54 lines
1.3 KiB
Ruby
54 lines
1.3 KiB
Ruby
module Rails
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module Generator
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# Manifest captures the actions a generator performs. Instantiate
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# a manifest with an optional target object, hammer it with actions,
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# then replay or rewind on the object of your choice.
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#
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# Example:
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# manifest = Manifest.new { |m|
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# m.make_directory '/foo'
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# m.create_file '/foo/bar.txt'
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# }
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# manifest.replay(creator)
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# manifest.rewind(destroyer)
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class Manifest
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attr_reader :target
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# Take a default action target. Yield self if block given.
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def initialize(target = nil)
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@target, @actions = target, []
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yield self if block_given?
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end
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# Record an action.
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def method_missing(action, *args, &block)
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@actions << [action, args, block]
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end
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# Replay recorded actions.
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def replay(target = nil)
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send_actions(target || @target, @actions)
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end
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# Rewind recorded actions.
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def rewind(target = nil)
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send_actions(target || @target, @actions.reverse)
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end
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# Erase recorded actions.
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def erase
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@actions = []
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end
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private
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def send_actions(target, actions)
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actions.each do |method, args, block|
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target.send(method, *args, &block)
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end
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end
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end
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end
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end
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