Merge pull request #72 from joelparsons/fix_cocoapods_1721

Fixes exception when git tag is a Version

lib/cocoapods-core/specification/linter.rb

@@ -312,10 +312,9 @@ def _validate_source(s)
           if commit && commit.downcase =~ /head/
             error 'The commit of a Git source cannot be `HEAD`.'
           end
-          if tag && !tag.include?(version)
+          if tag && !tag.to_s.include?(version)
             warning 'The version should be included in the Git tag.'
           end
-
           if version == '0.0.1'
             if commit.nil? && tag.nil?
               error 'Git sources should specify either a commit or a tag.'

spec/specification/linter_spec.rb

@@ -254,11 +254,17 @@ def message_should_include(*values)
         message_should_include('source', 'HEAD')
       end
 
-      it "checks that the version is included in the git tag" do
+      it "checks that the version is included in the git tag when the version is a string" do
         @spec.stubs(:version).returns(Version.new '1.0.1')
         @spec.stubs(:source).returns({ :git => 'http://repo.git', :tag => '1.0' })
         message_should_include('git', 'version', 'tag')
       end
+
+      it "checks that the version is included in the git tag  when the version is a Version" do
+        @spec.stubs(:version).returns(Version.new '1.0.1')
+        @spec.stubs(:source).returns({ :git => 'http://repo.git', :tag => (Version.new '1.0') })
+        message_should_include('git', 'version', 'tag')
+      end
 
       it "checks that Github repositories use the `https` form (for compatibility)" do
         @spec.stubs(:source).returns({ :git => 'http://github.com/repo.git', :tag => '1.0' })