eslint: migrate to new flat config (.eslintrc.cjs -> eslint.config.js)

https://eslint.org/docs/latest/use/configure/configuration-files-new https://eslint.org/docs/latest/use/configure/migration-guide
vogler · Nov 8, 2023 · 110b2ea · 110b2ea
1 parent c5f75e0
commit 110b2ea
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Showing 3 changed files with 75 additions and 79 deletions.
diff --git a/.eslintignore b/.eslintignore
diff --git a/.eslintrc.cjs b/.eslintrc.cjs
diff --git a/eslint.config.js b/eslint.config.js
@@ -0,0 +1,75 @@
+// https://eslint.org/docs/latest/use/configure/configuration-files-new
+// https://eslint.org/docs/latest/use/configure/migration-guide
+import js from '@eslint/js';
+import globals from 'globals';
+import stylistic from '@stylistic/eslint-plugin-js';
+
+export default [
+  // https://eslint.org/docs/latest/use/configure/configuration-files-new#globally-ignoring-files-with-ignores
+  // object with just `ignores` applies to all configuration objects
+  // had `ln -s .gitignore .eslintignore` before, but .eslintignore no longer supported
+  {
+    ignores: ['data/**'],
+  },
+  js.configs.recommended, // TODO still needed?
+  {
+    // files: ['*.js'],
+    languageOptions: {
+      globals: globals.node,
+    },
+    plugins: {
+      '@stylistic/js': stylistic,
+    },
+    // https://eslint.org/docs/latest/rules/
+    // https://eslint.style/packages/js
+    rules: {
+      'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+      '@stylistic/js/array-bracket-newline': ['error', 'consistent'],
+      '@stylistic/js/array-bracket-spacing': 'error',
+      '@stylistic/js/array-element-newline': ['error', 'consistent'],
+      '@stylistic/js/arrow-parens': ['error', 'as-needed'],
+      '@stylistic/js/arrow-spacing': 'error',
+      '@stylistic/js/block-spacing': 'error',
+      '@stylistic/js/brace-style': 'error',
+      '@stylistic/js/comma-dangle': ['error', 'always-multiline'],
+      '@stylistic/js/comma-spacing': 'error',
+      '@stylistic/js/comma-style': 'error',
+      '@stylistic/js/eol-last': 'error',
+      '@stylistic/js/func-call-spacing': 'error',
+      '@stylistic/js/function-paren-newline': ['error', 'consistent'],
+      '@stylistic/js/implicit-arrow-linebreak': 'error',
+      '@stylistic/js/indent': ['error', 2],
+      '@stylistic/js/key-spacing': 'error',
+      '@stylistic/js/keyword-spacing': 'error',
+      '@stylistic/js/linebreak-style': 'error',
+      '@stylistic/js/no-extra-parens': 'error',
+      '@stylistic/js/no-extra-semi': 'error',
+      '@stylistic/js/no-mixed-spaces-and-tabs': 'error',
+      '@stylistic/js/no-multi-spaces': 'error',
+      '@stylistic/js/no-multiple-empty-lines': 'error',
+      '@stylistic/js/no-tabs': 'error',
+      '@stylistic/js/no-trailing-spaces': 'error',
+      '@stylistic/js/no-whitespace-before-property': 'error',
+      '@stylistic/js/nonblock-statement-body-position': 'error',
+      '@stylistic/js/object-curly-newline': 'error',
+      '@stylistic/js/object-curly-spacing': ['error', 'always'],
+      '@stylistic/js/object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
+      '@stylistic/js/quote-props': ['error', 'as-needed'],
+      '@stylistic/js/quotes': ['error', 'single'],
+      '@stylistic/js/rest-spread-spacing': 'error',
+      '@stylistic/js/semi': 'error',
+      '@stylistic/js/semi-spacing': 'error',
+      '@stylistic/js/semi-style': 'error',
+      '@stylistic/js/space-before-blocks': 'error',
+      '@stylistic/js/space-before-function-paren': ['error', { anonymous: 'never', named: 'never', asyncArrow: 'always' }],
+      '@stylistic/js/space-in-parens': 'error',
+      '@stylistic/js/space-infix-ops': 'error',
+      '@stylistic/js/space-unary-ops': 'error',
+      '@stylistic/js/spaced-comment': 'error',
+      '@stylistic/js/switch-colon-spacing': 'error',
+      '@stylistic/js/template-curly-spacing': 'error',
+      '@stylistic/js/template-tag-spacing': 'error',
+      '@stylistic/js/wrap-regex': 'error',
+    },
+  },
+];