Class: Pallets::Graph

Inherits:
Object
  • Object
show all
Includes:
TSort
Defined in:
lib/pallets/graph.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Graph

Returns a new instance of Graph.



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# File 'lib/pallets/graph.rb', line 7

def initialize
  @nodes = {}
end

Instance Method Details

#add(node, dependencies) ⇒ Object

Raises:



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# File 'lib/pallets/graph.rb', line 11

def add(node, dependencies)
  raise WorkflowError, "Task #{node} is already defined in this workflow. "\
                       "Use `task '#{node}', as: 'FooBar'` to define an "\
                       "alias and reuse task" if nodes.key?(node)

  nodes[node] = dependencies
end

#each ⇒ Object 



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# File 'lib/pallets/graph.rb', line 27

def each
  return enum_for(__method__) unless block_given?

  tsort_each do |node|
    yield(node, parents(node))
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pallets/graph.rb', line 23

def empty?
  nodes.empty?
end

#parents(node) ⇒ Object 



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# File 'lib/pallets/graph.rb', line 19

def parents(node)
  nodes[node]
end