summaryrefslogtreecommitdiffstats
path: root/remote/test/puppeteer/.eslintrc.js
blob: 250aa0c169d9971a97de9f5fea5ef504c7c2c180 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
/**
 * @license
 * Copyright 2023 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */

const {readdirSync} = require('fs');
const {join} = require('path');

const rulesDirPlugin = require('eslint-plugin-rulesdir');

rulesDirPlugin.RULES_DIR = 'tools/eslint/lib';

function getThirdPartyPackages() {
  return readdirSync(join(__dirname, 'packages/puppeteer-core/third_party'), {
    withFileTypes: true,
  })
    .filter(dirent => {
      return dirent.isDirectory();
    })
    .map(({name}) => {
      return {
        name,
        message: `Import \`${name}\` from the vendored location: third_party/${name}/index.js`,
      };
    });
}

module.exports = {
  root: true,
  env: {
    node: true,
    es6: true,
  },

  parser: '@typescript-eslint/parser',

  plugins: ['mocha', '@typescript-eslint', 'import', 'rulesdir'],

  extends: ['plugin:prettier/recommended', 'plugin:import/typescript'],

  settings: {
    'import/resolver': {
      typescript: true,
    },
  },

  rules: {
    // Brackets keep code readable.
    curly: ['error', 'all'],
    // Brackets keep code readable and `return` intentions clear.
    'arrow-body-style': ['error', 'always'],
    // Error if files are not formatted with Prettier correctly.
    'prettier/prettier': 'error',
    // syntax preferences
    'spaced-comment': [
      'error',
      'always',
      {
        markers: ['*'],
      },
    ],
    eqeqeq: ['error'],
    'accessor-pairs': [
      'error',
      {
        getWithoutSet: false,
        setWithoutGet: false,
      },
    ],
    'new-parens': 'error',
    'func-call-spacing': 'error',
    'prefer-const': 'error',

    'max-len': [
      'error',
      {
        /* this setting doesn't impact things as we use Prettier to format
         * our code and hence dictate the line length.
         * Prettier aims for 80 but sometimes makes the decision to go just
         * over 80 chars as it decides that's better than wrapping. ESLint's
         * rule defaults to 80 but therefore conflicts with Prettier. So we
         * set it to something far higher than Prettier would allow to avoid
         * it causing issues and conflicting with Prettier.
         */
        code: 200,
        comments: 90,
        ignoreTemplateLiterals: true,
        ignoreUrls: true,
        ignoreStrings: true,
        ignoreRegExpLiterals: true,
      },
    ],
    // anti-patterns
    'no-var': 'error',
    'no-with': 'error',
    'no-multi-str': 'error',
    'no-caller': 'error',
    'no-implied-eval': 'error',
    'no-labels': 'error',
    'no-new-object': 'error',
    'no-octal-escape': 'error',
    'no-self-compare': 'error',
    'no-shadow-restricted-names': 'error',
    'no-cond-assign': 'error',
    'no-debugger': 'error',
    'no-dupe-keys': 'error',
    'no-duplicate-case': 'error',
    'no-empty-character-class': 'error',
    'no-unreachable': 'error',
    'no-unsafe-negation': 'error',
    radix: 'error',
    'valid-typeof': 'error',
    'no-unused-vars': [
      'error',
      {
        args: 'none',
        vars: 'local',
        varsIgnorePattern:
          '([fx]?describe|[fx]?it|beforeAll|beforeEach|afterAll|afterEach)',
      },
    ],
    'no-implicit-globals': ['error'],

    // es2015 features
    'require-yield': 'error',
    'template-curly-spacing': ['error', 'never'],

    // ensure we don't have any it.only or describe.only in prod
    'mocha/no-exclusive-tests': 'error',

    'import/order': [
      'error',
      {
        'newlines-between': 'always',
        alphabetize: {order: 'asc', caseInsensitive: true},
      },
    ],

    'import/no-cycle': ['error', {maxDepth: Infinity}],

    'no-restricted-syntax': [
      'error',
      // Don't allow underscored declarations on camelCased variables/properties.
      // ...RESTRICTED_UNDERSCORED_IDENTIFIERS,
    ],

    // Keeps comments formatted.
    'rulesdir/prettier-comments': 'error',
    // Enforces consistent file extension
    'rulesdir/extensions': 'error',
    // Enforces license headers on files
    'rulesdir/check-license': 'warn',
  },
  overrides: [
    {
      files: ['*.ts'],
      parserOptions: {
        allowAutomaticSingleRunInference: true,
        project: './tsconfig.base.json',
      },
      extends: [
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/stylistic',
      ],
      plugins: ['eslint-plugin-tsdoc'],
      rules: {
        // Enforces clean up of used resources.
        'rulesdir/use-using': 'error',
        // Brackets keep code readable.
        curly: ['error', 'all'],
        // Brackets keep code readable and `return` intentions clear.
        'arrow-body-style': ['error', 'always'],
        // Error if comments do not adhere to `tsdoc`.
        'tsdoc/syntax': 'error',
        // Keeps array types simple only when they are simple for readability.
        '@typescript-eslint/array-type': ['error', {default: 'array-simple'}],
        'no-unused-vars': 'off',
        '@typescript-eslint/no-unused-vars': [
          'error',
          {argsIgnorePattern: '^_', varsIgnorePattern: '^_'},
        ],
        'func-call-spacing': 'off',
        '@typescript-eslint/func-call-spacing': 'error',
        semi: 'off',
        '@typescript-eslint/semi': 'error',
        '@typescript-eslint/no-empty-function': 'off',
        '@typescript-eslint/no-use-before-define': 'off',
        // We have to use any on some types so the warning isn't valuable.
        '@typescript-eslint/no-explicit-any': 'off',
        // We don't require explicit return types on basic functions or
        // dummy functions in tests, for example
        '@typescript-eslint/explicit-function-return-type': 'off',
        // We allow non-null assertions if the value was asserted using `assert` API.
        '@typescript-eslint/no-non-null-assertion': 'off',
        '@typescript-eslint/no-useless-template-literals': 'error',
        /**
         * This is the default options (as per
         * https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/docs/rules/ban-types.md),
         *
         * Unfortunately there's no way to
         */
        '@typescript-eslint/ban-types': [
          'error',
          {
            extendDefaults: true,
            types: {
              /*
               * Puppeteer's API accepts generic functions in many places so it's
               * not a useful linting rule to ban the `Function` type. This turns off
               * the banning of the `Function` type which is a default rule.
               */
              Function: false,
            },
          },
        ],
        // By default this is a warning but we want it to error.
        '@typescript-eslint/explicit-module-boundary-types': 'error',
        'no-restricted-syntax': [
          'error',
          {
            // Never use `require` in TypeScript since they are transpiled out.
            selector: "CallExpression[callee.name='require']",
            message: '`require` statements are not allowed. Use `import`.',
          },
          {
            // We need this as NodeJS will run until all the timers have resolved
            message: 'Use method `Deferred.race()` instead.',
            selector:
              'MemberExpression[object.name="Promise"][property.name="race"]',
          },
          {
            message:
              'Deferred `valueOrThrow` should not be called in `Deferred.race()` pass deferred directly',
            selector:
              'CallExpression[callee.object.name="Deferred"][callee.property.name="race"] > ArrayExpression > CallExpression[callee.property.name="valueOrThrow"]',
          },
        ],
        '@typescript-eslint/no-floating-promises': [
          'error',
          {ignoreVoid: true, ignoreIIFE: true},
        ],
        '@typescript-eslint/prefer-ts-expect-error': 'error',
        // This is more performant; see https://v8.dev/blog/fast-async.
        '@typescript-eslint/return-await': ['error', 'always'],
        // This optimizes the dependency tracking for type-only files.
        '@typescript-eslint/consistent-type-imports': 'error',
        // So type-only exports get elided.
        '@typescript-eslint/consistent-type-exports': 'error',
        // Don't want to trigger unintended side-effects.
        '@typescript-eslint/no-import-type-side-effects': 'error',
      },
      overrides: [
        {
          files: 'packages/puppeteer-core/src/**/*.ts',
          rules: {
            'no-restricted-imports': [
              'error',
              {
                patterns: ['*Events', '*.test.js'],
                paths: [...getThirdPartyPackages()],
              },
            ],
          },
        },
        {
          files: [
            'packages/puppeteer-core/src/**/*.test.ts',
            'tools/mocha-runner/src/test.ts',
          ],
          rules: {
            // With the Node.js test runner, `describe` and `it` are technically
            // promises, but we don't need to await them.
            '@typescript-eslint/no-floating-promises': 'off',
          },
        },
      ],
    },
  ],
};