1 files changed, 45 insertions, 0 deletions
diff --git a/lib/chef/cookbook/cookbook_collection.rb b/lib/chef/cookbook/cookbook_collection.rb
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+++ b/lib/chef/cookbook/cookbook_collection.rb
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+#--
+# Author:: Tim Hinderliter (<tim@opscode.com>)
+# Author:: Christopher Walters (<cw@opscode.com>)
+# Copyright:: Copyright (c) 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/mash'
+
+class Chef
+  # == Chef::CookbookCollection
+  # This class is the consistent interface for a node to obtain its
+  # cookbooks by name.
+  #
+  # This class is basically a glorified Hash, but since there are
+  # several ways this cookbook information is collected,
+  # (e.g. CookbookLoader for solo, hash of auto-vivified Cookbook
+  # objects for lazily-loaded remote cookbooks), it gets transformed
+  # into this.
+  class CookbookCollection < Mash
+
+    # The input is a mapping of cookbook name to CookbookVersion objects. We
+    # simply extract them
+    def initialize(cookbook_versions={})
+      super() do |hash, key|
+        raise Chef::Exceptions::CookbookNotFound, "Cookbook #{key} not found. " <<
+          "If you're loading #{key} from another cookbook, make sure you configure the dependency in your metadata"
+      end
+      cookbook_versions.each{ |cookbook_name, cookbook_version| self[cookbook_name] = cookbook_version }
+    end
+
+  end
+end