Preserve keyword arguments across options and builders

lib/uber/builder.rb

@@ -16,6 +16,8 @@ def call(context, *args)
         context
       end
 
+      ruby2_keywords(:call) if respond_to?(:ruby2_keywords, true)
+
       def <<(proc)
         super Uber::Option[proc, instance_exec: true]
       end
@@ -36,6 +38,7 @@ module Build
       def build!(context, *args)
         builders.(context, *args)
       end
+      ruby2_keywords(:build!) if respond_to?(:ruby2_keywords, true)
     end
   end
 end

lib/uber/option.rb

@@ -4,13 +4,18 @@ module Uber
   class Option
     def self.[](value, options={}) # TODO: instance_exec: true
       if value.is_a?(Proc)
-        return ->(context, *args) { context.instance_exec(*args, &value) } if options[:instance_exec]
+        return value unless options[:instance_exec]
+        wrapper = ->(context, *args) { context.instance_exec(*args, &value) }
+      elsif value.is_a?(Uber::Callable)
         return value
+      elsif value.is_a?(Symbol)
+        wrapper = ->(context, *args){ context.send(value, *args) }
+      else
+        return ->(*) { value }
       end
 
-      return value                                            if value.is_a?(Uber::Callable)
-      return ->(context, *args){ context.send(value, *args) } if value.is_a?(Symbol)
-      ->(*) { value }
+      wrapper.ruby2_keywords if wrapper.respond_to?(:ruby2_keywords)
+      wrapper
     end
   end
 end

lib/uber/options.rb

@@ -25,6 +25,8 @@ def eval(key, *args)
       self[key].(*args)
     end
 
+    ruby2_keywords(:evaluate, :eval) if respond_to?(:ruby2_keywords, true)
+
   private
 
     # DEPRECATED! PLEASE USE UBER::OPTION.
@@ -46,6 +48,7 @@ def call(context, *args)
 
         evaluate_for(context, *args)
       end
+      ruby2_keywords(:call) if respond_to?(:ruby2_keywords, true)
       alias_method :evaluate, :call
 
       def dynamic?
@@ -88,6 +91,7 @@ def proc!(context, *args)
       def callable!(context, *args)
         @value.call(context, *args)
       end
+      ruby2_keywords(:evaluate_for, :method!, :proc!, :callable!) if respond_to?(:ruby2_keywords, true)
     end
   end
 end