@vitalik2060/demo-lint/eslint/base.js

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: './tsconfig.json',
    sourceType: 'module',
  },
  env: {
    node: true,
  },
  plugins: ['@typescript-eslint', 'import', 'simple-import-sort', 'dirnames', 'unicorn'],
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.ts', '.tsx', '.js', '.jsx'],
      },
    },
  },
  rules: {
    quotes: ['warn', 'single', { avoidEscape: true, allowTemplateLiterals: false }],
    'padding-line-between-statements': [
      'warn',
      { blankLine: 'always', prev: ['const', 'let', 'var'], next: '*' },
      { blankLine: 'always', prev: '*', next: 'return' },
      {
        blankLine: 'any',
        prev: ['const', 'let', 'var'],
        next: ['const', 'let', 'var'],
      },
    ],
    'no-shadow': 'off',

    // Override default airbnb rules
    'no-plusplus': ['error', { allowForLoopAfterthoughts: true }],
    'no-negated-condition': 'warn',
    'default-case': 'off',
    'no-use-before-define': 'off',
    'prefer-regex-literals': 'off',

    // code smell detection
    complexity: ['warn', 20],
    'max-params': ['warn', 5],
    'max-nested-callbacks': 'warn',
    'no-restricted-properties': [
      'error',
      {
        object: 'it',
        property: 'only',
        message: "Did you forget to remove 'only' from this test?",
      },
      {
        object: 'describe',
        property: 'only',
        message: "Did you forget to remove 'only' from this test?",
      },
      {
        object: 'context',
        property: 'only',
        message: "Did you forget to remove 'only' from this test?",
      },
      {
        object: 'test',
        property: 'only',
        message: "Did you forget to remove 'only' from this test?",
      },
    ],

    // typescript
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/array-type': [
      'error',
      { default: 'array-simple', readonly: 'array-simple' },
    ],
    '@typescript-eslint/consistent-type-assertions': 'error',
    '@typescript-eslint/no-array-constructor': 'error',
    '@typescript-eslint/no-empty-interface': 'error',
    '@typescript-eslint/no-shadow': 'warn',
    '@typescript-eslint/no-explicit-any': 'warn',
    '@typescript-eslint/no-unused-vars': 'warn',
    '@typescript-eslint/no-use-before-define': [
      'error',
      { functions: false, classes: true, variables: true },
    ],
    '@typescript-eslint/default-param-last': 'warn',
    '@typescript-eslint/consistent-type-imports': [
      'error',
      {
        prefer: 'type-imports',
        fixStyle: 'inline-type-imports',
      },
    ],
    '@typescript-eslint/consistent-type-exports': [
      'error',
      {
        fixMixedExportsWithInlineTypeSpecifier: true,
      },
    ],
    '@typescript-eslint/no-unnecessary-type-assertion': 'error',
    '@typescript-eslint/prefer-optional-chain': 'error',

    // Imports, file extensions
    'import/no-extraneous-dependencies': [
      'error',
      { devDependencies: ['**/*.{stories,test,tests,spec}.{js,jsx,ts,tsx}'] },
    ],
    'import/no-cycle': [
      'error',
      {
        ignoreExternal: true,
      },
    ],
    'import/prefer-default-export': 'off',
    'import/no-unresolved': 'off',
    'import/extensions': 'off',
    'import/no-useless-path-segments': [
      'error',
      {
        noUselessIndex: true,
      },
    ],
    'dirnames/match-kebab-case': 'error',
    'unicorn/filename-case': [
      'error',
      {
        case: 'kebabCase',
      },
    ],
    'simple-import-sort/imports': [
      'warn',
      {
        groups: [
          ['dotenv/config'],
          // Node.js builtins. You could also generate this regex if you use a `.js` config.
          // For example: `^(${require("module").builtinModules.join("|")})(/|$)`
          [
            '^(assert|buffer|child_process|cluster|console|constants|crypto|dgram|dns|domain|events|fs|http|https|module|net|os|path|punycode|querystring|readline|repl|stream|string_decoder|sys|timers|tls|tty|url|util|vm|zlib|freelist|v8|process|async_hooks|http2|perf_hooks)(/.*|$)',
          ],
          // Packages. `react` related packages come first.
          ['^react', '^redux', '^@?\\w'],
          // Root path for project
          ['^#'],
          // Parent imports. Put `..` last.
          ['^\\.\\.(?!/?$)', '^\\.\\./?$'],
          // Other relative imports. Put same-folder imports and `.` last.
          ['^\\./(?=.*/)(?!/?$)', '^\\.(?!/?$)', '^\\./?$'],
          // Style imports.
          ['^.+\\.s?css$'],
        ],
      },
    ],
    'import/no-import-module-exports': 'off',
    'no-restricted-imports': [
      'error',
      {
        paths: [
          {
            name: 'lodash',
            message:
              'Import specific parts of "lodash" explicitly, for example: `import isEqual from "lodash/isEqual"`. This will help ensure greater consistency in builds and make it easier to align versions across projects',
          },
        ],
        patterns: [
          {
            group: ['lodash.*'],
            message:
              'Import specific parts of "lodash" explicitly, for example: `import isEqual from "lodash/isEqual"`. This will help ensure greater consistency in builds and make it easier to align versions across projects',
          },
        ],
      },
    ],
    'no-restricted-syntax': [
      'error',
      {
        selector: 'TSTypeReference[typeName.name="PropsWithChildren"]',
        message:
          'Do not use "PropsWithChildren". Use explicit children typing instead, for example: "children?: ReactNode";',
      },
      {
        selector: 'Literal[value=/(?:[a-z][а-яё]|[а-яё][a-z])/i]',
        message:
          'Detected mixed language layout within a single word. For example, "case" (first character in ru-encoding)',
      },
    ],
    'import/consistent-type-specifier-style': ['error', 'prefer-inline'],
    'import/no-duplicates': ['error', { 'prefer-inline': true, considerQueryString: true }],
  },
  overrides: [
    {
      files: ['*.{test,tests,spec}.{js,jsx,ts,tsx}'],
      env: {
        node: true,
        jest: true,
        browser: true,
      },
    },
  ],
};