suppress rubygems deprecations during artifice setup

spec/support/artifice/endpoint.rb

@@ -12,23 +12,36 @@
 
 class Endpoint < Sinatra::Base
 
+  if defined? ::Deprecate
+    Deprecate = ::Deprecate
+  elsif defined? Gem::Deprecate
+    Deprecate = Gem::Deprecate
+  else
+    class Deprecate
+      def skip_during; yield; end
+    end
+  end
+
   helpers do
     def dependencies_for(gem_names, marshal = gem_repo1("Marshal.4.8"))
       require 'rubygems'
-      Marshal.load(File.open(marshal).read).map do |gem, spec|
-        if gem_names.include?(spec.name)
-          {
-            :name         => spec.name,
-            :number       => spec.version.version,
-            :platform     => spec.platform.to_s,
-            :dependencies => spec.dependencies.select {|dep| dep.type == :runtime }.map do |dep|
-              [dep.name, dep.requirement.requirements.map {|a| a.join(" ") }.join(", ")]
-            end
-          }
-        end
-      end.compact
-    end
-  end
+      gems = Deprecate.skip_during do
+        Marshal.load(File.open(marshal).read).map do |gem, spec|
+          if gem_names.include?(spec.name)
+            {
+              :name         => spec.name,
+              :number       => spec.version.version,
+              :platform     => spec.platform.to_s,
+              :dependencies => spec.dependencies.select {|dep| dep.type == :runtime }.map do |dep|
+                [dep.name, dep.requirement.requirements.map {|a| a.join(" ") }.join(", ")]
+              end
+            }
+          end
+        end # Marshal.load
+      end # Deprecate.skip_during
+      gems.compact
+    end # def dependencies_for
+  end # helpers
 
   get "/quick/Marshal.4.8/:id" do
     redirect "/fetch/actual/gem/#{params[:id]}"