Support Babel 8, setup GH actions

.github/workflows/test.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  test:
+    name: Node.js ${{ matrix.node }} / Babel ${{ matrix.babel }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [6, 22, 24, 26]
+        babel: [7, 8]
+        exclude:
+          # Babel 8 requires Node.js 20+, so it cannot run on Node.js 6.
+          - node: 6
+            babel: 8
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js ${{ matrix.node }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install dependencies (Babel 7)
+        # --ignore-engines: dev-only tools such as eslint declare a newer
+        # minimum Node.js version, but they are not executed in this job
+        # (linting runs in its own job), so installing them on Node.js 6 is fine.
+        run: yarn install --frozen-lockfile --ignore-engines
+
+      - name: Upgrade dev dependencies to Babel 8
+        if: matrix.babel == 8
+        run: >-
+          yarn add --dev
+          @babel/core@^8.0.0
+          @babel/preset-env@^8.0.0
+
+      - name: Run tests
+        run: yarn test
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 26
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Lint
+        run: yarn lint

Gruntfile.js

@@ -5,7 +5,10 @@ module.exports = function(grunt) {
       compile: {
         options: {
           sourceMap: true,
-          presets: ["@babel/preset-env"],
+          // Target an old environment so that the test fixture is actually
+          // transpiled (e.g. classes -> functions) regardless of the default
+          // targets, which differ between Babel 7 and Babel 8.
+          presets: [["@babel/preset-env", { targets: { ie: "11" } }]],
         },
         files: {
           "test/tmp/fixture-compiled.js": "test/fixtures/fixture.js",

README.md

@@ -1,7 +1,7 @@
-> This readme is for grunt-babel v8 + Babel v7
+> This readme is for grunt-babel v8 + Babel v7 or v8
 > Check the [7.x branch](https://github.com/babel/grunt-babel/tree/7.x) for docs with Babel v6
 
-# grunt-babel [![Build Status](https://travis-ci.org/babel/grunt-babel.svg?branch=master)](https://travis-ci.org/babel/grunt-babel)
+# grunt-babel [![CI](https://github.com/babel/grunt-babel/actions/workflows/test.yml/badge.svg)](https://github.com/babel/grunt-babel/actions/workflows/test.yml)
 
 > Use next generation JavaScript, today, with [Babel](https://babeljs.io)
 

package.json

@@ -15,7 +15,7 @@
   "scripts": {
     "lint": "eslint .",
     "format": "eslint . --fix",
-    "test": "yarn lint && grunt"
+    "test": "grunt"
   },
   "files": [
     "tasks"
@@ -34,7 +34,7 @@
     "compiler"
   ],
   "peerDependencies": {
-    "@babel/core": "^7.0.0",
+    "@babel/core": "^7.0.0 || ^8.0.0",
     "grunt": ">=0.4.0"
   },
   "devDependencies": {

tasks/babel.js

@@ -7,7 +7,7 @@ try {
 } catch (err) {
   if (err.code === "MODULE_NOT_FOUND") {
     err.message +=
-      "\n grunt-babel@8 requires Babel 7.x (the package '@babel/core'). " +
+      "\n grunt-babel@8 requires Babel 7.x or 8.x (the package '@babel/core'). " +
       "If you'd like to use Babel 6.x ('babel-core'), you should install 'grunt-babel@7'.";
   }
   throw err;