break clauses. ([@rafeca](https://github.com/rafeca))
+* `babel-plugin-proposal-object-rest-spread`
+  * [#8514](https://github.com/babel/babel/pull/8514) fix: object rest with default values bug. ([@jquense](https://github.com/jquense))
+* `babel-traverse`
+  * [#8505](https://github.com/babel/babel/pull/8505) Rename exported functions where name conflicts with param.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :house: Internal
+* `babel-plugin-transform-object-set-prototype-of-to-assign`
+  * [#8409](https://github.com/babel/babel/pull/8409) Add LICENSE file to published npm packages [skip ci]. ([@opichals](https://github.com/opichals))
+* Other
+  * [#8504](https://github.com/babel/babel/pull/8504) Update Babel to rc.2. ([@hzoo](https://github.com/hzoo))
+
+## v7.0.0-rc.2 (2018-08-21)
+
+A notable change is the addition of https://github.com/babel/babel/pull/8485 which enables https://github.com/babel/babel-loader/pull/660 (automatically doing `modules: false` for `@babel/preset-env` when using `babel-loader`. 
+
+#### :boom: Breaking Change
+* `babel-core`
+  * [#8470](https://github.com/babel/babel/pull/8470) Remove File#resolveModuleSource. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#8473](https://github.com/babel/babel/pull/8473) Allow babel-plugin/preset prefix to not be a prefix, when used in a scope.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-core`, `babel-parser`, `babel-plugin-syntax-decorators`
+  * [#8465](https://github.com/babel/babel/pull/8465) Require decoratorsBeforeExport option for decorators. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :rocket: New Feature
+* `babel-preset-env`
+  * [#8500](https://github.com/babel/babel/pull/8500) Add missing es7.promise.finally polyfill when using useBuiltIns: usage. ([@jsnajdr](https://github.com/jsnajdr))
+* `babel-cli`, `babel-core`, `babel-node`, `babel-preset-env`, `babel-register`
+  * [#8485](https://github.com/babel/babel/pull/8485) Allow preset-env to toggle module handling based on flags from the caller (like babel-loader). ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-core`
+  * [#8474](https://github.com/babel/babel/pull/8474) Preserve 'false'-options for disabled plugins/presets.. ([@loganfsmyth](https://github.com/loganfsmyth))
+  * [#8473](https://github.com/babel/babel/pull/8473) Allow babel-plugin/preset prefix to not be a prefix, when used in a scope.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-helper-transform-fixture-test-runner`, `babel-plugin-transform-runtime`
+  * [#8435](https://github.com/babel/babel/pull/8435) Allow transform-runtime to insert runtime references with absolute paths.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :bug: Bug Fix
+* `babel-parser`
+  * [#8488](https://github.com/babel/babel/pull/8488) Fix trailingComments for FunctionExpression that is CallExpression arguments. ([@jiaxuan](https://github.com/jiaxuan))
+* `babel-core`
+  * [#8493](https://github.com/babel/babel/pull/8493) Take top-level config source into consideration when processing nested env/overrides.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-helpers`, `babel-plugin-proposal-decorators`
+  * [#7429](https://github.com/babel/babel/pull/7429) Fix default descriptor setting for class properties with decorators. ([@yhpark](https://github.com/yhpark))
+* `babel-plugin-transform-parameters`
+  * [#8479](https://github.com/babel/babel/pull/8479) Fixes setter paratemer default value. ([@nikolayemrikh](https://github.com/nikolayemrikh))
+
+#### :nail_care: Polish
+* `babel-core`
+  * [#8494](https://github.com/babel/babel/pull/8494) Cache individual programmatic descriptors along with the overall list.. ([@loganfsmyth](https://github.com/loganfsmyth))
+  * [#8493](https://github.com/babel/babel/pull/8493) Take top-level config source into consideration when processing nested env/overrides.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :house: Internal
+* `babel-core`
+  * [#8493](https://github.com/babel/babel/pull/8493) Take top-level config source into consideration when processing nested env/overrides.. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-plugin-transform-classes`
+  * [#8472](https://github.com/babel/babel/pull/8472) Remove unused file. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+## v7.0.0-rc.1 (2018-08-09)
+
+Same as rc.0 but fixes the peerDep issue #8443. It's changed to just be ^7.0.0-0
+
+## v7.0.0-rc.0 (2018-08-09)
+
+> This had an issue with `peerDependencies` so please use `rc.1`.
+
+Alright finally at the end 🙂. Shouldn't have anymore breaking changes and going to wait some time to fix bugs/regressions
+
+> Summary: `@babel/polyfill` will not include proposal polyfills by default and fixed a regression.
+
+#### :boom: Breaking Change
+* `babel-polyfill`
+  * [#8440](https://github.com/babel/babel/pull/8440) remove proposals polyfills from default import [skip ci]. ([@hzoo](https://github.com/hzoo))
+
+> Will add this to the upgrade guide/polyfill docs. I guess we could include a `babel-upgrade` for this too, not sure.
+
+#### :bug: Bug Fix
+* `babel-cli`
+  * [#8436](https://github.com/babel/babel/pull/8436) Require v1.1.0 so that correct filter params are passed.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+## v7.0.0-beta.56 (2018-08-03)
+
+- Separate `@babel/runtime`: should work for helpers alone and opt-into core-js if necessary.
+- More details in http://babeljs.io/docs/en/next/babel-runtime, http://babeljs.io/docs/en/next/babel-plugin-transform-runtime (via https://github.com/babel/babel/pull/8266, https://github.com/babel/website/pull/1714)
+- `babel-upgrade` issue: https://github.com/babel/babel-upgrade/issues/70
+
+#### :boom: Breaking Change
+* `babel-plugin-transform-regenerator`, `babel-plugin-transform-runtime`, `babel-runtime-corejs2`, `babel-runtime`
+  * [#8266](https://github.com/babel/babel/pull/8266) Split @babel/runtime into 2 modules via @babel/runtime-corejs2. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-core`, `babel-helper-module-imports`, `babel-helpers`, `babel-plugin-external-helpers`, `babel-plugin-transform-runtime`
+  * [#8398](https://github.com/babel/babel/pull/8398) Only reference helpers from external/runtime helpers if they are known to be available.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :rocket: New Feature
+* `babel-plugin-transform-regenerator`, `babel-plugin-transform-runtime`, `babel-runtime-corejs2`, `babel-runtime`
+  * [#8266](https://github.com/babel/babel/pull/8266) Split @babel/runtime into 2 modules via @babel/runtime-corejs2. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :bug: Bug Fix
+* `babel-parser`, `babel-plugin-transform-typescript`
+  * [#8408](https://github.com/babel/babel/pull/8408) Allow TSInterfaceDeclaration to be default export. ([@existentialism](https://github.com/existentialism))
+* `babel-preset-env`
+  * [#8403](https://github.com/babel/babel/pull/8403) Ensure esmodule targets are parsed by browserslist. ([@existentialism](https://github.com/existentialism))
+* Other
+  * [#8024](https://github.com/babel/babel/pull/8024) Run transform-runtime on the standalone bundle so it stays ES5-compatible.. ([@loganfsmyth](https://github.com/loganfsmyth))
+
+#### :memo: Documentation
+* [#8412](https://github.com/babel/babel/pull/8412) Update Documentation[skip ci]. ([@leongjiameng](https://github.com/leongjiameng))
+
+## v7.0.0-beta.55 (2018-07-28)
+
+Breaking Change in beta:
+
+> Throws an error on using Stage presets: https://babeljs.io/blog/2018/07/27/removing-babels-stage-presets
+
+#### :boom: Breaking Change
+* `babel-core`, `babel-plugin-proposal-class-properties`, `babel-plugin-proposal-decorators`, `babel-preset-stage-0`, `babel-preset-stage-1`, `babel-preset-stage-2`, `babel-preset-stage-3`, `babel-standalone`
+  * [#8293](https://github.com/babel/babel/pull/8293) Remove Stage presets. ([@hzoo](https://github.com/hzoo))
+
+#### :rocket: New Feature
+* `babel-generator`, `babel-parser`, `babel-plugin-transform-typescript`, `babel-types`
+  * [#7754](https://github.com/babel/babel/pull/7754) TypeScript: Support type arguments on tagged templates. ([@andy-ms](https://github.com/andy-ms))
+
+#### :bug: Bug Fix
+* `babel-cli`, `babel-core`, `babel-generator`
+  * [#8380](https://github.com/babel/babel/pull/8380) Ensure that Identifier source mappings explicitly start and stop on the generated range. ([@loganfsmyth](https://github.com/loganfsmyth))
+* `babel-preset-env`
+  * [#8391](https://github.com/babel/babel/pull/8391) Ensure preset-env doesn't clobber browserslist defaults. ([@existentialism](https://github.com/existentialism))
+* `babel-core`
+  * [#8376](https://github.com/babel/babel/pull/8376) Fix order of optional argument reordering. ([@Qix-](https://github.com/Qix-))
+  * [#8381](https://github.com/babel/babel/pull/8381) Allow an Array for `babelrcRoots`.. ([@wtgtybhertgeghgtwtg](https://github.com/wtgtybhertgeghgtwtg))
+  * [#8342](https://github.com/babel/babel/pull/8342) Do not mutate ast. ([@thiagoarrais](https://github.com/thiagoarrais))
+* `babel-parser`
+  * [#8374](https://github.com/babel/babel/pull/8374) Correctly parse interface methods named 'static'. ([@bakkot](https://github.com/bakkot))
+
+#### :nail_care: Polish
+* `babel-parser`
+  * [#8355](https://github.com/babel/babel/pull/8355) remove .then from `dynamic import` parser exception message. ([@dnalborczyk](https://github.com/dnalborczyk))
+
+#### :house: Internal
+* `babel-core`, `babel-preset-stage-0`, `babel-preset-stage-1`, `babel-preset-stage-2`, `babel-preset-stage-3`, `babel-standalone`
+  * [#8397](https://github.com/babel/babel/pull/8397) Remove our own use of stage presets. ([@hzoo](https://github.com/hzoo))
+* `babel-helpers`, `babel-plugin-proposal-class-properties`
+  * [#8318](https://github.com/babel/babel/pull/8318) Save full descriptor instead of only value for private fields.. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-core`
+  * [#8381](https://github.com/babel/babel/pull/8381) Allow an Array for `babelrcRoots`.. ([@wtgtybhertgeghgtwtg](https://github.com/wtgtybhertgeghgtwtg))
+* `babel-cli`, `babel-core`, `babel-generator`, `babel-helper-define-map`, `babel-helper-fixtures`, `babel-helper-module-imports`, `babel-helper-module-transforms`, `babel-helper-regex`, `babel-helper-simple-access`, `babel-helper-transform-fixture-test-runner`, `babel-node`, `babel-plugin-transform-block-scoping`, `babel-register`, `babel-template`, `babel-traverse`, `babel-types`
+  * [#8377](https://github.com/babel/babel/pull/8377) Bumped lodash to 4.17.10. ([@Berkmann18](https://github.com/Berkmann18))
+
+## 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).
@@ -2199,7 +2542,7 @@ Also started Babel to compile itself with Babel 7! (We'll be working on making i
 
 #### :nail_care: Polish
 * `babel-register`
-  * [#5411](https://github.com/babel/babel/pull/5411) Seperate version env cache files. ([@pwmckenna](https://github.com/pwmckenna))
+  * [#5411](https://github.com/babel/babel/pull/5411) Separate version env cache files. ([@pwmckenna](https://github.com/pwmckenna))
 
 #### :memo: Documentation
 * `babel-plugin-transform-runtime`

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
@@ -55,7 +55,7 @@ further defined and clarified by project maintainers.
 ## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting hzoo, thejameskyle, sebastian, or loganfsmyth on [Slack](https://slack.babeljs.io/). All
+reported by contacting Henry Zhu <hi@henryzoo.com>, Logan Smyth <loganfsmyth@gmail.com> or one of the other [Babel core team members](https://babeljs.io/team). All
 complaints will be reviewed and investigated and will result in a response that
 is deemed necessary and appropriate to the circumstances. The project team is
 obligated to maintain confidentiality with regard to the reporter of an incident.

CONTRIBUTING.md

@@ -24,7 +24,7 @@ contributing, please read the
 ## Not sure where to start?
 
 - If you aren't just making a documentation change, you'll probably want to learn a bit about a few topics.
- - [ASTs](https://en.wikipedia.org/wiki/Abstract_syntax_tree) (Abstract Syntax Tree): The Babel AST [spec](https://github.com/babel/babel/blob/master/packages/babel-parser/ast/spec.md) is a bit different from [ESTree](https://github.com/estree/estree). The differences are listed [here](https://github.com/babel/babel/tree/master/packages/babel-parser#output).
+ - [ASTs](https://en.wikipedia.org/wiki/Abstract_syntax_tree) (Abstract Syntax Tree): The Babel AST [spec](https://github.com/babel/babel/blob/master/packages/babel-parser/ast/spec.md) is a bit different from [ESTree](https://github.com/estree/estree). The differences are listed [here](https://babeljs.io/docs/en/next/babel-parser.html#output).
  - Check out [`/doc`](https://github.com/babel/babel/tree/master/doc) for information about Babel's internals
  - Check out [the Babel Plugin Handbook](https://github.com/thejameskyle/babel-handbook/blob/master/translations/en/plugin-handbook.md#babel-plugin-handbook) - core plugins are written the same way as any other plugin!
  - Check out [AST Explorer](http://astexplorer.net/#/scUfOmVOG5) to learn more about ASTs or make your own plugin in the browser
@@ -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:
 
@@ -310,7 +310,7 @@ Note that the code shown in Chrome DevTools is compiled code and therefore diffe
 - Create a new issue that describes the proposal (ex: [#538](https://github.com/babel/babylon/issues/538)). Include any relevant information like proposal repo/author, examples, parsing approaches, meeting notes, presentation slides, and more.
 - The pull request should include:
   - [ ] An update to the [plugins](https://github.com/babel/babel/tree/master/packages/babel-parser#plugins) part of the readme. Add a new entry to that list for the new plugin flag (and link to the proposal)
-  - [ ] If any new nodes or modifications need to be added to the AST, update [ast/spec.md](https://github.com/babel/babel/bloc/master/packages/babel-parser/ast/spec.md)
+  - [ ] If any new nodes or modifications need to be added to the AST, update [ast/spec.md](https://github.com/babel/babel/blob/master/packages/babel-parser/ast/spec.md)
   - [ ] Make sure you use the `this.hasPlugin("plugin-name-here")` check in the babel parser so that your new plugin code only runs when that flag is turned on (not default behavior)
   - [ ] Add failing/passing tests according to spec behavior
 - Start working about the Babel transform itself!

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2014-2018 Sebastian McKenzie <sebmck@gmail.com>
+Copyright (c) 2014-2018 Sebastian McKenzie and other contributors
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

Makefile

@@ -1,6 +1,6 @@
 MAKEFLAGS = -j1
-FLOW_COMMIT = 395e045c18d537fcbbc552a96ef2cdcd70b4ab52
-TEST262_COMMIT = f90a52b39609a620c0854e0bd0b3a906c930fd17
+FLOW_COMMIT = e192e1a4793dd8e43415fbfe8046d832cb513c8b
+TEST262_COMMIT = 238c88d4a084d9928372954e2fec54af2c951281
 
 # Fix color output until TravisCI fixes https://github.com/travis-ci/travis-ci/issues/7967
 export FORCE_COLOR = true
@@ -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
@@ -47,10 +47,13 @@ flow:
 	./node_modules/.bin/flow check --strip-root
 
 lint:
-	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe --rulesdir="./scripts/eslint_rules"
+	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe
 
-fix:
-	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe --fix --rulesdir="./scripts/eslint_rules"
+fix: fix-json
+	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe --fix
+
+fix-json:
+	./node_modules/.bin/prettier "{packages,codemod}/*/test/fixtures/**/options.json" --write --loglevel warn
 
 clean: test-clean
 	rm -rf packages/babel-polyfill/browser*
@@ -79,7 +82,7 @@ test-ci-coverage:
 bootstrap-flow:
 	rm -rf ./build/flow
 	mkdir -p ./build
-	git clone --branch=master --single-branch --shallow-since=2017-01-01 https://github.com/facebook/flow.git ./build/flow
+	git clone --branch=master --single-branch --shallow-since=2018-11-01 https://github.com/facebook/flow.git ./build/flow
 	cd build/flow && git checkout $(FLOW_COMMIT)
 
 test-flow:
@@ -93,7 +96,7 @@ test-flow-update-whitelist:
 bootstrap-test262:
 	rm -rf ./build/test262
 	mkdir -p ./build
-	git clone --branch=master --single-branch --shallow-since=2017-01-01 https://github.com/tc39/test262.git ./build/test262
+	git clone --branch=master --single-branch --shallow-since=2018-11-01 https://github.com/tc39/test262.git ./build/test262
 	cd build/test262 && git checkout $(TEST262_COMMIT)
 
 test-test262:
@@ -104,23 +107,32 @@ test-test262-ci: bootstrap test-test262
 test-test262-update-whitelist:
 	node scripts/tests/test262/run_babel_parser_test262.js --update-whitelist
 
-publish:
-	git pull --rebase
+clone-license:
+	./scripts/clone-license.sh
+
+prepublish-build:
 	make clean-lib
 	rm -rf packages/babel-runtime/helpers
-	rm -rf packages/babel-runtime/core-js
-	BABEL_ENV=production make build-dist
+	rm -rf packages/babel-runtime-corejs2/helpers
+	rm -rf packages/babel-runtime-corejs2/core-js
+	BABEL_ENV=production IS_PUBLISH=true make build-dist
+	make clone-license
+
+prepublish:
+	git pull --rebase
+	make prepublish-build
 	make test
-	# not using lerna independent mode atm, so only update packages that have changed since we use ^
+
+publish: prepublish
 	# --only-explicit-updates
-	./node_modules/.bin/lerna publish --force-publish=* --exact --skip-temp-tag
+	./node_modules/.bin/lerna publish --force-publish="@babel/runtime,@babel/runtime-corejs2" --dangerously-only-publish-explicit-updates-this-is-a-custom-flag-for-babel-and-you-should-not-be-using-it-just-deal-with-more-packages-being-published-it-is-not-a-big-deal
 	make clean
 
 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

@@ -24,7 +24,7 @@
   <a href="https://medium.com/friendship-dot-js/i-peeked-into-my-node-modules-directory-and-you-wont-believe-what-happened-next-b89f63d21558"><img alt="Business Strategy Status" src="https://img.shields.io/badge/business%20model-flavortown-green.svg"></a>
 </p>
 
-Babel is a community-driven project used by many companies and projects, and is maintained by a group of [volunteers](https://babeljs.io/team). If you'd like to help support the future of the project, please consider:
+Babel (pronounced ["babble"](https://soundcloud.com/sebmck/how-to-pronounce-babel))  is a community-driven project used by many companies and projects, and is maintained by a group of [volunteers](https://babeljs.io/team). If you'd like to help support the future of the project, please consider:
 
 - Giving developer time on the project. (Message us on [Twitter](https://twitter.com/babeljs) or [Slack](https://slack.babeljs.io/) for guidance!)
 - Giving funds by becoming a sponsor (see below)!
@@ -68,6 +68,10 @@ Become a sponsor and get your logo on our README on Github with a link to your s
 
 Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://www.patreon.com/henryzhu)]
 
+## Silver
+
+<a href="https://issue.sh/?utm_medium=github&utm_campaign=babel" target="_blank"><img src="https://user-images.githubusercontent.com/5557143/43912065-c8cdff78-9c33-11e8-829a-0b4166ccc215.png"></a>
+
 ## Bronze
 
 <a href="http://teamextension.io/" target="_blank"><img src="https://teamextension.io/dist/img/logo/te-logo-compact.png" height="64"></a>
@@ -103,7 +107,7 @@ Mostly a handful of volunteers! Please check out our [team page](https://babeljs
 
 ### Looking for support?
 
-For questions and support please visit join our [Slack Community](https://slack.babeljs.io/) (you can sign-up [here](https://slack.babeljs.io/) for an invite), ask a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/babeljs), or ping us on [Twitter](https://twitter.com/babeljs).
+For questions and support please join our [Slack Community](https://slack.babeljs.io/) (you can sign-up [here](https://slack.babeljs.io/) for an invite), ask a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/babeljs), or ping us on [Twitter](https://twitter.com/babeljs).
 
 ### Is there a Babel song?
 

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/README.md

@@ -36,7 +36,7 @@ npm install --save-dev @babel/plugin-codemod-object-assign-to-object-spread
 
 **.babelrc**
 
-```json
+```jsonc
 {
   "plugins": ["@babel/plugin-codemod-object-assign-to-object-spread"]
 }

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

@@ -1,23 +1,26 @@
 {
   "name": "@babel/plugin-codemod-object-assign-to-object-spread",
-  "version": "7.0.0-beta.54",
+  "version": "7.0.0",
   "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",
+  "publishConfig": {
+    "access": "public"
+  },
   "main": "lib/index.js",
   "keywords": [
     "@babel/codemod",
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.54"
+    "@babel/plugin-syntax-object-rest-spread": "^7.0.0"
   },
   "peerDependencies": {
-    "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
+    "@babel/core": "^7.0.0-0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.54",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.54"
+    "@babel/core": "^7.0.0",
+    "@babel/helper-plugin-test-runner": "^7.0.0"
   },
   "publishConfig": {
     "access": "public"

codemods/babel-plugin-codemod-optional-catch-binding/README.md

@@ -34,7 +34,7 @@ npm install --save-dev @babel/plugin-codemod-optional-catch-binding
 
 **.babelrc**
 
-```json
+```jsonc
 {
   "plugins": ["@babel/plugin-codemod-optional-catch-binding"]
 }

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

@@ -1,22 +1,25 @@
 {
   "name": "@babel/plugin-codemod-optional-catch-binding",
-  "version": "7.0.0-beta.54",
+  "version": "7.0.0",
   "description": "Remove unused catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/codemods/babel-plugin-codemod-remove-unused-catch-binding",
   "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
   "main": "lib/index.js",
   "keywords": [
     "@babel/codemod",
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.54"
+    "@babel/plugin-syntax-optional-catch-binding": "^7.0.0"
   },
   "peerDependencies": {
-    "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
+    "@babel/core": "^7.0.0-0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.54",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.54"
+    "@babel/core": "^7.0.0",
+    "@babel/helper-plugin-test-runner": "^7.0.0"
   }
 }

eslint-local-rules.js

@@ -0,0 +1,11 @@
+"use strict";
+
+const noDeprecatedClone = require("./scripts/eslint_rules/no-deprecated-clone");
+const noUndefinedIdentifier = require("./scripts/eslint_rules/no-undefined-identifier");
+const pluginName = require("./scripts/eslint_rules/plugin-name");
+
+module.exports = {
+  "no-deprecated-clone": noDeprecatedClone,
+  "no-undefined-identifier": noUndefinedIdentifier,
+  "plugin-name": pluginName,
+};

lerna.json

@@ -1,6 +1,6 @@
 {
   "lerna": "2.11.0",
-  "version": "7.0.0-beta.54",
+  "version": "7.2.0",
   "changelog": {
     "repo": "babel/babel",
     "cacheDir": ".changelog",
@@ -18,8 +18,11 @@
     "publish": {
       "ignore": [
         "*.md",
+        "*.json",
+        "*.txt",
         "test/**",
-        "codemods/**"
+        "codemods/**",
+        "package.json"
       ]
     }
   },

lib/third-party-libs.js.flow

@@ -2,12 +2,6 @@
  * Basic declarations for the npm modules we use.
  */
 
-declare module "micromatch" {
-  declare module.exports: {
-    (Array<string>, Array<string>, ?{ nocase: boolean }): Array<string>,
-  };
-}
-
 declare module "resolve" {
   declare export default {
     sync: (string, {| basedir: string |}) => string;
@@ -32,6 +26,20 @@ 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

@@ -6,60 +6,63 @@
     "build": "make build",
     "fix": "make fix",
     "lint": "make lint",
-    "precommit": "lint-staged",
     "test": "make test"
   },
   "devDependencies": {
-    "@babel/cli": "7.0.0-beta.52",
-    "@babel/core": "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/cli": "^7.1.5",
+    "@babel/core": "^7.1.6",
+    "@babel/plugin-proposal-class-properties": "^7.1.0",
+    "@babel/plugin-proposal-export-namespace-from": "^7.0.0",
+    "@babel/plugin-proposal-numeric-separator": "^7.0.0",
+    "@babel/plugin-transform-modules-commonjs": "^7.1.0",
+    "@babel/plugin-transform-runtime": "^7.1.0",
+    "@babel/preset-env": "^7.1.6",
+    "@babel/preset-flow": "^7.0.0",
+    "@babel/register": "^7.0.0",
+    "@babel/runtime": "^7.1.5",
     "babel-core": "^7.0.0-0",
-    "babel-eslint": "^8.2.5",
-    "babel-jest": "^22.4.1",
-    "babel-loader": "8.0.0-beta.0",
+    "babel-eslint": "^10.0.1",
+    "babel-jest": "^23.6.0",
+    "babel-loader": "^8.0.4",
     "babel-plugin-transform-charcodes": "^0.1.0",
-    "browserify": "^13.1.1",
+    "browserify": "^16.2.2",
     "bundle-collapser": "^1.2.1",
     "chalk": "^2.3.2",
     "charcodes": "^0.1.0",
     "derequire": "^2.0.2",
     "enhanced-resolve": "^3.0.0",
-    "eslint": "^5.0.1",
-    "eslint-config-babel": "^7.0.2",
-    "eslint-plugin-flowtype": "^2.49.3",
-    "eslint-plugin-prettier": "^2.6.1",
-    "flow-bin": "^0.75.0",
+    "eslint": "^5.9.0",
+    "eslint-config-babel": "^8.0.2",
+    "eslint-plugin-flowtype": "^3.2.0",
+    "eslint-plugin-local-rules": "0.1.0",
+    "eslint-plugin-prettier": "^3.0.0",
+    "flow-bin": "^0.82.0",
     "graceful-fs": "^4.1.11",
     "gulp": "^4.0.0",
-    "gulp-babel": "^8.0.0-beta.2",
+    "gulp-babel": "^8.0.0",
     "gulp-filter": "^5.1.0",
     "gulp-newer": "^1.0.0",
-    "gulp-plumber": "^1.0.1",
-    "gulp-rename": "^1.2.2",
-    "gulp-uglify": "^3.0.0",
+    "gulp-plumber": "^1.2.0",
+    "gulp-rename": "^1.4.0",
+    "gulp-uglify": "^3.0.1",
     "gulp-util": "^3.0.7",
-    "gulp-watch": "^5.0.0",
-    "husky": "^0.14.3",
-    "jest": "^22.4.2",
+    "gulp-watch": "^5.0.1",
+    "husky": "^1.2.0",
+    "jest": "^23.6.0",
     "lerna": "^2.11.0",
     "lerna-changelog": "^0.5.0",
-    "lint-staged": "^6.0.1",
-    "lodash": "^4.17.5",
+    "lint-staged": "^8.1.0",
+    "lodash": "^4.17.10",
     "merge-stream": "^1.0.1",
     "output-file-sync": "^2.0.0",
-    "prettier": "1.13.2",
-    "pump": "^1.0.2",
+    "prettier": "^1.15.2",
+    "pump": "^3.0.0",
     "rimraf": "^2.4.3",
     "rollup-plugin-babel": "^4.0.0-beta.0",
     "rollup-plugin-node-resolve": "^3.0.2",
     "rollup-stream": "^1.24.1",
     "test262-stream": "^1.2.0",
     "through2": "^2.0.0",
-    "uglify-js": "^2.4.16",
     "vinyl-buffer": "^1.0.1",
     "vinyl-source-stream": "^2.0.0",
     "webpack": "^3.4.1",
@@ -67,15 +70,20 @@
     "webpack-stream": "^4.0.0"
   },
   "engines": {
-    "node": ">= 6.9.0 <= 11.0.0-0",
-    "npm": ">= 2.x <= 5.x",
+    "node": ">= 6.9.0 < 12.0.0",
+    "npm": ">= 3.x <= 6.x",
     "yarn": ">=0.27.5 || >=1.0.0-20170811"
   },
   "lint-staged": {
     "*.js": [
-      "eslint --format=codeframe --rulesdir='./scripts/eslint_rules'"
+      "eslint --format=codeframe"
     ]
   },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
   "jest": {
     "collectCoverageFrom": [
       "packages/*/src/**/*.mjs",

packages/README.md

@@ -13,10 +13,10 @@ A monorepo, muhahahahahaha. See the [monorepo design doc](/doc/design/monorepo.m
 
 | Package | Version | Dependencies |
 |--------|-------|------------|
-| [`@babel/core`](/packages/babel-core) | [![npm](https://img.shields.io/npm/v/@babel/core.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/core) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-core)](https://david-dm.org/babel/babel?path=packages/babel-core) |
-| [`@babel/parser`](/packages/@babel/parser) | [![npm](https://img.shields.io/npm/v/@babel/parser.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/parser) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-parser)](https://david-dm.org/babel/babel?path=packages/babel-parser) |
-| [`@babel/traverse`](/packages/babel-traverse) | [![npm](https://img.shields.io/npm/v/@babel/traverse.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/traverse) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-traverse)](https://david-dm.org/babel/babel?path=packages/babel-traverse) |
-| [`@babel/generator`](/packages/babel-generator) | [![npm](https://img.shields.io/npm/v/@babel/generator.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/generator) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-generator)](https://david-dm.org/babel/babel?path=packages/babel-generator) |
+| [`@babel/core`](/packages/babel-core) | [![npm](https://img.shields.io/npm/v/@babel/core.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/core) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-core)](https://david-dm.org/babel/babel?path=packages/babel-core) |
+| [`@babel/parser`](/packages/babel-parser) | [![npm](https://img.shields.io/npm/v/@babel/parser.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/parser) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-parser)](https://david-dm.org/babel/babel?path=packages/babel-parser) |
+| [`@babel/traverse`](/packages/babel-traverse) | [![npm](https://img.shields.io/npm/v/@babel/traverse.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/traverse) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-traverse)](https://david-dm.org/babel/babel?path=packages/babel-traverse) |
+| [`@babel/generator`](/packages/babel-generator) | [![npm](https://img.shields.io/npm/v/@babel/generator.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/generator) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-generator)](https://david-dm.org/babel/babel?path=packages/babel-generator) |
 
 [`@babel/core`](/packages/babel-core) is the Babel compiler itself; it exposes the `babel.transform` method, where `transformedCode = transform(src).code`.
 
@@ -36,14 +36,14 @@ Check out the [`babel-handbook`](https://github.com/thejameskyle/babel-handbook/
 
 | Package | Version | Dependencies |
 |--------|-------|------------|
-| [`@babel/cli`](/packages/babel-cli) | [![npm](https://img.shields.io/npm/v/@babel/cli.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/cli) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-cli)](https://david-dm.org/babel/babel?path=packages/babel-cli) |
-| [`@babel/types`](/packages/babel-types) | [![npm](https://img.shields.io/npm/v/@babel/types.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/types) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-types)](https://david-dm.org/babel/babel?path=packages/babel-types) |
-| [`@babel/polyfill`](/packages/babel-polyfill) | [![npm](https://img.shields.io/npm/v/@babel/polyfill.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/polyfill) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-polyfill)](https://david-dm.org/babel/babel?path=packages/babel-polyfill) |
-| [`@babel/runtime`](/packages/babel-runtime) | [![npm](https://img.shields.io/npm/v/@babel/runtime.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/runtime) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-runtime)](https://david-dm.org/babel/babel?path=packages/babel-runtime) |
-| [`@babel/register`](/packages/babel-register) | [![npm](https://img.shields.io/npm/v/@babel/register.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/register) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-register)](https://david-dm.org/babel/babel?path=packages/babel-register) |
-| [`@babel/template`](/packages/babel-template) | [![npm](https://img.shields.io/npm/v/@babel/template.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/template) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-template)](https://david-dm.org/babel/babel?path=packages/babel-template) |
-| [`@babel/helpers`](/packages/babel-helpers) | [![npm](https://img.shields.io/npm/v/@babel/helpers.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/helpers) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-helpers)](https://david-dm.org/babel/babel?path=packages/babel-helpers) |
-| [`@babel/code-frame`](/packages/babel-code-frame) | [![npm](https://img.shields.io/npm/v/@babel/code-frame.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/code-frame) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-code-frame)](https://david-dm.org/babel/babel?path=packages/babel-code-frame) |
+| [`@babel/cli`](/packages/babel-cli) | [![npm](https://img.shields.io/npm/v/@babel/cli.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/cli) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-cli)](https://david-dm.org/babel/babel?path=packages/babel-cli) |
+| [`@babel/types`](/packages/babel-types) | [![npm](https://img.shields.io/npm/v/@babel/types.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/types) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-types)](https://david-dm.org/babel/babel?path=packages/babel-types) |
+| [`@babel/polyfill`](/packages/babel-polyfill) | [![npm](https://img.shields.io/npm/v/@babel/polyfill.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/polyfill) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-polyfill)](https://david-dm.org/babel/babel?path=packages/babel-polyfill) |
+| [`@babel/runtime`](/packages/babel-runtime) | [![npm](https://img.shields.io/npm/v/@babel/runtime.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/runtime) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-runtime)](https://david-dm.org/babel/babel?path=packages/babel-runtime) |
+| [`@babel/register`](/packages/babel-register) | [![npm](https://img.shields.io/npm/v/@babel/register.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/register) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-register)](https://david-dm.org/babel/babel?path=packages/babel-register) |
+| [`@babel/template`](/packages/babel-template) | [![npm](https://img.shields.io/npm/v/@babel/template.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/template) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-template)](https://david-dm.org/babel/babel?path=packages/babel-template) |
+| [`@babel/helpers`](/packages/babel-helpers) | [![npm](https://img.shields.io/npm/v/@babel/helpers.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/helpers) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-helpers)](https://david-dm.org/babel/babel?path=packages/babel-helpers) |
+| [`@babel/code-frame`](/packages/babel-code-frame) | [![npm](https://img.shields.io/npm/v/@babel/code-frame.svg?maxAge=3600)](https://www.npmjs.com/package/@babel/code-frame) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-code-frame)](https://david-dm.org/babel/babel?path=packages/babel-code-frame) |
 
 - [`@babel/cli`](/packages/babel-cli) is the CLI tool that runs `@babel/core` and helps with outputting to a directory, a file, stdout and more (also includes `@babel/node` cli). Check out the [docs](https://babeljs.io/docs/usage/cli/).
 - [`@babel/types`](/packages/babel-types) is used to validate, build and change AST nodes.
@@ -62,7 +62,7 @@ The transformer[s] used in Babel are the independent pieces of code that transfo
 
 | Package | Version | Dependencies | Description |
 |--------|-------|------------|---|
-| [`@babel/preset-env`](/packages/babel-preset-env) | [![npm](https://img.shields.io/npm/v/@babel/preset-env.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/preset-env) | [![Dependency Status](https://david-dm.org/babel/babel/status.svg?path=packages/babel-preset-env)](https://david-dm.org/babel/babel?path=packages/babel-preset-env) | automatically determines plugins and polyfills you need based on your supported environments |
+| [`@babel/preset-env`](/packages/babel-preset-env) | [![npm](https://img.shields.io/npm/v/@babel/preset-env.svg?maxAge=?maxAge=3600)](https://www.npmjs.com/package/@babel/preset-env) | [![Dependency Status](https://david-dm.org/babel/babel/status.svg?path=packages/babel-preset-env)](https://david-dm.org/babel/babel?path=packages/babel-preset-env) | automatically determines plugins and polyfills you need based on your supported environments |
 
 > You can find community maintained presets on [npm](https://www.npmjs.com/search?q=babel-preset)
 

packages/babel-cli/package.json

@@ -1,10 +1,13 @@
 {
   "name": "@babel/cli",
-  "version": "7.0.0-beta.54",
+  "version": "7.2.0",
   "description": "Babel command line.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-cli",
   "keywords": [
     "6to5",
@@ -18,23 +21,23 @@
   "dependencies": {
     "commander": "^2.8.1",
     "convert-source-map": "^1.1.0",
-    "fs-readdir-recursive": "^1.0.0",
+    "fs-readdir-recursive": "^1.1.0",
     "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",
+    "slash": "^2.0.0",
     "source-map": "^0.5.0"
   },
   "optionalDependencies": {
     "chokidar": "^2.0.3"
   },
   "peerDependencies": {
-    "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
+    "@babel/core": "^7.0.0-0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.54",
-    "@babel/helper-fixtures": "7.0.0-beta.54"
+    "@babel/core": "^7.2.0",
+    "@babel/helper-fixtures": "^7.2.0"
   },
   "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/file.js

@@ -137,7 +137,11 @@ export default async function({ cliOptions, babelOptions }) {
         const dirname = filename;
 
         util
-          .readdirForCompilable(filename, cliOptions.includeDotfiles)
+          .readdirForCompilable(
+            filename,
+            cliOptions.includeDotfiles,
+            cliOptions.extensions,
+          )
           .forEach(function(filename) {
             _filenames.push(path.join(dirname, filename));
           });

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

@@ -28,6 +28,11 @@ commander.option(
   "The name of the 'env' to use when loading configs and plugins. " +
     "Defaults to the value of BABEL_ENV, or else NODE_ENV, or else 'development'.",
 );
+commander.option(
+  "--root-mode [mode]",
+  "The project-root resolution mode. " +
+    "One of 'root' (the default), 'upward', or 'upward-optional'.",
+);
 
 // Basic file input configuration.
 commander.option("--source-type [script|module]", "");
@@ -76,7 +81,7 @@ commander.option(
   "print a comment after any injected non-user code",
 );
 
-// General soucemap formatting.
+// General source map formatting.
 commander.option("-s, --source-maps [true|false|inline|both]", "", booleanify);
 commander.option(
   "--source-map-target [string]",
@@ -162,20 +167,20 @@ export default function parseArgv(args: Array<string>) {
 
   filenames.forEach(function(filename) {
     if (!fs.existsSync(filename)) {
-      errors.push(filename + " doesn't exist");
+      errors.push(filename + " does not exist");
     }
   });
 
   if (commander.outDir && !filenames.length) {
-    errors.push("filenames required for --out-dir");
+    errors.push("--out-dir requires filenames");
   }
 
   if (commander.outFile && commander.outDir) {
-    errors.push("cannot have --out-file and --out-dir");
+    errors.push("--out-file and --out-dir cannot be used together");
   }
 
   if (commander.relative && !commander.outDir) {
-    errors.push("output directory required for --relative");
+    errors.push("--relative requires --out-dir usage");
   }
 
   if (commander.watch) {
@@ -207,41 +212,56 @@ export default function parseArgv(args: Array<string>) {
   }
 
   if (errors.length) {
-    console.error(errors.join(". "));
+    console.error("babel:");
+    errors.forEach(function(e) {
+      console.error("  " + e);
+    });
     process.exit(2);
   }
 
   const opts = commander.opts();
 
-  return {
-    babelOptions: {
-      presets: opts.presets,
-      plugins: opts.plugins,
-      configFile: opts.configFile,
-      envName: opts.envName,
-      sourceType: opts.sourceType,
-      ignore: opts.ignore,
-      only: opts.only,
-      retainLines: opts.retainLines,
-      compact: opts.compact,
-      minified: opts.minified,
-      auxiliaryCommentBefore: opts.auxiliaryCommentBefore,
-      auxiliaryCommentAfter: opts.auxiliaryCommentAfter,
-      sourceMaps: opts.sourceMaps,
-      sourceFileName: opts.sourceFileName,
-      sourceRoot: opts.sourceRoot,
-      moduleRoot: opts.moduleRoot,
-      moduleIds: opts.moduleIds,
-      moduleId: opts.moduleId,
+  const babelOptions = {
+    presets: opts.presets,
+    plugins: opts.plugins,
+    rootMode: opts.rootMode,
+    configFile: opts.configFile,
+    envName: opts.envName,
+    sourceType: opts.sourceType,
+    ignore: opts.ignore,
+    only: opts.only,
+    retainLines: opts.retainLines,
+    compact: opts.compact,
+    minified: opts.minified,
+    auxiliaryCommentBefore: opts.auxiliaryCommentBefore,
+    auxiliaryCommentAfter: opts.auxiliaryCommentAfter,
+    sourceMaps: opts.sourceMaps,
+    sourceFileName: opts.sourceFileName,
+    sourceRoot: opts.sourceRoot,
+    moduleRoot: opts.moduleRoot,
+    moduleIds: opts.moduleIds,
+    moduleId: opts.moduleId,
 
-      // Commander will default the "--no-" arguments to true, but we want to
-      // leave them undefined so that @babel/core can handle the
-      // default-assignment logic on its own.
-      babelrc: opts.babelrc === true ? undefined : opts.babelrc,
-      highlightCode:
-        opts.highlightCode === true ? undefined : opts.highlightCode,
-      comments: opts.comments === true ? undefined : opts.comments,
-    },
+    // Commander will default the "--no-" arguments to true, but we want to
+    // leave them undefined so that @babel/core can handle the
+    // default-assignment logic on its own.
+    babelrc: opts.babelrc === true ? undefined : opts.babelrc,
+    highlightCode: opts.highlightCode === true ? undefined : opts.highlightCode,
+    comments: opts.comments === true ? undefined : opts.comments,
+  };
+
+  // If the @babel/cli version is newer than the @babel/core version, and we have added
+  // new options for @babel/core, we'll potentially get option validation errors from
+  // @babel/core. To avoid that, we delete undefined options, so @babel/core will only
+  // give the error if users actually pass an unsupported CLI option.
+  for (const key of Object.keys(babelOptions)) {
+    if (babelOptions[key] === undefined) {
+      delete babelOptions[key];
+    }
+  }
+
+  return {
+    babelOptions,
     cliOptions: {
       filename: opts.filename,
       filenames,

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

@@ -15,18 +15,25 @@ 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(
   dirname: string,
   includeDotfiles: boolean,
+  altExts?: Array<string>,
 ) {
-  return readdir(dirname, includeDotfiles, isCompilableExtension);
+  return readdir(dirname, includeDotfiles, function(filename) {
+    return isCompilableExtension(filename, altExts);
+  });
 }
 
 /**
@@ -45,9 +52,14 @@ export function addSourceMappingUrl(code, loc) {
   return code + "\n//# sourceMappingURL=" + path.basename(loc);
 }
 
+const CALLER = {
+  name: "@babel/cli",
+};
+
 export function transform(filename, code, opts) {
   opts = {
     ...opts,
+    caller: CALLER,
     filename,
   };
 
@@ -60,6 +72,11 @@ export function transform(filename, code, opts) {
 }
 
 export function compile(filename, opts) {
+  opts = {
+    ...opts,
+    caller: CALLER,
+  };
+
   return new Promise((resolve, reject) => {
     babel.transformFile(filename, opts, (err, result) => {
       if (err) reject(err);

packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/options.json

@@ -1,10 +1,12 @@
 {
   "args": [
     "src",
-    "--out-dir", "lib",
+    "--out-dir",
+    "lib",
     "--copy-files",
     "--include-dotfiles",
-    "--ignore", "src/foo",
+    "--ignore",
+    "src/foo",
     "--verbose"
   ]
 }

packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/options.json

@@ -1,10 +1,12 @@
 {
   "args": [
     "src",
-    "--out-dir", "lib",
+    "--out-dir",
+    "lib",
     "--copy-files",
     "--include-dotfiles",
-    "--only", "src/foo",
+    "--only",
+    "src/foo",
     "--verbose"
   ]
 }

packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/options.json

@@ -1,3 +1,10 @@
 {
-  "args": ["src", "--out-dir", "lib", "--copy-files", "--include-dotfiles", "--verbose"]
+  "args": [
+    "src",
+    "--out-dir",
+    "lib",
+    "--copy-files",
+    "--include-dotfiles",
+    "--verbose"
+  ]
 }

packages/babel-cli/test/fixtures/babel/--copy-files with ignore/options.json

@@ -1,9 +1,11 @@
 {
   "args": [
     "src",
-    "--out-dir", "lib",
+    "--out-dir",
+    "lib",
     "--copy-files",
-    "--ignore", "src/foo/*",
+    "--ignore",
+    "src/foo/*",
     "--verbose"
   ]
 }

packages/babel-cli/test/fixtures/babel/--copy-files with only/options.json

@@ -1,9 +1,11 @@
 {
   "args": [
     "src",
-    "--out-dir", "lib",
+    "--out-dir",
+    "lib",
     "--copy-files",
-    "--only", "src/foo/*",
+    "--only",
+    "src/foo/*",
     "--verbose"
   ]
 }

packages/babel-cli/test/fixtures/babel/.stdin --out-file --source-maps/options.json

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

packages/babel-cli/test/fixtures/babel/.stdin --source-maps inline/options.json

@@ -1,3 +0,0 @@
-{
-  "args": ["--source-maps", "inline"]
-}

packages/babel-cli/test/fixtures/babel/.stdin --source-maps inline/stdout.txt

@@ -1,7 +0,0 @@
-"use strict";
-
-arr.map(function (x) {
-  return x * x;
-});
-
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7O0FBQUEsR0FBRyxDQUFDLEdBQUcsQ0FBQyxVQUFBLENBQUM7U0FBSSxDQUFDLEdBQUcsQ0FBQztDQUFBLENBQUMsQ0FBQyIsImZpbGUiOiJzdGRvdXQiLCJzb3VyY2VzQ29udGVudCI6WyJhcnIubWFwKHggPT4geCAqIHgpOyJdfQ==

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

@@ -0,0 +1,3 @@
+class Test {
+
+}

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

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

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

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

packages/babel-cli/test/fixtures/babel/dir --out-dir --out-file/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  --out-file and --out-dir cannot be used together

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-dir no filenames/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--out-dir", "lib"]
+}

packages/babel-cli/test/fixtures/babel/dir --out-dir no filenames/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  --out-dir requires filenames

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

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

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

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

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

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

packages/babel-cli/test/fixtures/babel/dir --out-file --extensions/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/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/dir --skip-initial-build no --watch/in-files/src/bar/bar.js

@@ -0,0 +1,3 @@
+class Test {
+
+}

packages/babel-cli/test/fixtures/babel/dir --skip-initial-build no --watch/in-files/src/foo.js

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

packages/babel-cli/test/fixtures/babel/dir --skip-initial-build no --watch/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--skip-initial-build", "--out-dir", "lib"]
+}

packages/babel-cli/test/fixtures/babel/dir --skip-initial-build no --watch/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  --skip-initial-build requires --watch

packages/babel-cli/test/fixtures/babel/dir --watch no --out-dir no --out-file/in-files/src/bar/bar.js

@@ -0,0 +1,3 @@
+class Test {
+
+}

packages/babel-cli/test/fixtures/babel/dir --watch no --out-dir no --out-file/in-files/src/foo.js

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

packages/babel-cli/test/fixtures/babel/dir --watch no --out-dir no --out-file/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--watch"]
+}

packages/babel-cli/test/fixtures/babel/dir --watch no --out-dir no --out-file/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  --watch requires --out-file or --out-dir

packages/babel-cli/test/fixtures/babel/error --out-dir --out-file/stderr.txt

@@ -1 +1 @@
-filenames required for --out-dir
+--out-dir requires filenames

packages/babel-cli/test/fixtures/babel/error --out-dir/stderr.txt

@@ -1 +1 @@
-cannot have --out-file and --out-dir
+--out-file and --out-dir cannot be used together

packages/babel-cli/test/fixtures/babel/error --relative/options.json

@@ -1,4 +1,4 @@
 {
-  "args": ["--relative"],
+  "args": ["--relative", "--no-babelrc"],
   "stderrContains": true
 }

packages/babel-cli/test/fixtures/babel/error --relative/stderr.txt

@@ -1 +1 @@
-output directory required for --relative
+--relative requires --out-dir usage

packages/babel-cli/test/fixtures/babel/error wrong filename/stderr.txt

@@ -1 +1 @@
-foo.json doesn't exist
+foo.json does not exist

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 --watch no filenames/in-files/script.js

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

packages/babel-cli/test/fixtures/babel/filename --watch no filenames/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--watch", "--out-file", "out.js", "--no-babelrc"]
+}

packages/babel-cli/test/fixtures/babel/filename --watch no filenames/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  --watch requires filenames

packages/babel-cli/test/fixtures/babel/filename does not exist/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["index.js"]
+}

packages/babel-cli/test/fixtures/babel/filename does not exist/stderr.txt

@@ -0,0 +1,2 @@
+babel:
+  index.js does not exist

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/options.json

@@ -1,3 +1,10 @@
 {
-  "args": ["script.js", "script2.js", "--source-maps", "inline", "--out-file", "script3.js"]
+  "args": [
+    "script.js",
+    "script2.js",
+    "--source-maps",
+    "inline",
+    "--out-file",
+    "script3.js"
+  ]
 }

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/options.json

@@ -1,3 +1,9 @@
 {
-  "args": ["script.js", "script2.js", "--source-maps", "--out-file", "script3.js"]
+  "args": [
+    "script.js",
+    "script2.js",
+    "--source-maps",
+    "--out-file",
+    "script3.js"
+  ]
 }

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-cli/test/fixtures/babel/stdin --out-file --source-maps/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--source-maps", "--out-file", "test.js", "--no-babelrc"]
+}

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

@@ -1 +1 @@
-{"version":3,"sources":["stdin"],"names":[],"mappings":";;AAAA,GAAG,CAAC,GAAG,CAAC,UAAA,CAAC;SAAI,CAAC,GAAG,CAAC;CAAA,CAAC,CAAC","file":"test.js","sourcesContent":["arr.map(x => x * x);"]}
+{"version":3,"sources":["stdin"],"names":[],"mappings":";;AAAA,GAAG,CAAC,GAAJ,CAAQ,UAAA,CAAC;AAAA,SAAI,CAAC,GAAG,CAAR;AAAA,CAAT","file":"test.js","sourcesContent":["arr.map(x => x * x);"]}

packages/babel-cli/test/fixtures/babel/stdin --source-maps inline/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--source-maps", "inline", "--no-babelrc"]
+}

packages/babel-cli/test/fixtures/babel/stdin --source-maps inline/stdout.txt

@@ -0,0 +1,8 @@
+"use strict";
+
+arr.map(function (x) {
+  return x * x;
+});
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImFyciIsIm1hcCIsIngiXSwibWFwcGluZ3MiOiI7O0FBQUFBLEdBQUcsQ0FBQ0MsR0FBSixDQUFRLFVBQUFDLENBQUM7QUFBQSxTQUFJQSxDQUFDLEdBQUdBLENBQVI7QUFBQSxDQUFUIiwic291cmNlc0NvbnRlbnQiOlsiYXJyLm1hcCh4ID0+IHggKiB4KTsiXX0=
+
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiIsImZpbGUiOiJzdGRvdXQifQ==

packages/babel-code-frame/package.json

@@ -1,14 +1,17 @@
 {
   "name": "@babel/code-frame",
-  "version": "7.0.0-beta.54",
+  "version": "7.0.0",
   "description": "Generate errors that contain a code frame that point to source locations.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-code-frame",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/highlight": "7.0.0-beta.54"
+    "@babel/highlight": "^7.0.0"
   },
   "devDependencies": {
     "chalk": "^2.0.0",

packages/babel-core/package.json

@@ -1,11 +1,14 @@
 {
   "name": "@babel/core",
-  "version": "7.0.0-beta.54",
+  "version": "7.2.0",
   "description": "Babel compiler core.",
   "main": "lib/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-core",
   "keywords": [
     "6to5",
@@ -30,23 +33,23 @@
     "./lib/transform-file.js": "./lib/transform-file-browser.js"
   },
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.54",
-    "@babel/generator": "7.0.0-beta.54",
-    "@babel/helpers": "7.0.0-beta.54",
-    "@babel/parser": "7.0.0-beta.54",
-    "@babel/template": "7.0.0-beta.54",
-    "@babel/traverse": "7.0.0-beta.54",
-    "@babel/types": "7.0.0-beta.54",
+    "@babel/code-frame": "^7.0.0",
+    "@babel/generator": "^7.2.0",
+    "@babel/helpers": "^7.2.0",
+    "@babel/parser": "^7.2.0",
+    "@babel/template": "^7.1.2",
+    "@babel/traverse": "^7.1.6",
+    "@babel/types": "^7.2.0",
     "convert-source-map": "^1.1.0",
-    "debug": "^3.1.0",
-    "json5": "^0.5.0",
-    "lodash": "^4.17.5",
+    "debug": "^4.1.0",
+    "json5": "^2.1.0",
+    "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.54",
-    "@babel/register": "7.0.0-beta.54"
+    "@babel/helper-transform-fixture-test-runner": "^7.0.0",
+    "@babel/register": "^7.0.0"
   }
 }

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

@@ -206,12 +206,29 @@ function makeSimpleConfigurator(
       return;
     }
 
-    return cache.using(val);
+    return cache.using(() => assertSimpleType(val()));
   }
   cacheFn.forever = () => cache.forever();
   cacheFn.never = () => cache.never();
-  cacheFn.using = cb => cache.using(() => cb());
-  cacheFn.invalidate = cb => cache.invalidate(() => cb());
+  cacheFn.using = cb => cache.using(() => assertSimpleType(cb()));
+  cacheFn.invalidate = cb => cache.invalidate(() => assertSimpleType(cb()));
 
   return (cacheFn: any);
 }
+
+// Types are limited here so that in the future these values can be used
+// as part of Babel's caching logic.
+type SimpleType = string | boolean | number | null | void;
+export function assertSimpleType(value: mixed): SimpleType {
+  if (
+    value != null &&
+    typeof value !== "string" &&
+    typeof value !== "boolean" &&
+    typeof value !== "number"
+  ) {
+    throw new Error(
+      "Cache keys must be either string, boolean, number, null, or undefined.",
+    );
+  }
+  return value;
+}

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

@@ -8,6 +8,7 @@ import {
   type IgnoreList,
   type ConfigApplicableTest,
   type BabelrcSearch,
+  type CallerMetadata,
 } from "./validation/options";
 import pathPatternToRegex from "./pattern-to-regex";
 
@@ -50,12 +51,27 @@ export type ConfigContext = {
   cwd: string,
   root: string,
   envName: string,
+  caller: CallerMetadata | void,
 };
 
 /**
  * Build a config chain for a given preset.
  */
-export const buildPresetChain: (
+export function buildPresetChain(
+  arg: PresetInstance,
+  context: *,
+): ConfigChain | null {
+  const chain = buildPresetChainWalker(arg, context);
+  if (!chain) return null;
+
+  return {
+    plugins: dedupDescriptors(chain.plugins),
+    presets: dedupDescriptors(chain.presets),
+    options: chain.options.map(o => normalizeOptions(o)),
+  };
+}
+
+export const buildPresetChainWalker: (
   arg: PresetInstance,
   context: *,
 ) => * = makeChainWalker({
@@ -128,12 +144,18 @@ export function buildRootChain(
 
   let configFile;
   if (typeof opts.configFile === "string") {
-    configFile = loadConfig(opts.configFile, context.cwd, context.envName);
+    configFile = loadConfig(
+      opts.configFile,
+      context.cwd,
+      context.envName,
+      context.caller,
+    );
   } else if (opts.configFile !== false) {
-    configFile = findRootConfig(context.root, context.envName);
+    configFile = findRootConfig(context.root, context.envName, context.caller);
   }
 
   let { babelrc, babelrcRoots } = opts;
+  let babelrcRootsDirectory = context.cwd;
 
   const configFileChain = emptyChain();
   if (configFile) {
@@ -147,6 +169,7 @@ export function buildRootChain(
       babelrc = validatedFile.options.babelrc;
     }
     if (babelrcRoots === undefined) {
+      babelrcRootsDirectory = validatedFile.dirname;
       babelrcRoots = validatedFile.options.babelrcRoots;
     }
 
@@ -164,11 +187,12 @@ export function buildRootChain(
   if (
     (babelrc === true || babelrc === undefined) &&
     pkgData &&
-    babelrcLoadEnabled(context, pkgData, babelrcRoots)
+    babelrcLoadEnabled(context, pkgData, babelrcRoots, babelrcRootsDirectory)
   ) {
     ({ ignore: ignoreFile, config: babelrcFile } = findRelativeConfig(
       pkgData,
       context.envName,
+      context.caller,
     ));
 
     if (
@@ -207,6 +231,7 @@ function babelrcLoadEnabled(
   context: ConfigContext,
   pkgData: FilePackageData,
   babelrcRoots: BabelrcSearch | void,
+  babelrcRootsDirectory: string,
 ): boolean {
   if (typeof babelrcRoots === "boolean") return babelrcRoots;
 
@@ -221,7 +246,9 @@ function babelrcLoadEnabled(
   let babelrcPatterns = babelrcRoots;
   if (!Array.isArray(babelrcPatterns)) babelrcPatterns = [babelrcPatterns];
   babelrcPatterns = babelrcPatterns.map(pat => {
-    return typeof pat === "string" ? path.resolve(context.cwd, pat) : pat;
+    return typeof pat === "string"
+      ? path.resolve(babelrcRootsDirectory, pat)
+      : pat;
   });
 
   // Fast path to avoid having to match patterns if the babelrc is just
@@ -231,10 +258,12 @@ function babelrcLoadEnabled(
   }
 
   return babelrcPatterns.some(pat => {
-    if (typeof pat === "string") pat = pathPatternToRegex(pat, context.cwd);
+    if (typeof pat === "string") {
+      pat = pathPatternToRegex(pat, babelrcRootsDirectory);
+    }
 
     return pkgData.directories.some(directory => {
-      return matchPattern(pat, context.cwd, directory);
+      return matchPattern(pat, babelrcRootsDirectory, directory, context);
     });
   });
 }
@@ -449,7 +478,12 @@ function mergeExtendsChain(
 ): boolean {
   if (opts.extends === undefined) return true;
 
-  const file = loadConfig(opts.extends, dirname, context.envName);
+  const file = loadConfig(
+    opts.extends,
+    dirname,
+    context.envName,
+    context.caller,
+  );
 
   if (files.has(file)) {
     throw new Error(
@@ -515,7 +549,7 @@ function normalizeOptions(opts: ValidatedOptions): ValidatedOptions {
 
   // "sourceMap" is just aliased to sourceMap, so copy it over as
   // we merge the options together.
-  if (options.sourceMap) {
+  if (options.hasOwnProperty("sourceMap")) {
     options.sourceMaps = options.sourceMap;
     delete options.sourceMap;
   }
@@ -527,7 +561,7 @@ function dedupDescriptors(
 ): Array<UnloadedDescriptor> {
   const map: Map<
     Function,
-    Map<string | void, { value: UnloadedDescriptor | null }>,
+    Map<string | void, { value: UnloadedDescriptor }>,
   > = new Map();
 
   const descriptors = [];
@@ -542,16 +576,12 @@ function dedupDescriptors(
       }
       let desc = nameMap.get(item.name);
       if (!desc) {
-        desc = { value: null };
+        desc = { value: item };
         descriptors.push(desc);
 
         // Treat passPerPreset presets as unique, skipping them
         // in the merge processing steps.
         if (!item.ownPass) nameMap.set(item.name, desc);
-      }
-
-      if (item.options === false) {
-        desc.value = null;
       } else {
         desc.value = item;
       }
@@ -561,7 +591,7 @@ function dedupDescriptors(
   }
 
   return descriptors.reduce((acc, desc) => {
-    if (desc.value) acc.push(desc.value);
+    acc.push(desc.value);
     return acc;
   }, []);
 }
@@ -633,12 +663,23 @@ function matchesPatterns(
   dirname: string,
 ): boolean {
   return patterns.some(pattern =>
-    matchPattern(pattern, dirname, context.filename),
+    matchPattern(pattern, dirname, context.filename, context),
   );
 }
 
-function matchPattern(pattern, dirname, pathToTest): boolean {
-  if (typeof pattern === "function") return !!pattern(pathToTest);
+function matchPattern(
+  pattern,
+  dirname,
+  pathToTest,
+  context: ConfigContext,
+): boolean {
+  if (typeof pattern === "function") {
+    return !!pattern(pathToTest, {
+      dirname,
+      envName: context.envName,
+      caller: context.caller,
+    });
+  }
 
   if (typeof pathToTest !== "string") {
     throw new Error(

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

@@ -41,6 +41,22 @@ export type UnloadedDescriptor = {
   } | void,
 };
 
+function isEqualDescriptor(
+  a: UnloadedDescriptor,
+  b: UnloadedDescriptor,
+): boolean {
+  return (
+    a.name === b.name &&
+    a.value === b.value &&
+    a.options === b.options &&
+    a.dirname === b.dirname &&
+    a.alias === b.alias &&
+    a.ownPass === b.ownPass &&
+    (a.file && a.file.request) === (b.file && b.file.request) &&
+    (a.file && a.file.resolved) === (b.file && b.file.resolved)
+  );
+}
+
 export type ValidatedFile = {
   filepath: string,
   dirname: string,
@@ -50,7 +66,7 @@ export type ValidatedFile = {
 /**
  * Create a set of descriptors from a given options object, preserving
  * descriptor identity based on the identity of the plugin/preset arrays
- * themselves.
+ * themselves, and potentially on the identity of the plugins/presets + options.
  */
 export function createCachedDescriptors(
   dirname: string,
@@ -113,26 +129,82 @@ export function createUncachedDescriptors(
   };
 }
 
+const PRESET_DESCRIPTOR_CACHE = new WeakMap();
 const createCachedPresetDescriptors = makeWeakCache(
   (items: PluginList, cache: CacheConfigurator<string>) => {
     const dirname = cache.using(dir => dir);
     return makeStrongCache((alias: string) =>
       makeStrongCache((passPerPreset: boolean) =>
-        createPresetDescriptors(items, dirname, alias, passPerPreset),
+        createPresetDescriptors(items, dirname, alias, passPerPreset).map(
+          // Items are cached using the overall preset array identity when
+          // possibly, but individual descriptors are also cached if a match
+          // can be found in the previously-used descriptor lists.
+          desc => loadCachedDescriptor(PRESET_DESCRIPTOR_CACHE, desc),
+        ),
       ),
     );
   },
 );
 
+const PLUGIN_DESCRIPTOR_CACHE = new WeakMap();
 const createCachedPluginDescriptors = makeWeakCache(
   (items: PluginList, cache: CacheConfigurator<string>) => {
     const dirname = cache.using(dir => dir);
     return makeStrongCache((alias: string) =>
-      createPluginDescriptors(items, dirname, alias),
+      createPluginDescriptors(items, dirname, alias).map(
+        // Items are cached using the overall plugin array identity when
+        // possibly, but individual descriptors are also cached if a match
+        // can be found in the previously-used descriptor lists.
+        desc => loadCachedDescriptor(PLUGIN_DESCRIPTOR_CACHE, desc),
+      ),
     );
   },
 );
 
+/**
+ * When no options object is given in a descriptor, this object is used
+ * as a WeakMap key in order to have consistent identity.
+ */
+const DEFAULT_OPTIONS = {};
+
+/**
+ * Given the cache and a descriptor, returns a matching descriptor from the
+ * cache, or else returns the input descriptor and adds it to the cache for
+ * next time.
+ */
+function loadCachedDescriptor(
+  cache: WeakMap<{} | Function, WeakMap<{}, Array<UnloadedDescriptor>>>,
+  desc: UnloadedDescriptor,
+) {
+  const { value, options = DEFAULT_OPTIONS } = desc;
+  if (options === false) return desc;
+
+  let cacheByOptions = cache.get(value);
+  if (!cacheByOptions) {
+    cacheByOptions = new WeakMap();
+    cache.set(value, cacheByOptions);
+  }
+
+  let possibilities = cacheByOptions.get(options);
+  if (!possibilities) {
+    possibilities = [];
+    cacheByOptions.set(options, possibilities);
+  }
+
+  if (possibilities.indexOf(desc) === -1) {
+    const matches = possibilities.filter(possibility =>
+      isEqualDescriptor(possibility, desc),
+    );
+    if (matches.length > 0) {
+      return matches[0];
+    }
+
+    possibilities.push(desc);
+  }
+
+  return desc;
+}
+
 function createPresetDescriptors(
   items: PluginList,
   dirname: string,

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

@@ -14,6 +14,7 @@ import makeAPI from "../helpers/config-api";
 import { makeStaticFileCache } from "./utils";
 import pathPatternToRegex from "../pattern-to-regex";
 import type { FilePackageData, RelativeConfig, ConfigFile } from "./types";
+import type { CallerMetadata } from "../validation/options";
 
 const debug = buildDebug("babel:config:loading:files:configuration");
 
@@ -23,9 +24,25 @@ const BABELRC_FILENAME = ".babelrc";
 const BABELRC_JS_FILENAME = ".babelrc.js";
 const BABELIGNORE_FILENAME = ".babelignore";
 
+export function findConfigUpwards(rootDir: string): string | null {
+  let dirname = rootDir;
+  while (true) {
+    if (fs.existsSync(path.join(dirname, BABEL_CONFIG_JS_FILENAME))) {
+      return dirname;
+    }
+
+    const nextDir = path.dirname(dirname);
+    if (dirname === nextDir) break;
+    dirname = nextDir;
+  }
+
+  return null;
+}
+
 export function findRelativeConfig(
   packageData: FilePackageData,
   envName: string,
+  caller: CallerMetadata | void,
 ): RelativeConfig {
   let config = null;
   let ignore = null;
@@ -37,7 +54,7 @@ export function findRelativeConfig(
       config = [BABELRC_FILENAME, BABELRC_JS_FILENAME].reduce(
         (previousConfig: ConfigFile | null, name) => {
           const filepath = path.join(loc, name);
-          const config = readConfig(filepath, envName);
+          const config = readConfig(filepath, envName, caller);
 
           if (config && previousConfig) {
             throw new Error(
@@ -91,10 +108,11 @@ export function findRelativeConfig(
 export function findRootConfig(
   dirname: string,
   envName: string,
+  caller: CallerMetadata | void,
 ): ConfigFile | null {
   const filepath = path.resolve(dirname, BABEL_CONFIG_JS_FILENAME);
 
-  const conf = readConfig(filepath, envName);
+  const conf = readConfig(filepath, envName, caller);
   if (conf) {
     debug("Found root config %o in $o.", BABEL_CONFIG_JS_FILENAME, dirname);
   }
@@ -105,10 +123,11 @@ export function loadConfig(
   name: string,
   dirname: string,
   envName: string,
+  caller: CallerMetadata | void,
 ): ConfigFile {
   const filepath = resolve.sync(name, { basedir: dirname });
 
-  const conf = readConfig(filepath, envName);
+  const conf = readConfig(filepath, envName, caller);
   if (!conf) {
     throw new Error(`Config file ${filepath} contains no configuration data`);
   }
@@ -121,16 +140,22 @@ export function loadConfig(
  * Read the given config file, returning the result. Returns null if no config was found, but will
  * throw if there are parsing errors while loading a config.
  */
-function readConfig(filepath, envName): ConfigFile | null {
+function readConfig(filepath, envName, caller): ConfigFile | null {
   return path.extname(filepath) === ".js"
-    ? readConfigJS(filepath, { envName })
+    ? readConfigJS(filepath, { envName, caller })
     : readConfigJSON5(filepath);
 }
 
 const LOADING_CONFIGS = new Set();
 
 const readConfigJS = makeStrongCache(
-  (filepath, cache: CacheConfigurator<{ envName: string }>) => {
+  (
+    filepath,
+    cache: CacheConfigurator<{
+      envName: string,
+      caller: CallerMetadata | void,
+    }>,
+  ) => {
     if (!fs.existsSync(filepath)) {
       cache.forever();
       return null;

packages/babel-core/src/config/files/index-browser.js

@@ -7,8 +7,16 @@ import type {
   FilePackageData,
 } from "./types";
 
+import type { CallerMetadata } from "../validation/options";
+
 export type { ConfigFile, IgnoreFile, RelativeConfig, FilePackageData };
 
+export function findConfigUpwards(
+  rootDir: string, // eslint-disable-line no-unused-vars
+): string | null {
+  return null;
+}
+
 export function findPackageData(filepath: string): FilePackageData {
   return {
     filepath,
@@ -21,6 +29,7 @@ export function findPackageData(filepath: string): FilePackageData {
 export function findRelativeConfig(
   pkgData: FilePackageData, // eslint-disable-line no-unused-vars
   envName: string, // eslint-disable-line no-unused-vars
+  caller: CallerMetadata | void, // eslint-disable-line no-unused-vars
 ): RelativeConfig {
   return { pkg: null, config: null, ignore: null };
 }
@@ -28,6 +37,7 @@ export function findRelativeConfig(
 export function findRootConfig(
   dirname: string, // eslint-disable-line no-unused-vars
   envName: string, // eslint-disable-line no-unused-vars
+  caller: CallerMetadata | void, // eslint-disable-line no-unused-vars
 ): ConfigFile | null {
   return null;
 }
@@ -36,6 +46,7 @@ export function loadConfig(
   name: string,
   dirname: string,
   envName: string, // eslint-disable-line no-unused-vars
+  caller: CallerMetadata | void, // eslint-disable-line no-unused-vars
 ): ConfigFile {
   throw new Error(`Cannot load ${name} relative to ${dirname} in a browser`);
 }

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

@@ -10,6 +10,7 @@ import typeof * as indexType from "./index";
 export { findPackageData } from "./package";
 
 export {
+  findConfigUpwards,
   findRelativeConfig,
   findRootConfig,
   loadConfig,

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

@@ -15,8 +15,8 @@ const BABEL_PLUGIN_PREFIX_RE = /^(?!@|module:|[^/]+\/|babel-plugin-)/;
 const BABEL_PRESET_PREFIX_RE = /^(?!@|module:|[^/]+\/|babel-preset-)/;
 const BABEL_PLUGIN_ORG_RE = /^(@babel\/)(?!plugin-|[^/]+\/)/;
 const BABEL_PRESET_ORG_RE = /^(@babel\/)(?!preset-|[^/]+\/)/;
-const OTHER_PLUGIN_ORG_RE = /^(@(?!babel\/)[^/]+\/)(?!babel-plugin(?:-|\/|$)|[^/]+\/)/;
-const OTHER_PRESET_ORG_RE = /^(@(?!babel\/)[^/]+\/)(?!babel-preset(?:-|\/|$)|[^/]+\/)/;
+const OTHER_PLUGIN_ORG_RE = /^(@(?!babel\/)[^/]+\/)(?![^/]*babel-plugin(?:-|\/|$)|[^/]+\/)/;
+const OTHER_PRESET_ORG_RE = /^(@(?!babel\/)[^/]+\/)(?![^/]*babel-preset(?:-|\/|$)|[^/]+\/)/;
 const OTHER_ORG_DEFAULT_RE = /^(@(?!babel$)[^/]+)$/;
 
 export function resolvePlugin(name: string, dirname: string): string | null {
@@ -132,7 +132,7 @@ function resolveStandardizedName(
     } catch (e2) {}
 
     if (resolvedOppositeType) {
-      e.message += `\n- Did you accidentally pass a ${type} as a ${oppositeType}?`;
+      e.message += `\n- Did you accidentally pass a ${oppositeType} as a ${type}?`;
     }
 
     throw e;

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

@@ -13,7 +13,7 @@ import {
 import type { UnloadedDescriptor } from "./config-descriptors";
 import traverse from "@babel/traverse";
 import { makeWeakCache, type CacheConfigurator } from "./caching";
-import { validate } from "./validation/options";
+import { validate, type CallerMetadata } from "./validation/options";
 import { validatePluginObject } from "./validation/plugins";
 import makeAPI from "./helpers/config-api";
 
@@ -41,6 +41,7 @@ export type PluginPasses = Array<PluginPassList>;
 // process 'ignore'/'only' and other filename-based logic.
 type SimpleContext = {
   envName: string,
+  caller: CallerMetadata | void,
 };
 
 export default function loadFullConfig(
@@ -68,15 +69,21 @@ export default function loadFullConfig(
       },
       pass: Array<Plugin>,
     ) {
-      const plugins = config.plugins.map(descriptor => {
-        return loadPluginDescriptor(descriptor, context);
-      });
-      const presets = config.presets.map(descriptor => {
-        return {
-          preset: loadPresetDescriptor(descriptor, context),
-          pass: descriptor.ownPass ? [] : pass,
-        };
-      });
+      const plugins = config.plugins.reduce((acc, descriptor) => {
+        if (descriptor.options !== false) {
+          acc.push(loadPluginDescriptor(descriptor, context));
+        }
+        return acc;
+      }, []);
+      const presets = config.presets.reduce((acc, descriptor) => {
+        if (descriptor.options !== false) {
+          acc.push({
+            preset: loadPresetDescriptor(descriptor, context),
+            pass: descriptor.ownPass ? [] : pass,
+          });
+        }
+        return acc;
+      }, []);
 
       // resolve presets
       if (presets.length > 0) {

packages/babel-core/src/config/helpers/config-api.js

@@ -2,7 +2,13 @@
 
 import semver from "semver";
 import { version as coreVersion } from "../../";
-import type { CacheConfigurator, SimpleCacheConfigurator } from "../caching";
+import {
+  assertSimpleType,
+  type CacheConfigurator,
+  type SimpleCacheConfigurator,
+} from "../caching";
+
+import type { CallerMetadata } from "../validation/options";
 
 type EnvFunction = {
   (): string,
@@ -20,12 +26,14 @@ export type PluginAPI = {
 };
 
 export default function makeAPI(
-  cache: CacheConfigurator<{ envName: string }>,
+  cache: CacheConfigurator<{ envName: string, caller: CallerMetadata | void }>,
 ): PluginAPI {
   const env: any = value =>
     cache.using(data => {
       if (typeof value === "undefined") return data.envName;
-      if (typeof value === "function") return value(data.envName);
+      if (typeof value === "function") {
+        return assertSimpleType(value(data.envName));
+      }
       if (!Array.isArray(value)) value = [value];
 
       return value.some(entry => {
@@ -36,13 +44,18 @@ export default function makeAPI(
       });
     });
 
+  const caller: any = cb =>
+    cache.using(data => assertSimpleType(cb(data.caller)));
+
   return {
     version: coreVersion,
     cache: cache.simple(),
     // Expose ".env()" so people can easily get the same env that we expose using the "env" key.
     env,
     async: () => false,
+    caller,
     assertVersion,
+    tokTypes: undefined,
   };
 }
 

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

@@ -71,9 +71,11 @@ class ConfigItem {
 
   /**
    * The options, if any, that were passed to the item.
-   * Mutating this will lead to undefined behavior. If you need
+   * Mutating this will lead to undefined behavior.
+   *
+   * "false" means that this item has been disabled.
    */
-  options: {} | void;
+  options: {} | void | false;
 
   /**
    * The directory that the options for this item are relative to.
@@ -103,10 +105,6 @@ class ConfigItem {
     this._descriptor = descriptor;
     Object.defineProperty(this, "_descriptor", ({ enumerable: false }: any));
 
-    if (this._descriptor.options === false) {
-      throw new Error("Assertion failure - unexpected false options");
-    }
-
     this.value = this._descriptor.value;
     this.options = this._descriptor.options;
     this.dirname = this._descriptor.dirname;

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

@@ -6,9 +6,43 @@ import { mergeOptions } from "./util";
 import { createItemFromDescriptor } from "./item";
 import { buildRootChain, type ConfigContext } from "./config-chain";
 import { getEnv } from "./helpers/environment";
-import { validate, type ValidatedOptions } from "./validation/options";
+import {
+  validate,
+  type ValidatedOptions,
+  type RootMode,
+} from "./validation/options";
 
-import type { ConfigFile, IgnoreFile } from "./files";
+import { findConfigUpwards, type ConfigFile, type IgnoreFile } from "./files";
+
+function resolveRootMode(rootDir: string, rootMode: RootMode): string {
+  switch (rootMode) {
+    case "root":
+      return rootDir;
+
+    case "upward-optional": {
+      const upwardRootDir = findConfigUpwards(rootDir);
+      return upwardRootDir === null ? rootDir : upwardRootDir;
+    }
+
+    case "upward": {
+      const upwardRootDir = findConfigUpwards(rootDir);
+      if (upwardRootDir !== null) return upwardRootDir;
+
+      throw Object.assign(
+        (new Error(
+          `Babel was run with rootMode:"upward" but a root could not ` +
+            `be found when searching upward from "${rootDir}"`,
+        ): any),
+        {
+          code: "BABEL_ROOT_NOT_FOUND",
+          dirname: rootDir,
+        },
+      );
+    }
+    default:
+      throw new Error(`Assertion failure - unknown rootMode value`);
+  }
+}
 
 export default function loadPrivatePartialConfig(
   inputOpts: mixed,
@@ -28,9 +62,18 @@ export default function loadPrivatePartialConfig(
 
   const args = inputOpts ? validate("arguments", inputOpts) : {};
 
-  const { envName = getEnv(), cwd = ".", root: rootDir = "." } = args;
+  const {
+    envName = getEnv(),
+    cwd = ".",
+    root: rootDir = ".",
+    rootMode = "root",
+    caller,
+  } = args;
   const absoluteCwd = path.resolve(cwd);
-  const absoluteRootDir = path.resolve(absoluteCwd, rootDir);
+  const absoluteRootDir = resolveRootMode(
+    path.resolve(absoluteCwd, rootDir),
+    rootMode,
+  );
 
   const context: ConfigContext = {
     filename:
@@ -40,6 +83,7 @@ export default function loadPrivatePartialConfig(
     cwd: absoluteCwd,
     root: absoluteRootDir,
     envName,
+    caller,
   };
 
   const configChain = buildRootChain(args, context);

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

@@ -13,16 +13,70 @@ import type {
   SourceTypeOption,
   CompactOption,
   RootInputSourceMapOption,
+  NestingPath,
+  CallerMetadata,
+  RootMode,
 } from "./options";
 
 export type ValidatorSet = {
   [string]: Validator<any>,
 };
 
-export type Validator<T> = (string, mixed) => T;
+export type Validator<T> = (OptionPath, mixed) => T;
+
+export function msg(loc: NestingPath | GeneralPath) {
+  switch (loc.type) {
+    case "root":
+      return ``;
+    case "env":
+      return `${msg(loc.parent)}.env["${loc.name}"]`;
+    case "overrides":
+      return `${msg(loc.parent)}.overrides[${loc.index}]`;
+    case "option":
+      return `${msg(loc.parent)}.${loc.name}`;
+    case "access":
+      return `${msg(loc.parent)}[${JSON.stringify(loc.name)}]`;
+    default:
+      throw new Error(`Assertion failure: Unknown type ${loc.type}`);
+  }
+}
+
+export function access(loc: GeneralPath, name: string | number): AccessPath {
+  return {
+    type: "access",
+    name,
+    parent: loc,
+  };
+}
+
+export type OptionPath = $ReadOnly<{
+  type: "option",
+  name: string,
+  parent: NestingPath,
+}>;
+type AccessPath = $ReadOnly<{
+  type: "access",
+  name: string | number,
+  parent: GeneralPath,
+}>;
+type GeneralPath = OptionPath | AccessPath;
+
+export function assertRootMode(loc: OptionPath, value: mixed): RootMode | void {
+  if (
+    value !== undefined &&
+    value !== "root" &&
+    value !== "upward" &&
+    value !== "upward-optional"
+  ) {
+    throw new Error(
+      `${msg(loc)} must be a "root", "upward", "upward-optional" or undefined`,
+    );
+  }
+  return value;
+}
 
 export function assertSourceMaps(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): SourceMapsOption | void {
   if (
@@ -32,21 +86,24 @@ export function assertSourceMaps(
     value !== "both"
   ) {
     throw new Error(
-      `.${key} must be a boolean, "inline", "both", or undefined`,
+      `${msg(loc)} must be a boolean, "inline", "both", or undefined`,
     );
   }
   return value;
 }
 
-export function assertCompact(key: string, value: mixed): CompactOption | void {
+export function assertCompact(
+  loc: OptionPath,
+  value: mixed,
+): CompactOption | void {
   if (value !== undefined && typeof value !== "boolean" && value !== "auto") {
-    throw new Error(`.${key} must be a boolean, "auto", or undefined`);
+    throw new Error(`${msg(loc)} must be a boolean, "auto", or undefined`);
   }
   return value;
 }
 
 export function assertSourceType(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): SourceTypeOption | void {
   if (
@@ -56,14 +113,49 @@ export function assertSourceType(
     value !== "unambiguous"
   ) {
     throw new Error(
-      `.${key} must be "module", "script", "unambiguous", or undefined`,
+      `${msg(loc)} must be "module", "script", "unambiguous", or undefined`,
     );
   }
   return value;
 }
 
+export function assertCallerMetadata(
+  loc: OptionPath,
+  value: mixed,
+): CallerMetadata | void {
+  const obj = assertObject(loc, value);
+  if (obj) {
+    if (typeof obj[("name": string)] !== "string") {
+      throw new Error(
+        `${msg(loc)} set but does not contain "name" property string`,
+      );
+    }
+
+    for (const prop of Object.keys(obj)) {
+      const propLoc = access(loc, prop);
+      const value = obj[prop];
+      if (
+        value != null &&
+        typeof value !== "boolean" &&
+        typeof value !== "string" &&
+        typeof value !== "number"
+      ) {
+        // NOTE(logan): I'm limiting the type here so that we can guarantee that
+        // the "caller" value will serialize to JSON nicely. We can always
+        // allow more complex structures later though.
+        throw new Error(
+          `${msg(
+            propLoc,
+          )} must be null, undefined, a boolean, a string, or a number.`,
+        );
+      }
+    }
+  }
+  return (value: any);
+}
+
 export function assertInputSourceMap(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): RootInputSourceMapOption | void {
   if (
@@ -71,75 +163,82 @@ export function assertInputSourceMap(
     typeof value !== "boolean" &&
     (typeof value !== "object" || !value)
   ) {
-    throw new Error(".inputSourceMap must be a boolean, object, or undefined");
+    throw new Error(`${msg(loc)} must be a boolean, object, or undefined`);
   }
   return value;
 }
 
-export function assertString(key: string, value: mixed): string | void {
+export function assertString(loc: GeneralPath, value: mixed): string | void {
   if (value !== undefined && typeof value !== "string") {
-    throw new Error(`.${key} must be a string, or undefined`);
+    throw new Error(`${msg(loc)} must be a string, or undefined`);
   }
   return value;
 }
 
-export function assertFunction(key: string, value: mixed): Function | void {
+export function assertFunction(
+  loc: GeneralPath,
+  value: mixed,
+): Function | void {
   if (value !== undefined && typeof value !== "function") {
-    throw new Error(`.${key} must be a function, or undefined`);
+    throw new Error(`${msg(loc)} must be a function, or undefined`);
   }
   return value;
 }
 
-export function assertBoolean(key: string, value: mixed): boolean | void {
+export function assertBoolean(loc: GeneralPath, value: mixed): boolean | void {
   if (value !== undefined && typeof value !== "boolean") {
-    throw new Error(`.${key} must be a boolean, or undefined`);
+    throw new Error(`${msg(loc)} must be a boolean, or undefined`);
   }
   return value;
 }
 
-export function assertObject(key: string, value: mixed): {} | void {
+export function assertObject(loc: GeneralPath, value: mixed): {} | void {
   if (
     value !== undefined &&
     (typeof value !== "object" || Array.isArray(value) || !value)
   ) {
-    throw new Error(`.${key} must be an object, or undefined`);
+    throw new Error(`${msg(loc)} must be an object, or undefined`);
   }
   return value;
 }
 
-export function assertArray(key: string, value: mixed): ?$ReadOnlyArray<mixed> {
+export function assertArray(
+  loc: GeneralPath,
+  value: mixed,
+): ?$ReadOnlyArray<mixed> {
   if (value != null && !Array.isArray(value)) {
-    throw new Error(`.${key} must be an array, or undefined`);
+    throw new Error(`${msg(loc)} must be an array, or undefined`);
   }
   return value;
 }
 
-export function assertIgnoreList(key: string, value: mixed): IgnoreList | void {
-  const arr = assertArray(key, value);
+export function assertIgnoreList(
+  loc: OptionPath,
+  value: mixed,
+): IgnoreList | void {
+  const arr = assertArray(loc, value);
   if (arr) {
-    arr.forEach((item, i) => assertIgnoreItem(key, i, item));
+    arr.forEach((item, i) => assertIgnoreItem(access(loc, i), item));
   }
   return (arr: any);
 }
-function assertIgnoreItem(
-  key: string,
-  index: number,
-  value: mixed,
-): IgnoreItem {
+function assertIgnoreItem(loc: GeneralPath, value: mixed): IgnoreItem {
   if (
     typeof value !== "string" &&
     typeof value !== "function" &&
     !(value instanceof RegExp)
   ) {
     throw new Error(
-      `.${key}[${index}] must be an array of string/Funtion/RegExp values, or undefined`,
+      `${msg(
+        loc,
+      )} must be an array of string/Funtion/RegExp values, or undefined`,
     );
   }
   return value;
 }
 
 export function assertConfigApplicableTest(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): ConfigApplicableTest | void {
   if (value === undefined) return value;
@@ -147,12 +246,14 @@ export function assertConfigApplicableTest(
   if (Array.isArray(value)) {
     value.forEach((item, i) => {
       if (!checkValidTest(item)) {
-        throw new Error(`.${key}[${i}] must be a string/Function/RegExp.`);
+        throw new Error(
+          `${msg(access(loc, i))} must be a string/Function/RegExp.`,
+        );
       }
     });
   } else if (!checkValidTest(value)) {
     throw new Error(
-      `.${key} must be a string/Function/RegExp, or an array of those`,
+      `${msg(loc)} must be a string/Function/RegExp, or an array of those`,
     );
   }
   return (value: any);
@@ -167,7 +268,7 @@ function checkValidTest(value: mixed): boolean {
 }
 
 export function assertConfigFileSearch(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): ConfigFileSearch | void {
   if (
@@ -176,7 +277,7 @@ export function assertConfigFileSearch(
     typeof value !== "string"
   ) {
     throw new Error(
-      `.${key} must be a undefined, a boolean, a string, ` +
+      `${msg(loc)} must be a undefined, a boolean, a string, ` +
         `got ${JSON.stringify(value)}`,
     );
   }
@@ -185,52 +286,51 @@ export function assertConfigFileSearch(
 }
 
 export function assertBabelrcSearch(
-  key: string,
+  loc: OptionPath,
   value: mixed,
 ): BabelrcSearch | void {
   if (value === undefined || typeof value === "boolean") return value;
 
   if (Array.isArray(value)) {
     value.forEach((item, i) => {
-      if (!checkValidTest(value)) {
-        throw new Error(`.${key}[${i}] must be a string/Function/RegExp.`);
+      if (!checkValidTest(item)) {
+        throw new Error(
+          `${msg(access(loc, i))} must be a string/Function/RegExp.`,
+        );
       }
     });
   } else if (!checkValidTest(value)) {
     throw new Error(
-      `.${key} must be a undefined, a boolean, a string/Function/RegExp ` +
+      `${msg(loc)} must be a undefined, a boolean, a string/Function/RegExp ` +
         `or an array of those, got ${JSON.stringify(value)}`,
     );
   }
   return (value: any);
 }
 
-export function assertPluginList(key: string, value: mixed): PluginList | void {
-  const arr = assertArray(key, value);
+export function assertPluginList(
+  loc: OptionPath,
+  value: mixed,
+): PluginList | void {
+  const arr = assertArray(loc, value);
   if (arr) {
     // Loop instead of using `.map` in order to preserve object identity
     // for plugin array for use during config chain processing.
-    arr.forEach((item, i) => assertPluginItem(key, i, item));
+    arr.forEach((item, i) => assertPluginItem(access(loc, i), item));
   }
   return (arr: any);
 }
-function assertPluginItem(
-  key: string,
-  index: number,
-  value: mixed,
-): PluginItem {
+function assertPluginItem(loc: GeneralPath, value: mixed): PluginItem {
   if (Array.isArray(value)) {
     if (value.length === 0) {
-      throw new Error(`.${key}[${index}] must include an object`);
+      throw new Error(`${msg(loc)} must include an object`);
     }
 
     if (value.length > 3) {
-      throw new Error(
-        `.${key}[${index}] may only be a two-tuple or three-tuple`,
-      );
+      throw new Error(`${msg(loc)} may only be a two-tuple or three-tuple`);
     }
 
-    assertPluginTarget(key, index, true, value[0]);
+    assertPluginTarget(access(loc, 0), value[0]);
 
     if (value.length > 1) {
       const opts = value[1];
@@ -240,38 +340,31 @@ function assertPluginItem(
         (typeof opts !== "object" || Array.isArray(opts))
       ) {
         throw new Error(
-          `.${key}[${index}][1] must be an object, false, or undefined`,
+          `${msg(access(loc, 1))} must be an object, false, or undefined`,
         );
       }
     }
     if (value.length === 3) {
       const name = value[2];
       if (name !== undefined && typeof name !== "string") {
-        throw new Error(`.${key}[${index}][2] must be a string, or undefined`);
+        throw new Error(
+          `${msg(access(loc, 2))} must be a string, or undefined`,
+        );
       }
     }
   } else {
-    assertPluginTarget(key, index, false, value);
+    assertPluginTarget(loc, value);
   }
 
   return (value: any);
 }
-function assertPluginTarget(
-  key: string,
-  index: number,
-  inArray: boolean,
-  value: mixed,
-): PluginTarget {
+function assertPluginTarget(loc: GeneralPath, value: mixed): PluginTarget {
   if (
     (typeof value !== "object" || !value) &&
     typeof value !== "string" &&
     typeof value !== "function"
   ) {
-    throw new Error(
-      `.${key}[${index}]${
-        inArray ? `[0]` : ""
-      } must be a string, object, function`,
-    );
+    throw new Error(`${msg(loc)} must be a string, object, function`);
   }
   return value;
 }

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

@@ -5,10 +5,13 @@ import Plugin from "../plugin";
 
 import removed from "./removed";
 import {
+  msg,
+  access,
   assertString,
   assertBoolean,
   assertObject,
   assertArray,
+  assertCallerMetadata,
   assertInputSourceMap,
   assertIgnoreList,
   assertPluginList,
@@ -16,20 +19,28 @@ import {
   assertConfigFileSearch,
   assertBabelrcSearch,
   assertFunction,
+  assertRootMode,
   assertSourceMaps,
   assertCompact,
   assertSourceType,
   type ValidatorSet,
   type Validator,
+  type OptionPath,
 } from "./option-assertions";
 
 const ROOT_VALIDATORS: ValidatorSet = {
   cwd: (assertString: Validator<$PropertyType<ValidatedOptions, "cwd">>),
   root: (assertString: Validator<$PropertyType<ValidatedOptions, "root">>),
+  rootMode: (assertRootMode: Validator<
+    $PropertyType<ValidatedOptions, "rootMode">,
+  >),
   configFile: (assertConfigFileSearch: Validator<
     $PropertyType<ValidatedOptions, "configFile">,
   >),
 
+  caller: (assertCallerMetadata: Validator<
+    $PropertyType<ValidatedOptions, "caller">,
+  >),
   filename: (assertString: Validator<
     $PropertyType<ValidatedOptions, "filename">,
   >),
@@ -169,10 +180,12 @@ export type ValidatedOptions = {
   babelrcRoots?: BabelrcSearch,
   configFile?: ConfigFileSearch,
   root?: string,
+  rootMode?: RootMode,
   code?: boolean,
   ast?: boolean,
   inputSourceMap?: RootInputSourceMapOption,
   envName?: string,
+  caller?: CallerMetadata,
 
   extends?: string,
   env?: EnvSet<ValidatedOptions>,
@@ -222,6 +235,11 @@ export type ValidatedOptions = {
   generatorOpts?: {},
 };
 
+export type CallerMetadata = {
+  // If 'caller' is specified, require that the name is given for debugging
+  // messages.
+  name: string,
+};
 export type EnvSet<T> = {
   [string]: ?T,
 };
@@ -247,25 +265,64 @@ export type SourceMapsOption = boolean | "inline" | "both";
 export type SourceTypeOption = "module" | "script" | "unambiguous";
 export type CompactOption = boolean | "auto";
 export type RootInputSourceMapOption = {} | boolean;
+export type RootMode = "root" | "upward" | "upward-optional";
 
-export type OptionsType =
+export type OptionsSource =
   | "arguments"
-  | "env"
-  | "preset"
-  | "override"
   | "configfile"
   | "babelrcfile"
-  | "extendsfile";
+  | "extendsfile"
+  | "preset";
+
+type RootPath = $ReadOnly<{
+  type: "root",
+  source: OptionsSource,
+}>;
+type OverridesPath = $ReadOnly<{
+  type: "overrides",
+  index: number,
+  parent: RootPath,
+}>;
+type EnvPath = $ReadOnly<{
+  type: "env",
+  name: string,
+  parent: RootPath | OverridesPath,
+}>;
+export type NestingPath = RootPath | OverridesPath | EnvPath;
+
+function getSource(loc: NestingPath): OptionsSource {
+  return loc.type === "root" ? loc.source : getSource(loc.parent);
+}
+
+export function validate(type: OptionsSource, opts: {}): ValidatedOptions {
+  return validateNested(
+    {
+      type: "root",
+      source: type,
+    },
+    opts,
+  );
+}
+
+function validateNested(loc: NestingPath, opts: {}) {
+  const type = getSource(loc);
 
-export function validate(type: OptionsType, opts: {}): ValidatedOptions {
   assertNoDuplicateSourcemap(opts);
 
   Object.keys(opts).forEach(key => {
+    const optLoc = {
+      type: "option",
+      name: key,
+      parent: loc,
+    };
+
     if (type === "preset" && NONPRESET_VALIDATORS[key]) {
-      throw new Error(`.${key} is not allowed in preset options`);
+      throw new Error(`${msg(optLoc)} is not allowed in preset options`);
     }
     if (type !== "arguments" && ROOT_VALIDATORS[key]) {
-      throw new Error(`.${key} is only allowed in root programmatic options`);
+      throw new Error(
+        `${msg(optLoc)} is only allowed in root programmatic options`,
+      );
     }
     if (
       type !== "arguments" &&
@@ -274,48 +331,47 @@ export function validate(type: OptionsType, opts: {}): ValidatedOptions {
     ) {
       if (type === "babelrcfile" || type === "extendsfile") {
         throw new Error(
-          `.${key} is not allowed in .babelrc or "extend"ed files, only in root programmatic options, ` +
+          `${msg(
+            optLoc,
+          )} is not allowed in .babelrc or "extends"ed files, only in root programmatic options, ` +
             `or babel.config.js/config file options`,
         );
       }
 
       throw new Error(
-        `.${key} is only allowed in root programmatic options, or babel.config.js/config file options`,
+        `${msg(
+          optLoc,
+        )} is only allowed in root programmatic options, or babel.config.js/config file options`,
       );
     }
-    if (type === "env" && key === "env") {
-      throw new Error(`.${key} is not allowed inside another env block`);
-    }
-    if (type === "env" && key === "overrides") {
-      throw new Error(`.${key} is not allowed inside an env block`);
-    }
-    if (type === "override" && key === "overrides") {
-      throw new Error(`.${key} is not allowed inside an overrides block`);
-    }
 
     const validator =
       COMMON_VALIDATORS[key] ||
       NONPRESET_VALIDATORS[key] ||
       BABELRC_VALIDATORS[key] ||
-      ROOT_VALIDATORS[key];
+      ROOT_VALIDATORS[key] ||
+      throwUnknownError;
 
-    if (validator) validator(key, opts[key]);
-    else throw buildUnknownError(key);
+    validator(optLoc, opts[key]);
   });
 
   return (opts: any);
 }
 
-function buildUnknownError(key: string) {
+function throwUnknownError(loc: OptionPath) {
+  const key = loc.name;
+
   if (removed[key]) {
     const { message, version = 5 } = removed[key];
 
     throw new ReferenceError(
-      `Using removed Babel ${version} option: .${key} - ${message}`,
+      `Using removed Babel ${version} option: ${msg(loc)} - ${message}`,
     );
   } else {
     // eslint-disable-next-line max-len
-    const unknownOptErr = `Unknown option: .${key}. Check out http://babeljs.io/docs/usage/options/ for more information about options.`;
+    const unknownOptErr = `Unknown option: ${msg(
+      loc,
+    )}. Check out https://babeljs.io/docs/en/babel-core/#options for more information about options.`;
 
     throw new ReferenceError(unknownOptErr);
   }
@@ -331,27 +387,53 @@ function assertNoDuplicateSourcemap(opts: {}): void {
   }
 }
 
-function assertEnvSet(key: string, value: mixed): EnvSet<ValidatedOptions> {
-  const obj = assertObject(key, value);
+function assertEnvSet(loc: OptionPath, value: mixed): EnvSet<ValidatedOptions> {
+  if (loc.parent.type === "env") {
+    throw new Error(`${msg(loc)} is not allowed inside of another .env block`);
+  }
+  const parent: RootPath | OverridesPath = loc.parent;
+
+  const obj = assertObject(loc, value);
   if (obj) {
     // Validate but don't copy the .env object in order to preserve
     // object identity for use during config chain processing.
-    for (const key of Object.keys(obj)) {
-      const env = assertObject(key, obj[key]);
-      if (env) validate("env", env);
+    for (const envName of Object.keys(obj)) {
+      const env = assertObject(access(loc, envName), obj[envName]);
+      if (!env) continue;
+
+      const envLoc = {
+        type: "env",
+        name: envName,
+        parent,
+      };
+      validateNested(envLoc, env);
     }
   }
   return (obj: any);
 }
 
-function assertOverridesList(key: string, value: mixed): OverridesList {
-  const arr = assertArray(key, value);
+function assertOverridesList(loc: OptionPath, value: mixed): OverridesList {
+  if (loc.parent.type === "env") {
+    throw new Error(`${msg(loc)} is not allowed inside an .env block`);
+  }
+  if (loc.parent.type === "overrides") {
+    throw new Error(`${msg(loc)} is not allowed inside an .overrides block`);
+  }
+  const parent: RootPath = loc.parent;
+
+  const arr = assertArray(loc, value);
   if (arr) {
     for (const [index, item] of arr.entries()) {
-      const env = assertObject(`${index}`, item);
-      if (!env) throw new Error(`.${key}[${index}] must be an object`);
+      const objLoc = access(loc, index);
+      const env = assertObject(objLoc, item);
+      if (!env) throw new Error(`${msg(objLoc)} must be an object`);
 
-      validate("override", env);
+      const overridesLoc = {
+        type: "overrides",
+        index,
+        parent,
+      };
+      validateNested(overridesLoc, env);
     }
   }
   return (arr: any);