Method: Lyp::DependencyResolver#filter_invalid_permutations

Defined in:
lib/lyp/resolver.rb

#filter_invalid_permutations(permutations) ⇒ Object

Remove invalid permutations, that is permutations that contain multiple versions of the same package, a scenario which could arrive in the case of circular dependencies, or when different dependencies rely on different versions of the same transitive dependency.



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# File 'lib/lyp/resolver.rb', line 330

def filter_invalid_permutations(permutations)
  valid = []
  permutations.each do |perm|
    versions = {}; invalid = false
    perm.each do |ref|
      if ref =~ /(.+)@(.+)/
        name, version = $1, $2
        if versions[name] && versions[name] != version
          invalid = true
          break
        else
          versions[name] = version
        end
      end
    end
    valid << perm.uniq unless invalid
  end

  valid
end