Breaking: Defining prettier options must use an object

Drop support for specifying prettier options using the "fb" shorthand
string. Replace "fb" with either config in your .prettierrc or the object:
`{ singleQuote: true, trailingComma: 'all', bracketSpacing: false, jsxBracketSameLine: true, parser: 'flow'}`

Drop support for specifying the prettier options as `null`. Replace
`null` with an empty object `{}`

Author: BPScott

README.md

@@ -60,17 +60,17 @@ To integrate this plugin with `eslint-config-prettier`, you can use the `"recomm
 
 1. In addition to the above installation instructions, install `eslint-config-prettier`:
 
-    ```sh
-    npm install --save-dev eslint-config-prettier
-    ```
+   ```sh
+   npm install --save-dev eslint-config-prettier
+   ```
 
 2. Then you need to add `plugin:prettier/recommended` as the last extension in your `.eslintrc.json`:
 
-    ```json
-    {
-      "extends": ["plugin:prettier/recommended"]
-    }
-    ```
+   ```json
+   {
+     "extends": ["plugin:prettier/recommended"]
+   }
+   ```
 
 This does three things:
 
@@ -101,39 +101,22 @@ For the list of every available exclusion rule set, please see the [readme of es
 
 - The first option:
 
-  - Objects are passed directly to Prettier as [options](https://prettier.io/docs/en/options.html). Example:
+  - An object representing [options](https://prettier.io/docs/en/options.html) that will be passed into prettier. Example:
 
     ```json
     "prettier/prettier": ["error", {"singleQuote": true, "parser": "flow"}]
     ```
 
-  - Or the string `"fb"` may be used to set "Facebook style" defaults:
-
-    ```json
-    "prettier/prettier": ["error", "fb"]
-    ```
-
-    Equivalent to:
-
-    ```json
-    "prettier/prettier": ["error", {
-      "singleQuote": true,
-      "trailingComma": "all",
-      "bracketSpacing": false,
-      "jsxBracketSameLine": true,
-      "parser": "flow"
-    }]
-    ```
-
     NB: This option will merge and override any config set with `.prettierrc` files
 
 - The second option:
 
   - An object with the following options
+
     - `usePrettierrc`: Enables loading of the Prettier configuration file, (default: `true`). May be useful if you are using multiple tools that conflict with each other, or do not wish to mix your ESLint settings with your Prettier configuration.
 
       ```json
-      "prettier/prettier": ["error", null, {
+      "prettier/prettier": ["error", {}, {
         "usePrettierrc": false
       }]
       ```

eslint-plugin-prettier.js

@@ -15,15 +15,6 @@ const diff = require('fast-diff');
 //  Constants
 // ------------------------------------------------------------------------------
 
-// Preferred Facebook style.
-const FB_PRETTIER_OPTIONS = {
-  singleQuote: true,
-  trailingComma: 'all',
-  bracketSpacing: false,
-  jsxBracketSameLine: true,
-  parser: 'flow'
-};
-
 const LINE_ENDING_RE = /\r\n|[\r\n\u2028\u2029]/;
 
 const OPERATION_INSERT = 'insert';
@@ -272,21 +263,16 @@ module.exports = {
         schema: [
           // Prettier options:
           {
-            anyOf: [
-              { enum: [null, 'fb'] },
-              { type: 'object', properties: {}, additionalProperties: true }
-            ]
+            type: 'object',
+            properties: {},
+            additionalProperties: true
           },
           {
-            anyOf: [
-              {
-                type: 'object',
-                properties: {
-                  usePrettierrc: { type: 'boolean' }
-                },
-                additionalProperties: true
-              }
-            ]
+            type: 'object',
+            properties: {
+              usePrettierrc: { type: 'boolean' }
+            },
+            additionalProperties: true
           }
         ]
       },
@@ -308,10 +294,7 @@ module.exports = {
               prettier = require('prettier');
             }
 
-            const eslintPrettierOptions =
-              context.options[0] === 'fb'
-                ? FB_PRETTIER_OPTIONS
-                : context.options[0];
+            const eslintPrettierOptions = context.options[0] || {};
 
             const prettierRcOptions = usePrettierrc
               ? prettier.resolveConfig.sync(filepath, {

test/invalid/11-b.txt

@@ -9,7 +9,7 @@ var a = {
 };
 
 OPTIONS:
-[null]
+[{}]
 
 ERRORS:
 [

test/prettier.js

@@ -31,8 +31,6 @@ ruleTester.run('prettier', rule, {
   valid: [
     // Correct style.
     { code: '"";\n' },
-    // Facebook style uses single quotes.
-    { code: `('');\n`, options: ['fb'] },
     // Single quote from .prettierrc.
     { code: `'';\n`, filename: getPrettierRcJsFilename('single-quote') },
     // Override .prettierrc from object option.
@@ -41,12 +39,6 @@ ruleTester.run('prettier', rule, {
       filename: getPrettierRcJsFilename('bracket-spacing'),
       options: [{ bracketSpacing: false }]
     },
-    // Override .prettierrc from facebook option.
-    {
-      code: `('');\n`,
-      filename: getPrettierRcJsFilename('double-quote'),
-      options: ['fb']
-    },
     // Only use options from plugin, skipping .prettierrc
     {
       code: `var foo = {bar: 0};\n`,