Feature/flat config

.eslintignore

@@ -5,8 +5,6 @@ dist/
 .vscode/
 node_modules/
 coverage/
-!.eslintrc.js
-!.prettierrc.js
 !*.js
 !*.ts
 !.vscode/*.json

.vscode/settings.json

@@ -5,9 +5,16 @@
     ],
     "editor.formatOnSave": true,
     "editor.defaultFormatter": "dbaeumer.vscode-eslint",
+    "editor.codeActionsOnSave": {
+        "source.organizeImports": "never"
+    },
     "[javascript,typescript]": {
-        "editor.defaultFormatter": "dbaeumer.vscode-eslint"
+        "editor.defaultFormatter": "dbaeumer.vscode-eslint",
+        "editor.codeActionsOnSave": {
+            "source.organizeImports": "never"
+        },
     },
+    "eslint.experimental.useFlatConfig": true,
     "jest.jestCommandLine": "npm test -- ",
     "jest.runMode": {
         "type": "on-demand"

eslint.config.js

@@ -0,0 +1,171 @@
+const stylistic = require('@stylistic/eslint-plugin');
+const js = require('@eslint/js');
+const tseslint = require('typescript-eslint');
+
+const ts = require('@typescript-eslint/eslint-plugin');
+const tsParser = require('@typescript-eslint/parser');
+// When it works again do `npm install --save-dev eslint-plugin-import`
+// const imprt = require('eslint-plugin-import');
+// https://github.com/eslint/eslint/issues/18087
+// https://github.com/import-js/eslint-plugin-import/pull/2829
+const globals = require('globals');
+const jest = require('eslint-plugin-jest');
+const off = 'off';
+
+const warn = 'warn';
+
+const error = 'error';
+
+// const TEST_ONLY_IMPORTS = ['fast-check', 'jest'];
+
+/**
+ * set of typescript-eslint any rules
+ * @param {'error' | 'warn' | 'off'} level
+ * @returns
+ */
+const any_rules = (level) => {
+  return {
+    '@typescript-eslint/no-unsafe-return': level,
+    '@typescript-eslint/no-var-requires': level,
+    '@typescript-eslint/no-unsafe-member-access': level,
+    '@typescript-eslint/no-unsafe-assignment': level,
+    '@typescript-eslint/no-unsafe-argument': level,
+    '@typescript-eslint/no-unsafe-call': level,
+    '@typescript-eslint/no-explicit-any': level,
+  };
+};
+
+module.exports = [
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    languageOptions: {
+      globals: globals.node,
+      parser: tsParser,
+      parserOptions: {
+        ecmaVersion: 2022,
+        sourceType: 'module',
+        tsconfigRootDir: __dirname,
+        project: [
+          './tsconfig.eslint.json',
+          './tsconfig.json',
+          '/tsconfig.prod.json',
+        ],
+      },
+    },
+  },
+  stylistic.configs['recommended-flat'],
+  stylistic.configs.customize({
+    // the following options are the default values
+    semi: true,
+  }),
+  {
+    languageOptions: { parser: tsParser },
+    plugins: {
+      // 'import': imprt,
+      '@stylistic': stylistic,
+      ts,
+    },
+  },
+  {
+    ignores: [
+      '**/node_modules',
+      '**/dist',
+      '**/build',
+      '**/__snapshots__',
+      '**/mocks',
+      '**/coverage',
+      '**/report',
+    ],
+  },
+  {
+    rules: {
+      ...ts.configs['eslint-recommended'].rules,
+      ...ts.configs['recommended'].rules,
+      ...ts.configs['recommended-requiring-type-checking'].rules,
+      // ...imprt.configs['errors'].rules,
+      // ...imprt.configs['warnings'].rules,
+      // ...imprt.configs['typescript'].rules,
+      // "import/no-extraneous-dependencies": error,
+      'no-console': error,
+      '@typescript-eslint/return-await': ['error', 'always'],
+      'no-unused-vars': off,
+      '@typescript-eslint/no-unused-vars': error,
+      'eqeqeq': [error, 'smart'],
+      'no-else-return': [
+        error,
+        {
+          allowElseIf: true,
+        },
+      ],
+      '@typescript-eslint/require-await': error,
+      '@typescript-eslint/unbound-method': [
+        error,
+        {
+          ignoreStatic: true,
+        },
+      ],
+      // See https://github.com/orgs/react-hook-form/discussions/8622#discussioncomment-4060570
+      '@typescript-eslint/no-misused-promises': [
+        error,
+        {
+          checksVoidReturn: {
+            attributes: false,
+          },
+        },
+      ],
+      // 'no-restricted-imports': [
+      //   'error',
+      //   {
+      //     paths: TEST_ONLY_IMPORTS.map((name) => {
+      //       return { name,
+      //         message: `${name} is only available during testing` };
+      //     }),
+      //     patterns: TEST_ONLY_IMPORTS.map(dep => `${dep}/*`),
+      //   },
+      // ],
+      '@typescript-eslint/explicit-member-accessibility': warn,
+      '@typescript-eslint/no-explicit-any': warn,
+      '@typescript-eslint/explicit-function-return-type': off,
+      // '@typescript-eslint/no-var-requires': off,
+      '@typescript-eslint/no-empty-function': off,
+      '@typescript-eslint/no-floating-promises': error,
+    },
+  },
+  {
+    files: ['.*.js', '.*.cjs', '*.config.cjs', '*.config.js', '*.config.ts'],
+    rules: {
+      'no-restricted-imports': off,
+      // Consider if this is too leanient for tests
+      ...any_rules('off'),
+    },
+  },
+  {
+    files: [
+      '**/*.test.js',
+      '**/*.spec.js',
+      '**/*.test.ts',
+      '**/*.spec.ts',
+      'tests/**/*.js',
+      'tests/**/*.ts',
+      '__tests__/**/*.js',
+      '__tests__/**/*.ts',
+      'jest.*.js',
+      'jest.*.ts',
+    ],
+    // https://eslint.org/docs/user-guide/configuring#specifying-environments
+    languageOptions: { globals: globals.jest },
+    plugins: { jest },
+    rules: {
+      ...jest.configs['recommended'].rules,
+      // 'no-restricted-imports': off,
+      'jest/expect-expect': [
+        error,
+        {
+          assertFunctionNames: ['expect', 'fc.assert'],
+        },
+      ],
+      ...any_rules('off'),
+    },
+  },
+];