45 lines
1.3 KiB
Ruby
45 lines
1.3 KiB
Ruby
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module Rails
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module Generator
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# A spec knows where a generator was found and how to instantiate it.
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# Metadata include the generator's name, its base path, and the source
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# which yielded it (PathSource, GemSource, etc.)
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class Spec
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attr_reader :name, :path, :source
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def initialize(name, path, source)
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@name, @path, @source = name, path, source
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end
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# Look up the generator class. Require its class file, find the class
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# in ObjectSpace, tag it with this spec, and return.
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def klass
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unless @klass
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require class_file
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@klass = lookup_class
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@klass.spec = self
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end
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@klass
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end
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def class_file
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"#{path}/#{name}_generator.rb"
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end
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def class_name
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"#{name.camelize}Generator"
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end
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private
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# Search for the first Class descending from Rails::Generator::Base
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# whose name matches the requested class name.
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def lookup_class
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ObjectSpace.each_object(Class) do |obj|
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return obj if obj.ancestors.include?(Rails::Generator::Base) and
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obj.name.split('::').last == class_name
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end
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raise NameError, "Missing #{class_name} class in #{class_file}"
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end
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end
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end
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end
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