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Size: 1.19 KB
Versions: 11
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Stored size: 1.19 KB
Contents
module Nanoc::Int
# @api private
class DependencyTracker
def initialize(dependency_store)
@dependency_store = dependency_store
end
# Record dependencies for the duration of the block.
#
# @return [void]
def run
unless block_given?
raise ArgumentError, 'No block given'
end
stack = []
start_tracking(stack)
yield
ensure
stop_tracking(stack)
end
# @api private
def start_tracking(stack)
Nanoc::Int::NotificationCenter.on(:visit_started, self) do |obj|
unless stack.empty?
Nanoc::Int::NotificationCenter.post(:dependency_created, stack.last, obj)
@dependency_store.record_dependency(stack.last, obj)
end
stack.push(obj)
end
Nanoc::Int::NotificationCenter.on(:visit_ended, self) do |_obj|
stack.pop
end
end
# @api private
def stop_tracking(stack)
unless stack.empty?
raise 'Internal inconsistency: dependency tracker stack not empty at end of compilation'
end
Nanoc::Int::NotificationCenter.remove(:visit_started, self)
Nanoc::Int::NotificationCenter.remove(:visit_ended, self)
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems