Enforce Prettier for @format

Reviewed By: zertosh

Differential Revision: D5392376

fbshipit-source-id: 6f09a4d8f4542c3a74aadb8d62fd216529a4f2bc

.eslintrc

@@ -1,6 +1,6 @@
 {
   "root": true,
-  
+
   "parser": "babel-eslint",
 
   "ecmaFeatures": {
@@ -14,6 +14,7 @@
 
   "plugins": [
     "flowtype",
+    "prettier",
     "react"
   ],
 
@@ -163,6 +164,10 @@
     "no-restricted-modules": 1,      // restrict usage of specified node modules (off by default)
     "no-sync": 0,                    // disallow use of synchronous methods (off by default)
 
+  // Prettier Plugin
+  // https://github.com/prettier/eslint-plugin-prettier
+    "prettier/prettier": [2, "fb", "@format"],
+
   // Stylistic Issues
   // These rules are purely matters of style and are quite subjective.
 

Libraries/Lists/__flowtests__/FlatList-flowtest.js

@@ -60,9 +60,13 @@ module.exports = {
     ];
     return (
       <FlatList
-        renderItem={(
-          info, // $FlowExpectedError - bad widgetCount type 6, should be Object
-        ) => <span>{info.item.widget.missingProp}</span>}
+        renderItem={info =>
+          <span>
+            {
+              // $FlowExpectedError - bad widgetCount type 6, should be Object
+              info.item.widget.missingProp
+            }
+          </span>}
         data={data}
       />
     );

package.json

@@ -225,12 +225,14 @@
     "eslint-config-fbjs": "^1.1.1",
     "eslint-plugin-babel": "^4.1.1",
     "eslint-plugin-flowtype": "^2.33.0",
+    "eslint-plugin-prettier": "2.1.1",
     "eslint-plugin-react": "^7.0.1",
     "flow-bin": "^0.49.1",
     "jest": "20.1.0-alpha.3",
     "jest-repl": "20.1.0-alpha.3",
     "jest-runtime": "20.1.0-alpha.3",
     "mock-fs": "^4.4.1",
+    "prettier": "1.5.2",
     "react": "16.0.0-alpha.12",
     "react-test-renderer": "16.0.0-alpha.12",
     "shelljs": "0.6.0",