From 9c7a18bdcb76630ba6649a90cbee020181eb382c Mon Sep 17 00:00:00 2001
From: Jack Nagel <jacknagel@gmail.com>
Date: Tue, 17 Sep 2013 21:25:40 -0500
Subject: [PATCH] Make spec-scoped resources override top-level resources

---
 Library/Homebrew/formula.rb                 |  4 ++-
 Library/Homebrew/software_spec.rb           |  6 ++++-
 Library/Homebrew/test/test_software_spec.rb | 29 +++++++++++++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index d0d2338804..6b14aba250 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -711,7 +711,9 @@ class Formula
 
     # Define a named resource using a SoftwareSpec style block
     def resource name, &block
-      specs.each { |spec| spec.resource(name, &block) }
+      specs.each do |spec|
+        spec.resource(name, &block) unless spec.resource?(name)
+      end
     end
 
     def dependencies
diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index eedbf47b4a..7b4004ecbb 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -23,9 +23,13 @@ class SoftwareSpec
     resources.each_value { |r| r.owner = owner }
   end
 
+  def resource? name
+    resources.has_key?(name)
+  end
+
   def resource name, &block
     if block_given?
-      raise DuplicateResourceError.new(name) if resources.has_key?(name)
+      raise DuplicateResourceError.new(name) if resource?(name)
       resources[name] = Resource.new(name, &block)
     else
       resources.fetch(name) { raise ResourceMissingError.new(owner, name) }
diff --git a/Library/Homebrew/test/test_software_spec.rb b/Library/Homebrew/test/test_software_spec.rb
index 7d67d90d3a..febd33b398 100644
--- a/Library/Homebrew/test/test_software_spec.rb
+++ b/Library/Homebrew/test/test_software_spec.rb
@@ -2,6 +2,35 @@ require 'testing_env'
 require 'software_spec'
 require 'bottles'
 
+class SoftwareSpecTests < Test::Unit::TestCase
+  def setup
+    @spec = SoftwareSpec.new
+  end
+
+  def test_resource
+    @spec.resource('foo') { url 'foo-1.0' }
+    assert @spec.resource?('foo')
+  end
+
+  def test_raises_when_duplicate_resources_are_defined
+    @spec.resource('foo') { url 'foo-1.0' }
+    assert_raises(DuplicateResourceError) do
+      @spec.resource('foo') { url 'foo-1.0' }
+    end
+  end
+
+  def test_raises_when_accessing_missing_resources
+    assert_raises(ResourceMissingError) { @spec.resource('foo') }
+  end
+
+  def test_resource_owner
+    owner = Object.new
+    @spec.resource('foo') { url 'foo-1.0' }
+    @spec.owner = owner
+    @spec.resources.each_value { |r| assert_equal owner, r.owner }
+  end
+end
+
 class HeadSoftwareSpecTests < Test::Unit::TestCase
   include VersionAssertions