From 2d29046f12180c00f66539a99b0328140d9fa711 Mon Sep 17 00:00:00 2001
From: Sam Thursfield <sam.thursfield@codethink.co.uk>
Date: Tue, 2 Dec 2014 15:37:10 +0000
Subject: [PATCH] Fix Rakefile when RVM is not installed

This fixes https://github.com/jimweirich/builder/issues/51
---
 rakelib/tags.rake | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/rakelib/tags.rake b/rakelib/tags.rake
index 93b47df..b614a17 100644
--- a/rakelib/tags.rake
+++ b/rakelib/tags.rake
@@ -12,8 +12,13 @@ module Tags
 
   PROJECT_DIR = ['.']
 
-  RVM_GEMDIR = File.join(`rvm gemdir`.strip, "gems")
-  SYSTEM_DIRS = File.exists?(RVM_GEMDIR) ? RVM_GEMDIR : []
+  RVM = `which rvm`
+  if File.exists?(RVM)
+    RVM_GEMDIR = File.join(`rvm gemdir`.strip, "gems")
+    SYSTEM_DIRS = File.exists?(RVM_GEMDIR) ? RVM_GEMDIR : []
+  else
+    SYSTEM_DIRS = []
+  end
 
   module_function