Fail loudly when the gem installer finds conflicting gem requirements

Signed-off-by: Ole Claussen <claussen.ole@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/chef/exceptions.rb b/lib/chef/exceptions.rb
index a09a3a062c..1f4f5c595b 100644
--- a/lib/chef/exceptions.rb
+++ b/lib/chef/exceptions.rb
@@ -521,5 +521,11 @@ This error is most often caused by network issues (proxies, etc) outside of chef
 
     # exception specific to invalid usage of 'dsc_resource' resource
     class DSCModuleNameMissing < ArgumentError; end
+
+    class GemRequirementConflict < RuntimeError
+      def initialize(gem_name, option, value1, value2)
+        super "Conflicting requirements for gem '#{gem_name}': Both #{value1.inspect} and #{value2.inspect} given for option #{option.inspect}"
+      end
+    end
   end
 end