chore: switch to GitHub Actions (#194)

No change to logic. This switches to GitHub Actions based on
shelljs/shelljs#1055.

.gitattributes

@@ -0,0 +1 @@
+* text eol=lf

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+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
+      - run: npm run check-node-support
+      - uses: codecov/codecov-action@v2
+        with:
+          fail_ci_if_error: true

README.md

@@ -1,7 +1,6 @@
 # Shx
 
-[![Travis](https://img.shields.io/travis/shelljs/shx/master.svg?style=flat-square&label=unix)](https://travis-ci.org/shelljs/shx)
-[![AppVeyor](https://img.shields.io/appveyor/ci/shelljs/shx/master.svg?style=flat-square&label=windows)](https://ci.appveyor.com/project/shelljs/shx/branch/master)
+[![Build Status](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fshelljs%2Fshx%2Fbadge%3Fref%3Dmaster&style=flat-square)](https://actions-badge.atrox.dev/shelljs/shx/goto?ref=master)
 [![Codecov](https://img.shields.io/codecov/c/github/shelljs/shx/master.svg?style=flat-square&label=coverage)](https://codecov.io/gh/shelljs/shx)
 [![npm version](https://img.shields.io/npm/v/shx.svg?style=flat-square)](https://www.npmjs.com/package/shx)
 [![npm downloads](https://img.shields.io/npm/dm/shx.svg?style=flat-square)](https://www.npmjs.com/package/shx)

scripts/check-node-support.js

@@ -50,19 +50,11 @@ 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(num => ({ 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 {
@@ -71,13 +63,11 @@ try {
   var pack = require('../package.json');
   checkEngines(MIN_NODE_VERSION, pack);
 
-  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) {