build: move Javascript config to top level

We need this to support multiple Javascript subprojects (e.g., a frontend and a
documentation website).

1 files changed, 136 insertions, 0 deletions

diff --git a/.eslintrc.cjs b/.eslintrc.cjs
new file mode 100644
index 00000000..da434649
--- /dev/null
+++ b/.eslintrc.cjs
@@ -0,0 +1,136 @@
+/*
+ * SPDX-FileCopyrightText: 2021-2024 The Refinery Authors
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+
+const path = require('node:path');
+
+// Allow the Codium ESLint plugin to find `tsconfig.json` from the repository root.
+const project = [
+  path.join(__dirname, 'tsconfig.json'),
+  path.join(__dirname, 'subprojects/frontend/tsconfig.json'),
+  path.join(__dirname, 'subprojects/frontend/tsconfig.node.json'),
+  path.join(__dirname, 'subprojects/frontend/tsconfig.shared.json'),
+];
+
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  plugins: ['@typescript-eslint', 'mobx'],
+  extends: [
+    'airbnb',
+    'airbnb-typescript',
+    'airbnb/hooks',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:@typescript-eslint/recommended-requiring-type-checking',
+    'plugin:mobx/recommended',
+    'plugin:prettier/recommended',
+  ],
+  parserOptions: {
+    project,
+    sourceType: 'module',
+  },
+  parser: '@typescript-eslint/parser',
+  settings: {
+    'import/parsers': {
+      '@typescript-eslint/parser': ['.ts', '.tsx'],
+    },
+    'import/resolver': {
+      typescript: {
+        alwaysTryTypes: true,
+        project,
+      },
+    },
+  },
+  env: {
+    browser: true,
+  },
+  ignorePatterns: [
+    'build/**/*',
+    'subprojects/*/build/**/*',
+    'subprojects/*/dev-dist/**/*',
+    'subprojects/*/src/**/*.typegen.ts',
+  ],
+  rules: {
+    // In typescript, some class methods implementing an inderface do not use `this`:
+    // https://github.com/typescript-eslint/typescript-eslint/issues/1103
+    'class-methods-use-this': 'off',
+    // Disable rules with a high performance cost.
+    // See https://typescript-eslint.io/linting/troubleshooting/performance-troubleshooting/
+    'import/default': 'off',
+    'import/extensions': 'off',
+    'import/named': 'off',
+    'import/namespace': 'off',
+    'import/no-named-as-default': 'off',
+    'import/no-named-as-default-member': 'off',
+    '@typescript-eslint/indent': 'off',
+    // Make sure every import can be resolved by `eslint-import-resolver-typescript`.
+    'import/no-unresolved': 'error',
+    // Organize imports automatically.
+    'import/order': [
+      'error',
+      {
+        alphabetize: {
+          order: 'asc',
+        },
+        'newlines-between': 'always',
+      },
+    ],
+    // Not all components depend on observable state.
+    'mobx/missing-observer': 'off',
+    // A dangling underscore, while not neccessary for all private fields,
+    // is useful for backing fields of properties that should be read-only from outside the class.
+    'no-underscore-dangle': [
+      'error',
+      {
+        allowAfterThis: true,
+        allowFunctionParams: true,
+      },
+    ],
+    // Use prop spreading to conditionally add props with `exactOptionalPropertyTypes`.
+    'react/jsx-props-no-spreading': 'off',
+    // We use the `react-jsx` runtime, so there is no need to import `React`.
+    'react/react-in-jsx-scope': 'off',
+  },
+  overrides: [
+    {
+      files: ['subprojects/*/types/**/*.d.ts'],
+      rules: {
+        // We don't have control over exports of external modules.
+        'import/prefer-default-export': 'off',
+      },
+    },
+    {
+      files: ['*.cjs'],
+      rules: {
+        // https://github.com/typescript-eslint/typescript-eslint/issues/1724
+        '@typescript-eslint/no-var-requires': 'off',
+      },
+    },
+    {
+      files: [
+        '.eslintrc.cjs',
+        'scripts/*.cjs',
+        'subprojects/*/config/*.ts',
+        'subprojects/*/config/*.cjs',
+        'prettier.config.cjs',
+        'subprojects/*/vite.config.ts',
+      ],
+      env: {
+        browser: false,
+        node: true,
+      },
+      rules: {
+        // Allow devDependencies in configuration files.
+        'import/no-extraneous-dependencies': [
+          'error',
+          { devDependencies: true },
+        ],
+        // Allow writing to the console in ad-hoc scripts.
+        'no-console': 'off',
+        // Access to the environment in configuration files.
+        'no-process-env': 'off',
+      },
+    },
+  ],
+};