Class SemanticPuppet::Dependency::Graph
In: lib/semantic_puppet/dependency/graph.rb
Parent: Object

Methods

add_graph_constraint   new   satisfies_graph?  

Included Modules

GraphNode

Attributes

modules  [R] 

Public Class methods

new(modules = {})

Create a new instance of a dependency graph.

@param modules [{String => VersionRange}] the required module 

       set and their version constraints

Public Instance methods

add_graph_constraint(source, &block)

Constrains graph solutions based on the given block. Graph constraints are used to describe fundamental truths about the tooling or module system (e.g.: module names contain a namespace component which is dropped during install, so module names must be unique excluding the namespace).

@example Ensuring a single source for all modules 

    @graph.add_constraint('installed', mod.name) do |nodes|
      nodes.count { |node| node.source } == 1
    end

@see considering_solution?

@param source [String, Symbol] a name describing the source of the 

              constraint

@yieldparam nodes [Array<GraphNode>] the nodes to test the constraint 

            against

@yieldreturn [Boolean] whether the node passed the constraint @return [void]

satisfies_graph?(solution)

Checks the proposed solution (or partial solution) against the graph‘s constraints.

@see add_graph_constraint

@return [Boolean] true if none of the graph constraints are violated

[Validate]