eslint.config.mjs

eslint.config.mjs

import eslint from '@eslint/js';
import simpleImportSort from 'eslint-plugin-simple-import-sort';
import globals from 'globals';
import lodash from 'lodash';
import typescriptEslint from 'typescript-eslint';

// Merged typescript eslint config.
export const eslintConfigTypescript = typescriptEslint.configs.all.reduce(
  (result, config) => lodash.merge(result, config),
  {},
);

// File wildcards.
export const ESLINT_JS_FILE_WILDCARDS = ['src/**/*.{js,cjs,mjs}', 'src/*.{js,cjs,mjs}', '*.{js,cjs,mjs}'];
export const ESLINT_TS_FILE_WILDCARDS = ['src/**/*.ts', 'src/*.ts', '*.ts'];

export const ESLINT_JS_IGNORES_FILE_WILDCARDS = ['.pnp.*'];
export const ESLINT_TS_IGNORES_FILE_WILDCARDS = [...ESLINT_JS_IGNORES_FILE_WILDCARDS];

// Rules.
export const ESLINT_JS_RULES = {
  'capitalized-comments': 'off',
  complexity: 'off',
  eqeqeq: 'off',
  // eslint-disable-next-line no-magic-numbers
  indent: ['error', 2],
  'max-depth': 'off',
  'max-lines': 'off',
  'max-lines-per-function': 'off',
  'max-statements': 'off',
  'multiline-comment-style': 'off',
  'no-await-in-loop': 'off',
  'no-bitwise': 'off',
  'no-console': 'off',
  'no-continue': 'off',
  'no-duplicate-imports': 'off',
  'no-eq-null': 'off',
  'no-negated-condition': 'off',
  'no-ternary': 'off',
  'no-undefined': 'off',
  'no-void': 'off',
  'one-var': 'off',
  'prefer-named-capture-group': 'off',
  'require-atomic-updates': 'off',
  'simple-import-sort/imports': 'warn',
  'simple-import-sort/exports': 'warn',
  'sort-imports': 'off',
  'sort-keys': 'off',
  'sort-vars': 'off',
};

export const ESLINT_TS_RULES = {
  ...ESLINT_JS_RULES,
  '@typescript-eslint/naming-convention': [
    'error',
    {
      selector: 'enumMember',
      format: ['UPPER_CASE'],
    },
  ],
  '@typescript-eslint/explicit-function-return-type': 'off',
  '@typescript-eslint/explicit-module-boundary-types': 'off',
  '@typescript-eslint/init-declarations': 'off',
  '@typescript-eslint/max-params': 'off',
  '@typescript-eslint/no-magic-numbers': [
    'error',
    {
      // eslint-disable-next-line no-magic-numbers
      ignore: [0, 1, -1],
    },
  ],
  '@typescript-eslint/prefer-readonly-parameter-types': 'off',
  '@typescript-eslint/require-array-sort-compare': 'off',
  '@typescript-eslint/use-unknown-in-catch-callback-variable': 'off',
};

// Plugins.
export const ESLINT_JS_PLUGINS = {
  'simple-import-sort': simpleImportSort,
};

export const ESLINT_TS_PLUGINS = {
  ...ESLINT_JS_PLUGINS,
  '@typescript-eslint': typescriptEslint.plugin,
};

// Other options.
export const ESLINT_GLOBALS = {
  ...globals.node,
};

export const ESLINT_JS_LANGUAGE_OPTIONS = {
  globals: ESLINT_GLOBALS,
  ecmaVersion: 'latest',
  sourceType: 'module',
};

export const ESLINT_TS_LANGUAGE_OPTIONS = {
  ...ESLINT_JS_LANGUAGE_OPTIONS,
  parser: typescriptEslint.parser,
  parserOptions: {
    ecmaVersion: 'latest',
    sourceType: 'module',
    project: 'tsconfig.json',
  },
};

// Utils.
export const convertToRecord = (object) => ({ ...object });

// Configs.
export const JS_CONFIG = lodash.merge({}, convertToRecord(eslint.configs.all), {
  files: ESLINT_JS_FILE_WILDCARDS,
  ignores: ESLINT_JS_IGNORES_FILE_WILDCARDS,
  languageOptions: ESLINT_JS_LANGUAGE_OPTIONS,
  plugins: ESLINT_JS_PLUGINS,
  rules: ESLINT_JS_RULES,
});

export const TS_CONFIG = lodash.merge({}, convertToRecord(eslint.configs.all), eslintConfigTypescript, {
  files: ESLINT_TS_FILE_WILDCARDS,
  ignores: ESLINT_TS_IGNORES_FILE_WILDCARDS,
  languageOptions: ESLINT_TS_LANGUAGE_OPTIONS,
  plugins: ESLINT_TS_PLUGINS,
  rules: ESLINT_TS_RULES,
});

export default [JS_CONFIG, TS_CONFIG];