Merge pull request #1427 from dtolnay/eslint

Set up ESLint

.github/workflows/ci.yml

@@ -176,6 +176,18 @@ jobs:
       - name: Run clang-tidy
         run: clang-tidy-18 src/cxx.cc --warnings-as-errors=*
 
+  eslint:
+    name: ESLint
+    runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request'
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v4
+      - run: npm install
+        working-directory: book
+      - run: npx eslint
+        working-directory: book
+
   outdated:
     name: Outdated
     runs-on: ubuntu-latest

book/build.js

@@ -39,7 +39,7 @@ const dirs = ['build'];
 while (dirs.length) {
   const dir = dirs.pop();
   fs.readdirSync(dir).forEach((entry) => {
-    path = dir + '/' + entry;
+    const path = dir + '/' + entry;
     const stat = fs.statSync(path);
     if (stat.isDirectory()) {
       dirs.push(path);

book/eslint.config.mjs

@@ -0,0 +1,8 @@
+import pluginJs from '@eslint/js';
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { ignores: ['build/*'] },
+  { files: ['**/*.js'], languageOptions: { sourceType: 'commonjs' } },
+  pluginJs.configs.recommended,
+];