get functions.js working

lib/less/functions.js

@@ -1,9 +1,11 @@
-functions = {
+if (typeof(window) === 'undefined') { var tree = require(require('path').join(__dirname, '..', 'less', 'tree')); }
+
+tree.functions = {
     rgb: function (r, g, b) {
         return this.rgba(r, g, b, 1.0);
     },
     rgba: function (r, g, b, a) {
-        return new(node.Color)([r, g, b, a]);
+        return new(tree.Color)([r, g, b, a]);
     },
     hsl: function (h, s, l) {
         return this.hsla(h, s, l, 1.0);
@@ -23,3 +25,4 @@ functions = {
         }
     }
 };
+

lib/less/node/call.js

@@ -6,6 +6,6 @@ tree.Call = function Call(name, args) {
 };
 tree.Call.prototype = {
     toCSS: function (context, env) {
-        return that.functions[this.name].apply(functions, this.args).toCSS();
+        return tree.functions[this.name].apply(tree.functions, this.args).toCSS();
     }
 };

lib/less/tree.js

@@ -1,6 +1,8 @@
 var path = require('path');
 var tree = exports;
 
+require.paths.unshift(__dirname);
+
 ['color',    'directive', 'operation',  'dimension',
  'keyword',  'variable',  'ruleset',    'element',
  'selector', 'quoted',    'expression', 'rule',
@@ -9,6 +11,8 @@ var tree = exports;
     process.mixin(tree, require(path.join('less', 'node', n)));
 });
 
+require('functions');
+
 tree.operate = function (op, a, b) {
     switch (op) {
         case '+': return a + b;