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Contents
module Vagrant
module Util
# Represents the "stacked proc runner" behavior which is used a
# couple places within Vagrant. This allows procs to "stack" on
# each other, then all execute in a single action. An example of
# its uses can be seen in the {Config} class.
module StackedProcRunner
# Returns the proc stack. This should always be called as the
# accessor of the stack. The instance variable itself should _never_
# be used.
#
# @return [Array<Proc>]
def proc_stack
@_proc_stack ||= []
end
# Adds (pushes) a proc to the stack. The actual proc added here is
# not executed, but merely stored.
#
# @param [Proc] block
def push_proc(&block)
proc_stack << block
end
# Executes all the procs on the stack, passing in the given arguments.
# The stack is not cleared afterwards. It is up to the user of this
# mixin to clear the stack by calling `proc_stack.clear`.
def run_procs!(*args)
proc_stack.each do |proc|
proc.call(*args)
end
end
end
end
end
Version data entries
31 entries across 27 versions & 4 rubygems