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eslint.config.js
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eslint.config.js
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import * as path from 'node:path';
import { includeIgnoreFile } from '@eslint/compat';
import reactPlugin from 'eslint-plugin-react';
import hooksPlugin from 'eslint-plugin-react-hooks';
import unicorn from 'eslint-plugin-unicorn';
import tseslint from 'typescript-eslint';
export default tseslint.config(
includeIgnoreFile(path.join(import.meta.dirname, '.gitignore')),
{ ignores: ['**/vendor/**'] },
{
files: ['**/*.ts', '**/*.tsx'],
plugins: {
unicorn,
react: reactPlugin,
'react-hooks': hooksPlugin,
// 'react-compiler': compilerPlugin,
},
extends: [
...tseslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
...tseslint.configs.stylisticTypeChecked,
],
rules: {
...reactPlugin.configs['jsx-runtime'].rules,
...hooksPlugin.configs.recommended.rules,
// These rules aren't enabled in typescript-eslint's basic recommended config, but we like them
'@typescript-eslint/no-non-null-assertion': 'error',
// These rules enabled in typescript-eslint's configs don't apply here
'@typescript-eslint/consistent-indexed-object-style': 'off',
'@typescript-eslint/consistent-type-definitions': 'off',
'@typescript-eslint/no-empty-interface': 'off',
'@typescript-eslint/array-type': 'off',
'@typescript-eslint/prefer-promise-reject-errors': 'off',
'@typescript-eslint/no-empty-object-type': 'off',
'@typescript-eslint/consistent-type-exports': 'off',
// Todo: do we want these?
'@typescript-eslint/no-explicit-any': 'off',
'unicorn/filename-case': [
'error',
{
case: 'camelCase',
ignore: [
'TRPC',
'RPC',
'HTTP',
'JSON',
'\\.config\\.js',
'\\.d\\.ts$',
'issue-\\d+-.*\\.test\\.tsx?$',
'\\.(t|j)sx$',
'@trpc/*',
'unstable-*',
'script',
'URL',
'next-app-dir',
],
},
],
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
'@typescript-eslint/naming-convention': [
'error',
{
selector: 'typeParameter',
format: ['PascalCase'],
leadingUnderscore: 'allow',
custom: {
regex: '^(T|\\$)([A-Z]([a-zA-Z]+))?[0-9]*$',
match: true,
},
},
],
'max-params': ['error', 3],
'@typescript-eslint/consistent-type-imports': 'error',
// '@typescript-eslint/consistent-type-exports': 'error',
'@typescript-eslint/no-restricted-imports': [
'error',
{
patterns: [
{
group: ['@trpc/*/src'],
message: 'Remove the "`/src`" part of this import',
allowTypeImports: false,
},
],
},
],
'@typescript-eslint/switch-exhaustiveness-check': 'error',
},
},
{
files: ['examples/**/*', 'packages/*/**/*', 'scripts/**/*', 'www/**/*'],
rules: {
// Todo: enable these for even stronger linting! 💪
'@typescript-eslint/no-misused-promises': 'off',
'@typescript-eslint/no-unsafe-argument': 'off',
'@typescript-eslint/no-unsafe-assignment': 'off',
'@typescript-eslint/no-unsafe-call': 'off',
'@typescript-eslint/no-unsafe-declaration-merging': 'off',
'@typescript-eslint/no-unsafe-member-access': 'off',
'@typescript-eslint/no-unsafe-return': 'off',
'@typescript-eslint/require-await': 'off',
'@typescript-eslint/restrict-plus-operands': 'off',
'@typescript-eslint/restrict-template-expressions': 'off',
},
},
{
files: ['examples/**/*'],
rules: {
'@typescript-eslint/no-floating-promises': 'error',
'@typescript-eslint/no-unused-vars': 'off',
'unicorn/filename-case': 'off',
'@typescript-eslint/no-unused-expressions': 'off',
},
},
{
files: [
'**/test/**/*',
'packages/tests/**/*',
'**/*.test.tsx',
'**/*.test.ts',
],
rules: {
'@typescript-eslint/no-floating-promises': 'off',
'@typescript-eslint/no-non-null-assertion': 'off',
'@typescript-eslint/no-unused-vars': 'off',
'@typescript-eslint/naming-convention': 'off',
'@typescript-eslint/no-unused-expressions': 'off',
'@typescript-eslint/only-throw-error': 'off',
'@typescript-eslint/switch-exhaustiveness-check': 'off',
},
},
{
files: ['packages/**/*'],
rules: {
'no-console': 'error',
},
},
{
files: ['packages/server/src/adapters/**/*'],
rules: {
'no-restricted-imports': [
'error',
{
patterns: [
{
group: ['@trpc/server'],
},
{
group: ['unstable-core-do-not-import'],
message:
'Use e.g. `../@trpc/server/http` instead - avoiding importing core helps us ensure third party adapters can be made',
},
],
},
],
},
},
{
linterOptions: {
reportUnusedDisableDirectives: true,
},
languageOptions: {
sourceType: 'module',
parserOptions: {
projectService: true,
tsconfigRootDir: import.meta.dirname,
},
},
},
);