35 lines
1.1 KiB
Ruby
35 lines
1.1 KiB
Ruby
module Vagrant
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module Util
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# Represents the "stacked proc runner" behavior which is used a
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# couple places within Vagrant. This allows procs to "stack" on
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# each other, then all execute in a single action. An example of
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# its uses can be seen in the {Config} class.
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module StackedProcRunner
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# Returns the proc stack. This should always be called as the
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# accessor of the stack. The instance variable itself should _never_
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# be used.
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#
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# @return [Array<Proc>]
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def proc_stack
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@_proc_stack ||= []
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end
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# Adds (pushes) a proc to the stack. The actual proc added here is
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# not executed, but merely stored.
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#
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# @param [Proc] block
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def push_proc(&block)
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proc_stack << block
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end
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# Executes all the procs on the stack, passing in the given arguments.
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# The stack is not cleared afterwards. It is up to the user of this
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# mixin to clear the stack by calling `proc_stack.clear`.
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def run_procs!(*args)
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proc_stack.each do |proc|
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proc.call(*args)
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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 |