From d4b9004647b68e456d0d978c29ce2d0e9b87b33c Mon Sep 17 00:00:00 2001
From: Michael Melvin <michael.melvin@panasonic.aero>
Date: Fri, 12 Jun 2015 16:50:37 -0700
Subject: [PATCH] Skip missing optional imports

---
 lib/less/visitors/import-visitor.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/less/visitors/import-visitor.js b/lib/less/visitors/import-visitor.js
index e643117c..8af0b892 100644
--- a/lib/less/visitors/import-visitor.js
+++ b/lib/less/visitors/import-visitor.js
@@ -104,6 +104,7 @@ ImportVisitor.prototype = {
         var importVisitor = this,
             inlineCSS = importNode.options.inline,
             isPlugin = importNode.options.plugin,
+            isOptional = importNode.options.optional,
             duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;
 
         if (!context.importMultiple) {
@@ -120,6 +121,10 @@ ImportVisitor.prototype = {
             }
         }
 
+        if (!fullPath && isOptional) {
+            importNode.skip = true;
+        }
+
         if (root) {
             importNode.root = root;
             importNode.importedFilename = fullPath;