Method: Build::Graph::Walker#wait_for_children

Defined in:
lib/build/graph/walker.rb

#wait_for_children(parent, children) ⇒ Object

A parent task only completes once all it’s children are complete.



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# File 'lib/build/graph/walker.rb', line 121

def wait_for_children(parent, children)
  # Consider only incomplete/failed children:
  children = children.select{|child| !child.complete?}
  
  # If there are no children like this, then done:
  return true if children.size == 0
  
  # Otherwise, construct an edge to track state changes:
  edge = Edge.new
  
  children.each do |child|
    if child.failed?
      edge.skip!(child)
    else
      # We are waiting for this child to finish:
      edge.increment!
      
      @parents[child.node] ||= []
      @parents[child.node] << edge
    end
  end
  
  return edge.wait
end