From 517b0353bc96971ee7ceda2287a79afeb8230c47 Mon Sep 17 00:00:00 2001
From: Eric Lippmann <eric.lippmann@icinga.com>
Date: Thu, 2 Dec 2021 15:37:56 +0100
Subject: [PATCH] Support variable variables

---
 library/Icinga/Less/ColorPropOrVariable.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/library/Icinga/Less/ColorPropOrVariable.php b/library/Icinga/Less/ColorPropOrVariable.php
index 2eb21a24b..f401b2ab2 100644
--- a/library/Icinga/Less/ColorPropOrVariable.php
+++ b/library/Icinga/Less/ColorPropOrVariable.php
@@ -36,6 +36,14 @@ class ColorPropOrVariable extends Less_Tree
     public function compile($env)
     {
         $v = $this->getVariable();
+
+        if ($v->name[1] === '@') {
+            // Evaluate variable variable as in Less_Tree_Variable:28
+            $vv = new Less_Tree_Variable(substr($v->name, 1), $v->index + 1, $v->currentFileInfo);
+            // Overwrite the name so that the variable variable is not evaluated again
+            $v->name = '@' . $vv->compile($env)->value;
+        }
+
         $compiled = $v->compile($env);
 
         if ($compiled instanceof ColorProp) {