refactor: use TypeScript and update to @babel 7

.github/workflows/rollingversions-canary.yml

@@ -0,0 +1,40 @@
+name: Publish Canary
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn install --frozen-lockfile
+      - run: yarn prettier:check
+      - run: yarn test
+
+  publish-canary:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+          registry-url: 'https://registry.npmjs.org'
+      - run: yarn install --frozen-lockfile
+      - run: yarn build
+      - run: npx rollingversions publish --canary $GITHUB_RUN_NUMBER
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/rollingversions.yml

@@ -0,0 +1,38 @@
+name: Release
+on:
+  repository_dispatch:
+    types: [rollingversions_publish_approved]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn install --frozen-lockfile
+      - run: yarn prettier:check
+      - run: yarn test
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+          registry-url: 'https://registry.npmjs.org'
+      - run: yarn install --frozen-lockfile
+      - run: yarn build
+      - run: npx rollingversions publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/test.yml

@@ -0,0 +1,24 @@
+name: Test
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn install --frozen-lockfile
+      - run: yarn prettier:check
+      - run: yarn test

README.md

@@ -2,9 +2,9 @@
 
 Compile time `with` for strict mode JavaScript
 
-[![build status](https://img.shields.io/travis/pugjs/with.svg)](http://travis-ci.org/pugjs/with)
-[![Dependency Status](https://img.shields.io/david/pugjs/with.svg)](https://david-dm.org/pugjs/with)
-[![NPM version](https://img.shields.io/npm/v/with.svg)](https://www.npmjs.com/package/with)
+[![Build Status](https://img.shields.io/github/workflow/status/pugjs/with/Publish%20Canary/master?style=for-the-badge)](https://github.com/pugjs/with/actions?query=workflow%3A%22Publish+Canary%22)
+[![Rolling Versions](https://img.shields.io/badge/Rolling%20Versions-Enabled-brightgreen?style=for-the-badge)](https://rollingversions.com/pugjs/with)
+[![NPM version](https://img.shields.io/npm/v/with?style=for-the-badge)](https://www.npmjs.com/package/with)
 
 ## Installation
 
@@ -13,17 +13,17 @@ Compile time `with` for strict mode JavaScript
 ## Usage
 
 ```js
-var addWith = require('with')
+var addWith = require('with');
 
-addWith('obj', 'console.log(a)')
+addWith('obj', 'console.log(a)');
 // => ';(function (console, a) {
 //       console.log(a)
 //     }("console" in obj ? obj.console :
 //                          typeof console!=="undefined" ? console : undefined,
 //       "a" in obj ? obj.a :
 //                    typeof a !== "undefined" ? a : undefined));'
 
-addWith('obj', 'console.log(a)', ['console'])
+addWith('obj', 'console.log(a)', ['console']);
 // => ';(function (console, a) {
 //       console.log(a)
 //     }("a" in obj ? obj.a :
@@ -38,26 +38,26 @@ The idea is that this is roughly equivallent to:
 
 ```js
 with (obj) {
-  src
+  src;
 }
 ```
 
-There are a few differences though.  For starters, assignments to variables will always remain contained within the with block.
+There are a few differences though. For starters, assignments to variables will always remain contained within the with block.
 
 e.g.
 
 ```js
-var foo = 'foo'
+var foo = 'foo';
 with ({}) {
-  foo = 'bar'
+  foo = 'bar';
 }
-assert(foo === 'bar')// => This fails for compile time with but passes for native with
+assert(foo === 'bar'); // => This fails for compile time with but passes for native with
 
-var obj = {foo: 'foo'}
+var obj = {foo: 'foo'};
 with ({}) {
-  foo = 'bar'
+  foo = 'bar';
 }
-assert(obj.foo === 'bar')// => This fails for compile time with but passes for native with
+assert(obj.foo === 'bar'); // => This fails for compile time with but passes for native with
 ```
 
 It also makes everything be declared, so you can always do:
@@ -72,16 +72,16 @@ instead of
 if (typeof foo === 'undefined')
 ```
 
-This is not the case if foo is in `exclude`.  If a variable is excluded, we ignore it entirely.  This is useful if you know a variable will be global as it can lead to efficiency improvements.
+This is not the case if foo is in `exclude`. If a variable is excluded, we ignore it entirely. This is useful if you know a variable will be global as it can lead to efficiency improvements.
 
 It is also safe to use in strict mode (unlike `with`) and it minifies properly (`with` disables virtually all minification).
 
 #### Parsing Errors
 
-with internally uses babylon to parse code passed to `addWith`.  If babylon throws an error, probably due to a syntax error, `addWith` returns an error wrapping the babylon error, so you can
-retrieve location information.  `error.component` is `"src"` if the error is in the body or `"obj"` if it's in the object part of the with expression.  `error.babylonError` is
+with internally uses babylon to parse code passed to `addWith`. If babylon throws an error, probably due to a syntax error, `addWith` returns an error wrapping the babylon error, so you can
+retrieve location information. `error.component` is `"src"` if the error is in the body or `"obj"` if it's in the object part of the with expression. `error.babylonError` is
 the error thrown from babylon.
 
 ## License
 
-  MIT
+MIT

package.json

@@ -4,8 +4,13 @@
   "description": "Compile time `with` for strict mode JavaScript",
   "main": "lib/index.js",
   "scripts": {
-    "prepublish": "babel -d lib src",
-    "test": "babel-node node_modules/mocha/bin/_mocha test/index.js -R spec"
+    "build": "tsc",
+    "postbuild": "rimraf lib/**/__tests__",
+    "lint": "tslint './src/**/*.{ts,tsx}' -t verbose -p .",
+    "prettier:write": "prettier --ignore-path .gitignore --write './**/*.{md,json,yaml,js,jsx,ts,tsx}'",
+    "prettier:check": "prettier --ignore-path .gitignore --list-different './**/*.{md,json,yaml,js,jsx,ts,tsx}'",
+    "pretest": "yarn build",
+    "test": "mocha test/index.js -R spec"
   },
   "repository": {
     "type": "git",
@@ -14,17 +19,22 @@
   "author": "ForbesLindesay",
   "license": "MIT",
   "dependencies": {
-    "babel-runtime": "^6.11.6",
-    "babel-types": "^6.15.0",
-    "babylon": "^6.9.1",
-    "babylon-walk": "^1.0.2"
+    "@babel/parser": "^7.9.6",
+    "@babel/types": "^7.9.6",
+    "assert-never": "^1.2.1",
+    "babel-walk": "3.0.0-canary-5"
   },
   "devDependencies": {
-    "babel-cli": "^6.14.0",
-    "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-preset-es2015": "^6.14.0",
+    "@forbeslindesay/tsconfig": "^2.0.0",
+    "@types/node": "^14.0.5",
     "mocha": "*",
+    "prettier": "^2.0.5",
+    "rimraf": "^3.0.2",
+    "tslint": "^6.1.2",
+    "typescript": "^3.9.3",
     "uglify-js": "^2.6.2"
+  },
+  "engines": {
+    "node": ">= 10.0.0"
   }
-}
+}

prettier.config.js

@@ -0,0 +1 @@
+module.exports = require('@forbeslindesay/tsconfig/prettier');