From c94a6bde53f292e46a0ad3a060aa4d7d4f10ed02 Mon Sep 17 00:00:00 2001
From: zepumph <michael.kauzmann@colorado.edu>
Date: Thu, 18 Feb 2021 21:10:39 -0900
Subject: [PATCH] Create --format option to lint,
 https://github.com/phetsims/phet-info/issues/150

---
 js/grunt/lint.js | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/js/grunt/lint.js b/js/grunt/lint.js
index a5e645b1..d3697451 100644
--- a/js/grunt/lint.js
+++ b/js/grunt/lint.js
@@ -41,6 +41,7 @@ const lint = async ( patterns, options ) => {
 
   options = _.assignIn( {
     cache: true,
+    format: false, // Use a separate set of rules purely for formatting code.
     fix: false, // whether fixes should be written to disk
     warn: true // whether errors should reported with grunt.warn
   }, options );
@@ -51,7 +52,7 @@ const lint = async ( patterns, options ) => {
                                          fs.existsSync( pattern ) );
 
   // 1. Create an instance with the `fix` option.
-  const eslint = new ESLint( {
+  const eslintConfig = {
 
     // optional auto-fix
     fix: options.fix,
@@ -70,7 +71,15 @@ const lint = async ( patterns, options ) => {
 
     // Our custom rules live here
     rulePaths: [ '../chipper/eslint/rules' ]
-  } );
+  };
+
+  if ( options.format ) {
+    eslintConfig.baseConfig = {
+      extends: [ '../chipper/eslint/format_eslintrc.js' ]
+    };
+  }
+
+  const eslint = new ESLint( eslintConfig );
 
   grunt.verbose.writeln( `linting: ${patterns.join( ', ' )}` );