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.
The input is a mapping of cookbook name to CookbookVersion objects. We simply extract them
# File lib/chef/cookbook/cookbook_collection.rb, line 36 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
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