From 62c0a391b41d64b5c7634e2ebfa4a0415a3c9aa4 Mon Sep 17 00:00:00 2001
From: Jack Nagel
Date: Wed, 31 Dec 2014 10:37:29 -0500
Subject: Don't attempt to detect version if URL is not set

---
 Library/Homebrew/resource.rb           | 2 ++
 Library/Homebrew/test/test_resource.rb | 4 ++++
 2 files changed, 6 insertions(+)

(limited to 'Library')

diff --git a/Library/Homebrew/resource.rb b/Library/Homebrew/resource.rb
index 573a7bcb1..0b30d72ad 100644
--- a/Library/Homebrew/resource.rb
+++ b/Library/Homebrew/resource.rb
@@ -148,6 +148,8 @@ class Resource
   private
 
   def detect_version(val)
+    return if val.nil? && url.nil?
+
     case val
     when nil     then Version.detect(url, specs)
     when String  then Version.new(val)
diff --git a/Library/Homebrew/test/test_resource.rb b/Library/Homebrew/test/test_resource.rb
index e5cb288d2..245bc1789 100644
--- a/Library/Homebrew/test/test_resource.rb
+++ b/Library/Homebrew/test/test_resource.rb
@@ -81,6 +81,10 @@ class ResourceTests < Homebrew::TestCase
     assert_raises(TypeError) { @resource.version(Object.new) }
   end
 
+  def test_version_when_url_is_not_set
+    assert_nil @resource.version
+  end
+
   def test_mirrors
     assert_empty @resource.mirrors
     @resource.mirror('foo')
-- 
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