Run lint on CI (#550)

* Check for lint issues on CI

* Check if generated files are up-to-date on CI

* Fix step name

* Check code formatting on CI

* Fix eslint config

.github/workflows/bundlers.yml

@@ -40,5 +40,5 @@ jobs:
         run: npm install
       - name: Bundle code
         run: npm run test:prepare ${{ matrix.bundler }}
-      - name: Run Tests on Browsers
+      - name: Run Tests on bundler
         run: npm run test:bundlers ${{ matrix.bundler }}

.github/workflows/lint.yml

@@ -0,0 +1,40 @@
+name: Lint
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: Node.js
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [20.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Restore cached dependencies
+        uses: actions/cache@v3
+        with:
+          path: node_modules
+          key: node-modules-${{ hashFiles('package.json') }}
+      - name: Install dependencies
+        run: npm install
+      - name: Build
+        run: npm run build
+      - name: Check generated files
+        run: |
+          # Check if diff is empty
+          git diff --exit-code --stat ${{ github.sha }} -- lib/
+      - name: Check format
+        run: npm run test:format
+      - name: Check for lint issues
+        run: npm run lint

eslint.config.mjs

@@ -1,18 +1,18 @@
 import { FlatCompat } from '@eslint/eslintrc'
-const compat = new FlatCompat()
-
 import eslintPluginLocal from './eslint-plugin-local/index.mjs'
 
+const compat = new FlatCompat()
+
 export default [
   // standard,
   ...compat.extends('eslint-config-standard'),
   {
     files: ['**/**.js', '**/**.mjs'],
     languageOptions: {
       sourceType: 'module',
-      ecmaVersion: 'latest',
+      ecmaVersion: 'latest'
     },
-    plugins: { 'local': eslintPluginLocal },
+    plugins: { local: eslintPluginLocal },
     rules: {
       /*
         This is inserted to make this compatible with prettier.
@@ -21,7 +21,7 @@ export default [
       'space-before-function-paren': 0,
       curly: [2, 'all'],
       'local/no-big-int': 'error',
-      'no-undef': 'warn',
-    },
-  },
+      'no-undef': 'warn'
+    }
+  }
 ]

package.json

@@ -42,6 +42,7 @@
     "test:readable-stream-only": "node readable-stream-test/runner-prepare.mjs",
     "coverage": "c8 -c ./c8.json tap --rcfile=./tap.yml test/parallel/test-*.js test/ours/test-*.js",
     "format": "prettier -w src lib test",
+    "test:format": "prettier -c src lib test",
     "lint": "eslint src"
   },
   "dependencies": {
@@ -55,6 +56,7 @@
     "@babel/core": "^7.17.10",
     "@babel/plugin-proposal-nullish-coalescing-operator": "^7.16.7",
     "@babel/plugin-proposal-optional-chaining": "^7.16.7",
+    "@eslint/eslintrc": "^3.2.0",
     "@rollup/plugin-commonjs": "^22.0.0",
     "@rollup/plugin-inject": "^4.0.4",
     "@rollup/plugin-node-resolve": "^13.3.0",