.eslintrc.yml

root: true
env:
  es2020: true
  node: true
extends:
  - eslint:recommended
  - prettier
  - prettier/unicorn
plugins:
  - import
  - unicorn
  - prettier-internal-rules
settings:
  import/internal-regex: ^linguist-languages/
rules:
  arrow-body-style:
    - error
    - as-needed
  curly: error
  dot-notation: error
  eqeqeq:
    - error
    - always
    - null: ignore
  import/no-extraneous-dependencies:
    - error
    - devDependencies: ["tests*/**", "scripts/**"]
  import/order: error
  no-else-return: error
  no-implicit-coercion: error
  no-inner-declarations: error
  no-unneeded-ternary: error
  no-useless-return: error
  no-unused-vars:
    - error
    - ignoreRestSiblings: true
  no-var: error
  object-shorthand: error
  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-spread: error
  prefer-rest-params: error
  prefer-spread: error
  prettier-internal-rules/jsx-identifier-case: error
  prettier-internal-rules/require-json-extensions: error
  quotes:
    - error
    - double
    - avoidEscape: true
  strict: error
  symbol-description: error
  yoda:
    - error
    - never
    - exceptRange: true
  unicorn/better-regex: error
  unicorn/explicit-length-check: error
  unicorn/new-for-builtins: error
  unicorn/no-array-for-each: error
  unicorn/no-array-push-push: error
  unicorn/no-useless-undefined: error
  unicorn/prefer-includes: error
  unicorn/prefer-number-properties: error
  unicorn/prefer-regexp-test: error
  unicorn/prefer-spread: error
  unicorn/prefer-string-slice: error
overrides:
  - files:
      - scripts/**/*.js
    rules:
      no-console: off
  - files:
      - "**/*.mjs"
    parserOptions:
      sourceType: module
  - files:
      - "{tests,tests_config,tests_integration}/**/*.js"
    env:
      jest: true
    plugins:
      - jest
    rules:
      jest/valid-expect:
        - error
        - alwaysAwait: true
  - files:
      - tests/**/*.js
    rules:
      strict: off
    globals:
      run_spec: false
  - 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/no-doc-builder-concat: error
      prettier-internal-rules/no-empty-flat-contents-for-if-break: 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
  - files:
      - src/language-*/**/*.js
    rules:
      prettier-internal-rules/directly-loc-start-end: error
  - files:
      - src/language-js/**/*.js
    rules:
      prettier-internal-rules/no-node-comments:
        - error
        - file: "src/language-js/utils.js"
          functions:
            - hasComment
            - getComments
        - "src/language-js/parse-postprocess.js"
        - "src/language-js/parser-babel.js"
        - "src/language-js/parser-meriyah.js"
        - "src/language-js/pragma.js"