Unknown option "config" with value "undefined" was found.

• prettier-eslint-cli version: 8.8.1
• prettier version: 1.10.2
• eslint version: 4.17.0

What you did:

prettier-eslint --write "src/**/*.js"

What happened:

Validation Warning:

  Unknown option "config" with value "undefined" was found.
  This is probably a typing mistake. Fixing it will remove this message.

P.S. It outputs this warning for every file. It seems that prettier-eslint-cli sends unnecessary option config in prettierOptions.

[stepankuzmin]

If you run prettier-eslint-cli with -l debug you’ll see:

  ...
  "prettierOptions": Object {
    "arrowParens": "avoid",
    "bracketSpacing": true,
    "config": undefined,  <--------------------- this is unknown option for prettier
    "filepath": "src/components/App/App.js",
    "insertPragma": undefined,
    "jsxBracketSameLine": false,
    "parser": undefined,
    "printWidth": 100,
    "proseWrap": undefined,
    "requirePragma": undefined,
    "semi": true,
    "singleQuote": true,
    "tabWidth": 2,
    "trailingComma": "none",
    "useTabs": undefined,
  },
  ...

So there is unnecessary config option in prettierOptions.

[zimme]

I’ll accept a PR for this, otherwise I hope I have time to fix this over the weekend.