Class: Build::Dependency::Visualization

Inherits:
Object
  • Object
show all
Defined in:
lib/build/dependency/visualization.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Visualization

Returns a new instance of Visualization.



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# File 'lib/build/dependency/visualization.rb', line 26

def initialize
	@base_attributes = {
		:shape => 'box',
		:style => 'filled',
		:fillcolor => 'white',
		:fontname => 'Monaco',
	}
	
	@provision_attributes = @base_attributes.dup
	
	@alias_attributes = @base_attributes.merge(
		:fillcolor => 'lightgrey',
	)
	
	@dependency_attributes = @base_attributes.merge(
		:fillcolor => 'orange',
	)
	
	@selection_attributes = {
		:fillcolor => 'lightbrown',
	}
	
	@private_edge_attributes = {
		:arrowhead => 'empty',
		:color => '#0000005f'
	}
	
	@provider_attributes = {
		:fillcolor => 'lightblue',
	}
	
	@provider_edge_attributes = {
		:arrowhead => 'none',
	}
end

Instance Attribute Details

#alias_attributes ⇒ Object (readonly)

Returns the value of attribute alias_attributes.



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# File 'lib/build/dependency/visualization.rb', line 68

def alias_attributes
  @alias_attributes
end

#base_attributes ⇒ Object (readonly)

Returns the value of attribute base_attributes.



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# File 'lib/build/dependency/visualization.rb', line 62

def base_attributes
  @base_attributes
end

#dependency_attributes ⇒ Object (readonly)

Returns the value of attribute dependency_attributes.



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# File 'lib/build/dependency/visualization.rb', line 70

def dependency_attributes
  @dependency_attributes
end

#private_edge_attributes ⇒ Object (readonly)

Returns the value of attribute private_edge_attributes.



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# File 'lib/build/dependency/visualization.rb', line 72

def private_edge_attributes
  @private_edge_attributes
end

#provider_attributes ⇒ Object (readonly)

Returns the value of attribute provider_attributes.



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# File 'lib/build/dependency/visualization.rb', line 65

def provider_attributes
  @provider_attributes
end

#provider_edge_attributes ⇒ Object (readonly)

Returns the value of attribute provider_edge_attributes.



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# File 'lib/build/dependency/visualization.rb', line 66

def provider_edge_attributes
  @provider_edge_attributes
end

#provision_attributes ⇒ Object (readonly)

Returns the value of attribute provision_attributes.



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# File 'lib/build/dependency/visualization.rb', line 63

def provision_attributes
  @provision_attributes
end

#selection_attributes ⇒ Object (readonly)

Returns the value of attribute selection_attributes.



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# File 'lib/build/dependency/visualization.rb', line 71

def selection_attributes
  @selection_attributes
end

Instance Method Details

#generate(chain) ⇒ Object 



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# File 'lib/build/dependency/visualization.rb', line 74

def generate(chain)
	graph = Graphviz::Graph.new
	graph.attributes[:ratio] = :auto
	
	dependencies = dependencies_by_name(chain.dependencies)
	
	chain.ordered.each do |resolution|
		provider = resolution.provider
		name = provider.name
		
		# Provider is the dependency that provides the dependency referred to by name.
		node = graph.add_node(name.to_s, @base_attributes.dup)
		
		if dependencies.include?(resolution.dependency.name)
			node.attributes.update(@dependency_attributes)
		elsif chain.selection.include?(provider.name)
			node.attributes.update(@selection_attributes)
		end
		
		# A provision has dependencies...
		provider.dependencies.each do |dependency|
			if dependency_node = graph.nodes[dependency.name.to_s]
				edge = node.connect(dependency_node)
				
				if dependency.private?
					edge.attributes.update(@private_edge_attributes)
				end
			end
		end
		
		# A provision provides other provisions...
		provider.provisions.each do |provision_name, provision|
			next if name == provision_name
			
			provides_node = graph.nodes[provision_name.to_s] || graph.add_node(provision_name.to_s, @provision_attributes)
			
			if provision.alias?
				provides_node.attributes = @alias_attributes
			end
			
			node.attributes.update(@provider_attributes)
			
			unless provides_node.connected?(node)
				edge = provides_node.connect(node)
				
				edge.attributes.update(@provider_edge_attributes)
			end
		end
	end
	
	chain.provisions.each do |provision|
		node = graph.nodes[provision.name.to_s]
		
		node.attributes.update(penwidth: 2.0)
	end
	
	# Put all dependencies at the same level so as to not make the graph too confusingraph.
	done = Set.new
	chain.ordered.each do |resolution|
		provider = resolution.provider
		name = "subgraph-#{provider.name}"
		
		subgraph = graph.nodes[name] || graph.add_subgraph(name, :rank => :same)
		
		provider.dependencies.each do |dependency|
			next if done.include? dependency
			
			done << dependency
			
			if dependency_node = graph.nodes[dependency.name.to_s]
				subgraph.add_node(dependency_node.name)
			end
		end
	end
	
	return graph
end