Class: Teapot::Graph

Inherits:
Object
  • Object
show all
Defined in:
lib/teapot/graph.rb

Defined Under Namespace

Classes: Extractor, Node

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Graph

Returns a new instance of Graph.



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# File 'lib/teapot/graph.rb', line 26

def initialize
  @nodes = {}
  
  @extractors = []
end

Instance Attribute Details

#extractors ⇒ Object (readonly)

Returns the value of attribute extractors.



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# File 'lib/teapot/graph.rb', line 34

def extractors
  @extractors
end

#nodes ⇒ Object (readonly)

Returns the value of attribute nodes.



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# File 'lib/teapot/graph.rb', line 33

def nodes
  @nodes
end

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/teapot/graph.rb', line 32

def root
  @root
end

Instance Method Details

#<<(node) ⇒ Object 



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# File 'lib/teapot/graph.rb', line 36

def << node
  @nodes[node.path] = node
end

#extract(source_path) ⇒ Object 



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# File 'lib/teapot/graph.rb', line 54

def extract(source_path)
  dependencies = Set.new

  @extractors.each do |extractor|
    extractor.call(source_path) do |path|
      dependencies << path
    end
  end

  nodes = dependencies.map{|path| fetch(path)}
end

#fetch(path) ⇒ Object 



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# File 'lib/teapot/graph.rb', line 66

def fetch(path)
  @nodes.fetch(path) do
    node = @nodes[path] = Node.new(self, path)
    node.extract_dependencies!
    
    node
  end
end

#regenerate?(output_path, input_paths) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/teapot/graph.rb', line 40

def regenerate?(output_path, input_paths)
  return true unless output_path.exist?

  output_modified_time = output_path.mtime

  Array(input_paths).each do |path|
    node = fetch(path)

    return true if node.changed_since?(output_modified_time)
  end

  return false
end