const path = require('path'); const { version: reactVersion } = require('react/package.json'); module.exports = { root: true, // Ignore files which are also in .prettierignore ignorePatterns: [ 'app/vendor/**', 'builds/**/*', 'development/chromereload.js', 'development/charts/**', 'development/ts-migration-dashboard/build/**', 'dist/**/*', 'node_modules/**/*', ], overrides: [ /** * == Modules == * * The first two sections here, which cover module syntax, are mutually * exclusive: the set of files covered between them may NOT overlap. This is * because we do not allow a file to use two different styles for specifying * imports and exports (however theoretically possible it may be). */ { /** * Modules (CommonJS module syntax) * * This is code that uses `require()` and `module.exports` to import and * export other modules. */ files: [ '.eslintrc.js', '.eslintrc.*.js', '.mocharc.js', '*.config.js', 'development/**/*.js', 'test/e2e/**/*.js', 'test/helpers/*.js', 'test/lib/wait-until-called.js', ], extends: [ path.resolve(__dirname, '.eslintrc.base.js'), path.resolve(__dirname, '.eslintrc.node.js'), path.resolve(__dirname, '.eslintrc.babel.js'), path.resolve(__dirname, '.eslintrc.typescript-compat.js'), ], settings: { 'import/resolver': { // When determining the location of a `require()` call, use Node's // resolution algorithm, then fall back to TypeScript's. This allows // TypeScript files (which Node's algorithm doesn't recognize) to be // imported from JavaScript files, while also preventing issues when // using packages like `prop-types` (where we would otherwise get "No // default export found in imported module 'prop-types'" from // TypeScript because imports work differently there). node: {}, typescript: { // Always try to resolve types under `/@types` directory even // it doesn't contain any source code, like `@types/unist` alwaysTryTypes: true, }, }, }, }, /** * Modules (ES module syntax) * * This is code that explicitly uses `import`/`export` instead of * `require`/`module.exports`. */ { files: [ 'app/**/*.js', 'shared/**/*.js', 'ui/**/*.js', '**/*.test.js', 'test/lib/**/*.js', 'test/mocks/**/*.js', 'test/jest/**/*.js', 'test/stub/**/*.js', 'test/unit-global/**/*.js', ], // TODO: Convert these files to modern JS excludedFiles: ['test/lib/wait-until-called.js'], extends: [ path.resolve(__dirname, '.eslintrc.base.js'), path.resolve(__dirname, '.eslintrc.node.js'), path.resolve(__dirname, '.eslintrc.babel.js'), path.resolve(__dirname, '.eslintrc.typescript-compat.js'), ], parserOptions: { sourceType: 'module', }, settings: { 'import/resolver': { // When determining the location of an `import`, use Node's resolution // algorithm, then fall back to TypeScript's. This allows TypeScript // files (which Node's algorithm doesn't recognize) to be imported // from JavaScript files, while also preventing issues when using // packages like `prop-types` (where we would otherwise get "No // default export found in imported module 'prop-types'" from // TypeScript because imports work differently there). node: {}, typescript: { // Always try to resolve types under `/@types` directory even // it doesn't contain any source code, like `@types/unist` alwaysTryTypes: true, }, }, }, }, /** * TypeScript files */ { files: ['*.{ts,tsx}'], extends: [ path.resolve(__dirname, '.eslintrc.base.js'), '@metamask/eslint-config-typescript', path.resolve(__dirname, '.eslintrc.typescript-compat.js'), ], rules: { // Turn these off, as it's recommended by typescript-eslint. // See: 'import/named': 'off', 'import/namespace': 'off', 'import/default': 'off', 'import/no-named-as-default-member': 'off', // Disabled due to incompatibility with Record. // See: '@typescript-eslint/consistent-type-definitions': 'off', // Modified to include the 'ignoreRestSiblings' option. // TODO: Migrate this rule change back into `@metamask/eslint-config` '@typescript-eslint/no-unused-vars': [ 'error', { vars: 'all', args: 'all', argsIgnorePattern: '[_]+', ignoreRestSiblings: true, }, ], }, settings: { 'import/resolver': { // When determining the location of an `import`, prefer TypeScript's // resolution algorithm. Note that due to how we've configured // TypeScript in `tsconfig.json`, we are able to import JavaScript // files from TypeScript files. typescript: { // Always try to resolve types under `/@types` directory even // it doesn't contain any source code, like `@types/unist` alwaysTryTypes: true, }, }, }, }, { files: ['*.d.ts'], parserOptions: { sourceType: 'script', }, }, /** * == Everything else == * * The sections from here on out may overlap with each other in various * ways depending on their function. */ /** * React-specific code * * Code in this category contains JSX and hence needs to be run through the * React plugin. */ { files: [ 'test/lib/render-helpers.js', 'test/jest/rendering.js', 'ui/**/*.js', ], extends: ['plugin:react/recommended', 'plugin:react-hooks/recommended'], parserOptions: { ecmaFeatures: { jsx: true, }, }, plugins: ['react'], rules: { 'react/no-unused-prop-types': 'error', 'react/no-unused-state': 'error', 'react/jsx-boolean-value': 'error', 'react/jsx-curly-brace-presence': [ 'error', { props: 'never', children: 'never' }, ], 'react/no-deprecated': 'error', 'react/default-props-match-prop-types': 'error', 'react/jsx-no-duplicate-props': 'error', }, settings: { react: { // If this is set to 'detect', ESLint will import React in order to // find its version. Because we run ESLint in the build system under // LavaMoat, this means that detecting the React version requires a // LavaMoat policy for all of React, in the build system. That's a // no-go, so we grab it from React's package.json. version: reactVersion, }, }, }, /** * Mocha tests * * These are files that make use of globals and syntax introduced by the * Mocha library. */ { files: [ '**/*.test.js', 'test/lib/wait-until-called.js', 'test/e2e/**/*.spec.js', ], excludedFiles: [ 'app/scripts/controllers/network/**/*.test.js', 'app/scripts/controllers/permissions/**/*.test.js', 'app/scripts/lib/**/*.test.js', 'app/scripts/migrations/*.test.js', 'app/scripts/platforms/*.test.js', 'development/**/*.test.js', 'shared/**/*.test.js', 'ui/**/*.test.js', 'ui/__mocks__/*.js', ], extends: ['@metamask/eslint-config-mocha'], rules: { // In Mocha tests, it is common to use `this` to store values or do // things like force the test to fail. '@babel/no-invalid-this': 'off', 'mocha/no-setup-in-describe': 'off', }, }, /** * Jest tests * * These are files that make use of globals and syntax introduced by the * Jest library. */ { files: [ '**/__snapshots__/*.snap', 'app/scripts/controllers/network/**/*.test.js', 'app/scripts/controllers/permissions/**/*.test.js', 'app/scripts/lib/**/*.test.js', 'app/scripts/migrations/*.test.js', 'app/scripts/platforms/*.test.js', 'development/**/*.test.js', 'shared/**/*.test.js', 'test/jest/*.js', 'test/helpers/*.js', 'ui/**/*.test.js', 'ui/__mocks__/*.js', ], extends: ['@metamask/eslint-config-jest'], parserOptions: { sourceType: 'module', }, rules: { 'import/unambiguous': 'off', 'import/named': 'off', 'jest/no-large-snapshots': [ 'error', { maxSize: 50, inlineMaxSize: 50 }, ], 'jest/no-restricted-matchers': 'off', /** * jest/prefer-to-be is a new rule that was disabled to reduce churn * when upgrading eslint. It should be considered for use and enabled * in a future PR if agreeable. */ 'jest/prefer-to-be': 'off', /** * jest/lowercase-name was renamed to jest/prefer-lowercase-title this * change was made to essentially retain the same state as the original * eslint-config-jest until it is updated. At which point the following * two lines can be deleted. */ 'jest/lowercase-name': 'off', 'jest/prefer-lowercase-title': ['error', { ignore: ['describe'] }], }, }, /** * Migrations */ { files: ['app/scripts/migrations/*.js', '**/*.stories.js'], rules: { 'import/no-anonymous-default-export': ['error', { allowObject: true }], }, }, /** * Executables and related files * * These are files that run in a Node context. They are either designed to * run as executables (in which case they will have a shebang at the top) or * are dependencies of executables (in which case they may use * `process.exit` to exit). */ { files: [ 'development/**/*.js', 'test/e2e/benchmark.js', 'test/helpers/setup-helper.js', ], rules: { 'node/no-process-exit': 'off', 'node/shebang': 'off', }, }, /** * Lockdown files */ { files: [ 'app/scripts/lockdown-run.js', 'app/scripts/lockdown-more.js', 'test/helpers/protect-intrinsics-helpers.js', 'test/unit-global/protect-intrinsics.test.js', ], globals: { harden: 'readonly', Compartment: 'readonly', }, }, { files: ['app/scripts/lockdown-run.js', 'app/scripts/lockdown-more.js'], parserOptions: { sourceType: 'script', }, }, ], };