.eslintrc.yaml

parser: babel-eslint
plugins:
 - react-native
 - jest
 - flowtype
env:
  browser: true
  mocha: true
  node: true
  jest: true
globals: # true/false means mutable/const
  __DEV__: false
  __TEST__: false
extends:
  - airbnb
  - plugin:jest/recommended
  - ./tools/formatting.eslintrc.yaml
settings:
  import/resolver:
    node:
      extensions: [.js, .ios.js, .android.js, .json]
rules:
  # Formatting and naming
  camelcase: off

  # Disable a bunch of rules that should be taken care of by prettier.
  arrow-parens: off
  comma-dangle: off
  function-paren-newline: off
  indent: off
  max-len: off
  no-mixed-operators: off
  object-curly-newline: off
  quote-props: off

  # For more formatting rules, see tools/formatting.eslintrc.yaml.

  # Tricky code.  We repeal several bans from the Airbnb style.
  no-bitwise: off
  no-confusing-arrow: off
  no-continue: off
  no-plusplus: off
  no-nested-ternary: off

  # Likely-wrong code
  no-unused-vars: [warn, {vars: local, args: none}]
  # no-param-reassign seems well-intentioned... but fires on common uses
  # of Array#reduce.  Too noisy.
  no-param-reassign: off

  # Imports
  import/prefer-default-export: off
  import/no-extraneous-dependencies:
  - error
  - devDependencies: ['**/__tests__/*.js', tools/**]

  # Jest
  # This rule could be useful if it fired only on new instances; but we
  # don't have a way to do that, and it doesn't make sense to keep these
  # out of the repo.
  jest/no-disabled-tests: off

  # React
  react/jsx-filename-extension: off  # Like RN upstream, we call the files *.js.
  react/require-default-props: off  # We handle this better with types.
  # These two could be good to fix.
  react/prefer-stateless-function: off
  react/sort-comp: off

  # React Native.  This plugin isn't included in the airbnb config, and
  # nothing is enabled by default, so we enable its rules.
  react-native/no-unused-styles: error
  react-native/no-inline-styles: error
  # react-native/no-color-literals: error  # TODO eliminate these and enable.

  # Flow
  flowtype/boolean-style: [error, boolean]
  flowtype/define-flow-type: warn
  flowtype/delimiter-dangle: off
  flowtype/generic-spacing: [error, never]
  flowtype/no-primitive-constructor-types: error
  flowtype/no-types-missing-file-annotation: error
  ################# flowtype/no-weak-types: error
  flowtype/object-type-delimiter: [error, comma]
  # flowtype/require-parameter-type: error
  # flowtype/require-return-type: [error, always, {annotateUndefined: never}]
  flowtype/require-valid-file-annotation: error
  flowtype/semi: [error, always]
  flowtype/space-before-generic-bracket: [error, never]
  flowtype/space-before-type-colon: [error, never]
  # For more formatting rules, see tools/formatting.eslintrc.yaml.
  flowtype/type-id-match: [error, '^([A-Z][a-z0-9]+)+$']
  flowtype/union-intersection-spacing: [error, always]
  flowtype/use-flow-type: warn
  flowtype/valid-syntax: warn

  # spellcheck/spell-checker: see tools/spellcheck.eslintrc.yaml .