Update eslintFormatter for eslint-webpack-plugin

Author: mrmckeb

packages/react-dev-utils/eslintFormatter.js

@@ -7,17 +7,24 @@
 
 'use strict';
 
+const path = require('path');
 const chalk = require('chalk');
 const stripAnsi = require('strip-ansi');
 const table = require('text-table');
 
+const cwd = process.cwd();
+
 function isError(message) {
   if (message.fatal || message.severity === 2) {
     return true;
   }
   return false;
 }
 
+function getRelativePath(filePath) {
+  return path.relative(cwd, filePath);
+}
+
 function formatter(results) {
   let output = '\n';
   let hasErrors = false;
@@ -73,6 +80,10 @@ function formatter(results) {
       },
     });
 
+    // print the filename and relative path
+    output += `${getRelativePath(result.filePath)}\n`;
+
+    // print the errors
     output += `${outputTable}\n\n`;
   });