chore: set up GitHub Actions CI (#1055)

.github/workflows/main.yml

@@ -0,0 +1,39 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 8
+          - 9
+          - 10
+          - 11
+          - 12
+          - 13
+          - 14
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm run test-with-coverage
+      - run: npm run lint
+      - run: npm run gendocs
+      - run: npm run check-node-support
+      - name: Check for modified files (skip on Windows)
+        run: npm run after-travis
+        if: matrix.os != 'windows-latest'
+      - uses: codecov/codecov-action@v2
+        with:
+          fail_ci_if_error: true

CONTRIBUTING.md

@@ -15,9 +15,8 @@ stable). If you've found a bug, please follow these steps:
 PRs are welcome! However, we ask that you follow a few guidelines:
 
  - Please add tests for all changes/new features.
- - Make sure your code passes `npm test`. Please check the CI (both Appveyor and
-   Travis). If you can't figure out why something doesn't work, feel free to ask
-   for help.
+ - Make sure your code passes `npm test`. Please check the CI. If you can't
+   figure out why something doesn't work, feel free to ask for help.
  - Make sure you conform to our style guidelines. You can run `npm run lint` to
    check style, and `npm run lint -- --fix` to automatically fix some issues.
  - Make documentation changes *within the source files*, not in the README.

README.md

@@ -1,7 +1,6 @@
 # ShellJS - Unix shell commands for Node.js
 
-[![Travis](https://img.shields.io/travis/shelljs/shelljs/master.svg?style=flat-square&label=unix)](https://travis-ci.org/shelljs/shelljs)
-[![AppVeyor](https://img.shields.io/appveyor/ci/shelljs/shelljs/master.svg?style=flat-square&label=windows)](https://ci.appveyor.com/project/shelljs/shelljs/branch/master)
+[![Build Status](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fshelljs%2Fshelljs%2Fbadge%3Fref%3Dmaster&style=flat-square)](https://actions-badge.atrox.dev/shelljs/shelljs/goto?ref=master)
 [![Codecov](https://img.shields.io/codecov/c/github/shelljs/shelljs/master.svg?style=flat-square&label=coverage)](https://codecov.io/gh/shelljs/shelljs)
 [![npm version](https://img.shields.io/npm/v/shelljs.svg?style=flat-square)](https://www.npmjs.com/package/shelljs)
 [![npm downloads](https://img.shields.io/npm/dm/shelljs.svg?style=flat-square)](https://www.npmjs.com/package/shelljs)
@@ -14,7 +13,7 @@ projects - say goodbye to those gnarly Bash scripts!
 
 ShellJS is proudly tested on every node release since <!-- start minVersion -->`v8`<!-- stop minVersion -->!
 
-The project is [unit-tested](http://travis-ci.org/shelljs/shelljs) and battle-tested in projects like:
+The project is unit-tested and battle-tested in projects like:
 
 + [Firebug](http://getfirebug.com/) - Firefox's infamous debugger
 + [JSHint](http://jshint.com) & [ESLint](http://eslint.org/) - popular JavaScript linters

scripts/check-node-support.js

@@ -51,21 +51,11 @@ function range(start, stop) {
   return ret;
 }
 
-function checkTravis(minNodeVersion, maxNodeVersion, travisYaml) {
-  var expectedTravisVersions = range(minNodeVersion, maxNodeVersion);
-  var msg = 'Check Travis node_js versions';
-  assertDeepEquals(travisYaml.node_js, expectedTravisVersions, msg);
-}
-
-function checkAppveyor(minNodeVersion, maxNodeVersion, appveyorYaml) {
-  var expectedAppveyorVersions = range(minNodeVersion, maxNodeVersion)
-      .map(function (num) {
-        return { nodejs_version: num.toString() };
-      })
-      .reverse(); // Arbitrarily, we store appveyor in reverse order.
-  var msg = 'Check Appveyor environment.matrix versions';
-  assertDeepEquals(appveyorYaml.environment.matrix, expectedAppveyorVersions,
-      msg);
+function checkGithubActions(minNodeVersion, maxNodeVersion, githubActionsYaml) {
+  var expectedVersions = range(minNodeVersion, maxNodeVersion);
+  var msg = 'Check GitHub Actions node_js versions';
+  assertDeepEquals(githubActionsYaml.jobs.test.strategy.matrix['node-version'],
+      expectedVersions, msg);
 }
 
 try {
@@ -74,13 +64,11 @@ try {
   var package = require('../package.json');
   checkEngines(MIN_NODE_VERSION, package);
 
-  var travisFileName = path.join(__dirname, '..', '.travis.yml');
-  var travisYaml = yaml.safeLoad(shell.cat(travisFileName));
-  checkTravis(MIN_NODE_VERSION, MAX_NODE_VERSION, travisYaml);
+  var githubActionsFileName = path.join(__dirname, '..', '.github', 'workflows',
+      'main.yml');
+  var githubActionsYaml = yaml.safeLoad(shell.cat(githubActionsFileName));
+  checkGithubActions(MIN_NODE_VERSION, MAX_NODE_VERSION, githubActionsYaml);
 
-  var appveyorFileName = path.join(__dirname, '..', 'appveyor.yml');
-  var appveyorYaml = yaml.safeLoad(shell.cat(appveyorFileName));
-  checkAppveyor(MIN_NODE_VERSION, MAX_NODE_VERSION, appveyorYaml);
   console.log('All files look good (this project supports v'
       + MIN_NODE_VERSION + '-v' + MAX_NODE_VERSION + ')!');
 } catch (e) {