Class: ElmInstall::Resolver

Inherits:
Base
  • Object
show all
Defined in:
lib/elm_install/resolver.rb

Overview

Resolves dependencies

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(identifier) ⇒ Resolver

Initializes a resolver

Parameters:



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# File 'lib/elm_install/resolver.rb', line 13

def initialize(identifier)
  @graph = Solve::Graph.new
  @identifier = identifier
  @dependencies = {}
  self
end

Instance Attribute Details

#dependencies ⇒ Array<Dependency> (readonly)

Returns The dependencies.

Returns:



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# File 'lib/elm_install/resolver.rb', line 5

def dependencies
  @dependencies
end

Instance Method Details

#resolve ⇒ Solve::Graph

Resolves the constraints for a version

Returns:

  • (Solve::Graph) —

    Returns the graph



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# File 'lib/elm_install/resolver.rb', line 24

def resolve
  @identifier.initial_dependencies.each do |dependency|
    resolve_dependency dependency
  end

  @graph
end

#resolve_dependencies(main, version) ⇒ Object

Resolves the dependencies of a dependency and version

Parameters:

Returns:

  • nil



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# File 'lib/elm_install/resolver.rb', line 60

def resolve_dependencies(main, version)
  dependencies = @identifier.identify(main.source.fetch(version))
  artifact = @graph.artifact main.name, version

  dependencies.each do |dependency|
    dependency.constraints.each do |constraint|
      artifact.depends dependency.name, constraint
    end

    resolve_dependency dependency
  end

  nil
end

#resolve_dependency(dependency) ⇒ Object

Resolves the dependencies of a dependency

Parameters:

Returns:

  • nil



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# File 'lib/elm_install/resolver.rb', line 38

def resolve_dependency(dependency)
  return if @dependencies[dependency.name]

  @dependencies[dependency.name] ||= dependency

  dependency
    .source
    .versions(dependency.constraints)
    .each do |version|
      resolve_dependencies(dependency, version)
    end

  nil
end