"use strict"; const path = require("node:path"); const { isCI } = require("ci-info"); module.exports = { root: true, env: { es2022: true, node: true, }, parserOptions: { ecmaVersion: "latest", sourceType: "module", }, extends: [ "eslint:recommended", "prettier", "plugin:regexp/recommended", "plugin:unicorn/recommended", ], plugins: [ "prettier-internal-rules", "import", "n", "regexp", "unicorn", "@typescript-eslint", ], rules: { "arrow-body-style": ["error", "as-needed"], curly: "error", "dot-notation": "error", eqeqeq: "error", "logical-assignment-operators": "error", "no-console": isCI ? "error" : "warn", "no-constant-binary-expression": "error", "no-duplicate-imports": "error", "no-else-return": [ "error", { allowElseIf: false, }, ], "no-implicit-coercion": "error", "no-inner-declarations": "error", "no-lonely-if": "error", "no-restricted-syntax": [ "error", // `!foo === bar` and `!foo !== bar` 'BinaryExpression[operator=/^[!=]==$/] > UnaryExpression.left[operator="!"]', ], "no-return-await": "error", "no-unneeded-ternary": "error", "no-useless-return": "error", "no-unused-expressions": [ "error", { allowShortCircuit: true, allowTernary: true, }, ], "no-unused-vars": [ "error", { ignoreRestSiblings: true, }, ], "no-var": "error", "object-shorthand": [ "error", "always", { avoidExplicitReturnArrows: true, }, ], "one-var": ["error", "never"], "prefer-arrow-callback": "error", "prefer-const": [ "error", { destructuring: "all", }, ], "prefer-destructuring": [ "error", { VariableDeclarator: { array: false, object: true, }, AssignmentExpression: { array: false, object: false, }, }, { enforceForRenamedProperties: false, }, ], "prefer-object-has-own": "error", "prefer-object-spread": "error", "prefer-rest-params": "error", "prefer-spread": "error", quotes: [ "error", "double", { avoidEscape: true, }, ], "require-await": "error", "symbol-description": "error", yoda: [ "error", "never", { exceptRange: true, }, ], // Internal rules "prettier-internal-rules/jsx-identifier-case": "error", "prettier-internal-rules/no-identifier-n": "error", "prettier-internal-rules/prefer-fs-promises-submodule": "error", // @typescript-eslint/eslint-plugin "@typescript-eslint/prefer-ts-expect-error": "error", // eslint-plugin-import "import/extensions": ["error", "ignorePackages"], "import/no-extraneous-dependencies": [ "error", { devDependencies: [ "jest.config.js", "tests/**", "scripts/**", "website/**/*", ], }, ], "import/order": "error", "import/no-anonymous-default-export": [ "error", { allowArray: true, allowArrowFunction: true, allowAnonymousClass: false, allowAnonymousFunction: false, allowCallExpression: true, // Unreleased // allowNew: true, allowLiteral: true, allowObject: true, }, ], // eslint-plugin-n "n/no-path-concat": "error", // eslint-plugin-regexp "regexp/match-any": [ "error", { allows: ["dotAll"], }, ], /* cspell:disable-next-line */ "regexp/no-extra-lookaround-assertions": "error", "regexp/no-missing-g-flag": "error", "regexp/no-useless-flag": [ "error", { strictTypes: false, }, ], /* cspell:disable-next-line */ "regexp/prefer-lookaround": [ "error", { strictTypes: false, }, ], // Conflicting with `unicorn/better-regex` "regexp/strict": "off", // Hard to fix "regexp/no-empty-alternative": "off", "regexp/no-super-linear-backtracking": "off", // eslint-plugin-unicorn "unicorn/escape-case": "off", "unicorn/catch-error-name": "off", "unicorn/consistent-destructuring": "off", "unicorn/consistent-function-scoping": "off", "unicorn/import-style": "off", "unicorn/no-array-callback-reference": "off", "unicorn/no-array-method-this-argument": "off", "unicorn/no-array-reduce": "off", "unicorn/no-await-expression-member": "off", "unicorn/no-for-loop": "off", "unicorn/no-hex-escape": "off", "unicorn/no-negated-condition": "off", "unicorn/no-nested-ternary": "off", "unicorn/no-null": "off", "unicorn/no-process-exit": "off", "unicorn/no-thenable": "off", "unicorn/no-unreadable-array-destructuring": "off", "unicorn/no-useless-switch-case": "off", "unicorn/number-literal-case": "off", "unicorn/numeric-separators-style": "off", "unicorn/prefer-array-flat": [ "error", { functions: ["flat", "flatten"], }, ], "unicorn/prefer-add-event-listener": "off", "unicorn/prefer-at": [ "error", { getLastElementFunctions: ["getLast"], }, ], "unicorn/prefer-code-point": "off", "unicorn/prefer-dom-node-append": "off", "unicorn/prefer-dom-node-remove": "off", "unicorn/prefer-export-from": [ "error", { ignoreUsedVariables: true, }, ], "unicorn/prefer-query-selector": "off", "unicorn/prefer-ternary": "off", "unicorn/prevent-abbreviations": "off", "unicorn/relative-url-style": "off", "unicorn/switch-case-braces": ["error", "avoid"], }, overrides: [ // CommonJS modules { files: [ "**/*.cjs", "scripts/tools/eslint-plugin-prettier-internal-rules/**/*.js", "website/**/*.js", ], parserOptions: { sourceType: "script", }, rules: { strict: "error", "unicorn/prefer-module": "off", "unicorn/prefer-node-protocol": "off", }, }, { files: ["scripts/**/*", "tests/config/install-prettier.js"], rules: { "no-console": "off", }, }, { files: ["scripts/**/*.js"], rules: { "unicorn/prefer-top-level-await": "error", }, }, { files: [ "tests/config/**/*.js", "tests/format/**/jsfmt.spec.js", "tests/integration/**/*.js", "tests/unit/**/*.js", "tests/dts/unit/**/*.js", "scripts/release/__tests__/**/*.spec.js", ], env: { jest: true, }, plugins: ["jest"], rules: { "jest/valid-expect": [ "error", { alwaysAwait: true, }, ], "jest/prefer-to-be": "error", }, }, { files: ["tests/format/**/*.js"], rules: { "prettier-internal-rules/no-legacy-format-test-fixtures": "error", }, }, { files: ["tests/integration/**/*.js"], rules: { "prettier-internal-rules/await-cli-tests": "error", }, }, { files: ["tests/**/*.js"], rules: { // TODO: Enable this when we drop support for Node.js v14 "logical-assignment-operators": "off", "unicorn/prefer-array-flat": "off", "unicorn/prefer-array-flat-map": "off", "unicorn/prefer-string-replace-all": "off", }, globals: { run_spec: "readonly", runCli: "readonly", }, }, { files: ["src/cli/**/*.js"], rules: { "n/no-restricted-import": [ "error", [ { name: [ path.resolve(__dirname, "src/**"), `!${path.resolve(__dirname, "src/cli/**")}`, `!${path.resolve(__dirname, "src/index.js")}`, `!${path.resolve(__dirname, "src/common/mockable.js")}`, ], message: "Don't use code from other directory.", }, ], ], }, }, { files: ["src/cli/*/*.js"], rules: { "no-restricted-modules": [ "error", { patterns: ["../../"], }, ], }, }, { files: "src/language-js/needs-parens.js", rules: { "prettier-internal-rules/better-parent-property-check-in-needs-parens": "error", }, }, { files: "src/**/*.js", rules: { "prettier-internal-rules/flat-ast-path-call": "error", "prettier-internal-rules/no-conflicting-comment-check-flags": "error", "prettier-internal-rules/no-doc-public-import": "error", "prettier-internal-rules/no-empty-flat-contents-for-if-break": "error", "prettier-internal-rules/no-unnecessary-ast-path-call": "error", "prettier-internal-rules/prefer-ast-path-each": "error", "prettier-internal-rules/prefer-indent-if-break": "error", "prettier-internal-rules/prefer-is-non-empty-array": "error", "prettier-internal-rules/prefer-ast-path-getters": "error", }, }, { files: ["src/language-*/**/*.js"], rules: { "prettier-internal-rules/directly-loc-start-end": "error", }, }, { files: ["src/language-js/**/*.js"], excludedFiles: ["src/language-js/parse/postprocess/*.js"], rules: { "prettier-internal-rules/no-node-comments": [ "error", { file: "src/language-js/utils/index.js", functions: ["hasComment", "getComments"], }, "src/language-js/pragma.js", "src/language-js/parse/babel.js", "src/language-js/parse/meriyah.js", "src/language-js/parse/json.js", "src/language-js/parse/acorn.js", "src/language-js/parse/utils/wrap-babel-expression.js", ], "prettier-internal-rules/prefer-create-type-check-function": [ "error", { ignoreSingleType: true, onlyTopLevelFunctions: true, }, ], }, }, { files: ["website/**/*"], env: { browser: true, worker: true, }, extends: ["plugin:react/recommended"], settings: { react: { version: "18", }, }, rules: { "react/display-name": "off", "react/no-deprecated": "off", "react/prop-types": "off", "unicorn/filename-case": "off", }, }, { files: ["website/playground/**/*"], parserOptions: { sourceType: "module", }, }, { files: ["bin/prettier.cjs"], parserOptions: { ecmaVersion: 5, }, rules: { "no-var": "off", "prefer-arrow-callback": "off", }, }, ], };