1 files changed, 68 insertions, 0 deletions
diff --git a/lib/chef/run_list/versioned_recipe_list.rb b/lib/chef/run_list/versioned_recipe_list.rb
new file mode 100644
index 0000000000..0eefded964
--- /dev/null
+++ b/lib/chef/run_list/versioned_recipe_list.rb
@@ -0,0 +1,68 @@
+#
+# Author:: Stephen Delano (<stephen@opscode.com>)
+# Author:: Seth Falcon (<seth@opscode.com>)
+# Copyright:: Copyright 2010 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+require 'chef/version_class'
+require 'chef/version_constraint'
+
+# Why does this class exist?
+# Why did we not just modify RunList/RunListItem?
+class Chef
+  class RunList
+    class VersionedRecipeList < Array
+
+      def initialize
+        super
+        @versions = Hash.new
+      end
+
+      def add_recipe(name, version=nil)
+        if version && @versions.has_key?(name)
+          unless Chef::Version.new(@versions[name]) == Chef::Version.new(version)
+            raise Chef::Exceptions::CookbookVersionConflict, "Run list requires #{name} at versions #{@versions[name]} and #{version}"
+          end
+        end
+        @versions[name] = version if version
+        self << name unless self.include?(name)
+      end
+
+      def with_versions
+        self.map {|recipe_name| {:name => recipe_name, :version => @versions[recipe_name]}}
+      end
+
+      # Return an Array of Hashes, each of the form:
+      #  {:name => RECIPE_NAME, :version_constraint => Chef::VersionConstraint }
+      def with_version_constraints
+        self.map do |recipe_name|
+          constraint = Chef::VersionConstraint.new(@versions[recipe_name])
+          { :name => recipe_name, :version_constraint => constraint }
+        end
+      end
+
+      # Return an Array of Strings, each of the form:
+      #  "NAME@VERSION"
+      def with_version_constraints_strings
+        self.map do |recipe_name|
+          if @versions[recipe_name]
+            "#{recipe_name}@#{@versions[recipe_name]}"
+          else
+            recipe_name
+          end
+        end
+      end
+    end
+  end
+end