Fixed semver coercing

* grammar correction of an option description

(missed in #10589)

* changed description to be consistent with others

Co-Authored-By: Huáng Jùnliàng <jlhwung@gmail.com>

* ran prettier

.circleci/config.yml

@@ -30,11 +30,20 @@ aliases:
   - &artifact_env_min
     path: ~/babel/packages/babel-preset-env-standalone/babel-preset-env.min.js
 
+  - &test262_workdir
+    working_directory: ~/babel/babel-test262-runner
+
+  - &artifact_test262_tap
+    path: ~/test262.tap
+
+  - &artifact_test262_xunit
+    path: ~/test-results
+
 jobs:
-  build:
+  test:
     working_directory: ~/babel
     docker:
-      - image: circleci/node:12
+      - image: circleci/node:13
     steps:
       - checkout
       - restore-cache: *restore-yarn-cache
@@ -54,3 +63,59 @@ jobs:
       - store_artifacts: *artifact_env_min
       - save_cache: *save-node-modules-cache
       - save_cache: *save-yarn-cache
+  test262:
+    working_directory: ~/babel
+    docker:
+      - image: circleci/node:12
+    steps:
+      - checkout
+      - restore-cache: *restore-yarn-cache
+      - restore-cache: *restore-node-modules-cache
+      - run:
+          name: Build Babel
+          command: BABEL_ENV=test make bootstrap
+      - run:
+          name: Link Babel
+          command: |
+            cd packages
+            for package in */; do
+              cd $package
+              yarn link
+              cd ..
+            done
+      - run:
+          name: Setup Test Runner
+          command: |
+            git clone --recurse-submodules https://github.com/babel/babel-test262-runner
+            cd babel-test262-runner
+            yarn
+            yarn add tap-mocha-reporter --dev
+            curl -L https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64 > jq
+            chmod +x ./jq
+            for package in ../packages/*/package.json; do
+              yarn link $(./jq -j ".name" $package)
+            done
+            node lib/download-node
+      - run:
+          name: Run Test262
+          command: node lib/run-tests I_AM_SURE | tee ~/test262.tap
+          <<: *test262_workdir
+      - store_artifacts: *artifact_test262_tap
+      - run:
+          name: Output test262 results
+          command: |
+            cat ~/test262.tap | $(npm bin)/tap-mocha-reporter spec || true
+          <<: *test262_workdir
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test
+  master:
+    jobs:
+      - test262:
+          filters:
+            branches:
+              only:
+                - master

.editorconfig

@@ -6,7 +6,7 @@ charset = utf-8
 trim_trailing_whitespace = true
 end_of_line = lf
 
-[*.{js,json}]
+[*.{js,json,ts,tsx}]
 indent_style = space
 indent_size = 2
 

.flowconfig

@@ -24,4 +24,6 @@ suppress_comment= \\(.\\|\n\\)*\\$FlowIgnore
 suppress_type=$FlowFixMe
 suppress_type=$FlowSubtype
 esproposal.export_star_as=enable
+esproposal.optional_chaining=enable
+esproposal.nullish_coalescing=enable
 module.name_mapper='^@babel\/\([a-zA-Z0-9_\-]+\)$' -> '<PROJECT_ROOT>/packages/babel-\1/src/index'

.github/CHANGELOG-6to5.md

@@ -122,7 +122,7 @@
   * Restructure transformers so they're only ran if the AST contains nodes that they need to worry about. Improves transpilation speed significantly.
  * **Bug Fix**
   * Fix source maps not tracking end of node locations.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Use static super references as the home object is actually done at definition time.
  * **Polish**
   * Force the `es6.destructuring` transformer to be whitelisted when the `es7.objectSpread` transformer is.
@@ -479,7 +479,7 @@
 
 ## 2.12.3
 
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Optional `typeof` transformer checks for `undefined` before passing it to the helper.
   * Class methods are now named.
 
@@ -551,7 +551,7 @@
   * Add `classesFastSuper` optional transformer that doesn't support parent getters and prototype changing.
   * Add `forOfFast` transformer that speeds up `for...of` on arrays but produces more code.
   * Add `--react-compat` to `bin/6to5`.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Disallow setters without a single parameter.
   * Add `configurable` and `writable` to defined properties.
   * Use define instead of assignment for class methods.
@@ -619,7 +619,7 @@
 
 ## 2.7.0
 
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Disallow reassignments of imports.
  * **New Feature**
   * `reactCompat` option to enable pre-v0.12 react components.
@@ -662,7 +662,7 @@
  * **Polish**
   * Move `"use strict";` to inside module bodies instead of at the top of the file.
   * Better handling of dynamic imports.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Class inheritance now has a `function` or `null` type check.
   * Add `interopRequireWildcard` around wildcard imports and exports to handle non-object exports.
 

.github/CHANGELOG-v4.md

@@ -110,7 +110,7 @@
   * Throw an error on different `babel` and `babel-runtime` versions.
   * Replicate module environment for `babel-node` eval.
   * Clean up classes output.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Make it illegal to use a rest parameter on a setter.
 
 ## 4.6.6
@@ -150,8 +150,8 @@
 
  * **New Feature**
   * Desugar sticky regexes to a new constructor expression so it can be handled by a polyfill.
- * **Spec Compliancy**
+ * **Spec Compliance**
-  * `for...of` now outputs in a lengthy `try...catch` this is to ensure spec compliancy in regards to iterator returns and abrupt completions. See [google/traceur-compiler#1773](https://github.com/google/traceur-compiler/issues/1773) and [babel/babel/#838](https://github.com/babel/babel/issues/838) for more information.
+  * `for...of` now outputs in a lengthy `try...catch` this is to ensure spec compliance in regards to iterator returns and abrupt completions. See [google/traceur-compiler#1773](https://github.com/google/traceur-compiler/issues/1773) and [babel/babel/#838](https://github.com/babel/babel/issues/838) for more information.
  * **Polish**
   * Rest parameters that are only referred to via number properties on member expressions are desugared into a direct `arguments` reference. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)!
   * `$ babel` no longer exits on syntax errors.

.github/CHANGELOG-v5.md

@@ -12,7 +12,7 @@
 
 ## 5.8.24
 
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Updated `optimisation.react.inlineElements` transformer to React 0.14 output. Thanks [@spicyj](https://github.com/spicyj)!
  * **Polish**
   * Add support for evaluating more static nodes. Thanks [@hzoo](https://github.com/hzoo)!
@@ -451,7 +451,7 @@ Issues with publish process.
 
 ![gifs lol](https://31.media.tumblr.com/568205a0e37ae15eca510fa639589a59/tumblr_n8kw8kpcSb1sg6cg8o1_500.gif)
 
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Allow trailing param commas for methods when using the `es7.trailingCommas` transformer.
  * **Bug Fix**
   * Fix `es6.blockScoping` transformer not properly ignoring `break` in `SwitchCase`.
@@ -481,7 +481,7 @@ Issues with publish process.
   * Fix correct function scope being passed to `nameMethod.property` when inferring the function name for class methods.
   * Fix incorrect extensions reference causing weird issues when using the Babel CLI.
   * Fix destructuring param reference replacements not inheriting from their original param.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Fix order that method decorators are ran in.
 
 ## 5.2.15
@@ -616,7 +616,7 @@ Issues with publish process.
   * Fix `externalHelpers` option being incorrectly listed as type `string`.
  * **Internal**
   * Upgrade `core-js` to `0.9.0`.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Fix object decorators not using the `initializer` pattern.
   * Remove property initializer descriptor reflection.
 

.github/CHANGELOG-v6.md

@@ -22,7 +22,7 @@
 > Backports for some folks (also other's when we accidentally merged PRs from both 6.x/master)
 > Lesson learned: just use `master` and backport on another branch.
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-core`, `babel-generator`, `babel-plugin-transform-flow-comments`, `babel-plugin-transform-flow-strip-types`, `babel-traverse`, `babel-types`
   * [#6081](https://github.com/babel/babel/pull/6081) Flow opaque type 6.x backport. ([@jbrown215](https://github.com/jbrown215))
 
@@ -1468,7 +1468,7 @@ It's a one-time use tool (helpful after the initial release when upgrading from
 
 ## v6.17.0 (2016-10-01)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-preset-stage-2`, `babel-preset-stage-3`
   * [#4617](https://github.com/babel/babel/pull/4617) Move async-generators to stage-3. ([@hzoo](https://github.com/hzoo))
 
@@ -1476,7 +1476,7 @@ It's a one-time use tool (helpful after the initial release when upgrading from
 
 Specification repo: https://github.com/tc39/proposal-async-iteration
 
-Asynchronous Iteration was already added in [6.16.0](http://babeljs.io/blog/2016/09/28/6.16.0#spec-compliancy) under stage-2 but it was moved to stage-3 at the [latest TC-39 meeting](https://github.com/tc39/agendas/blob/master/2016/09.md#agenda-for-the-54th-meeting-of-ecma-tc39).
+Asynchronous Iteration was already added in [6.16.0](http://babeljs.io/blog/2016/09/28/6.16.0#spec-compliance) under stage-2 but it was moved to stage-3 at the [latest TC-39 meeting](https://github.com/tc39/agendas/blob/master/2016/09.md#agenda-for-the-54th-meeting-of-ecma-tc39).
 
 ```js
 // async generator syntax
@@ -1569,7 +1569,7 @@ First PR!
 
 Babel 6.16: Happy 2nd Birthday 🎂!
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 
 * `babel-core`, `babel-generator`, `babel-helper-remap-async-to-generator`, `babel-helpers`, `babel-plugin-transform-async-generator-functions`, `babel-types`, `babel-preset-stage-2`, ...
   * [#3473](https://github.com/babel/babel/pull/3473) via [#4576](https://github.com/babel/babel/pull/4576) Implement support for async generator functions and for-await statements. ([@zenparsing](https://github.com/zenparsing))
@@ -2036,7 +2036,7 @@ It's also a lot folk's first PR (or first code PR)!
 * `babel-generator`, `babel-types`
   * [#3570](https://github.com/babel/babel/pull/3570) Add support for the new declare module.exports of flow. ([@danez](https://github.com/danez))
 
-#### Spec Compliancy
+#### Spec Compliance
 * `babel-plugin-transform-es2015-modules-amd`, `babel-plugin-transform-es2015-modules-commonjs`, `babel-plugin-transform-es2015-modules-umd`
   * [#3518](https://github.com/babel/babel/pull/3518) Throw error for multiple exports default. ([@kaicataldo](https://github.com/kaicataldo))
 
@@ -2332,7 +2332,7 @@ Length: The number of characters in the output code
 * `babel-plugin-transform-react-jsx-self`, `babel-preset-react`
   * [#3540](https://github.com/babel/babel/pull/3540) Added jsx-self babel transform plugin. ([@jimfb](https://github.com/jimfb))
 
-#### Spec Compliancy
+#### Spec Compliance
 * `babel-plugin-transform-es2015-unicode-regex`
   * [#3338](https://github.com/babel/babel/pull/3338) Update to `regexpu-core@2.0.0` for ES2016 compliance. ([@mathiasbynens](https://github.com/mathiasbynens))
 
@@ -3206,7 +3206,7 @@ Changes to note:
 - Reverting the class properties semicolon parser error.
 - Fix regression with plugin ordering with `babel-register`.
 
-#### Spec Compliancy
+#### Spec Compliance
 * `babel-plugin-transform-class-properties`, `babylon`
   * [#3332](https://github.com/babel/babel/pull/3332) Revert to standard ASI behavior for class properties. ([@loganfsmyth](https://github.com/loganfsmyth))
 
@@ -3628,7 +3628,7 @@ Thanks to @samwgoldman for all the new flow support!
  * `babel-plugin-transform-es2015-parameters`: [#3191](https://github.com/babel/babel/pull/3191) Fix the order of arguments initialization (fixes [T6809](http://phabricator.babeljs.io/T6809))
  * `babel-traverse`: [#3198](https://github.com/babel/babel/pull/3198) In `evaluate()`, it should not mistake lack of confidence for falsy
 
-* **Spec Compliancy**
+* **Spec Compliance**
  * `babylon`, `babel-generator`, `babel-plugin-transform-regenerator`: [#3190](https://github.com/babel/babel/pull/3190): Remove `await *` from `babylon` and raise an error for that syntax since it was removed from the proposal and was causing an issue at runtime but not at compile time (fixes [T6688](http://phabricator.babeljs.io/T6688)).
 
 * **Internal**
@@ -3863,7 +3863,7 @@ Thanks to @samwgoldman for all the new flow support!
   * Move `children` prop pushing to after props to ensure correct order in the react inline elements plugin.
   * Fix `buildExternalHelpers` script ignoring non-underscored helpers.
   * Fix exported classes with static class properties.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Add support for computed mutators in `babel-plugin-transform-es2015-computed-properties`.
  * **Polish**
   * Make interop for plugins with the `__esModule` work for all plugins no matter how they're imported/specified.
@@ -3904,7 +3904,7 @@ Thanks to @samwgoldman for all the new flow support!
  * **Polish**
   * Add npm 3 check to `babel-doctor`.
   * Autoclear the `babel/register` cache when it gets too big to be serialised.
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Add support for flow existential type parameters.
 
 ## 6.1.1
@@ -3969,7 +3969,7 @@ Thanks to @samwgoldman for all the new flow support!
 
 ## 6.0.14
 
- * **Spec Compliancy**
+ * **Spec Compliance**
   * Update exponentiation operator precedence.
   * Fix parser bug where arrow functions have a higher precedence than they should.
  * **Bug Fix**

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,6 +2,8 @@
 Before making a PR, please read our contributing guidelines
 https://github.com/babel/babel/blob/master/CONTRIBUTING.md
 
+Please note that the Babel Team requires two approvals before merging most PRs.
+
 For issue references: Add a comma-separated list of a [closing word](https://help.github.com/articles/closing-issues-via-commit-messages/) followed by the ticket number fixed by the PR. (it should be underlined in the preview if done correctly)
 
 If you are making a change that should have a docs update: submit another PR to https://github.com/babel/website
@@ -9,7 +11,7 @@ If you are making a change that should have a docs update: submit another PR to
 
 | Q                        | A <!--(Can use an emoji 👍) -->
 | ------------------------ | ---
-| Fixed Issues?            | `Fixes #1, Fixes #2` <!-- remove the (`) quotes to link the issues -->
+| Fixed Issues?            | `Fixes #1, Fixes #2` <!-- remove the (`) quotes and write "Fixes" before the number to link the issues -->
 | Patch: Bug Fix?          |
 | Major: Breaking Change?  |
 | Minor: New Feature?      |

.github/actions/create-release-tag/Dockerfile

@@ -1,16 +0,0 @@
-FROM debian:stable-slim
-
-LABEL "name"="create-release-tag"
-LABEL "version"="0.0.1"
-
-LABEL "com.github.actions.name"="Create release tag"
-LABEL "com.github.actions.description"="Creates a release tag equal to the last commit message"
-LABEL "com.github.actions.icon"="tag"
-LABEL "com.github.actions.color"="gray-dark"
-
-ADD entrypoint.sh /action/entrypoint.sh
-
-RUN chmod +x /action/entrypoint.sh
-RUN apt-get update && apt-get install -y --no-install-recommends git
-
-ENTRYPOINT ["/action/entrypoint.sh"]

.github/actions/create-release-tag/entrypoint.sh

@@ -1,14 +0,0 @@
-#!/bin/sh
-
-set -e
-
-# GitHub doesn't support running actions on new tags yet: we need to run it on the commit.
-# For this reason, we can't be sure that the tag already exists. We can use the commit
-# message to create the tag. If the tag already exists locally, they won't conflict because
-# they have the same name and are on the same commit.
-
-echo "INFO: Getting release version..."
-tag_name=$(git log --oneline --format=%B -1 $GITHUB_SHA)
-
-echo "INFO: Creating new tag..."
-(git tag $tag_name $GITHUB_SHA) || echo "INFO: Tag already exists"

.github/actions/filter-commit-message/Dockerfile

@@ -1,16 +0,0 @@
-FROM debian:stable-slim
-
-LABEL "name"="filter"
-LABEL "version"="1.1.0"
-
-LABEL "com.github.actions.name"="Filter commit message"
-LABEL "com.github.actions.description"="Stop a workflow if the message of the current commit doesn't match the pattern"
-LABEL "com.github.actions.icon"="filter"
-LABEL "com.github.actions.color"="gray-dark"
-
-ADD entrypoint.sh /action/entrypoint.sh
-
-RUN chmod +x /action/entrypoint.sh
-RUN apt-get update && apt-get install -y --no-install-recommends git
-
-ENTRYPOINT ["/action/entrypoint.sh"]

.github/actions/filter-commit-message/entrypoint.sh

@@ -1,15 +0,0 @@
-#!/bin/sh
-
-set -e
-
-pattern=$1
-message=$(git log --oneline --format=%B -1 $GITHUB_SHA)
-
-if echo "$message" | grep -Pq "$pattern"; then
-  echo "INFO: $message matches $pattern"
-  exit 0
-else
-  echo "INFO: $message does not match $pattern"
-  # 78 is the "neutral" exit status
-  exit 78
-fi

.github/actions/trigger-github-release/Dockerfile

@@ -1,19 +0,0 @@
-FROM node:10
-
-LABEL "name" = "trigger-github-release"
-LABEL "version" = "0.0.1"
-
-LABEL "com.github.actions.name" = "Trigger GitHub release"
-LABEL "com.github.actions.description" = "Trigger a new GitHub release and generate the changelog using lerna-changelog."
-LABEL "com.github.actions.icon" = "tag"
-LABEL "com.github.actions.color" = "yellow"
-
-ADD entrypoint.sh /action/entrypoint.sh
-ADD package.json /action/package.json
-ADD package-lock.json /action/package-lock.json
-ADD release.js /action/release.js
-ADD update-changelog.js /action/update-changelog.js
-
-RUN chmod +x /action/entrypoint.sh
-
-ENTRYPOINT ["/action/entrypoint.sh"]

.github/actions/trigger-github-release/entrypoint.sh

@@ -1,38 +0,0 @@
-#!/bin/sh
-
-set -e
-
-echo "INFO: Installing action dependencies..."
-(cd /action; npm ci)
-
-echo "INFO: Getting release version..."
-current_tag=$(git describe --abbrev=0 --tags $GITHUB_SHA)
-
-last_tag=$(git describe --abbrev=0 --tags $current_tag^)
-echo "INFO: New version is $current_tag; last version is $last_tag."
-
-echo "INFO: Generating the changelog..."
-
-# lerna-changelog expects the token to be provided as GITHUB_AUTH,
-# but GitHub actions don't allow to predefine custom env vars prefixed with
-# GITHUB_. We need to define it here.
-changelog=$(
-  GITHUB_AUTH="$GITHUB_TOKEN" \
-  node /action/node_modules/.bin/lerna-changelog --tag-from $last_tag --tag-to $current_tag
-)
-
-echo "INFO: Publishing the new GitHub release..."
-echo "$changelog" | node /action/release $current_tag
-
-echo "INFO: Updating CHANGELOG.md..."
-echo "$changelog" | node /action/update-changelog
-
-echo "INFO: Committing changelog..."
-git add CHANGELOG.md
-git -c user.name="$COMMIT_AUTHOR_NAME" -c user.email="$COMMIT_AUTHOR_EMAIL" \
-  commit -m "Add $current_tag to CHANGELOG.md [skip ci]" --no-verify --quiet
-
-echo "INFO: Pushing updates..."
-git push "https://${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" master
-
-echo "INFO: Done! Don't forget to thank new contributors :)"

.github/actions/trigger-github-release/package.json

@@ -1,12 +0,0 @@
-{
-    "private": true,
-    "name": "@internal/trigger-github-release",
-    "version": "0.0.1",
-    "author": "Nicolò Ribaudo <nicolo.ribaudo@gmail.com>",
-    "license": "MIT",
-    "dependencies": {
-        "@octokit/rest": "^16.3.0",
-        "get-stdin": "^6.0.0",
-        "lerna-changelog": "^0.8.2"
-    }
-}

.github/actions/trigger-github-release/release.js

@@ -1,26 +0,0 @@
-"use strict";
-
-const [ /* node */, /* file */, tag ] = process.argv;
-
-const getStdin = require("get-stdin");
-const octokit = require("@octokit/rest")();
-
-octokit.authenticate({
-  type: "token",
-  token: process.env.GITHUB_TOKEN
-});
-
-const [ repoOwner, repoName ] = process.env.GITHUB_REPOSITORY.split("/");
-
-getStdin()
-  .then(changelog => octokit.repos.createRelease({
-    owner: repoOwner,
-    repo: repoName,
-    tag_name: tag,
-    body: changelog,
-    draft: true,
-  }))
-  .catch(err => {
-    console.error(err);
-    process.exit(1);
-  });

.github/actions/trigger-github-release/update-changelog.js

@@ -1,31 +0,0 @@
-"use strict";
-
-const getStdin = require("get-stdin");
-const fs = require("fs").promises;
-const path = require("path");
-
-const { GITHUB_WORKSPACE } = process.env;
-
-const INSERTION_POINT = "<!-- insert-new-changelog-here -->";
-const CHANGELOG = path.resolve(GITHUB_WORKSPACE, "CHANGELOG.md");
-
-main();
-async function main() {
-  let [stdin, changelog] = await Promise.all([
-    getStdin(),
-    fs.readFile(CHANGELOG, "utf8"),
-  ]);
-
-  if (!changelog.includes(INSERTION_POINT)) {
-    throw new Error(`Missing "${INSERTION_POINT}" in CHANGELOG.md`);
-  }
-
-  // Remove committers
-  stdin = stdin.split("\n\n#### Committers")[0];
-  changelog = changelog.replace(
-    INSERTION_POINT,
-    INSERTION_POINT + "\n" + stdin
-  );
-
-  await fs.writeFile(CHANGELOG, changelog);
-}

.github/lock.yml

@@ -4,7 +4,7 @@
 daysUntilLock: 91
 # Comment to post before locking. Set to `false` to disable
 lockComment: false
-only: issues
+# The label to be applied when an issue is locked
 lockLabel: 'outdated'
 
 # Issues or pull requests with these labels will not be locked

.github/main.workflow

@@ -1,53 +0,0 @@
-workflow "Release" {
-  on = "push"
-  resolves = [
-    "Trigger GitHub release",
-    # GitHub actions are too slow for this, it takes more than 15 mins.
-    # Publishing to npm from GH actions is a cool idea, but it's a lot faster to
-    # publish locally.
-    # "Publish to npm",
-   ]
-}
-
-action "Trigger GitHub release" {
-  uses = "./.github/actions/trigger-github-release/"
-  secrets = ["GITHUB_TOKEN"]
-  env = {
-    COMMIT_AUTHOR_NAME = "Babel Bot"
-    COMMIT_AUTHOR_EMAIL = "babel-bot@users.noreply.github.com"
-  }
-  needs = ["Create release tag"]
-}
-
-action "Publish to npm" {
-  uses = "docker://node:10"
-  secrets = ["NPM_TOKEN"]
-  runs = "make"
-  args = "publish-ci"
-  env = {
-    CI = "true"
-  }
-  needs = ["Create release tag"]
-}
-
-# When GitHub Actions will support the "release" event for public
-# repositories, we won't need this checks anymore.
-action "Create release tag" {
-  uses = "./.github/actions/create-release-tag"
-  needs = [
-    "Is version commit",
-    "On master branch",
-  ]
-}
-
-action "Is version commit" {
-  uses = "./.github/actions/filter-commit-message"
-  # This regex is run using "grep -P".
-  # The (-\\S+) part is for 7.0.0-beta.1 releases.
-  args = "^v(\\d+\\.){2}\\d+(-\\S+)?$"
-}
-
-action "On master branch" {
-  uses = "actions/bin/filter@master"
-  args = "branch master"
-}

.github/workflows/issue-triage.yml

@@ -0,0 +1,81 @@
+name: Issue Triage
+
+on:
+  issues:
+    types: [opened, labeled]
+
+jobs:
+  welcome:
+    name: Welcome comment
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if Babel member
+        id: is_babel_member
+        if: github.event.action == 'opened'
+        uses: babel/actions/is-org-member@v2
+        with:
+          org: babel
+          username: ${{ github.event.issue.user.login }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Create Welcome Comment
+        uses: babel/actions/create-comment@v2
+        if: |
+          github.event.action == 'opened' &&
+          steps.is_babel_member.outputs.result == 0
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          issue: ${{ github.event.issue.number }}
+          comment: >
+            Hey @${{ github.event.issue.user.login }}!
+            We really appreciate you taking the time to report an issue. The 
+            collaborators on this project attempt to help as many people as 
+            possible, but we're a limited number of volunteers, so it's 
+            possible this won't be addressed swiftly.
+
+
+            If you need any help, or just have general Babel or JavaScript questions, we have a 
+            vibrant [Slack community](https://babeljs.slack.com) that typically always has someone 
+            willing to help. You can sign-up [here](https://slack.babeljs.io/) for an invite."
+
+  needs_info:
+    name: Needs Info
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create Needs Info Comment
+        uses: babel/actions/create-comment@v2
+        if: |
+          github.event.action == 'labeled' &&
+          github.event.label.name == 'Needs Info'
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          issue: ${{ github.event.issue.number }}
+          comment: >
+            Hi @${{ github.event.issue.user.login }}!
+            This issue is missing some important information we'll need
+            to be able to reproduce this issue.
+
+
+            Please understand that we receive a high volume of issues,
+            and there are only a limited number of volunteers that help
+            maintain this project. The easier it is for us to decipher an
+            issue with the info provided, the more likely it is that we'll
+            be able to help.
+
+
+            Please make sure you have the following information documented in
+            this ticket:
+            
+            1. Your Babel configuration (typically from `.babelrc` or `babel.config.js`)
+
+            2. The current (incorrect) behavior you're seeing
+
+            3. The behavior you expect
+
+            4. A [short, self-contained example](http://sscce.org/)
+
+
+            Please provide either a link to the problem via the
+            [`repl`](https://babeljs.io/repl/), or if the `repl` is
+            insufficient, a new and minimal repository with instructions on
+            how to build/replicate the issue.
+        

.github/workflows/release.yml

@@ -0,0 +1,53 @@
+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+jobs:
+  github_release:
+    name: Trigger GitHub release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the new tag
+        uses: actions/checkout@v1.0.0
+
+      - name: Get tag info
+        id: tags
+        uses: babel/actions/get-release-tags@v2
+
+      - name: Generate the changelog
+        id: changelog
+        uses: babel/actions/generate-lerna-changelog@v2
+        with:
+          from: ${{ steps.tags.outputs.old }}
+          to: ${{ steps.tags.outputs.new }}
+        env:
+          GITHUB_AUTH: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create a draft GitHub release
+        uses: babel/actions/publish-github-release@v2
+        with:
+          tag: ${{ steps.tags.outputs.new }}
+          changelog: ${{ steps.changelog.outputs.changelog }}
+          token: ${{ secrets.BOT_TOKEN }}
+
+      - name: Check if releasing from master
+        id: is_master
+        uses: babel/actions/ref-matches-branch@v2
+        with:
+          name: master
+
+      - name: Update CHANGELOG.md
+        if: steps.is_master.outputs.result == 1
+        uses: babel/actions/update-changelog@v2
+        with:
+          changelog: ${{ steps.changelog.outputs.changelog }}
+
+      - name: Commit CHANGELOG.md
+        if: steps.is_master.outputs.result == 1
+        run: |
+          git add CHANGELOG.md
+          git -c user.name="Babel Bot" -c user.email="babel-bot@users.noreply.github.com" \
+            commit -m "Add ${{ steps.tags.outputs.new }} to CHANGELOG.md [skip ci]" --no-verify --quiet
+          git push "https://babel-bot:${{ secrets.BOT_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git" master

.gitignore

@@ -35,7 +35,7 @@ package-lock.json
 !/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/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

.travis.yml

@@ -3,41 +3,43 @@ git:
 language: node_js
 cache:
   yarn: true
-node_js:
+
-  # We test the latest version on circleci
+os: linux
-  - '11'
-  - '10'
-  - '8'
-  - '6'
 
 env:
   global:
     - PATH=$HOME/.yarn/bin:$PATH
     - JOB=test
 
-before_install:
+install: skip
-  - curl -o- -L https://yarnpkg.com/install.sh | bash
-
-install:
-  # the `make test-ci` script runs this command already
-  - if [ "$JOB" != "test" ] && [ "$JOB" != "lint" ]; then yarn install; fi
-  - if [ "$JOB" = "lint" ]; then make bootstrap; fi
-
 before_script:
-  - if [ "$JOB" = "babel-parser-flow-tests" ]; then make bootstrap-flow; fi
+  - curl -o- -L https://yarnpkg.com/install.sh | bash
-  - if [ "$JOB" = "babel-parser-test262-tests" ]; then make bootstrap-test262; fi
+  - if [ "$TRAVIS_OS_NAME" = "windows" ]; then choco install make; fi
 
 script:
-  - if [ "$JOB" = "test" ]; then make test-ci; fi
+  - if [ "$JOB" = "test" ]; then make -j test-ci; fi
-  - if [ "$JOB" = "lint" ]; then make lint && make flow; fi
+  - if [ "$JOB" = "lint" ]; then make -j code-quality-ci; fi
-  - if [ "$JOB" = "babel-parser-flow-tests" ]; then make test-flow-ci; fi
+  - if [ "$JOB" = "babel-parser-flow-tests" ]; then make -j test-flow-ci; fi
-  - if [ "$JOB" = "babel-parser-test262-tests" ]; then make test-test262-ci; fi
+  - if [ "$JOB" = "babel-parser-test262-tests" ]; then make -j test-test262-ci; fi
 
 matrix:
   fast_finish: true
   include:
     - node_js: "node"
       env: JOB=lint
+    # We test the latest version on circleci
+    - node_js: "12"
+    # Move `windows` build to be the third since it is slow
+    - os: windows
+      node_js: "node"
+      env:
+        - JOB=test
+        # https://travis-ci.community/t/build-doesnt-finish-after-completing-tests/288/9
+        - YARN_GPG=no
+    # Continue node_js matrix
+    - node_js: "6"
+    - node_js: "10"
+    - node_js: "8"
     - node_js: "node"
       env: JOB=babel-parser-flow-tests
     - node_js: "node"

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 > **Tags:**
 > - :boom:       [Breaking Change]
-> - :eyeglasses: [Spec Compliancy]
+> - :eyeglasses: [Spec Compliance]
 > - :rocket:     [New Feature]
 > - :bug:        [Bug Fix]
 > - :memo:       [Documentation]
@@ -17,6 +17,372 @@ See [Babylon's CHANGELOG](packages/babylon/CHANGELOG.md) for the Babylon pre-7.0
 
 <!-- DO NOT CHANGE THESE COMMENTS - See .github/actions/trigger-github-release/update-changelog.js -->
 <!-- insert-new-changelog-here -->
+## v7.7.3 (2019-11-08)
+
+#### :bug: Bug Fix
+* `babel-parser`
+  * [#10682](https://github.com/babel/babel/pull/10682) Don't recover from "adjacent jsx elements" parser error ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+## v7.7.2 (2019-11-07)
+
+#### :bug: Bug Fix
+* `babel-parser`
+  * [#10669](https://github.com/babel/babel/pull/10669) Parse arrows with params annotations in conditional expressions ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-transform-typescript`
+  * [#10658](https://github.com/babel/babel/pull/10658) fix: remove accessibility of constructor ([@JLHwung](https://github.com/JLHwung))
+* `babel-traverse`
+  * [#10656](https://github.com/babel/babel/pull/10656) fix: add inList setter for compatibility with babel-minify ([@JLHwung](https://github.com/JLHwung))
+## v7.7.1 (2019-11-05)
+
+#### :bug: Bug Fix
+* `babel-types`
+  * [#10650](https://github.com/babel/babel/pull/10650) Revert "throw a TypeError if identifier validation fails (#10621)" ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-preset-env`
+  * [#10649](https://github.com/babel/babel/pull/10649) Fix(babel-preset-env): check api.caller is a function to avoid to thr… ([@love2me](https://github.com/love2me))
+
+## v7.7.0 (2019-11-05)
+
+#### :eyeglasses: Spec Compliance
+* `babel-types`
+  * [#10621](https://github.com/babel/babel/pull/10621) throw a TypeError if identifier validation fails. ([@dentrado](https://github.com/dentrado))
+* `babel-parser`
+  * [#10559](https://github.com/babel/babel/pull/10559) fix: Exclude catch clause from let identifier error. ([@gonzarodriguezt](https://github.com/gonzarodriguezt))
+  * [#10567](https://github.com/babel/babel/pull/10567) [parser] Exception to 8 and 9 in tagged template. ([@pnowak](https://github.com/pnowak))
+  * [#10532](https://github.com/babel/babel/pull/10532) Allow duplicate __proto__ keys in patterns, simple case (#6705). ([@alejo90](https://github.com/alejo90))
+
+#### :rocket: New Feature
+* `babel-generator`, `babel-helper-create-class-features-plugin`, `babel-parser`, `babel-plugin-transform-typescript`, `babel-preset-typescript`, `babel-types`
+  * [#10545](https://github.com/babel/babel/pull/10545) Add support for TS declare modifier on fields. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-core`, `babel-parser`, `babel-preset-typescript`
+  * [#10363](https://github.com/babel/babel/pull/10363) @babel/parser error recovery. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-core`
+  * [#10599](https://github.com/babel/babel/pull/10599) Add support for .cjs config files. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10501](https://github.com/babel/babel/pull/10501) Add support for babel.config.json. ([@devongovett](https://github.com/devongovett))
+  * [#10361](https://github.com/babel/babel/pull/10361) feat: if code frame error is on a single line, highlight the whole path. ([@SimenB](https://github.com/SimenB))
+* `babel-plugin-syntax-top-level-await`, `babel-preset-env`
+  * [#10573](https://github.com/babel/babel/pull/10573) Create @babel/plugin-syntax-top-level-await. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helper-builder-react-jsx`, `babel-plugin-transform-react-jsx`, `babel-preset-react`
+  * [#10572](https://github.com/babel/babel/pull/10572) [transform-react-jsx] Add useSpread option to transform JSX. ([@ivandevp](https://github.com/ivandevp))
+* `babel-generator`, `babel-parser`, `babel-plugin-proposal-decorators`, `babel-plugin-syntax-flow`, `babel-types`
+  * [#10344](https://github.com/babel/babel/pull/10344) Flow enums parsing. ([@gkz](https://github.com/gkz))
+* `babel-plugin-transform-function-name`, `babel-plugin-transform-modules-umd`, `babel-preset-env`
+  * [#10477](https://github.com/babel/babel/pull/10477) Changes UMD callsite to be more likely to pass in the intended object.. ([@MicahZoltu](https://github.com/MicahZoltu))
+* `babel-parser`
+  * [#10449](https://github.com/babel/babel/pull/10449) Create parser plugin "topLevelAwait". ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10521](https://github.com/babel/babel/pull/10521) [parser] Enable "exportNamespaceFrom" by default. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10483](https://github.com/babel/babel/pull/10483) [parser] Add support for private fields in TypeScript. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-generator`, `babel-parser`, `babel-types`
+  * [#10543](https://github.com/babel/babel/pull/10543) add assertions signature for TypeScript. ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-cli`, `babel-register`
+  * [#8622](https://github.com/babel/babel/pull/8622) Make dir for babel --out-file. ([@TrySound](https://github.com/TrySound))
+* `babel-cli`
+  * [#10399](https://github.com/babel/babel/pull/10399) Closes [#8326](https://github.com/babel/babel/issues/8326), add back --quiet option.. ([@chris-peng-1244](https://github.com/chris-peng-1244))
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-proposal-async-generator-functions`, `babel-plugin-proposal-function-sent`, `babel-preset-env`
+  * [#10422](https://github.com/babel/babel/pull/10422) Correctly delegate .return() in async generator. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helper-module-transforms`, `babel-plugin-transform-modules-commonjs`
+  * [#10628](https://github.com/babel/babel/pull/10628) Don't throw when destructuring into a var named as an import. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-transform-modules-systemjs`
+  * [#10638](https://github.com/babel/babel/pull/10638) fix: remove ExportNamedDeclaration when the specifier is empty. ([@JLHwung](https://github.com/JLHwung))
+* `babel-parser`
+  * [#10631](https://github.com/babel/babel/pull/10631) [TS] Parse calls with type args in optional chains. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10607](https://github.com/babel/babel/pull/10607) fixed missing errors on assignment pattern in object expression. ([@vivek12345](https://github.com/vivek12345))
+  * [#10594](https://github.com/babel/babel/pull/10594) [parser] Parse only modifiers of actual methods. ([@gonzarodriguezt](https://github.com/gonzarodriguezt))
+* `babel-plugin-transform-typescript`
+  * [#10555](https://github.com/babel/babel/pull/10555) [TS] Correctly transform computed strings and templates in enums. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-core`
+  * [#10623](https://github.com/babel/babel/pull/10623) Fix: inputSourceMap should work when it is an external file. ([@JLHwung](https://github.com/JLHwung))
+  * [#10539](https://github.com/babel/babel/pull/10539) fix: remove filename annotation in buildCodeFrameError. ([@JLHwung](https://github.com/JLHwung))
+* `babel-plugin-proposal-decorators`
+  * [#10578](https://github.com/babel/babel/pull/10578) [decorators] fix: support string literal properties. ([@mwhitworth](https://github.com/mwhitworth))
+* `babel-helpers`, `babel-plugin-proposal-dynamic-import`, `babel-plugin-transform-modules-commonjs`, `babel-preset-env`
+  * [#10574](https://github.com/babel/babel/pull/10574) fix: _interopRequireWildcard should only cache objects. ([@samMeow](https://github.com/samMeow))
+* `babel-traverse`
+  * [#9777](https://github.com/babel/babel/pull/9777) [traverse] Allow skipping nodes inserted with .replaceWith(). ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-preset-env`
+  * [#10146](https://github.com/babel/babel/pull/10146) Inject core-js@3 imports in Program:exit instead of on post(). ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-generator`
+  * [#10519](https://github.com/babel/babel/pull/10519) Fix generator missing parens around an arrow returning function type. ([@existentialism](https://github.com/existentialism))
+* `babel-plugin-transform-async-to-generator`, `babel-preset-env`, `babel-traverse`
+  * [#9939](https://github.com/babel/babel/pull/9939) Don't use args rest/spread to hoist super method calls. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :nail_care: Polish
+* `babel-plugin-transform-classes`, `babel-plugin-transform-regenerator`, `babel-preset-env`
+  * [#9481](https://github.com/babel/babel/pull/9481) [preset-env] Don't use async-to-generator when already using regenerator. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helpers`, `babel-plugin-transform-modules-commonjs`, `babel-preset-env`
+  * [#10585](https://github.com/babel/babel/pull/10585) fix(babel‑helpers/interopRequireWildcard): Avoid double nullish check. ([@ExE-Boss](https://github.com/ExE-Boss))
+* `babel-register`
+  * [#10557](https://github.com/babel/babel/pull/10557) fix: disable caching when babel could not read/write cache. ([@JLHwung](https://github.com/JLHwung))
+
+#### :house: Internal
+* `babel-cli`, `babel-node`
+  * [#10619](https://github.com/babel/babel/pull/10619) chore: remove output-file-sync dependency. ([@JLHwung](https://github.com/JLHwung))
+* `babel-register`
+  * [#10614](https://github.com/babel/babel/pull/10614) chore: bump source-map-support to 0.5.14. ([@JLHwung](https://github.com/JLHwung))
+* `babel-helper-create-regexp-features-plugin`, `babel-plugin-proposal-unicode-property-regex`, `babel-plugin-transform-dotall-regex`, `babel-plugin-transform-named-capturing-groups-regex`, `babel-plugin-transform-unicode-regex`, `babel-preset-env`
+  * [#10447](https://github.com/babel/babel/pull/10447) Merge multiple regex transform plugin. ([@JLHwung](https://github.com/JLHwung))
+* `babel-preset-env`
+  * [#10612](https://github.com/babel/babel/pull/10612) chore: update web.immediate support fixtures. ([@JLHwung](https://github.com/JLHwung))
+* `babel-helper-module-imports`
+  * [#10608](https://github.com/babel/babel/pull/10608) Use .find instead of .filter to get targetPath in ImportInjector. ([@Andarist](https://github.com/Andarist))
+* Other
+  * [#10600](https://github.com/babel/babel/pull/10600) Test node@13 on circle. ([@existentialism](https://github.com/existentialism))
+  * [#10593](https://github.com/babel/babel/pull/10593) chore: replace outdated travis-ci.org badges [ci skip]. ([@JLHwung](https://github.com/JLHwung))
+  * [#10591](https://github.com/babel/babel/pull/10591) chore: test against Node.js 13. ([@JLHwung](https://github.com/JLHwung))
+  * [#10556](https://github.com/babel/babel/pull/10556) Add master branch workflow for test262 tests. ([@jbhoosreddy](https://github.com/jbhoosreddy))
+  * [#10553](https://github.com/babel/babel/pull/10553) chore: introduce envinfo into environment section. ([@JLHwung](https://github.com/JLHwung))
+* `babel-runtime`
+  * [#10418](https://github.com/babel/babel/pull/10418) docs: add homepage link. ([@DanArthurGallagher](https://github.com/DanArthurGallagher))
+* `babel-helper-annotate-as-pure`, `babel-helper-bindify-decorators`, `babel-helper-builder-binary-assignment-operator-visitor`, `babel-helper-builder-react-jsx`, `babel-helper-call-delegate`, `babel-helper-define-map`, `babel-helper-explode-assignable-expression`, `babel-helper-explode-class`, `babel-helper-function-name`, `babel-helper-get-function-arity`, `babel-helper-hoist-variables`, `babel-helper-member-expression-to-functions`, `babel-helper-module-imports`, `babel-helper-module-transforms`, `babel-helper-optimise-call-expression`, `babel-helper-remap-async-to-generator`, `babel-helper-replace-supers`, `babel-helper-simple-access`, `babel-helper-split-export-declaration`, `babel-helper-wrap-function`, `babel-helpers`, `babel-template`
+  * [#10568](https://github.com/babel/babel/pull/10568) Bump babel-types to ^7.6.3. ([@JLHwung](https://github.com/JLHwung))
+
+#### :running_woman: Performance
+* `babel-traverse`
+  * [#10480](https://github.com/babel/babel/pull/10480) Traverse performance. ([@JLHwung](https://github.com/JLHwung))
+
+## v7.6.4 (2019-10-10)
+
+#### :eyeglasses: Spec Compliance
+* `babel-parser`
+  * [#10491](https://github.com/babel/babel/pull/10491) Trailing comma after rest - The final fix ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :bug: Bug Fix
+* `babel-cli`, `babel-core`, `babel-generator`, `babel-helper-transform-fixture-test-runner`
+  * [#10536](https://github.com/babel/babel/pull/10536) Revert "chore: Upgrade source-map to 0.6.1 (#10446)" ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+## v7.6.3 (2019-10-08)
+
+#### :eyeglasses: Spec Compliance
+* `babel-parser`
+  * [#10469](https://github.com/babel/babel/pull/10469) Disallow await inside async arrow params ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10493](https://github.com/babel/babel/pull/10493) [parser] Disallow numeric separators in legacy octal like integers ([@gonzarodriguezt](https://github.com/gonzarodriguezt))
+
+#### :rocket: New Feature
+* `babel-types`
+  * [#10504](https://github.com/babel/babel/pull/10504) Add declarations for more of @babel/types exports ([@Jessidhia](https://github.com/Jessidhia))
+
+#### :bug: Bug Fix
+* `babel-plugin-transform-block-scoping`
+  * [#10343](https://github.com/babel/babel/pull/10343) Do not remove let bindings even they are wrapped in closure ([@JLHwung](https://github.com/JLHwung))
+* `babel-parser`
+  * [#10119](https://github.com/babel/babel/pull/10119) add scope to TSModuleDeclaration ([@tanhauhau](https://github.com/tanhauhau))
+  * [#10332](https://github.com/babel/babel/pull/10332) Do not allow member expressions to start async arrows ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10490](https://github.com/babel/babel/pull/10490) [parser] Don't crash on comment after trailing comma after elision ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-transform-react-constant-elements`, `babel-traverse`
+  * [#10529](https://github.com/babel/babel/pull/10529) Do not hoist jsx referencing a mutable binding ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-generator`, `babel-parser`, `babel-plugin-transform-block-scoping`, `babel-plugin-transform-flow-comments`, `babel-plugin-transform-flow-strip-types`, `babel-plugin-transform-typescript`
+  * [#10220](https://github.com/babel/babel/pull/10220) Flow: interface identifier should be declared in the scope ([@JLHwung](https://github.com/JLHwung))
+
+#### :nail_care: Polish
+* `babel-core`
+  * [#10419](https://github.com/babel/babel/pull/10419) assertNoDuplicates throw with more context ([@hjdivad](https://github.com/hjdivad))
+  * [#10511](https://github.com/babel/babel/pull/10511) Add filename to transform error ([@JLHwung](https://github.com/JLHwung))
+
+#### :house: Internal
+* Other
+  * [#10506](https://github.com/babel/babel/pull/10506) Use `make -j` for parallel build ([@JLHwung](https://github.com/JLHwung))
+  * [#10443](https://github.com/babel/babel/pull/10443) perf: only apply lazy cjs module transform on cli and core ([@JLHwung](https://github.com/JLHwung))
+  * [#10494](https://github.com/babel/babel/pull/10494) Enable optional chaining and nullish coalescing plugins ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-cli`, `babel-core`, `babel-generator`, `babel-helper-fixtures`, `babel-helper-transform-fixture-test-runner`, `babel-node`, `babel-plugin-transform-react-jsx-source`, `babel-plugin-transform-runtime`, `babel-preset-env`, `babel-preset-react`
+  * [#10249](https://github.com/babel/babel/pull/10249) Add windows to travis ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :running_woman: Performance
+* `babel-parser`
+  * [#10371](https://github.com/babel/babel/pull/10371) perf: replace lookahead by lookaheadCharCode ([@JLHwung](https://github.com/JLHwung))
+* Other
+  * [#10443](https://github.com/babel/babel/pull/10443) perf: only apply lazy cjs module transform on cli and core ([@JLHwung](https://github.com/JLHwung))
+## v7.6.2 (2019-09-23)
+
+#### :eyeglasses: Spec Compliance
+* `babel-parser`
+  * [#10472](https://github.com/babel/babel/pull/10472) added check to disallow super.private variable access and test case added. ([@vivek12345](https://github.com/vivek12345))
+  * [#10468](https://github.com/babel/babel/pull/10468) [parser] Disallow numeric separator in unicode scape sequences. ([@ivandevp](https://github.com/ivandevp))
+  * [#10467](https://github.com/babel/babel/pull/10467) [parser] Invalid NonOctal Decimal. ([@gonzarodriguezt](https://github.com/gonzarodriguezt))
+  * [#10461](https://github.com/babel/babel/pull/10461) [parser] Disallow static fields named `constructor`. ([@guywaldman](https://github.com/guywaldman))
+  * [#10455](https://github.com/babel/babel/pull/10455) [parser] Report escapes in kws only if they won't be used as identifiers. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :bug: Bug Fix
+* `babel-parser`
+  * [#10445](https://github.com/babel/babel/pull/10445) Leave trailing comments after handling a possible trailing comma. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-cli`
+  * [#10400](https://github.com/babel/babel/pull/10400) fix: allow the process to exit naturally. ([@JLHwung](https://github.com/JLHwung))
+* `babel-core`
+  * [#10402](https://github.com/babel/babel/pull/10402) fix: pass optionLoc when validating plugin object. ([@JLHwung](https://github.com/JLHwung))
+* `babel-plugin-transform-block-scoping`, `babel-plugin-transform-spread`, `babel-traverse`
+  * [#10417](https://github.com/babel/babel/pull/10417) Do not guess relative execution status for exported fns. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-proposal-object-rest-spread`, `babel-preset-env`
+  * [#10275](https://github.com/babel/babel/pull/10275) fix object rest in array pattern. ([@tanhauhau](https://github.com/tanhauhau))
+
+#### :house: Internal
+* `babel-plugin-transform-named-capturing-groups-regex`
+  * [#10430](https://github.com/babel/babel/pull/10430) refactor: replace regexp-tree by regexpu. ([@JLHwung](https://github.com/JLHwung))
+* Other
+  * [#10441](https://github.com/babel/babel/pull/10441) Update GitHub actions to v2. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+  * [#10427](https://github.com/babel/babel/pull/10427) chore: add lint-ts rule. ([@JLHwung](https://github.com/JLHwung))
+* `babel-helper-fixtures`
+  * [#10428](https://github.com/babel/babel/pull/10428) chore: remove tryResolve dependency. ([@JLHwung](https://github.com/JLHwung))
+* `babel-node`
+  * [#10429](https://github.com/babel/babel/pull/10429) Remove babel polyfill dependency of babel-node. ([@bdwain](https://github.com/bdwain))
+* `babel-generator`, `babel-helper-fixtures`
+  * [#10420](https://github.com/babel/babel/pull/10420) chore: remove trim-right dependency. ([@JLHwung](https://github.com/JLHwung))
+* `babel-core`, `babel-plugin-transform-runtime`, `babel-register`
+  * [#10405](https://github.com/babel/babel/pull/10405) Remove circular dependency. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :running_woman: Performance
+* `babel-parser`
+  * [#10421](https://github.com/babel/babel/pull/10421) Miscellaneous perf tweak. ([@JLHwung](https://github.com/JLHwung))
+
+## v7.6.1 (2019-09-06)
+
+#### :bug: Bug Fix
+* `babel-types`
+  * [#10404](https://github.com/babel/babel/pull/10404) fix(types): correct typescript function headers ([@forstermatth](https://github.com/forstermatth))
+* `babel-node`
+  * [#9758](https://github.com/babel/babel/pull/9758) Remove process.exit(1) from babel-node ([@dword-design](https://github.com/dword-design))
+
+## v7.6.0 (2019-09-06)
+
+#### :eyeglasses: Spec Compliance
+* `babel-generator`, `babel-parser`
+  * [#10269](https://github.com/babel/babel/pull/10269) Fix parenthesis for nullish coalescing ([@vivek12345](https://github.com/vivek12345))
+* `babel-helpers`, `babel-plugin-transform-block-scoping`, `babel-traverse`
+  * [#9498](https://github.com/babel/babel/pull/9498) Fix tdz checks in transform-block-scoping plugin ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+#### :rocket: New Feature
+* `babel-core`
+  * [#10181](https://github.com/babel/babel/pull/10181) feat(errors): validate preset when filename is absent ([@JLHwung](https://github.com/JLHwung))
+* `babel-helper-create-class-features-plugin`, `babel-helpers`, `babel-plugin-proposal-private-methods`
+  * [#10217](https://github.com/babel/babel/pull/10217) Class Private Static Accessors ([@tim-mc](https://github.com/tim-mc))
+* `babel-generator`, `babel-parser`, `babel-types`
+  * [#10148](https://github.com/babel/babel/pull/10148) V8intrinsic syntax plugin ([@JLHwung](https://github.com/JLHwung))
+* `babel-preset-typescript`
+  * [#10382](https://github.com/babel/babel/pull/10382) Allow setting 'allowNamespaces' in typescript preset ([@dsgkirkby](https://github.com/dsgkirkby))
+* `babel-parser`
+  * [#10352](https://github.com/babel/babel/pull/10352) Do not register ambient classes to the TS scope ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-types`
+  * [#10248](https://github.com/babel/babel/pull/10248) Add static to class property builder ([@yuri-karadzhov](https://github.com/yuri-karadzhov))
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-transform-destructuring`, `babel-plugin-transform-modules-commonjs`, `babel-preset-env`
+  * [#10396](https://github.com/babel/babel/pull/10396) fix: early return when instance is not iterable ([@JLHwung](https://github.com/JLHwung))
+* `babel-plugin-transform-runtime`
+  * [#10398](https://github.com/babel/babel/pull/10398) Add supports for polyfill computed methods ([@rhyzx](https://github.com/rhyzx))
+* `babel-preset-env`
+  * [#10397](https://github.com/babel/babel/pull/10397) Don't polyfill when evaluation is not confident ([@rhyzx](https://github.com/rhyzx))
+  * [#10218](https://github.com/babel/babel/pull/10218) [preset-env] Include / exclude module plugins properly ([@AdamRamberg](https://github.com/AdamRamberg))
+  * [#10284](https://github.com/babel/babel/pull/10284) Replace es.string.reverse with es.array.reverse ([@epicfaace](https://github.com/epicfaace))
+* `babel-plugin-transform-named-capturing-groups-regex`
+  * [#10395](https://github.com/babel/babel/pull/10395) fix: transform name capturing regex once ([@JLHwung](https://github.com/JLHwung))
+* `babel-types`
+  * [#10098](https://github.com/babel/babel/pull/10098) fix typescript for babel-types ([@tanhauhau](https://github.com/tanhauhau))
+  * [#10319](https://github.com/babel/babel/pull/10319) Add a builder definition including name for tsTypeParameter ([@deificx](https://github.com/deificx))
+* `babel-parser`
+  * [#10380](https://github.com/babel/babel/pull/10380) Refactor trailing comment adjustment ([@banga](https://github.com/banga))
+  * [#10369](https://github.com/babel/babel/pull/10369) Retain trailing comments in array expressions ([@banga](https://github.com/banga))
+  * [#10292](https://github.com/babel/babel/pull/10292) fix: assign trailing comment to ObjectProperty only when inside an ObjectExpression ([@JLHwung](https://github.com/JLHwung))
+* `babel-parser`, `babel-types`
+  * [#10366](https://github.com/babel/babel/pull/10366) Don't allow JSXNamespacedName to chain ([@jridgewell](https://github.com/jridgewell))
+* `babel-generator`, `babel-plugin-transform-typescript`, `babel-types`
+  * [#10341](https://github.com/babel/babel/pull/10341) Add TSBigIntKeyword to @babel/types ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-core`, `babel-types`
+  * [#9960](https://github.com/babel/babel/pull/9960) Do not delete "fake" source map comments from strings ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-transform-flow-comments`
+  * [#10329](https://github.com/babel/babel/pull/10329) Fix flow comments plugin issues ([@zaygraveyard](https://github.com/zaygraveyard))
+* `babel-helpers`, `babel-plugin-transform-react-constant-elements`
+  * [#10307](https://github.com/babel/babel/pull/10307) [fix] jsx helper calls order ([@Sinewyk](https://github.com/Sinewyk))
+* `babel-plugin-proposal-decorators`
+  * [#10302](https://github.com/babel/babel/pull/10302) fix: register inserted class declaration ([@thiagoarrais](https://github.com/thiagoarrais))
+* `babel-plugin-proposal-do-expressions`, `babel-traverse`
+  * [#10070](https://github.com/babel/babel/pull/10070) Do expressions transform for switch statements ([@tanhauhau](https://github.com/tanhauhau))
+  * [#10277](https://github.com/babel/babel/pull/10277) remove finally from completion record in try statement ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-helpers`, `babel-plugin-transform-named-capturing-groups-regex`
+  * [#10136](https://github.com/babel/babel/pull/10136) fix capturing group for matchAll ([@tanhauhau](https://github.com/tanhauhau))
+
+#### :nail_care: Polish
+* `babel-plugin-transform-runtime`, `babel-preset-env`
+  * [#10372](https://github.com/babel/babel/pull/10372) Don't allow instance properties transformation on namespace ([@rhyzx](https://github.com/rhyzx))
+
+#### :memo: Documentation
+* [#10313](https://github.com/babel/babel/pull/10313) Adds note about two approval policy to PR template ([@thiagoarrais](https://github.com/thiagoarrais))
+
+#### :house: Internal
+* `babel-register`
+  * [#9847](https://github.com/babel/babel/pull/9847) Remove core-js dependency from @babel/register ([@coreyfarrell](https://github.com/coreyfarrell))
+* `babel-helper-fixtures`, `babel-helper-transform-fixture-test-runner`, `babel-preset-env`
+  * [#10401](https://github.com/babel/babel/pull/10401) Use "validateLogs" for preset-env's debug fixtures ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-parser`
+  * [#10380](https://github.com/babel/babel/pull/10380) Refactor trailing comment adjustment ([@banga](https://github.com/banga))
+* `babel-helper-fixtures`, `babel-helper-transform-fixture-test-runner`, `babel-plugin-proposal-dynamic-import`, `babel-preset-env`
+  * [#10326](https://github.com/babel/babel/pull/10326) Allow testing logs with `@babel/helper-transform-fixture-test-runner` ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-runtime-corejs2`, `babel-runtime`, `babel-types`
+  * [#10331](https://github.com/babel/babel/pull/10331) Commit generated code ([@JLHwung](https://github.com/JLHwung))
+* `babel-cli`, `babel-core`, `babel-generator`, `babel-helper-create-class-features-plugin`, `babel-helper-fixtures`, `babel-node`, `babel-parser`, `babel-plugin-proposal-do-expressions`, `babel-plugin-proposal-pipeline-operator`, `babel-plugin-transform-modules-commonjs`, `babel-plugin-transform-runtime`, `babel-preset-env`, `babel-standalone`, `babel-template`, `babel-traverse`, `babel-types`
+  * [#10228](https://github.com/babel/babel/pull/10228) Update dev dependencies and fix linting errors ([@danez](https://github.com/danez))
+* `babel-cli`
+  * [#10244](https://github.com/babel/babel/pull/10244) added flow to babel cli ([@Letladi](https://github.com/Letladi))
+
+#### :running_woman: Performance
+* `babel-helpers`, `babel-plugin-transform-modules-commonjs`, `babel-preset-env`
+  * [#10161](https://github.com/babel/babel/pull/10161) Improves the logic to import objects in helpers ([@ifsnow](https://github.com/ifsnow))
+* `babel-traverse`
+  * [#10243](https://github.com/babel/babel/pull/10243) perf: always return `void 0` as undefined node ([@JLHwung](https://github.com/JLHwung))
+
+## v7.5.5 (2019-07-17)
+
+#### :bug: Bug Fix
+* `babel-code-frame`
+  * [#10211](https://github.com/babel/babel/pull/10211) fix code-frame marker with highlighting ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-plugin-proposal-object-rest-spread`
+  * [#10200](https://github.com/babel/babel/pull/10200) Workaround #10179 in proposal-object-rest-spread ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-types`
+  * [#10198](https://github.com/babel/babel/pull/10198) add assertShape to validate templateElement ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-helper-create-class-features-plugin`, `babel-helper-member-expression-to-functions`, `babel-helper-replace-supers`, `babel-helpers`, `babel-plugin-proposal-class-properties`, `babel-plugin-transform-classes`, `babel-plugin-transform-object-super`, `babel-types`
+  * [#10017](https://github.com/babel/babel/pull/10017) destructuring private fields with array pattern / object pattern ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-plugin-transform-flow-comments`
+  * [#9901](https://github.com/babel/babel/pull/9901) fix transform-flow-comments for import types ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-core`, `babel-helpers`
+  * [#10208](https://github.com/babel/babel/pull/10208) always throw when add missing helpers ([@tanhauhau](https://github.com/tanhauhau))
+* `babel-plugin-transform-runtime`
+  * [#10207](https://github.com/babel/babel/pull/10207) Closes [#10205](https://github.com/babel/babel/issues/10205) ([@sag1v](https://github.com/sag1v))
+* `babel-helpers`, `babel-plugin-transform-instanceof`
+  * [#10197](https://github.com/babel/babel/pull/10197) fix: custom instOfHandler result should be cast to boolean ([@JLHwung](https://github.com/JLHwung))
+
+#### :house: Internal
+* `babel-parser`, `babel-plugin-transform-typescript`
+  * [#10014](https://github.com/babel/babel/pull/10014) Use correct extension for typescript fixtures ([@danez](https://github.com/danez))
+
+#### :running_woman: Performance
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`, `babel-preset-env`
+  * [#10189](https://github.com/babel/babel/pull/10189) perf: match ownKeys perf to the one of objectSpread ([@JLHwung](https://github.com/JLHwung))
+
+## v7.5.4 (2019-07-09)
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`, `babel-preset-env`
+  * [#10188](https://github.com/babel/babel/pull/10188) Fix _objectSpread2 for real ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+## v7.5.3 (2019-07-09)
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`, `babel-preset-env`
+  * [#10180](https://github.com/babel/babel/pull/10180) [_objectSpread2] Do not use hoisted var from prev iteration ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+
+## v7.5.2 (2019-07-08)
+
+#### :bug: Bug Fix
+* `babel-plugin-transform-typescript`
+  * [#10174](https://github.com/babel/babel/pull/10174) Do not trust Scope when removing TypeScript types ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`, `babel-preset-env`
+  * [#10171](https://github.com/babel/babel/pull/10171) Don't rely on getOwnPropertyDescriptors in objectSpread2 ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-proposal-export-default-from`, `babel-plugin-proposal-export-namespace-from`
+  * [#10172](https://github.com/babel/babel/pull/10172) fix: register injected importDeclaration ([@JLHwung](https://github.com/JLHwung))
+
+## v7.5.1 (2019-07-06)
+
+#### :bug: Bug Fix
+* `babel-helpers`, `babel-plugin-proposal-object-rest-spread`
+  * [#10170](https://github.com/babel/babel/pull/10170) Fix objectSpread2 backward compatibility ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
+* `babel-plugin-transform-typescript`
+  * [#10167](https://github.com/babel/babel/pull/10167) Retain typescript export-from-source ([@Wolvereness](https://github.com/Wolvereness))
 
 ## v7.5.0 (2019-07-04)
 
@@ -331,7 +697,7 @@ See [Babylon's CHANGELOG](packages/babylon/CHANGELOG.md) for the Babylon pre-7.0
 
 ## v7.3.3 (2019-02-15)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-generator`
   * [#9501](https://github.com/babel/babel/pull/9501) Correctly output escapes in directives ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
 
@@ -353,11 +719,11 @@ See [Babylon's CHANGELOG](packages/babylon/CHANGELOG.md) for the Babylon pre-7.0
   * [#9491](https://github.com/babel/babel/pull/9491) Better error output in parser tests ([@danez](https://github.com/danez))
 ## v7.3.2 (2019-02-04)
 
-Various spec compliancy fixes and better support for smart pipelines and private methods.
+Various spec compliance fixes and better support for smart pipelines and private methods.
 
 Thanks @gverni, @naffiq, @spondbob and @dstaley for their first PRs!
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-parser`
   * [#9403](https://github.com/babel/babel/pull/9403) Fix line continuation with Unicode line terminators. ([@danez](https://github.com/danez))
   * [#9400](https://github.com/babel/babel/pull/9400) Make yield a contextual keyword. ([@danez](https://github.com/danez))
@@ -405,7 +771,7 @@ This release fixes some regressions introduced in v7.3.0
 
 Thanks to @jamesgeorge007 and @armano2 for their first PR!
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-parser`
   * [#9314](https://github.com/babel/babel/pull/9314) Disallow async functions as loop body. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
   * [#9315](https://github.com/babel/babel/pull/9315) Parse class heritage as strict mode code. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
@@ -626,7 +992,7 @@ You can read more about this release at https://babeljs.io/blog/2018/12/03/7.2.0
 
 ## v7.1.5 (2018-11-06)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-parser`, `babylon`
   * [#7727](https://github.com/babel/babel/pull/7727) Fix await in function name and parameters. ([@nicolo-ribaudo](https://github.com/nicolo-ribaudo))
 
@@ -1089,7 +1455,7 @@ Fixed a peerDep issue
 
 Mostly bug fixes and some decorator updates
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-proposal-unicode-property-regex`
   * [#8127](https://github.com/babel/babel/pull/8127) Update plugin-proposal-unicode-property-regex for Unicode v11. ([@mathiasbynens](https://github.com/mathiasbynens))
 * `babel-parser`
@@ -1189,7 +1555,7 @@ Mostly bugfix release for a regression in decorators, and a quick fix for some n
 - Fix IE10 class regression
 - Various fixes, many TS fixes
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-parser`, `babel-plugin-proposal-json-strings`, `babel-plugin-syntax-json-strings`, `babel-preset-stage-3`
   * [#7985](https://github.com/babel/babel/pull/7985) Subsume json. ([@jridgewell](https://github.com/jridgewell))
 
@@ -1379,7 +1745,7 @@ Mostly bugfix release for a regression in decorators, and a quick fix for some n
 * `babel-generator`, `babel-helper-define-map`, `babel-plugin-syntax-class-properties`, `babel-plugin-transform-parameters`, `babel-plugin-transform-react-constant-elements`, `babel-traverse`, `babel-types`
   * [#7666](https://github.com/babel/babel/pull/7666) Private Properties phase 1. ([@jridgewell](https://github.com/jridgewell))
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-helper-simple-access`, `babel-plugin-transform-modules-commonjs`, `babel-plugin-transform-modules-systemjs`
   * [#7766](https://github.com/babel/babel/pull/7766) Correct update expression Number coercion. ([@jridgewell](https://github.com/jridgewell))
 * `babel-core`, `babel-generator`, `babel-plugin-proposal-decorators`, `babel-types`, `babylon`
@@ -1467,7 +1833,7 @@ Mostly bugfix release for a regression in decorators, and a quick fix for some n
 
 Various fixes, also lazy-load `@babel/core` dependencies (should make config lookup and other API methods fast for other projects to use).
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-proposal-logical-assignment-operators`
   * [#7604](https://github.com/babel/babel/pull/7604) Logical Assignment: ensure computed key isn't recomputed. ([@jridgewell](https://github.com/jridgewell))
 
@@ -1566,7 +1932,7 @@ We'll need to update tooling for this ^. Also published `gulp-babel@8.0.0-beta.2
 * `babel-register`
   * [#7416](https://github.com/babel/babel/pull/7416) Replace instead of merging babel-register options, and resolve cwd up front. ([@loganfsmyth](https://github.com/loganfsmyth))
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babylon`
   * [#7503](https://github.com/babel/babel/pull/7503) Update test262 test script and a few keyword escape fixes. ([@existentialism](https://github.com/existentialism))
   * [#7498](https://github.com/babel/babel/pull/7498) Disallow setters to have RestElement. ([@danez](https://github.com/danez))
@@ -1714,7 +2080,7 @@ We'll need to update tooling for this ^. Also published `gulp-babel@8.0.0-beta.2
 
 ## v7.0.0-beta.39 (2018-01-30)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-proposal-optional-chaining`
   * [#6345](https://github.com/babel/babel/pull/6345) Remove old optional chain features. ([@jridgewell](https://github.com/jridgewell))
 
@@ -1927,7 +2293,7 @@ Fixes + [overrides](https://github.com/babel/babel/pull/7091) config feature
 
 Various bug fixes, first version of Babel to use the MIT version of `regenerator`
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babylon`
   * [#6986](https://github.com/babel/babel/pull/6986) Fix destructuring assignment spec violation. ([@ksashikumar](https://github.com/ksashikumar))
 * `babel-helper-replace-supers`, `babel-helpers`, `babel-plugin-proposal-class-properties`, `babel-plugin-transform-classes`, `babel-plugin-transform-parameters`
@@ -1980,7 +2346,7 @@ Various bug fixes, first version of Babel to use the MIT version of `regenerator
 * `babel-preset-stage-1`, `babel-preset-stage-2`
   * [#6949](https://github.com/babel/babel/pull/6949) Fix stage refs to exportNamespaceFrom and exportDefaultFrom. ([@existentialism](https://github.com/existentialism))
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-preset-stage-0`, `babel-preset-stage-1`
   * [#6943](https://github.com/babel/babel/pull/6943) Moving Do expression to stage 1. ([@rajzshkr](https://github.com/rajzshkr))
 
@@ -1994,7 +2360,7 @@ Various bug fixes, first version of Babel to use the MIT version of `regenerator
 
 ## v7.0.0-beta.33 (2017-12-01)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-generator`, `babel-plugin-proposal-export-default-from`, `babel-plugin-proposal-export-default`, `babel-plugin-proposal-export-namespace-from`, `babel-plugin-proposal-export-namespace`, `babel-plugin-syntax-export-default-from`, `babel-plugin-syntax-export-extensions`, `babel-plugin-syntax-export-namespace-from`, `babel-standalone`, `babylon`
   * [#6920](https://github.com/babel/babel/pull/6920) Split exportExtensions into exportDefault and exportNamespace plugins…. ([@existentialism](https://github.com/existentialism))
 * `babylon`
@@ -2179,7 +2545,7 @@ Various bug fixes, first version of Babel to use the MIT version of `regenerator
 
 > Note: don't use ^ in your dependencies when using a beta. It can still break between (we should try not to do it but it can), so pin all the packages like `"@babel/cli" : "7.0.0-beta.4"`
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-transform-optional-chaining`
   * [#6525](https://github.com/babel/babel/pull/6525) Optional Chaining: Account for document.all. ([@azz](https://github.com/azz))
 * `babel-preset-env`, `babel-helper-remap-async-to-generator`, `babel-helpers`, `babel-plugin-transform-async-generator-functions`, `babel-plugin-transform-async-to-generator`, `babel-plugin-transform-function-sent`
@@ -2459,7 +2825,7 @@ let {...{}} = {}; let {...[]} = {};
 - Add `--config-file` CLI flag to explicitly pass a config location
 - Move `babel-standalone` into the repo (another form of this used to be `babel-browser`)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-transform-async-to-generator`, `babel-*`
   * [#6094](https://github.com/babel/babel/pull/6094) Spec compatibility for iteratorClose condition.. ([@yavorsky](https://github.com/yavorsky))
 * `babel-helpers`, `babel-plugin-transform-es2015-computed-properties`
@@ -2595,7 +2961,7 @@ Initial release of typescript equivalent of how Babel handles flow with a new `b
 
 ## v7.0.0-alpha.18 (2017-08-03)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-generator`, `babel-plugin-transform-flow-comments`, `babel-plugin-transform-flow-strip-types`, `babel-types`
   * [#5990](https://github.com/babel/babel/pull/5990) Flow opaque type aliases. ([@jbrown215](https://github.com/jbrown215))
 * `babel-preset-stage-3`
@@ -2644,9 +3010,9 @@ Initial release of typescript equivalent of how Babel handles flow with a new `b
 - Optional catch binding `try {} catch {}`: `babel-plugin-transform-optional-catch-binding`
 - es2015-parameters `loose` mode that doesn't use `arguments`
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-plugin-check-es2015-constants`
-  * [#5930](https://github.com/babel/babel/pull/5930) Spec compliancy of check-es2015-constants plugin. ([@maurobringolf](https://github.com/maurobringolf))
+  * [#5930](https://github.com/babel/babel/pull/5930) Spec compliance of check-es2015-constants plugin. ([@maurobringolf](https://github.com/maurobringolf))
 
 > Instead of throwing a compile time error when const is violated, Babel should insert a throw statement before the violation.
 
@@ -2951,7 +3317,7 @@ var A = function A() {
 
 ## v7.0.0-alpha.12 (2017-05-31)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-core`, `babel-generator`, `babel-plugin-syntax-numeric-separator`, `babel-plugin-transform-numeric-separator`, `babel-preset-stage-1`, `babel-template`, `babel-traverse`, `babel-types`
   * [#5793](https://github.com/babel/babel/pull/5793) Support for NumericLiteralSeparator, Stage 1 feature. ([@rwaldron](https://github.com/rwaldron))
 
@@ -2992,7 +3358,7 @@ var A = function A() {
 
 Update Babylon: https://github.com/babel/babylon/releases/tag/v7.0.0-beta.9, https://github.com/babel/babylon/releases/tag/v7.0.0-beta.10
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-generator`, `babel-plugin-transform-flow-strip-types`, `babel-types`
   * [#5525](https://github.com/babel/babel/pull/5525) Add support for object type spread. ([@conartist6](https://github.com/conartist6))
 
@@ -3066,7 +3432,7 @@ Update Babylon: https://github.com/babel/babylon/releases/tag/v7.0.0-beta.9, htt
 
 ## v7.0.0-alpha.8 (2017-04-17)
 
-#### :eyeglasses: Spec Compliancy
+#### :eyeglasses: Spec Compliance
 * `babel-preset-stage-2`, `babel-preset-stage-3`
   * [#5610](https://github.com/babel/babel/pull/5610) Move syntax-dynamic-import to stage-3. ([@dkaoster](https://github.com/dkaoster))
 

CONTRIBUTING.md

@@ -32,6 +32,7 @@ contributing, please read the
 - Follow along with what we are working on by joining our [Slack](https://babeljs.slack.com) (you can sign-up [here](https://slack.babeljs.io/)
     for an invite), following our announcements on [Twitter](https://twitter.com/babeljs), and reading (or participating!) in our [meeting notes](https://github.com/babel/notes).
 - Check out our [website](http://babeljs.io/) and the [repo](https://github.com/babel/website)
+- You can contribute by triaging issues which may include reproducing bug reports or asking for vital information, such as version numbers or reproduction instructions. If you would like to start triaging issues, one easy way to get started is to [subscribe to babel on CodeTriage](https://www.codetriage.com/babel/babel). [![Open Source Helpers](https://www.codetriage.com/babel/babel/badges/users.svg)](https://www.codetriage.com/babel/babel)
 
 ## Chat
 

Gulpfile.js

@@ -11,25 +11,20 @@ const filter = require("gulp-filter");
 const gulp = require("gulp");
 const path = require("path");
 const webpack = require("webpack");
-const merge = require("merge-stream");
 const rollup = require("rollup");
 const rollupBabel = require("rollup-plugin-babel");
 const rollupNodeResolve = require("rollup-plugin-node-resolve");
 const rollupReplace = require("rollup-plugin-replace");
 const { registerStandalonePackageTask } = require("./scripts/gulp-tasks");
 
-const sources = ["codemods", "packages"];
+const defaultSourcesGlob = "./@(codemods|packages)/*/src/**/*.js";
 
 function swapSrcWithLib(srcPath) {
   const parts = srcPath.split(path.sep);
-  parts[1] = "lib";
+  parts[2] = "lib";
   return parts.join(path.sep);
 }
 
-function getGlobFromSource(source) {
-  return `./${source}/*/src/**/*.js`;
-}
-
 function getIndexFromPackage(name) {
   return `${name}/src/index.js`;
 }
@@ -56,32 +51,28 @@ function rename(fn) {
   });
 }
 
-function buildBabel(exclude) {
+function buildBabel(exclude, sourcesGlob = defaultSourcesGlob) {
-  return merge(
+  const base = __dirname;
-    sources.map(source => {
-      const base = path.join(__dirname, source);
 
-      let stream = gulp.src(getGlobFromSource(source), { base: base });
+  let stream = gulp.src(sourcesGlob, { base: __dirname });
 
-      if (exclude) {
+  if (exclude) {
-        const filters = exclude.map(p => `!**/${p}/**`);
+    const filters = exclude.map(p => `!**/${p}/**`);
-        filters.unshift("**");
+    filters.unshift("**");
-        stream = stream.pipe(filter(filters));
+    stream = stream.pipe(filter(filters));
-      }
+  }
 
-      return stream
+  return stream
-        .pipe(errorsLogger())
+    .pipe(errorsLogger())
-        .pipe(newer({ dest: base, map: swapSrcWithLib }))
+    .pipe(newer({ dest: base, map: swapSrcWithLib }))
-        .pipe(compilationLogger())
+    .pipe(compilationLogger())
-        .pipe(babel())
+    .pipe(babel())
-        .pipe(
+    .pipe(
-          // Passing 'file.relative' because newer() above uses a relative
+      // Passing 'file.relative' because newer() above uses a relative
-          // path and this keeps it consistent.
+      // path and this keeps it consistent.
-          rename(file => path.resolve(file.base, swapSrcWithLib(file.relative)))
+      rename(file => path.resolve(file.base, swapSrcWithLib(file.relative)))
-        )
+    )
-        .pipe(gulp.dest(base));
+    .pipe(gulp.dest(base));
-    })
-  );
 }
 
 function buildRollup(packages) {
@@ -118,6 +109,9 @@ const bundles = ["packages/babel-parser"];
 
 gulp.task("build-rollup", () => buildRollup(bundles));
 gulp.task("build-babel", () => buildBabel(/* exclude */ bundles));
+gulp.task("build-babel-types", () =>
+  buildBabel(/* exclude */ bundles, "packages/babel-types/src/**/*.js")
+);
 gulp.task("build", gulp.parallel("build-rollup", "build-babel"));
 
 gulp.task("default", gulp.series("build"));
@@ -128,7 +122,7 @@ gulp.task(
   "watch",
   gulp.series("build-no-bundle", function watch() {
     gulpWatch(
-      sources.map(getGlobFromSource),
+      defaultSourcesGlob,
       { debounceDelay: 200 },
       gulp.task("build-no-bundle")
     );

Makefile

@@ -1,6 +1,5 @@
-MAKEFLAGS = -j1
 FLOW_COMMIT = 09669846b7a7ca5a6c23c12d56bb3bebdafd67e9
-TEST262_COMMIT = de567d3aa5de4eaa11e00131d26b9fe77997dfb0
+TEST262_COMMIT = 8688c4ab79059c3097098605e69f1ee5eda6c409
 
 # Fix color output until TravisCI fixes https://github.com/travis-ci/travis-ci/issues/7967
 export FORCE_COLOR = true
@@ -9,59 +8,110 @@ SOURCES = packages codemods
 
 .PHONY: build build-dist watch lint fix clean test-clean test-only test test-ci publish bootstrap
 
-build: clean clean-lib
+build: build-bundle
-	./node_modules/.bin/gulp build
-	node ./packages/babel-standalone/scripts/generate.js
-	node ./packages/babel-types/scripts/generateTypeHelpers.js
-	# call build again as the generated files might need to be compiled again.
-	./node_modules/.bin/gulp build
-	# generate flow and typescript typings
-	node packages/babel-types/scripts/generators/flow.js > ./packages/babel-types/lib/index.js.flow
-	node packages/babel-types/scripts/generators/typescript.js > ./packages/babel-types/lib/index.d.ts
 ifneq ("$(BABEL_COVERAGE)", "true")
-	make build-standalone
+	$(MAKE) build-standalone
-	make build-preset-env-standalone
 endif
 
-build-standalone:
+build-bundle: clean clean-lib
-	./node_modules/.bin/gulp build-babel-standalone
+	yarn gulp build
+	$(MAKE) generate-standalone generate-type-helpers
+	# call build again as the generated files might need to be compiled again.
+	yarn gulp build
+	$(MAKE) build-typings
+	$(MAKE) build-dist
+
+build-bundle-ci: bootstrap-only
+	$(MAKE) build-bundle
+
+generate-standalone:
+	node packages/babel-standalone/scripts/generate.js
+
+generate-type-helpers:
+	node packages/babel-types/scripts/generateTypeHelpers.js
+
+build-typings: build-flow-typings build-typescript-typings
+
+build-flow-typings:
+	node packages/babel-types/scripts/generators/flow.js > packages/babel-types/lib/index.js.flow
+
+build-typescript-typings:
+	node packages/babel-types/scripts/generators/typescript.js > packages/babel-types/lib/index.d.ts
+
+build-standalone: build-babel-standalone build-preset-env-standalone
+
+build-standalone-ci: build-bundle-ci
+	$(MAKE) build-standalone
+
+build-babel-standalone:
+	yarn gulp build-babel-standalone
 
 build-preset-env-standalone:
-	./node_modules/.bin/gulp build-babel-preset-env-standalone
+	yarn gulp build-babel-preset-env-standalone
 
 prepublish-build-standalone:
-	BABEL_ENV=production IS_PUBLISH=true ./node_modules/.bin/gulp build-babel-standalone
+	BABEL_ENV=production IS_PUBLISH=true yarn gulp build-babel-standalone
 
 prepublish-build-preset-env-standalone:
-	BABEL_ENV=production IS_PUBLISH=true ./node_modules/.bin/gulp build-babel-preset-env-standalone
+	BABEL_ENV=production IS_PUBLISH=true yarn gulp build-babel-preset-env-standalone
 
-build-dist: build
+build-dist: build-polyfill-dist build-plugin-transform-runtime-dist
+
+build-polyfill-dist:
 	cd packages/babel-polyfill; \
 	scripts/build-dist.sh
+
+build-plugin-transform-runtime-dist:
 	cd packages/babel-plugin-transform-runtime; \
 	node scripts/build-dist.js
 
-watch: clean clean-lib
+build-no-bundle: clean clean-lib
-
+	BABEL_ENV=development yarn gulp build-no-bundle
 	# Ensure that build artifacts for types are created during local
 	# development too.
-	BABEL_ENV=development ./node_modules/.bin/gulp build-no-bundle
+	$(MAKE) generate-type-helpers
-	node ./packages/babel-types/scripts/generateTypeHelpers.js
+	$(MAKE) build-typings
-	node packages/babel-types/scripts/generators/flow.js > ./packages/babel-types/lib/index.js.flow
+
-	node packages/babel-types/scripts/generators/typescript.js > ./packages/babel-types/lib/index.d.ts
+watch: build-no-bundle
-	BABEL_ENV=development ./node_modules/.bin/gulp watch
+	BABEL_ENV=development yarn gulp watch
+
+code-quality-ci: flowcheck-ci lint-ci
+
+flowcheck-ci: bootstrap-flowcheck
+	$(MAKE) flow
+
+code-quality: flow lint
 
 flow:
-	./node_modules/.bin/flow check --strip-root
+	yarn flow check --strip-root
 
-lint:
+bootstrap-flowcheck: bootstrap-only
-	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe
+	yarn gulp build-babel-types
+	$(MAKE) build-typings
 
-fix: fix-json
+lint-ci: lint-js-ci lint-ts-ci
-	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' --format=codeframe --fix
+
+lint-js-ci: bootstrap-only
+	$(MAKE) lint-js
+
+lint-ts-ci: bootstrap-flowcheck
+	$(MAKE) lint-ts
+
+lint: lint-js lint-ts
+
+lint-js:
+	yarn eslint scripts $(SOURCES) '*.js' --format=codeframe
+
+lint-ts:
+	scripts/tests/typescript/lint.sh
+
+fix: fix-json fix-js
+
+fix-js:
+	yarn eslint scripts $(SOURCES) '*.js' --format=codeframe --fix
 
 fix-json:
-	./node_modules/.bin/prettier "{packages,codemod}/*/test/fixtures/**/options.json" --write --loglevel warn
+	yarn prettier "{packages,codemod}/*/test/fixtures/**/options.json" --write --loglevel warn
 
 clean: test-clean
 	rm -f .npmrc
@@ -74,72 +124,80 @@ test-clean:
 	$(foreach source, $(SOURCES), \
 		$(call clean-source-test, $(source)))
 
+# Does not work on Windows; use "yarn jest" instead
 test-only:
 	BABEL_ENV=test ./scripts/test.sh
-	make test-clean
+	$(MAKE) test-clean
 
 test: lint test-only
 
-test-ci: bootstrap test-only
+test-ci: jest-ci
 
+jest-ci: build-standalone-ci
+	BABEL_ENV=test yarn jest --maxWorkers=4 --ci
+	$(MAKE) test-clean
+
+# Does not work on Windows
 test-ci-coverage: SHELL:=/bin/bash
 test-ci-coverage:
-	BABEL_COVERAGE=true BABEL_ENV=test make bootstrap
+	BABEL_COVERAGE=true BABEL_ENV=test $(MAKE) bootstrap
 	BABEL_ENV=test TEST_TYPE=cov ./scripts/test-cov.sh
 	bash <(curl -s https://codecov.io/bash) -f coverage/coverage-final.json
 
 bootstrap-flow:
-	rm -rf ./build/flow
+	rm -rf build/flow
-	mkdir -p ./build
+	mkdir -p build
-	git clone --branch=master --single-branch --shallow-since=2018-11-01 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:
 	node scripts/tests/flow/run_babel_parser_flow_tests.js
 
-test-flow-ci: bootstrap test-flow
+test-flow-ci: build-bundle-ci bootstrap-flow
+	$(MAKE) test-flow
 
 test-flow-update-whitelist:
 	node scripts/tests/flow/run_babel_parser_flow_tests.js --update-whitelist
 
 bootstrap-test262:
-	rm -rf ./build/test262
+	rm -rf build/test262
-	mkdir -p ./build
+	mkdir -p build
-	git clone --branch=master --single-branch --shallow-since=2019-01-01 https://github.com/tc39/test262.git ./build/test262
+	git clone --branch=master --single-branch --shallow-since=2019-09-01 https://github.com/tc39/test262.git build/test262
 	cd build/test262 && git checkout $(TEST262_COMMIT)
 
 test-test262:
 	node scripts/tests/test262/run_babel_parser_test262.js
 
-test-test262-ci: bootstrap test-test262
+test-test262-ci: build-bundle-ci bootstrap-test262
+	$(MAKE) test-test262
 
 test-test262-update-whitelist:
 	node scripts/tests/test262/run_babel_parser_test262.js --update-whitelist
 
+# Does not work on Windows
 clone-license:
 	./scripts/clone-license.sh
 
-prepublish-build:
+prepublish-build: clean-lib clean-runtime-helpers
-	make clean-lib
+	NODE_ENV=production BABEL_ENV=production $(MAKE) build
-	rm -rf packages/babel-runtime/helpers
+	$(MAKE) clone-license
-	rm -rf packages/babel-runtime-corejs2/helpers
-	rm -rf packages/babel-runtime-corejs2/core-js
-	NODE_ENV=production BABEL_ENV=production make build-dist
-	make clone-license
 
 prepublish:
-	make bootstrap-only
+	$(MAKE) bootstrap-only
-	make prepublish-build
+	$(MAKE) prepublish-build
-	make test
+	$(MAKE) test
 
 new-version:
 	git pull --rebase
-	./node_modules/.bin/lerna version --force-publish="@babel/runtime,@babel/runtime-corejs2,@babel/runtime-corejs3,@babel/standalone,@babel/preset-env-standalone"
+	yarn lerna version --force-publish="@babel/runtime,@babel/runtime-corejs2,@babel/runtime-corejs3,@babel/standalone,@babel/preset-env-standalone"
+
+publish-cerxes: prepublish
+	yarn lerna publish --registry="https://npm.cerxes.net" --force-publish --allow-branch initializers-fix --canary --preid csx --dist-tag csx
 
 # NOTE: Run make new-version first
 publish: prepublish
-	./node_modules/.bin/lerna publish from-git --require-scripts
+	yarn lerna publish from-git
-	make clean
+	$(MAKE) clean
 
 publish-ci: prepublish
 ifneq ("$(NPM_TOKEN)", "")
@@ -148,23 +206,30 @@ else
 	echo "Missing NPM_TOKEN env var"
 	exit 1
 endif
-	./node_modules/.bin/lerna publish from-git --require-scripts --yes
+	yarn lerna publish from-git --yes
 	rm -f .npmrc
-	make clean
+	$(MAKE) clean
 
-bootstrap-only: clean-all
+bootstrap-only: lerna-bootstrap
+
+yarn-install: clean-all
 	yarn --ignore-engines
-	./node_modules/.bin/lerna bootstrap -- --ignore-engines
+
+lerna-bootstrap: yarn-install
+	yarn lerna bootstrap
 
 bootstrap: bootstrap-only
-	make build
+	$(MAKE) build
-	cd packages/babel-plugin-transform-runtime; \
-	node scripts/build-dist.js
 
 clean-lib:
 	$(foreach source, $(SOURCES), \
 		$(call clean-source-lib, $(source)))
 
+clean-runtime-helpers:
+	rm -rf packages/babel-runtime/helpers
+	rm -rf packages/babel-runtime-corejs2/helpers
+	rm -rf packages/babel-runtime-corejs2/core-js
+
 clean-all:
 	rm -rf node_modules
 	rm -rf package-lock.json
@@ -173,7 +238,7 @@ clean-all:
 	$(foreach source, $(SOURCES), \
 		$(call clean-source-all, $(source)))
 
-	make clean
+	$(MAKE) clean
 
 define clean-source-lib
 	rm -rf $(1)/*/lib

README.md

@@ -4,16 +4,23 @@
   </a>
 </p>
 
+<p align="center">
+  <span style="color:darkred">
+    <b><i>WARNING</i> This is a fork of babel to test a fix for initializer-variables with class-properties (proposals-stuff)</b>
+  </span>
+</p>
+
 <p align="center">
   The compiler for writing next generation JavaScript.
 </p>
 
+
 <p align="center">
     <a href="https://www.npmjs.com/package/@babel/core"><img alt="v7 npm Downloads" src="https://img.shields.io/npm/dm/@babel/core.svg?maxAge=43200&label=v7%20downloads"></a>
   <a href="https://www.npmjs.com/package/babel-core"><img alt="v6 npm Downloads" src="https://img.shields.io/npm/dm/babel-core.svg?maxAge=43200&label=v6%20downloads"></a>
 </p>
 <p align="center">
-  <a href="https://travis-ci.org/babel/babel"><img alt="Travis Status" src="https://img.shields.io/travis/babel/babel/master.svg?label=travis&maxAge=43200"></a>
+  <a href="https://travis-ci.com/babel/babel"><img alt="Travis Status" src="https://img.shields.io/travis/com/babel/babel/master.svg?label=travis&maxAge=43200"></a>
   <a href="https://circleci.com/gh/babel/babel"><img alt="CircleCI Status" src="https://img.shields.io/circleci/project/github/babel/babel/master.svg?label=circle&maxAge=43200"></a>
   <a href="https://codecov.io/github/babel/babel"><img alt="Coverage Status" src="https://img.shields.io/codecov/c/github/babel/babel/master.svg?maxAge=43200"></a>
   <a href="https://slack.babeljs.io/"><img alt="Slack Status" src="https://slack.babeljs.io/badge.svg"></a>
@@ -80,14 +87,14 @@ Try it out at our [REPL](https://babeljs.io/repl/build/master#?code_lz=NoRgNATGD
 
 Mostly a handful of volunteers, funded by you! Please check out our [team page](https://babeljs.io/team)!
 
-### Looking for support?
-
-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?
 
 I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by [@angus-c](https://github.com/angus-c), [audio version](https://youtu.be/40abpedBKK8) by [@swyx](https://twitter.com/@swyx). Tweet us your recordings!
 
+### Looking for support?
+
+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).
+
 ### Where are the docs?
 
 Check out our website: [babeljs.io](https://babeljs.io/), and report issues/features at [babel/website](https://github.com/babel/website/issues).
@@ -98,12 +105,19 @@ Please read through our [CONTRIBUTING.md](CONTRIBUTING.md) and fill out the issu
 
 ### Want to contribute to Babel?
 
-Check out our [CONTRIBUTING.md](CONTRIBUTING.md) to get started with setting up the repo.
+Check out:
 
-- If you have already joined Slack, join our [#development](https://babeljs.slack.com/messages/development) channel and say hi!
+- Our [#development](https://babeljs.slack.com/messages/development) Slack channel and say hi ([signup](https://slack.babeljs.io))!
-- Check out the issues with the [good first issue](https://github.com/babel/babel/labels/good%20first%20issue) and [help wanted](https://github.com/babel/babel/labels/help%20wanted) label. We suggest also looking at the closed ones to get a sense of the kinds of issues you can tackle.
+- Issues with the [good first issue](https://github.com/babel/babel/labels/good%20first%20issue) and [help wanted](https://github.com/babel/babel/labels/help%20wanted) label. We suggest also looking at the [closed ones](https://github.com/babel/babel/issues?utf8=%E2%9C%93&q=is%3Aclosed+label%3A%22good+first+issue%22) to get a sense of the kinds of issues you can tackle.
+
+Some resources:
+
+- Our [CONTRIBUTING.md](CONTRIBUTING.md) to get started with setting up the repo.
 - Our discussions/notes/roadmap: [babel/notes](https://github.com/babel/notes)
 - Our progress on TC39 proposals: [babel/proposals](https://github.com/babel/proposals)
+- Our blog which contains release posts and explainations: [/blog](https://babeljs.io/blog)
+- Our videos page with talks about open source and Babel: [/videos](https://babeljs.io/videos)
+- Our [podcast](https://podcast.babeljs.io)
 
 ### How is the repo structured?
 

babel.config.js

@@ -77,9 +77,10 @@ module.exports = function(api) {
         "@babel/proposal-object-rest-spread",
         { useBuiltIns: true, loose: true },
       ],
+      "@babel/plugin-proposal-optional-chaining",
+      "@babel/plugin-proposal-nullish-coalescing-operator",
 
-      // Explicitly use the lazy version of CommonJS modules.
+      convertESM ? "@babel/transform-modules-commonjs" : null,
-      convertESM ? ["@babel/transform-modules-commonjs", { lazy: true }] : null,
     ].filter(Boolean),
     overrides: [
       {
@@ -90,18 +91,17 @@ module.exports = function(api) {
         ],
       },
       {
-        test: "./packages/babel-register",
+        test: ["./packages/babel-cli", "./packages/babel-core"],
         plugins: [
-          // Override the root options to disable lazy imports for babel-register
+          // Explicitly use the lazy version of CommonJS modules.
-          // because otherwise the require hook will try to lazy-import things
+          convertESM
-          // leading to dependency cycles.
+            ? ["@babel/transform-modules-commonjs", { lazy: true }]
-          convertESM ? "@babel/transform-modules-commonjs" : null,
+            : null,
         ].filter(Boolean),
       },
       {
         test: "./packages/babel-polyfill",
         presets: [["@babel/env", envOptsNoTargets]],
-        plugins: [["@babel/transform-modules-commonjs", { lazy: false }]],
       },
       {
         // The vast majority of our src files are modules, but we use

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

@@ -16,7 +16,7 @@
     "@babel/plugin-syntax-object-rest-spread": "^7.0.0"
   },
   "peerDependencies": {
-    "@babel/core": "^7.0.0-0"
+    "@babel/core": "^7.0.0-0 || csx"
   },
   "devDependencies": {
     "@babel/core": "^7.0.0",

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

@@ -16,7 +16,7 @@
     "@babel/plugin-syntax-optional-catch-binding": "^7.0.0"
   },
   "peerDependencies": {
-    "@babel/core": "^7.0.0-0"
+    "@babel/core": "^7.0.0-0 || csx"
   },
   "devDependencies": {
     "@babel/core": "^7.0.0",

doc/design/monorepo.md

@@ -15,7 +15,7 @@ This is quite taboo but let's look at the pros and cons:
  * Easy to coordinate changes across modules.
  * Single place to report issues.
  * Easier to setup a development environment.
- * Tests across modules are run together which finds bugs that touch multiple modules easier.
+ * Tests across modules are run together which finds bugs that touch multiple modules more easily.
 
 **Cons:**
 

lerna.json

@@ -1,5 +1,5 @@
 {
-  "version": "7.5.1",
+  "version": "7.7.3",
   "changelog": {
     "repo": "babel/babel",
     "cacheDir": ".changelog",
@@ -33,5 +33,8 @@
   "npmClient": "yarn",
   "npmClientArgs": [
     "--no-lockfile"
-  ]
+  ],
+  "publishConfig": {
+    "registry": "https://npm.cerxes.net"
+  }
 }

lib/third-party-libs.js.flow

@@ -165,7 +165,7 @@ declare module "source-map" {
 }
 
 declare module "convert-source-map" {
-  import type { SourceMap } from "source-map";
+  import type { SourceMap, SourceMapGenerator } from "source-map";
 
   declare class Converter {
     toJSON(): string;
@@ -177,11 +177,11 @@ declare module "convert-source-map" {
   declare module.exports: {
     SourceMap: SourceMap,
     Converter: Converter,
-    fromObject(obj: SourceMap): Converter,
+    fromObject(obj: SourceMap | SourceMapGenerator): Converter,
     fromJSON(str: string): Converter,
     fromBase64(str: string): Converter,
     fromComment(str: string): Converter,
-    fromMapFileComment(str: string): Converter,
+    fromMapFileComment(str: string, dir: string): Converter,
     fromSource(str: string): Converter,
     fromMapFileSource(str: string, dir: string): Converter,
     removeComments(str: string): string,

package.json

@@ -9,20 +9,22 @@
     "test": "make test"
   },
   "devDependencies": {
-    "@babel/cli": "^7.4.4",
+    "@babel/cli": "^7.6.0",
-    "@babel/core": "^7.4.5",
+    "@babel/core": "^7.6.0",
     "@babel/eslint-plugin-development": "^1.0.1",
-    "@babel/plugin-proposal-class-properties": "^7.4.4",
+    "@babel/plugin-proposal-class-properties": "^7.5.5",
-    "@babel/plugin-proposal-export-namespace-from": "^7.2.0",
+    "@babel/plugin-proposal-export-namespace-from": "^7.5.2",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.4.4",
     "@babel/plugin-proposal-numeric-separator": "^7.2.0",
-    "@babel/plugin-transform-modules-commonjs": "^7.4.4",
+    "@babel/plugin-proposal-optional-chaining": "^7.6.0",
-    "@babel/plugin-transform-runtime": "^7.4.4",
+    "@babel/plugin-transform-modules-commonjs": "^7.6.0",
-    "@babel/preset-env": "^7.4.5",
+    "@babel/plugin-transform-runtime": "^7.6.0",
+    "@babel/preset-env": "^7.6.0",
     "@babel/preset-flow": "^7.0.0",
-    "@babel/register": "^7.4.4",
+    "@babel/register": "^7.6.0",
-    "@babel/runtime": "^7.4.5",
+    "@babel/runtime": "^7.6.0",
     "babel-eslint": "^11.0.0-beta.0",
-    "babel-jest": "^24.8.0",
+    "babel-jest": "^24.9.0",
     "babel-loader": "^8.0.6",
     "babel-plugin-transform-charcodes": "^0.2.0",
     "browserify": "^16.2.3",
@@ -32,13 +34,13 @@
     "derequire": "^2.0.2",
     "duplicate-package-checker-webpack-plugin": "^2.1.0",
     "enhanced-resolve": "^3.0.0",
-    "eslint": "^5.16.0",
+    "eslint": "^6.0.1",
     "eslint-config-babel": "^9.0.0",
     "eslint-plugin-flowtype": "^3.8.2",
     "eslint-plugin-import": "^2.17.2",
     "eslint-plugin-prettier": "^3.1.0",
     "fancy-log": "^1.3.3",
-    "flow-bin": "^0.94.0",
+    "flow-bin": "^0.108.0",
     "graceful-fs": "^4.1.15",
     "gulp": "^4.0.2",
     "gulp-babel": "^8.0.0",
@@ -48,13 +50,12 @@
     "gulp-rename": "^1.4.0",
     "gulp-uglify": "^3.0.2",
     "gulp-watch": "^5.0.1",
-    "husky": "^2.3.0",
+    "husky": "^3.0.0",
-    "jest": "^24.8.0",
+    "jest": "^24.9.0",
-    "lerna": "^3.14.2",
+    "lerna": "^3.16.0",
     "lerna-changelog": "^0.5.0",
-    "lint-staged": "^8.1.7",
+    "lint-staged": "^9.2.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.13",
-    "merge-stream": "^1.0.1",
     "output-file-sync": "^2.0.0",
     "prettier": "^1.17.1",
     "pump": "^3.0.0",
@@ -63,18 +64,19 @@
     "rollup-plugin-babel": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.0.0",
     "rollup-plugin-replace": "^2.2.0",
-    "test262-stream": "^1.2.0",
+    "test262-stream": "^1.3.0",
     "through2": "^2.0.0",
+    "typescript": "^3.6.3",
     "warnings-to-errors-webpack-plugin": "^2.0.0",
     "webpack": "^3.4.1",
     "webpack-dependency-suite": "^2.4.4",
     "webpack-stream": "^4.0.0"
   },
   "resolutions": {
-    "@lerna/**/@lerna/collect-updates": "https://github.com/nicolo-ribaudo/lerna.git#babel-collect-updates"
+    "@lerna/**/@lerna/collect-updates": "https://github.com/babel/lerna.git#babel-collect-updates"
   },
   "engines": {
-    "node": ">= 6.9.0 < 13.0.0",
+    "node": ">= 6.9.0 < 14.0.0",
     "npm": ">= 3.x <= 6.x",
     "yarn": ">=0.27.5 || >=1.0.0-20170811"
   },
@@ -114,6 +116,7 @@
     ],
     "transformIgnorePatterns": [
       "/node_modules/",
+      "/packages/babel-standalone/babel.js",
       "<rootDir>/packages/babel-standalone/babel(\\.min)?\\.js",
       "<rootDir>/packages/babel-preset-env-standalone/babel-preset-env(\\.min)?\\.js",
       "/test/(fixtures|tmp|__data__)/",
@@ -134,6 +137,5 @@
     "moduleNameMapper": {
       "^@babel/([a-zA-Z0-9_-]+)$": "<rootDir>/packages/babel-$1/"
     }
-  },
+  }
-  "dependencies": {}
 }

packages/babel-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/cli",
-  "version": "7.5.0",
+  "version": "7.7.0",
   "description": "Babel command line.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -23,21 +23,20 @@
     "convert-source-map": "^1.1.0",
     "fs-readdir-recursive": "^1.1.0",
     "glob": "^7.0.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.13",
-    "mkdirp": "^0.5.1",
+    "make-dir": "^2.1.0",
-    "output-file-sync": "^2.0.0",
     "slash": "^2.0.0",
     "source-map": "^0.5.0"
   },
   "optionalDependencies": {
-    "chokidar": "^2.0.4"
+    "chokidar": "^2.1.8"
   },
   "peerDependencies": {
-    "@babel/core": "^7.0.0-0"
+    "@babel/core": "^7.0.0-0 || csx"
   },
   "devDependencies": {
-    "@babel/core": "^7.5.0",
+    "@babel/core": "^7.7.0",
-    "@babel/helper-fixtures": "^7.4.4"
+    "@babel/helper-fixtures": "^7.6.3"
   },
   "bin": {
     "babel": "./bin/babel.js",

packages/babel-cli/src/babel-external-helpers.js

@@ -1,7 +1,12 @@
+// @flow
+
 import commander from "commander";
 import { buildExternalHelpers } from "@babel/core";
 
-function collect(value, previousValue): Array<string> {
+function collect(
+  value: string | any,
+  previousValue: Array<string>,
+): Array<string> {
   // If the user passed the option with no value, like "babel-external-helpers --whitelist", do nothing.
   if (typeof value !== "string") return previousValue;
 

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

@@ -1,16 +1,26 @@
+// @flow
+
 import defaults from "lodash/defaults";
-import outputFileSync from "output-file-sync";
+import { sync as makeDirSync } from "make-dir";
-import { sync as mkdirpSync } from "mkdirp";
 import slash from "slash";
 import path from "path";
 import fs from "fs";
 
 import * as util from "./util";
+import { type CmdOptions } from "./options";
 
-export default async function({ cliOptions, babelOptions }) {
+function outputFileSync(filePath: string, data: string | Buffer): void {
+  makeDirSync(path.dirname(filePath));
+  fs.writeFileSync(filePath, data);
+}
+
+export default async function({
+  cliOptions,
+  babelOptions,
+}: CmdOptions): Promise<void> {
   const filenames = cliOptions.filenames;
 
-  async function write(src, base) {
+  async function write(src: string, base: string): Promise<boolean> {
     let relative = path.relative(base, src);
 
     if (!util.isCompilableExtension(relative, cliOptions.extensions)) {
@@ -65,14 +75,14 @@ export default async function({ cliOptions, babelOptions }) {
     }
   }
 
-  function getDest(filename, base) {
+  function getDest(filename: string, base: string): string {
     if (cliOptions.relative) {
       return path.join(base, cliOptions.outDir, filename);
     }
     return path.join(cliOptions.outDir, filename);
   }
 
-  async function handleFile(src, base) {
+  async function handleFile(src: string, base: string): Promise<boolean> {
     const written = await write(src, base);
 
     if (!written && cliOptions.copyFiles) {
@@ -84,7 +94,7 @@ export default async function({ cliOptions, babelOptions }) {
     return written;
   }
 
-  async function handle(filenameOrDir) {
+  async function handle(filenameOrDir: string): Promise<number> {
     if (!fs.existsSync(filenameOrDir)) return 0;
 
     const stat = fs.statSync(filenameOrDir);
@@ -116,18 +126,20 @@ export default async function({ cliOptions, babelOptions }) {
       util.deleteDir(cliOptions.outDir);
     }
 
-    mkdirpSync(cliOptions.outDir);
+    makeDirSync(cliOptions.outDir);
 
     let compiledFiles = 0;
     for (const filename of cliOptions.filenames) {
       compiledFiles += await handle(filename);
     }
 
-    console.log(
+    if (!cliOptions.quiet) {
-      `Successfully compiled ${compiledFiles} ${
+      console.log(
-        compiledFiles !== 1 ? "files" : "file"
+        `Successfully compiled ${compiledFiles} ${
-      } with Babel.`,
+          compiledFiles !== 1 ? "files" : "file"
-    );
+        } with Babel.`,
+      );
+    }
   }
 
   if (cliOptions.watch) {

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

@@ -1,14 +1,26 @@
+// @flow
+
 import convertSourceMap from "convert-source-map";
 import defaults from "lodash/defaults";
 import sourceMap from "source-map";
 import slash from "slash";
+import { sync as makeDirSync } from "make-dir";
 import path from "path";
 import fs from "fs";
 
 import * as util from "./util";
+import { type CmdOptions } from "./options";
 
-export default async function({ cliOptions, babelOptions }) {
+type CompilationOutput = {
-  function buildResult(fileResults) {
+  code: string,
+  map: Object,
+};
+
+export default async function({
+  cliOptions,
+  babelOptions,
+}: CmdOptions): Promise<void> {
+  function buildResult(fileResults: Array<Object>): CompilationOutput {
     const map = new sourceMap.SourceMapGenerator({
       file:
         cliOptions.sourceMapTarget ||
@@ -74,10 +86,12 @@ export default async function({ cliOptions, babelOptions }) {
     };
   }
 
-  function output(fileResults) {
+  function output(fileResults: Array<string>): void {
     const result = buildResult(fileResults);
 
     if (cliOptions.outFile) {
+      makeDirSync(path.dirname(cliOptions.outFile));
+
       // we've requested for a sourcemap to be written to disk
       if (babelOptions.sourceMaps && babelOptions.sourceMaps !== "inline") {
         const mapLoc = cliOptions.outFile + ".map";
@@ -91,14 +105,15 @@ export default async function({ cliOptions, babelOptions }) {
     }
   }
 
-  function readStdin() {
+  function readStdin(): Promise<string> {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve: Function, reject: Function): void => {
       let code = "";
 
       process.stdin.setEncoding("utf8");
 
       process.stdin.on("readable", function() {
         const chunk = process.stdin.read();
+        // $FlowIgnore
         if (chunk !== null) code += chunk;
       });
 
@@ -109,7 +124,7 @@ export default async function({ cliOptions, babelOptions }) {
     });
   }
 
-  async function stdin() {
+  async function stdin(): Promise<void> {
     const code = await readStdin();
 
     const res = await util.transform(
@@ -126,7 +141,7 @@ export default async function({ cliOptions, babelOptions }) {
     output([res]);
   }
 
-  async function walk(filenames) {
+  async function walk(filenames: Array<string>): Promise<void> {
     const _filenames = [];
 
     filenames.forEach(function(filename) {
@@ -151,7 +166,7 @@ export default async function({ cliOptions, babelOptions }) {
     });
 
     const results = await Promise.all(
-      _filenames.map(async function(filename) {
+      _filenames.map(async function(filename: string): Promise<Object> {
         let sourceFilename = filename;
         if (cliOptions.outFile) {
           sourceFilename = path.relative(
@@ -168,7 +183,7 @@ export default async function({ cliOptions, babelOptions }) {
               {
                 sourceFileName: sourceFilename,
                 // Since we're compiling everything to be merged together,
-                // "inline" applies to the final output file, but to the individual
+                // "inline" applies to the final output file, but not to the individual
                 // files being concatenated.
                 sourceMaps:
                   babelOptions.sourceMaps === "inline"
@@ -192,7 +207,7 @@ export default async function({ cliOptions, babelOptions }) {
     output(results);
   }
 
-  async function files(filenames) {
+  async function files(filenames: Array<string>): Promise<void> {
     if (!cliOptions.skipInitialBuild) {
       await walk(filenames);
     }
@@ -208,7 +223,7 @@ export default async function({ cliOptions, babelOptions }) {
             pollInterval: 10,
           },
         })
-        .on("all", function(type, filename) {
+        .on("all", function(type: string, filename: string) {
           if (!util.isCompilableExtension(filename, cliOptions.extensions)) {
             return;
           }

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

@@ -6,8 +6,12 @@ import fileCommand from "./file";
 
 const opts = parseArgv(process.argv);
 
-const fn = opts.cliOptions.outDir ? dirCommand : fileCommand;
+if (opts) {
-fn(opts).catch(err => {
+  const fn = opts.cliOptions.outDir ? dirCommand : fileCommand;
-  console.error(err);
+  fn(opts).catch(err => {
-  process.exit(1);
+    console.error(err);
-});
+    process.exitCode = 1;
+  });
+} else {
+  process.exitCode = 2;
+}

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

@@ -1,3 +1,5 @@
+// @flow
+
 import fs from "fs";
 
 import commander from "commander";
@@ -10,19 +12,19 @@ import pkg from "../../package.json";
 // Standard Babel input configs.
 commander.option(
   "-f, --filename [filename]",
-  "filename to use when reading from stdin - this will be used in source-maps, errors etc",
+  "The filename to use when reading from stdin. This will be used in source-maps, errors etc.",
 );
 commander.option(
   "--presets [list]",
-  "comma-separated list of preset names",
+  "A comma-separated list of preset names.",
   collect,
 );
 commander.option(
   "--plugins [list]",
-  "comma-separated list of plugin names",
+  "A comma-separated list of plugin names.",
   collect,
 );
-commander.option("--config-file [path]", "Path to a .babelrc file to use");
+commander.option("--config-file [path]", "Path to a .babelrc file to use.");
 commander.option(
   "--env-name [name]",
   "The name of the 'env' to use when loading configs and plugins. " +
@@ -38,97 +40,101 @@ commander.option(
 commander.option("--source-type [script|module]", "");
 commander.option(
   "--no-babelrc",
-  "Whether or not to look up .babelrc and .babelignore files",
+  "Whether or not to look up .babelrc and .babelignore files.",
 );
 commander.option(
   "--ignore [list]",
-  "list of glob paths to **not** compile",
+  "List of glob paths to **not** compile.",
   collect,
 );
 commander.option(
   "--only [list]",
-  "list of glob paths to **only** compile",
+  "List of glob paths to **only** compile.",
   collect,
 );
 
 // Misc babel config.
 commander.option(
   "--no-highlight-code",
-  "enable/disable ANSI syntax highlighting of code frames (on by default)",
+  "Enable or disable ANSI syntax highlighting of code frames. (on by default)",
 );
 
 // General output formatting.
 commander.option(
   "--no-comments",
-  "write comments to generated output (true by default)",
+  "Write comments to generated output. (true by default)",
 );
 commander.option(
   "--retain-lines",
-  "retain line numbers - will result in really ugly code",
+  "Retain line numbers. This will result in really ugly code.",
 );
 commander.option(
   "--compact [true|false|auto]",
-  "do not include superfluous whitespace characters and line terminators",
+  "Do not include superfluous whitespace characters and line terminators.",
   booleanify,
 );
-commander.option("--minified", "save as much bytes when printing [true|false]");
+commander.option(
+  "--minified [true|false]",
+  "Save as many bytes when printing.",
+);
 commander.option(
   "--auxiliary-comment-before [string]",
-  "print a comment before any injected non-user code",
+  "Print a comment before any injected non-user code.",
 );
 commander.option(
   "--auxiliary-comment-after [string]",
-  "print a comment after any injected non-user code",
+  "Print a comment after any injected non-user code.",
 );
 
 // General source map formatting.
 commander.option("-s, --source-maps [true|false|inline|both]", "", booleanify);
 commander.option(
   "--source-map-target [string]",
-  "set `file` on returned source map",
+  "Set `file` on returned source map.",
 );
 commander.option(
   "--source-file-name [string]",
-  "set `sources[0]` on returned source map",
+  "Set `sources[0]` on returned source map.",
 );
 commander.option(
   "--source-root [filename]",
-  "the root from which all sources are relative",
+  "The root from which all sources are relative.",
 );
 
 // Config params for certain module output formats.
 commander.option(
   "--module-root [filename]",
-  "optional prefix for the AMD module formatter that will be prepend to the filename on module definitions",
+  // eslint-disable-next-line max-len
+  "Optional prefix for the AMD module formatter that will be prepended to the filename on module definitions.",
 );
-commander.option("-M, --module-ids", "insert an explicit id for modules");
+commander.option("-M, --module-ids", "Insert an explicit id for modules.");
 commander.option(
   "--module-id [string]",
-  "specify a custom name for module ids",
+  "Specify a custom name for module ids.",
 );
 
 // "babel" command specific arguments that are not passed to @babel/core.
 commander.option(
   "-x, --extensions [extensions]",
-  "List of extensions to compile when a directory has been input [.es6,.js,.es,.jsx,.mjs]",
+  "List of extensions to compile when a directory has been the input. [.es6,.js,.es,.jsx,.mjs]",
   collect,
 );
 commander.option(
   "--keep-file-extension",
-  "Preserve the file extensions of the input files",
+  "Preserve the file extensions of the input files.",
 );
-commander.option("-w, --watch", "Recompile files on changes");
+commander.option("-w, --watch", "Recompile files on changes.");
 commander.option(
   "--skip-initial-build",
-  "Do not compile files before watching",
+  "Do not compile files before watching.",
 );
 commander.option(
   "-o, --out-file [out]",
-  "Compile all input files into a single file",
+  "Compile all input files into a single file.",
 );
 commander.option(
   "-d, --out-dir [out]",
-  "Compile an input directory of modules into an output directory",
+  "Compile an input directory of modules into an output directory.",
 );
 commander.option(
   "--relative",
@@ -136,22 +142,34 @@ commander.option(
 );
 commander.option(
   "-D, --copy-files",
-  "When compiling a directory copy over non-compilable files",
+  "When compiling a directory copy over non-compilable files.",
 );
 commander.option(
   "--include-dotfiles",
-  "Include dotfiles when compiling and copying non-compilable files",
+  "Include dotfiles when compiling and copying non-compilable files.",
+);
+commander.option(
+  "--verbose",
+  "Log everything. This option conflicts with --quiet",
+);
+commander.option(
+  "--quiet",
+  "Don't log anything. This option conflicts with --verbose",
 );
-commander.option("--verbose", "Log everything");
 commander.option(
   "--delete-dir-on-start",
-  "Delete the out directory before compilation",
+  "Delete the out directory before compilation.",
 );
 
 commander.version(pkg.version + " (@babel/core " + version + ")");
 commander.usage("[options] <files ...>");
 
-export default function parseArgv(args: Array<string>) {
+export type CmdOptions = {
+  babelOptions: Object,
+  cliOptions: Object,
+};
+
+export default function parseArgv(args: Array<string>): CmdOptions | null {
   //
   commander.parse(args);
 
@@ -200,6 +218,10 @@ export default function parseArgv(args: Array<string>) {
     errors.push("--delete-dir-on-start requires --out-dir");
   }
 
+  if (commander.verbose && commander.quiet) {
+    errors.push("--verbose and --quiet cannot be used together");
+  }
+
   if (
     !commander.outDir &&
     filenames.length === 0 &&
@@ -216,7 +238,7 @@ export default function parseArgv(args: Array<string>) {
     errors.forEach(function(e) {
       console.error("  " + e);
     });
-    process.exit(2);
+    return null;
   }
 
   const opts = commander.opts();
@@ -275,6 +297,7 @@ export default function parseArgv(args: Array<string>) {
       copyFiles: opts.copyFiles,
       includeDotfiles: opts.includeDotfiles,
       verbose: opts.verbose,
+      quiet: opts.quiet,
       deleteDirOnStart: opts.deleteDirOnStart,
       sourceMapTarget: opts.sourceMapTarget,
     },

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

@@ -1,10 +1,12 @@
+// @flow
+
 import readdirRecursive from "fs-readdir-recursive";
 import * as babel from "@babel/core";
 import includes from "lodash/includes";
 import path from "path";
 import fs from "fs";
 
-export function chmod(src, dest) {
+export function chmod(src: string, dest: string): void {
   fs.chmodSync(dest, fs.statSync(src).mode);
 }
 
@@ -13,8 +15,8 @@ type ReaddirFilter = (filename: string) => boolean;
 export function readdir(
   dirname: string,
   includeDotfiles: boolean,
-  filter: ReaddirFilter,
+  filter?: ReaddirFilter,
-) {
+): Array<string> {
   return readdirRecursive(dirname, (filename, _index, currentDirectory) => {
     const stat = fs.statSync(path.join(currentDirectory, filename));
 
@@ -30,7 +32,7 @@ export function readdirForCompilable(
   dirname: string,
   includeDotfiles: boolean,
   altExts?: Array<string>,
-) {
+): Array<string> {
   return readdir(dirname, includeDotfiles, function(filename) {
     return isCompilableExtension(filename, altExts);
   });
@@ -48,7 +50,7 @@ export function isCompilableExtension(
   return includes(exts, ext);
 }
 
-export function addSourceMappingUrl(code, loc) {
+export function addSourceMappingUrl(code: string, loc: string): string {
   return code + "\n//# sourceMappingURL=" + path.basename(loc);
 }
 
@@ -56,7 +58,11 @@ const CALLER = {
   name: "@babel/cli",
 };
 
-export function transform(filename, code, opts) {
+export function transform(
+  filename: string,
+  code: string,
+  opts: Object,
+): Promise<Object> {
   opts = {
     ...opts,
     caller: CALLER,
@@ -71,7 +77,10 @@ export function transform(filename, code, opts) {
   });
 }
 
-export function compile(filename, opts) {
+export function compile(
+  filename: string,
+  opts: Object | Function,
+): Promise<Object> {
   opts = {
     ...opts,
     caller: CALLER,
@@ -85,7 +94,7 @@ export function compile(filename, opts) {
   });
 }
 
-export function deleteDir(path) {
+export function deleteDir(path: string): void {
   if (fs.existsSync(path)) {
     fs.readdirSync(path).forEach(function(file) {
       const curPath = path + "/" + file;
@@ -103,10 +112,10 @@ export function deleteDir(path) {
 
 process.on("uncaughtException", function(err) {
   console.error(err);
-  process.exit(1);
+  process.exitCode = 1;
 });
 
-export function requireChokidar() {
+export function requireChokidar(): Object {
   try {
     return require("chokidar");
   } catch (err) {
@@ -118,7 +127,10 @@ export function requireChokidar() {
   }
 }
 
-export function adjustRelative(relative, keepFileExtension) {
+export function adjustRelative(
+  relative: string,
+  keepFileExtension: boolean,
+): string {
   if (keepFileExtension) {
     return relative;
   }

packages/babel-cli/test/fixtures/babel/filename --out-file deep/in-files/script.js

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

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

@@ -0,0 +1,3 @@
+{
+  "args": ["script.js", "--out-file", "folder/nested/script.js"]
+}

packages/babel-cli/test/fixtures/babel/filename --out-file deep/out-files/folder/nested/script.js

@@ -0,0 +1,5 @@
+"use strict";
+
+arr.map(function (x) {
+  return x * MULTIPLIER;
+});

packages/babel-cli/test/fixtures/babel/stdin --filename windows/options.json

@@ -0,0 +1,5 @@
+{
+  "args": ["--filename", "test.js"],
+  "stderrContains": true,
+  "os": ["win32"]
+}

packages/babel-cli/test/fixtures/babel/stdin --filename windows/stderr.txt

@@ -0,0 +1 @@
+SyntaxError: <CWD>\test.js: Unexpected token, expected ";" (2:10)

packages/babel-cli/test/fixtures/babel/stdin --filename windows/stdin.txt

@@ -0,0 +1,3 @@
+arr.map(function () {
+  return $]!;
+});

packages/babel-cli/test/fixtures/babel/stdin --filename/options.json

@@ -1,4 +1,5 @@
 {
   "args": ["--filename", "test.js"],
-  "stderrContains": true
+  "stderrContains": true,
+  "os": ["linux", "darwin"]
 }

packages/babel-cli/test/index.js

@@ -1,7 +1,7 @@
 const readdir = require("fs-readdir-recursive");
 const helper = require("@babel/helper-fixtures");
 const rimraf = require("rimraf");
-const outputFileSync = require("output-file-sync");
+const { sync: makeDirSync } = require("make-dir");
 const child = require("child_process");
 const merge = require("lodash/merge");
 const path = require("path");
@@ -14,6 +14,11 @@ const fileFilter = function(x) {
   return x !== ".DS_Store";
 };
 
+const outputFileSync = function(filePath, data) {
+  makeDirSync(path.dirname(filePath));
+  fs.writeFileSync(filePath, data);
+};
+
 const presetLocs = [path.join(__dirname, "../../babel-preset-react")];
 
 const pluginLocs = [
@@ -92,7 +97,7 @@ const assertTest = function(stdout, stderr, opts, cwd) {
       if (
         // saveInFiles always creates an empty .babelrc, so lets exclude for now
         filename !== ".babelrc" &&
-        !opts.inFiles.hasOwnProperty(filename)
+        !Object.prototype.hasOwnProperty.call(opts.inFiles, filename)
       ) {
         const expected = opts.outFiles[filename];
         const actual = actualFiles[filename];
@@ -115,13 +120,6 @@ const buildTest = function(binName, testName, opts) {
   const binLoc = path.join(__dirname, "../lib", binName);
 
   return function(callback) {
-    const dir = process.cwd();
-
-    process.chdir(__dirname);
-    if (fs.existsSync(tmpLoc)) rimraf.sync(tmpLoc);
-    fs.mkdirSync(tmpLoc);
-    process.chdir(tmpLoc);
-
     saveInFiles(opts.inFiles);
 
     let args = [binLoc];
@@ -159,7 +157,6 @@ const buildTest = function(binName, testName, opts) {
           args.map(arg => `"${arg}"`).join(" ") + ": " + err.message;
       }
 
-      process.chdir(dir);
       callback(err);
     });
 
@@ -175,6 +172,26 @@ fs.readdirSync(fixtureLoc).forEach(function(binName) {
 
   const suiteLoc = path.join(fixtureLoc, binName);
   describe("bin/" + binName, function() {
+    let cwd;
+
+    beforeEach(() => {
+      cwd = process.cwd();
+
+      if (fs.existsSync(tmpLoc)) {
+        for (const child of fs.readdirSync(tmpLoc)) {
+          rimraf.sync(path.join(tmpLoc, child));
+        }
+      } else {
+        fs.mkdirSync(tmpLoc);
+      }
+
+      process.chdir(tmpLoc);
+    });
+
+    afterEach(() => {
+      process.chdir(cwd);
+    });
+
     fs.readdirSync(suiteLoc).forEach(function(testName) {
       if (testName.startsWith(".")) return;
 
@@ -185,7 +202,29 @@ fs.readdirSync(fixtureLoc).forEach(function(binName) {
       };
 
       const optionsLoc = path.join(testLoc, "options.json");
-      if (fs.existsSync(optionsLoc)) merge(opts, require(optionsLoc));
+      if (fs.existsSync(optionsLoc)) {
+        const taskOpts = require(optionsLoc);
+        if (taskOpts.os) {
+          let os = taskOpts.os;
+
+          if (!Array.isArray(os) && typeof os !== "string") {
+            throw new Error(
+              `'os' should be either string or string array: ${taskOpts.os}`,
+            );
+          }
+
+          if (typeof os === "string") {
+            os = [os];
+          }
+
+          if (!os.includes(process.platform)) {
+            return;
+          }
+
+          delete taskOpts.os;
+        }
+        merge(opts, taskOpts);
+      }
 
       ["stdout", "stdin", "stderr"].forEach(function(key) {
         const loc = path.join(testLoc, key + ".txt");
@@ -205,7 +244,7 @@ fs.readdirSync(fixtureLoc).forEach(function(binName) {
         opts.inFiles[".babelrc"] = helper.readFile(babelrcLoc);
       }
 
-      it(testName, buildTest(binName, testName, opts));
+      it(testName, buildTest(binName, testName, opts), 20000);
     });
   });
 });

packages/babel-code-frame/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/code-frame",
-  "version": "7.0.0",
+  "version": "7.5.5",
   "description": "Generate errors that contain a code frame that point to source locations.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",

packages/babel-code-frame/src/index.js

@@ -76,7 +76,7 @@ function getMarkerLines(
       } else if (i === 0) {
         const sourceLength = source[lineNumber - 1].length;
 
-        markerLines[lineNumber] = [startColumn, sourceLength - startColumn];
+        markerLines[lineNumber] = [startColumn, sourceLength - startColumn + 1];
       } else if (i === lineDiff) {
         markerLines[lineNumber] = [0, endColumn];
       } else {
@@ -112,15 +112,16 @@ export function codeFrameColumns(
   const maybeHighlight = (chalkFn, string) => {
     return highlighted ? chalkFn(string) : string;
   };
-  if (highlighted) rawLines = highlight(rawLines, opts);
-
   const lines = rawLines.split(NEWLINE);
   const { start, end, markerLines } = getMarkerLines(loc, lines, opts);
   const hasColumns = loc.start && typeof loc.start.column === "number";
 
   const numberMaxWidth = String(end).length;
 
-  let frame = lines
+  const highlightedLines = highlighted ? highlight(rawLines, opts) : rawLines;
+
+  let frame = highlightedLines
+    .split(NEWLINE)
     .slice(start, end)
     .map((line, index) => {
       const number = start + 1 + index;

packages/babel-code-frame/test/index.js

@@ -102,6 +102,45 @@ describe("@babel/code-frame", function() {
     );
   });
 
+  test("opts.highlightCode with multiple columns and lines", function() {
+    // prettier-ignore
+    const rawLines = [
+      "function a(b, c) {", 
+      "  return b + c;", 
+      "}"
+    ].join("\n");
+
+    const result = codeFrameColumns(
+      rawLines,
+      {
+        start: {
+          line: 1,
+          column: 1,
+        },
+        end: {
+          line: 3,
+          column: 1,
+        },
+      },
+      {
+        highlightCode: true,
+        message: "Message about things",
+      },
+    );
+    const stripped = stripAnsi(result);
+    expect(stripped).toEqual(
+      // prettier-ignore
+      [
+        "> 1 | function a(b, c) {",
+        "    | ^^^^^^^^^^^^^^^^^^",
+        "> 2 |   return b + c;",
+        "    | ^^^^^^^^^^^^^^^",
+        "> 3 | }",
+        "    | ^ Message about things",
+      ].join('\n'),
+    );
+  });
+
   test("opts.linesAbove", function() {
     const rawLines = [
       "/**",

packages/babel-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/core",
-  "version": "7.5.0",
+  "version": "7.7.2",
   "description": "Babel compiler core.",
   "main": "lib/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
@@ -33,23 +33,22 @@
     "./lib/transform-file.js": "./lib/transform-file-browser.js"
   },
   "dependencies": {
-    "@babel/code-frame": "^7.0.0",
+    "@babel/code-frame": "^7.5.5",
-    "@babel/generator": "^7.5.0",
+    "@babel/generator": "^7.7.2",
-    "@babel/helpers": "^7.5.0",
+    "@babel/helpers": "^7.7.0",
-    "@babel/parser": "^7.5.0",
+    "@babel/parser": "^7.7.2",
-    "@babel/template": "^7.4.4",
+    "@babel/template": "^7.7.0",
-    "@babel/traverse": "^7.5.0",
+    "@babel/traverse": "^7.7.2",
-    "@babel/types": "^7.5.0",
+    "@babel/types": "^7.7.2",
-    "convert-source-map": "^1.1.0",
+    "convert-source-map": "^1.7.0",
     "debug": "^4.1.0",
     "json5": "^2.1.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.13",
     "resolve": "^1.3.2",
     "semver": "^5.4.1",
     "source-map": "^0.5.0"
   },
   "devDependencies": {
-    "@babel/helper-transform-fixture-test-runner": "^7.5.0",
+    "@babel/helper-transform-fixture-test-runner": "^7.6.4"
-    "@babel/register": "^7.4.4"
   }
 }

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

@@ -268,13 +268,11 @@ function babelrcLoadEnabled(
   });
 }
 
-const validateConfigFile = makeWeakCache(
+const validateConfigFile = makeWeakCache((file: ConfigFile): ValidatedFile => ({
-  (file: ConfigFile): ValidatedFile => ({
+  filepath: file.filepath,
-    filepath: file.filepath,
+  dirname: file.dirname,
-    dirname: file.dirname,
+  options: validate("configfile", file.options),
-    options: validate("configfile", file.options),
+}));
-  }),
-);
 
 const validateBabelrcFile = makeWeakCache(
   (file: ConfigFile): ValidatedFile => ({
@@ -284,13 +282,11 @@ const validateBabelrcFile = makeWeakCache(
   }),
 );
 
-const validateExtendFile = makeWeakCache(
+const validateExtendFile = makeWeakCache((file: ConfigFile): ValidatedFile => ({
-  (file: ConfigFile): ValidatedFile => ({
+  filepath: file.filepath,
-    filepath: file.filepath,
+  dirname: file.dirname,
-    dirname: file.dirname,
+  options: validate("extendsfile", file.options),
-    options: validate("extendsfile", file.options),
+}));
-  }),
-);
 
 /**
  * Build a config chain for just the programmatic options passed into Babel.
@@ -549,7 +545,7 @@ function normalizeOptions(opts: ValidatedOptions): ValidatedOptions {
 
   // "sourceMap" is just aliased to sourceMap, so copy it over as
   // we merge the options together.
-  if (options.hasOwnProperty("sourceMap")) {
+  if (Object.prototype.hasOwnProperty.call(options, "sourceMap")) {
     options.sourceMaps = options.sourceMap;
     delete options.sourceMap;
   }

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

@@ -345,6 +345,7 @@ function assertNoDuplicates(items: Array<UnloadedDescriptor>): void {
     }
 
     if (nameMap.has(item.name)) {
+      const conflicts = items.filter(i => i.value === item.value);
       throw new Error(
         [
           `Duplicate plugin/preset detected.`,
@@ -355,6 +356,9 @@ function assertNoDuplicates(items: Array<UnloadedDescriptor>): void {
           `    ['some-plugin', {}],`,
           `    ['some-plugin', {}, 'some unique name'],`,
           `  ]`,
+          ``,
+          `Duplicates detected are:`,
+          `${JSON.stringify(conflicts, null, 2)}`,
         ].join("\n"),
       );
     }

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

@@ -18,18 +18,22 @@ import type { CallerMetadata } from "../validation/options";
 
 const debug = buildDebug("babel:config:loading:files:configuration");
 
-const BABEL_CONFIG_JS_FILENAME = "babel.config.js";
+const ROOT_CONFIG_FILENAMES = [
+  "babel.config.js",
+  "babel.config.cjs",
+  "babel.config.json",
+];
+const RELATIVE_CONFIG_FILENAMES = [".babelrc", ".babelrc.js", ".babelrc.cjs"];
 
-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))) {
+    const configFileFound = ROOT_CONFIG_FILENAMES.some(filename =>
-      return dirname;
+      fs.existsSync(path.join(dirname, filename)),
-    }
+    );
+    if (configFileFound) return dirname;
 
     const nextDir = path.dirname(dirname);
     if (dirname === nextDir) break;
@@ -51,45 +55,15 @@ export function findRelativeConfig(
 
   for (const loc of packageData.directories) {
     if (!config) {
-      config = [BABELRC_FILENAME, BABELRC_JS_FILENAME].reduce(
+      config = loadOneConfig(
-        (previousConfig: ConfigFile | null, name) => {
+        RELATIVE_CONFIG_FILENAMES,
-          const filepath = path.join(loc, name);
+        loc,
-          const config = readConfig(filepath, envName, caller);
+        envName,
-
+        caller,
-          if (config && previousConfig) {
-            throw new Error(
-              `Multiple configuration files found. Please remove one:\n` +
-                ` - ${path.basename(previousConfig.filepath)}\n` +
-                ` - ${name}\n` +
-                `from ${loc}`,
-            );
-          }
-
-          return config || previousConfig;
-        },
-        null,
-      );
-
-      const pkgConfig =
         packageData.pkg && packageData.pkg.dirname === loc
           ? packageToBabelConfig(packageData.pkg)
-          : null;
+          : null,
-
+      );
-      if (pkgConfig) {
-        if (config) {
-          throw new Error(
-            `Multiple configuration files found. Please remove one:\n` +
-              ` - ${path.basename(pkgConfig.filepath)}#babel\n` +
-              ` - ${path.basename(config.filepath)}\n` +
-              `from ${loc}`,
-          );
-        }
-        config = pkgConfig;
-      }
-
-      if (config) {
-        debug("Found configuration %o from %o.", config.filepath, dirname);
-      }
     }
 
     if (!ignore) {
@@ -110,13 +84,36 @@ export function findRootConfig(
   envName: string,
   caller: CallerMetadata | void,
 ): ConfigFile | null {
-  const filepath = path.resolve(dirname, BABEL_CONFIG_JS_FILENAME);
+  return loadOneConfig(ROOT_CONFIG_FILENAMES, dirname, envName, caller);
+}
 
-  const conf = readConfig(filepath, envName, caller);
+function loadOneConfig(
-  if (conf) {
+  names: string[],
-    debug("Found root config %o in %o.", BABEL_CONFIG_JS_FILENAME, dirname);
+  dirname: string,
+  envName: string,
+  caller: CallerMetadata | void,
+  previousConfig?: ConfigFile | null = null,
+): ConfigFile | null {
+  const config = names.reduce((previousConfig: ConfigFile | null, name) => {
+    const filepath = path.resolve(dirname, name);
+    const config = readConfig(filepath, envName, caller);
+
+    if (config && previousConfig) {
+      throw new Error(
+        `Multiple configuration files found. Please remove one:\n` +
+          ` - ${path.basename(previousConfig.filepath)}\n` +
+          ` - ${name}\n` +
+          `from ${dirname}`,
+      );
+    }
+
+    return config || previousConfig;
+  }, previousConfig);
+
+  if (config) {
+    debug("Found configuration %o from %o.", config.filepath, dirname);
   }
-  return conf;
+  return config;
 }
 
 export function loadConfig(
@@ -141,7 +138,8 @@ export function loadConfig(
  * throw if there are parsing errors while loading a config.
  */
 function readConfig(filepath, envName, caller): ConfigFile | null {
-  return path.extname(filepath) === ".js"
+  const ext = path.extname(filepath);
+  return ext === ".js" || ext === ".cjs"
     ? readConfigJS(filepath, { envName, caller })
     : readConfigJSON5(filepath);
 }

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

@@ -18,6 +18,7 @@ import { validatePluginObject } from "./validation/plugins";
 import makeAPI from "./helpers/config-api";
 
 import loadPrivatePartialConfig from "./partial";
+import type { ValidatedOptions } from "./validation/options";
 
 type LoadedDescriptor = {
   value: {},
@@ -278,6 +279,42 @@ const instantiatePlugin = makeWeakCache(
   },
 );
 
+const validateIfOptionNeedsFilename = (
+  options: ValidatedOptions,
+  descriptor: UnloadedDescriptor,
+): void => {
+  if (options.test || options.include || options.exclude) {
+    const formattedPresetName = descriptor.name
+      ? `"${descriptor.name}"`
+      : "/* your preset */";
+    throw new Error(
+      [
+        `Preset ${formattedPresetName} requires a filename to be set when babel is called directly,`,
+        `\`\`\``,
+        `babel.transform(code, { filename: 'file.ts', presets: [${formattedPresetName}] });`,
+        `\`\`\``,
+        `See https://babeljs.io/docs/en/options#filename for more information.`,
+      ].join("\n"),
+    );
+  }
+};
+
+const validatePreset = (
+  preset: PresetInstance,
+  context: ConfigContext,
+  descriptor: UnloadedDescriptor,
+): void => {
+  if (!context.filename) {
+    const { options } = preset;
+    validateIfOptionNeedsFilename(options, descriptor);
+    if (options.overrides) {
+      options.overrides.forEach(overrideOptions =>
+        validateIfOptionNeedsFilename(overrideOptions, descriptor),
+      );
+    }
+  }
+};
+
 /**
  * Generate a config object that will act as the root of a new nested config.
  */
@@ -285,10 +322,9 @@ const loadPresetDescriptor = (
   descriptor: UnloadedDescriptor,
   context: ConfigContext,
 ): ConfigChain | null => {
-  return buildPresetChain(
+  const preset = instantiatePreset(loadDescriptor(descriptor, context));
-    instantiatePreset(loadDescriptor(descriptor, context)),
+  validatePreset(preset, context, descriptor);
-    context,
+  return buildPresetChain(preset, context);
-  );
 };
 
 const instantiatePreset = makeWeakCache(

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

@@ -70,7 +70,7 @@ function assertVersion(range: string | number): void {
     throw new Error("Expected string or integer value.");
   }
 
-  if (semver.satisfies(coreVersion, range)) return;
+  if (semver.satisfies(semver.coerce(coreVersion).raw, range)) return;
 
   const limit = Error.stackTraceLimit;
 

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

@@ -278,7 +278,7 @@ export function assertConfigFileSearch(
   ) {
     throw new Error(
       `${msg(loc)} must be a undefined, a boolean, a string, ` +
-        `got ${JSON.stringify(value)}`,
+        `got ${JSON.stringify((value: any))}`,
     );
   }
 
@@ -302,7 +302,7 @@ export function assertBabelrcSearch(
   } else if (!checkValidTest(value)) {
     throw new Error(
       `${msg(loc)} must be a undefined, a boolean, a string/Function/RegExp ` +
-        `or an array of those, got ${JSON.stringify(value)}`,
+        `or an array of those, got ${JSON.stringify((value: any))}`,
     );
   }
   return (value: any);

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

@@ -272,7 +272,8 @@ export type OptionsSource =
   | "configfile"
   | "babelrcfile"
   | "extendsfile"
-  | "preset";
+  | "preset"
+  | "plugin";
 
 type RootPath = $ReadOnly<{
   type: "root",

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

@@ -84,10 +84,19 @@ export type PluginObject = {
 };
 
 export function validatePluginObject(obj: {}): PluginObject {
+  const rootPath: RootPath = {
+    type: "root",
+    source: "plugin",
+  };
   Object.keys(obj).forEach(key => {
     const validator = VALIDATORS[key];
+    const optLoc = {
+      type: "option",
+      name: key,
+      parent: rootPath,
+    };
 
-    if (validator) validator(key, obj[key]);
+    if (validator) validator(optLoc, obj[key]);
     else throw new Error(`.${key} is not a valid Plugin property`);
   });
 

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

@@ -19,6 +19,17 @@ const errorVisitor = {
   },
 };
 
+export type NodeLocation = {
+  loc?: {
+    end?: { line: number, column: number },
+    start: { line: number, column: number },
+  },
+  _loc?: {
+    end?: { line: number, column: number },
+    start: { line: number, column: number },
+  },
+};
+
 export default class File {
   _map: Map<any, any> = new Map();
   opts: Object;
@@ -203,6 +214,9 @@ export default class File {
       if (res) return res;
     }
 
+    // make sure that the helper exists
+    helpers.ensure(name);
+
     const uid = (this.declarations[name] = this.scope.generateUidIdentifier(
       name,
     ));
@@ -247,17 +261,12 @@ export default class File {
   }
 
   buildCodeFrameError(
-    node: ?{
+    node: ?NodeLocation,
-      loc?: { start: { line: number, column: number } },
-      _loc?: { start: { line: number, column: number } },
-    },
     msg: string,
     Error: typeof Error = SyntaxError,
   ): Error {
     let loc = node && (node.loc || node._loc);
 
-    msg = `${this.opts.filename}: ${msg}`;
-
     if (!loc && node) {
       const state = {
         loc: null,
@@ -284,6 +293,13 @@ export default class File {
               line: loc.start.line,
               column: loc.start.column + 1,
             },
+            end:
+              loc.end && loc.start.line === loc.end.line
+                ? {
+                    line: loc.end.line,
+                    column: loc.end.column + 1,
+                  }
+                : undefined,
           },
           { highlightCode },
         );

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

@@ -1,7 +1,7 @@
 // @flow
 
 import type { PluginPasses } from "../../config";
-import convertSourceMap, { type SourceMap } from "convert-source-map";
+import convertSourceMap, { typeof SourceMap } from "convert-source-map";
 import generate from "@babel/generator";
 
 import type File from "./file";
@@ -41,7 +41,7 @@ export default function generateCode(
 
     if (typeof result.then === "function") {
       throw new Error(
-        `You appear to be using an async parser plugin, ` +
+        `You appear to be using an async codegen plugin, ` +
           `which your current version of Babel does not support. ` +
           `If you're using a published plugin, ` +
           `you may need to upgrade your @babel/core version.`,

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

@@ -1,6 +1,6 @@
 // @flow
 
-import type { SourceMap } from "convert-source-map";
+import typeof { SourceMap } from "convert-source-map";
 import sourceMap from "source-map";
 
 export default function mergeSourceMap(

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

@@ -1,6 +1,6 @@
 // @flow
 import traverse from "@babel/traverse";
-import type { SourceMap } from "convert-source-map";
+import typeof { SourceMap } from "convert-source-map";
 
 import type { ResolvedConfig, PluginPasses } from "../config";
 
@@ -55,11 +55,29 @@ export function runSync(
     ast,
   );
 
-  transformFile(file, config.passes);
-
   const opts = file.opts;
-  const { outputCode, outputMap } =
+  try {
-    opts.code !== false ? generateCode(config.passes, file) : {};
+    transformFile(file, config.passes);
+  } catch (e) {
+    e.message = `${opts.filename ?? "unknown"}: ${e.message}`;
+    if (!e.code) {
+      e.code = "BABEL_TRANSFORM_ERROR";
+    }
+    throw e;
+  }
+
+  let outputCode, outputMap;
+  try {
+    if (opts.code !== false) {
+      ({ outputCode, outputMap } = generateCode(config.passes, file));
+    }
+  } catch (e) {
+    e.message = `${opts.filename ?? "unknown"}: ${e.message}`;
+    if (!e.code) {
+      e.code = "BABEL_GENERATE_ERROR";
+    }
+    throw e;
+  }
 
   return {
     metadata: file.metadata,

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

@@ -27,49 +27,6 @@ export default function normalizeFile(
 ): File {
   code = `${code || ""}`;
 
-  let inputMap = null;
-  if (options.inputSourceMap !== false) {
-    // If an explicit object is passed in, it overrides the processing of
-    // source maps that may be in the file itself.
-    if (typeof options.inputSourceMap === "object") {
-      inputMap = convertSourceMap.fromObject(options.inputSourceMap);
-    }
-
-    if (!inputMap) {
-      try {
-        inputMap = convertSourceMap.fromSource(code);
-
-        if (inputMap) {
-          code = convertSourceMap.removeComments(code);
-        }
-      } catch (err) {
-        debug("discarding unknown inline input sourcemap", err);
-        code = convertSourceMap.removeComments(code);
-      }
-    }
-
-    if (!inputMap) {
-      if (typeof options.filename === "string") {
-        try {
-          inputMap = convertSourceMap.fromMapFileSource(
-            code,
-            path.dirname(options.filename),
-          );
-
-          if (inputMap) {
-            code = convertSourceMap.removeMapFileComments(code);
-          }
-        } catch (err) {
-          debug("discarding unknown file input sourcemap", err);
-          code = convertSourceMap.removeMapFileComments(code);
-        }
-      } else {
-        debug("discarding un-loadable file input sourcemap");
-        code = convertSourceMap.removeMapFileComments(code);
-      }
-    }
-  }
-
   if (ast) {
     if (ast.type === "Program") {
       ast = t.file(ast, [], []);
@@ -84,6 +41,43 @@ export default function normalizeFile(
     ast = parser(pluginPasses, options, code);
   }
 
+  let inputMap = null;
+  if (options.inputSourceMap !== false) {
+    // If an explicit object is passed in, it overrides the processing of
+    // source maps that may be in the file itself.
+    if (typeof options.inputSourceMap === "object") {
+      inputMap = convertSourceMap.fromObject(options.inputSourceMap);
+    }
+
+    if (!inputMap) {
+      const lastComment = extractComments(INLINE_SOURCEMAP_REGEX, ast);
+      if (lastComment) {
+        try {
+          inputMap = convertSourceMap.fromComment(lastComment);
+        } catch (err) {
+          debug("discarding unknown inline input sourcemap", err);
+        }
+      }
+    }
+
+    if (!inputMap) {
+      const lastComment = extractComments(EXTERNAL_SOURCEMAP_REGEX, ast);
+      if (typeof options.filename === "string" && lastComment) {
+        try {
+          inputMap = convertSourceMap.fromMapFileComment(
+            // fromMapFileComment requires the whole comment block
+            `//${lastComment}`,
+            path.dirname(options.filename),
+          );
+        } catch (err) {
+          debug("discarding unknown file input sourcemap", err);
+        }
+      } else if (lastComment) {
+        debug("discarding un-loadable file input sourcemap");
+      }
+    }
+  }
+
   return new File(options, {
     code,
     ast,
@@ -114,7 +108,7 @@ function parser(
     } else if (results.length === 1) {
       if (typeof results[0].then === "function") {
         throw new Error(
-          `You appear to be using an async codegen plugin, ` +
+          `You appear to be using an async parser plugin, ` +
             `which your current version of Babel does not support. ` +
             `If you're using a published plugin, you may need to upgrade ` +
             `your @babel/core version.`,
@@ -128,6 +122,7 @@ function parser(
       err.message +=
         "\nConsider renaming the file to '.mjs', or setting sourceType:module " +
         "or sourceType:unambiguous in your Babel config for this file.";
+      // err.code will be changed to BABEL_PARSE_ERROR later.
     }
 
     const { loc, missingPlugin } = err;
@@ -156,3 +151,48 @@ function parser(
     throw err;
   }
 }
+
+// These regexps are copied from the convert-source-map package,
+// but without // or /* at the beginning of the comment.
+
+// eslint-disable-next-line max-len
+const INLINE_SOURCEMAP_REGEX = /^[@#]\s+sourceMappingURL=data:(?:application|text)\/json;(?:charset[:=]\S+?;)?base64,(?:.*)$/;
+const EXTERNAL_SOURCEMAP_REGEX = /^[@#][ \t]+sourceMappingURL=(?:[^\s'"`]+?)[ \t]*$/;
+
+function extractCommentsFromList(regex, comments, lastComment) {
+  if (comments) {
+    comments = comments.filter(({ value }) => {
+      if (regex.test(value)) {
+        lastComment = value;
+        return false;
+      }
+      return true;
+    });
+  }
+  return [comments, lastComment];
+}
+
+function extractComments(regex, ast) {
+  let lastComment = null;
+  t.traverseFast(ast, node => {
+    // $FlowIgnore destructuring with expressions is not supported
+    [node.leadingComments, lastComment] = extractCommentsFromList(
+      regex,
+      node.leadingComments,
+      lastComment,
+    );
+    // $FlowIgnore destructuring with expressions is not supported
+    [node.innerComments, lastComment] = extractCommentsFromList(
+      regex,
+      node.innerComments,
+      lastComment,
+    );
+    // $FlowIgnore destructuring with expressions is not supported
+    [node.trailingComments, lastComment] = extractCommentsFromList(
+      regex,
+      node.trailingComments,
+      lastComment,
+    );
+  });
+  return lastComment;
+}

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

@@ -1,6 +1,7 @@
 // @flow
 
 import type File from "./file/file";
+import type NodeLocation from "./file/file";
 
 export default class PluginPass {
   _map: Map<mixed, mixed> = new Map();
@@ -47,14 +48,7 @@ export default class PluginPass {
     return this.file.getModuleName();
   }
 
-  buildCodeFrameError(
+  buildCodeFrameError(node: ?NodeLocation, msg: string, Error?: typeof Error) {
-    node: ?{
-      loc?: { start: { line: number, column: number } },
-      _loc?: { start: { line: number, column: number } },
-    },
-    msg: string,
-    Error?: typeof Error,
-  ) {
     return this.file.buildCodeFrameError(node, msg, Error);
   }
 }

packages/babel-core/test/api.js

@@ -788,4 +788,28 @@ describe("api", function() {
       );
     });
   });
+
+  describe("missing helpers", function() {
+    it("should always throw", function() {
+      expect(() =>
+        babel.transformSync(``, {
+          configFile: false,
+          plugins: [
+            function() {
+              return {
+                visitor: {
+                  Program(path) {
+                    try {
+                      path.pushContainer("body", this.addHelper("fooBar"));
+                    } catch {}
+                    path.pushContainer("body", this.addHelper("fooBar"));
+                  },
+                },
+              };
+            },
+          ],
+        }),
+      ).toThrow();
+    });
+  });
 });

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

@@ -1,7 +1,44 @@
 import fs from "fs";
+import os from "os";
 import path from "path";
+import escapeRegExp from "lodash/escapeRegExp";
 import { loadOptions as loadOptionsOrig } from "../lib";
 
+// TODO: In Babel 8, we can directly uses fs.promises which is supported by
+// node 8+
+const pfs =
+  fs.promises ??
+  new Proxy(fs, {
+    get(target, name) {
+      if (name === "copyFile") {
+        // fs.copyFile is only supported since node 8.5
+        // https://stackoverflow.com/a/30405105/2359289
+        return function copyFile(source, target) {
+          const rd = fs.createReadStream(source);
+          const wr = fs.createWriteStream(target);
+          return new Promise(function(resolve, reject) {
+            rd.on("error", reject);
+            wr.on("error", reject);
+            wr.on("finish", resolve);
+            rd.pipe(wr);
+          }).catch(function(error) {
+            rd.destroy();
+            wr.end();
+            throw error;
+          });
+        };
+      }
+
+      return (...args) =>
+        new Promise((resolve, reject) =>
+          target[name](...args, (error, result) => {
+            if (error) reject(error);
+            else resolve(result);
+          }),
+        );
+    },
+  });
+
 function fixture(...args) {
   return path.join(__dirname, "fixtures", "config", ...args);
 }
@@ -13,6 +50,24 @@ function loadOptions(opts) {
   });
 }
 
+function pairs(items) {
+  const pairs = [];
+  for (let i = 0; i < items.length - 1; i++) {
+    for (let j = i + 1; j < items.length; j++) {
+      pairs.push([items[i], items[j]]);
+    }
+  }
+  return pairs;
+}
+
+async function getTemp(name) {
+  const cwd = await pfs.mkdtemp(os.tmpdir() + path.sep + name);
+  const tmp = name => path.join(cwd, name);
+  const config = name =>
+    pfs.copyFile(fixture("config-files-templates", name), tmp(name));
+  return { cwd, tmp, config };
+}
+
 describe("buildConfigChain", function() {
   describe("test", () => {
     describe("single", () => {
@@ -33,7 +88,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          test: new RegExp(fixture("nonexistant-fake")),
+          test: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
           comments: true,
         });
 
@@ -69,7 +124,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          test: new RegExp(fixture("nonexistant-unknown")),
+          test: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
           comments: true,
         });
 
@@ -107,7 +162,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          test: [new RegExp(fixture("nonexistant-fake"))],
+          test: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
           comments: true,
         });
 
@@ -143,7 +198,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          test: [new RegExp(fixture("nonexistant-unknown"))],
+          test: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
           comments: true,
         });
 
@@ -183,7 +238,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          include: new RegExp(fixture("nonexistant-fake")),
+          include: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
           comments: true,
         });
 
@@ -219,7 +274,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          include: new RegExp(fixture("nonexistant-unknown")),
+          include: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
           comments: true,
         });
 
@@ -257,7 +312,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          include: [new RegExp(fixture("nonexistant-fake"))],
+          include: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
           comments: true,
         });
 
@@ -293,7 +348,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          include: [new RegExp(fixture("nonexistant-unknown"))],
+          include: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
           comments: true,
         });
 
@@ -333,7 +388,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          exclude: new RegExp(fixture("nonexistant-fake")),
+          exclude: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
           comments: true,
         });
 
@@ -369,7 +424,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          exclude: new RegExp(fixture("nonexistant-unknown")),
+          exclude: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
           comments: true,
         });
 
@@ -407,7 +462,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          exclude: [new RegExp(fixture("nonexistant-fake"))],
+          exclude: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
           comments: true,
         });
 
@@ -443,7 +498,7 @@ describe("buildConfigChain", function() {
           cwd: fixture("nonexistant-fake"),
           filename: fixture("nonexistant-fake", "src.js"),
           babelrc: false,
-          exclude: [new RegExp(fixture("nonexistant-unknown"))],
+          exclude: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
           comments: true,
         });
 
@@ -943,111 +998,142 @@ describe("buildConfigChain", function() {
       }
     });
 
-    it("should load .babelrc", () => {
+    describe("root", () => {
-      const filename = fixture("config-files", "babelrc", "src.js");
+      test.each(["babel.config.json", "babel.config.js", "babel.config.cjs"])(
+        "should load %s",
+        async name => {
+          const { cwd, tmp, config } = await getTemp(
+            `babel-test-load-config-${name}`,
+          );
+          const filename = tmp("src.js");
 
-      expect(
+          await config(name);
-        loadOptions({
+
-          filename,
+          expect(
+            loadOptions({
+              filename,
+              cwd,
+            }),
+          ).toEqual({
+            ...getDefaults(),
+            filename,
+            cwd,
+            root: cwd,
+            comments: true,
+          });
+        },
+      );
+
+      test.each(
+        pairs(["babel.config.json", "babel.config.js", "babel.config.cjs"]),
+      )("should throw if both %s and %s are used", async (name1, name2) => {
+        const { cwd, tmp, config } = await getTemp(
+          `babel-test-dup-config-${name1}-${name2}`,
+        );
+
+        await Promise.all([config(name1), config(name2)]);
+
+        expect(() => loadOptions({ filename: tmp("src.js"), cwd })).toThrow(
+          /Multiple configuration files found/,
+        );
+      });
+    });
+
+    describe("relative", () => {
+      test.each(["package.json", ".babelrc", ".babelrc.js", ".babelrc.cjs"])(
+        "should load %s",
+        async name => {
+          const { cwd, tmp, config } = await getTemp(
+            `babel-test-load-config-${name}`,
+          );
+          const filename = tmp("src.js");
+
+          await config(name);
+
+          expect(
+            loadOptions({
+              filename,
+              cwd,
+            }),
+          ).toEqual({
+            ...getDefaults(),
+            filename,
+            cwd,
+            root: cwd,
+            comments: true,
+          });
+        },
+      );
+
+      it("should load .babelignore", () => {
+        const filename = fixture("config-files", "babelignore", "src.js");
+
+        expect(
+          loadOptions({ filename, cwd: path.dirname(filename) }),
+        ).toBeNull();
+      });
+
+      test.each(
+        pairs(["package.json", ".babelrc", ".babelrc.js", ".babelrc.cjs"]),
+      )("should throw if both %s and %s are used", async (name1, name2) => {
+        const { cwd, tmp, config } = await getTemp(
+          `babel-test-dup-config-${name1}-${name2}`,
+        );
+
+        await Promise.all([config(name1), config(name2)]);
+
+        expect(() => loadOptions({ filename: tmp("src.js"), cwd })).toThrow(
+          /Multiple configuration files found/,
+        );
+      });
+
+      it("should ignore package.json without a 'babel' property", () => {
+        const filename = fixture("config-files", "pkg-ignored", "src.js");
+
+        expect(loadOptions({ filename, cwd: path.dirname(filename) })).toEqual({
+          ...getDefaults(),
+          filename: filename,
           cwd: path.dirname(filename),
-        }),
+          root: path.dirname(filename),
-      ).toEqual({
+          comments: true,
-        ...getDefaults(),
+        });
-        filename: filename,
+      });
-        cwd: path.dirname(filename),
+
-        root: path.dirname(filename),
+      test.each`
-        comments: true,
+        config            | dir                    | error
+        ${".babelrc"}     | ${"babelrc-error"}     | ${/Error while parsing config - /}
+        ${".babelrc.js"}  | ${"babelrc-js-error"}  | ${/Babelrc threw an error/}
+        ${".babelrc.cjs"} | ${"babelrc-cjs-error"} | ${/Babelrc threw an error/}
+        ${"package.json"} | ${"pkg-error"}         | ${/Error while parsing JSON - /}
+      `("should show helpful errors for $config", ({ dir, error }) => {
+        const filename = fixture("config-files", dir, "src.js");
+
+        expect(() =>
+          loadOptions({ filename, cwd: path.dirname(filename) }),
+        ).toThrow(error);
       });
     });
 
-    it("should load .babelrc.js", () => {
+    it("should throw when `test` presents but `filename` is not passed", () => {
-      const filename = fixture("config-files", "babelrc-js", "src.js");
+      expect(() => loadOptions({ test: /\.ts$/, plugins: [] })).toThrow(
-
+        /Configuration contains string\/RegExp pattern/,
-      expect(loadOptions({ filename, cwd: path.dirname(filename) })).toEqual({
+      );
-        ...getDefaults(),
-        filename: filename,
-        cwd: path.dirname(filename),
-        root: path.dirname(filename),
-        comments: true,
-      });
     });
 
-    it("should load package.json#babel", () => {
+    it("should throw when `preset` requires `filename` but it was not passed", () => {
-      const filename = fixture("config-files", "pkg", "src.js");
+      expect(() => {
-
+        loadOptions({
-      expect(loadOptions({ filename, cwd: path.dirname(filename) })).toEqual({
+          presets: [require("./fixtures/config-loading/preset4")],
-        ...getDefaults(),
+        });
-        filename: filename,
+      }).toThrow(/Preset \/\* your preset \*\/ requires a filename/);
-        cwd: path.dirname(filename),
-        root: path.dirname(filename),
-        comments: true,
-      });
     });
 
-    it("should load .babelignore", () => {
+    it("should throw when `preset.overrides` requires `filename` but it was not passed", () => {
-      const filename = fixture("config-files", "babelignore", "src.js");
+      expect(() => {
-
+        loadOptions({
-      expect(loadOptions({ filename, cwd: path.dirname(filename) })).toBeNull();
+          presets: [require("./fixtures/config-loading/preset5")],
-    });
+        });
-
+      }).toThrow(/Preset \/\* your preset \*\/ requires a filename/);
-    it("should throw if there are both .babelrc and .babelrc.js", () => {
-      const filename = fixture("config-files", "both-babelrc", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Multiple configuration files found/);
-    });
-
-    it("should throw if there are both .babelrc and package.json", () => {
-      const filename = fixture("config-files", "pkg-babelrc", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Multiple configuration files found/);
-    });
-
-    it("should throw if there are both .babelrc.js and package.json", () => {
-      const filename = fixture("config-files", "pkg-babelrc-js", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Multiple configuration files found/);
-    });
-
-    it("should ignore package.json without a 'babel' property", () => {
-      const filename = fixture("config-files", "pkg-ignored", "src.js");
-
-      expect(loadOptions({ filename, cwd: path.dirname(filename) })).toEqual({
-        ...getDefaults(),
-        filename: filename,
-        cwd: path.dirname(filename),
-        root: path.dirname(filename),
-        comments: true,
-      });
-    });
-
-    it("should show helpful errors for .babelrc", () => {
-      const filename = fixture("config-files", "babelrc-error", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Error while parsing config - /);
-    });
-
-    it("should show helpful errors for .babelrc.js", () => {
-      const filename = fixture("config-files", "babelrc-js-error", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Babelrc threw an error/);
-    });
-
-    it("should show helpful errors for package.json", () => {
-      const filename = fixture("config-files", "pkg-error", "src.js");
-
-      expect(() =>
-        loadOptions({ filename, cwd: path.dirname(filename) }),
-      ).toThrow(/Error while parsing JSON - /);
     });
   });
 });

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

@@ -322,6 +322,21 @@ describe("@babel/core config loading", () => {
         }
       }
     });
+
+    it("should thrown when plugin is not valid", () => {
+      const fooPlugin = {
+        inherits: "inhertis-should-not-be-string",
+      };
+      const opts = {
+        cwd: path.dirname(FILEPATH),
+        filename: FILEPATH,
+        plugins: [fooPlugin],
+      };
+
+      expect(() => loadConfig(opts)).toThrow(
+        /\.inherits must be a function, or undefined/,
+      );
+    });
   });
 
   describe("caller metadata", () => {

packages/babel-core/test/fixtures/config-loading/preset4.js

@@ -0,0 +1,6 @@
+module.exports = function() {
+  return {
+    test: /\.ts$/,
+    plugins: []
+  }
+};

packages/babel-core/test/fixtures/config-loading/preset5.js

@@ -0,0 +1,8 @@
+module.exports = function() {
+  return {
+    overrides: [{
+      test: /\.ts$/,
+      plugins: []
+    }]
+  }
+};

packages/babel-core/test/fixtures/config/config-files-templates/.babelrc

@@ -0,0 +1,3 @@
+{
+  "comments": true
+}

packages/babel-core/test/fixtures/config/config-files-templates/.babelrc.cjs

@@ -0,0 +1,3 @@
+module.exports = {
+  comments: true
+};

packages/babel-core/test/fixtures/config/config-files-templates/.babelrc.js

@@ -0,0 +1,3 @@
+module.exports = {
+  comments: true
+};

packages/babel-core/test/fixtures/config/config-files-templates/babel.config.cjs

@@ -0,0 +1,3 @@
+module.exports = {
+  comments: true
+};

packages/babel-core/test/fixtures/config/config-files-templates/babel.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  comments: true
+};

packages/babel-core/test/fixtures/config/config-files-templates/babel.config.json

@@ -0,0 +1,3 @@
+{
+  "comments": true
+}

packages/babel-core/test/fixtures/config/config-files/babelrc-cjs-error/.babelrc.cjs

@@ -0,0 +1,3 @@
+module.exports = function() {
+  throw new Error("Babelrc threw an error");
+};

packages/babel-core/test/fixtures/config/config-files/babelrc-js/.babelrc.js

@@ -1,3 +0,0 @@
-module.exports = {
-  comments: true,
-};

packages/babel-core/test/fixtures/config/config-files/babelrc/.babelrc

@@ -1,3 +0,0 @@
-{
-  comments: true,
-}

packages/babel-core/test/fixtures/config/config-files/both-babelrc/.babelrc

@@ -1 +0,0 @@
-{}

packages/babel-core/test/fixtures/config/config-files/both-babelrc/.babelrc.js

@@ -1 +0,0 @@
-module.exports = {};

packages/babel-core/test/fixtures/config/config-files/pkg-babelrc-js/.babelrc.js

@@ -1 +0,0 @@
-module.exports = {};

packages/babel-core/test/fixtures/config/config-files/pkg-babelrc-js/package.json

@@ -1,3 +0,0 @@
-{
-  "babel": {}
-}

packages/babel-core/test/fixtures/config/config-files/pkg-babelrc/.babelrc

@@ -1 +0,0 @@
-{}

packages/babel-core/test/fixtures/config/config-files/pkg-babelrc/package.json

@@ -1,3 +0,0 @@
-{
-  "babel": {}
-}

packages/babel-core/test/fixtures/parse/output.json

@@ -2,6 +2,7 @@
   "type": "File",
   "start": 0,
   "end": 91,
+  "errors": [],
   "loc": {
     "start": {
       "line": 1,

packages/babel-core/test/fixtures/plugins/build-code-frame-error/exec.js

@@ -1,16 +1,18 @@
-var code = "function f() {}";
+expect(() => {
-transform(code, {
+  var code = "function f() {}";
-  plugins: [
+  transform(code, {
-    function() {
+    plugins: [
-      return {
+      function() {
-        visitor: {
+        return {
-          FunctionDeclaration: function(path) {
+          visitor: {
-            throw path.buildCodeFrameError("someMsg");
+            FunctionDeclaration: function(path) {
+              throw path.buildCodeFrameError("someMsg");
+            },
           },
-        },
+        };
-      };
+      },
-    },
+    ],
-  ],
+    // hard to assert on ANSI escape codes
-  // hard to assert on ANSI escape codes
+    highlightCode: false,
-  highlightCode: false,
+  });
-});
+}).toThrow(/^unknown: someMsg\s+> 1 \| function f\(\) {}/);

packages/babel-core/test/fixtures/plugins/build-code-frame-error/options.json

@@ -1,3 +0,0 @@
-{
-  "throws": "undefined: someMsg\n> 1 | function f() {}"
-}

packages/babel-core/test/fixtures/plugins/transform-error/exec.js

@@ -0,0 +1,15 @@
+var code = "function f() {}";
+transform(code, {
+  plugins: [
+    function() {
+      return {
+        visitor: {
+          FunctionDeclaration: function(path) {
+            throw new Error("someMsg");
+          },
+        },
+      };
+    },
+  ],
+  filename: "/fake/path/example.js"
+});

packages/babel-core/test/fixtures/plugins/transform-error/options.json

@@ -0,0 +1,4 @@
+{
+  "throws": "/fake/path/example.js: someMsg",
+  "os": ["linux", "darwin"]
+}

packages/babel-core/test/fixtures/transformation/source-maps/comment-inside-string/input.js

@@ -0,0 +1,8 @@
+// https://github.com/babel/babel/issues/9790
+const comment = `//# sourceMappingURL=${path.basename(
+  sourceMapFilename
+)}`
+
+// https://github.com/babel/babel/issues/9956
+this.shadowRoot.innerHTML = `<style>div{display:block}
+/*# sourceMappingURL=data:application/json;charset=utf-8;base64,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 */</style>`;

packages/babel-core/test/fixtures/transformation/source-maps/comment-inside-string/options.json

@@ -0,0 +1,3 @@
+{
+  "inputSourceMap": true
+}

packages/babel-core/test/fixtures/transformation/source-maps/comment-inside-string/output.js

@@ -0,0 +1,5 @@
+// https://github.com/babel/babel/issues/9790
+const comment = `//# sourceMappingURL=${path.basename(sourceMapFilename)}`; // https://github.com/babel/babel/issues/9956
+
+this.shadowRoot.innerHTML = `<style>div{display:block}
+/*# sourceMappingURL=data:application/json;charset=utf-8;base64,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 */</style>`;

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

@@ -0,0 +1,5 @@
+var foo = function () {
+  return 4;
+};
+
+//# sourceMappingURL=input.js.map