From 2f54f66c594351bb03ea944a9b74cb46071bf495 Mon Sep 17 00:00:00 2001
From: Tom Adam <tomadam@instantiate.co.uk>
Date: Tue, 1 Apr 2014 15:21:58 +0100
Subject: [PATCH] Allow function for outFolder in dest

---
 lib/dest/index.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/dest/index.js b/lib/dest/index.js
index b2776191..fdff5f9d 100644
--- a/lib/dest/index.js
+++ b/lib/dest/index.js
@@ -7,17 +7,22 @@ var writeContents = require('./writeContents');
 var defaultMode = 0777 & (~process.umask());
 
 module.exports = function(outFolder, opt) {
-  if (typeof outFolder !== 'string') throw new Error('Invalid output folder');
-
   if (!opt) opt = {};
   if (!opt.cwd) opt.cwd = process.cwd();
   if (typeof opt.mode === 'string') opt.mode = parseInt(opt.mode, 8);
 
   var cwd = path.resolve(opt.cwd);
-  var basePath = path.resolve(cwd, outFolder);
   var folderMode = (opt.mode || defaultMode);
+  var basePath;
+
+  if (typeof outFolder === 'string') {
+    basePath = path.resolve(cwd, outFolder);
+  } else if (typeof outFolder !== 'function') {
+    throw new Error('Invalid output folder');
+  }
 
   function saveFile (file, cb) {
+    if (typeof outFolder === 'function') basePath = path.resolve(cwd, outFolder(file));
     var writePath = path.resolve(basePath, file.relative);
     var writeFolder = path.dirname(writePath);