class Bundler::Resolver::SpecGroup

def ==(other)
  sorted_spec_names == other.sorted_spec_names
end

def __dependencies(spec)
  dependencies = []
  spec.dependencies.each do |dep|
    next if dep.type == :development
    dependencies << Dependency.new(dep.name, dep.requirement)
  end
  dependencies
end

def dependencies
  @dependencies ||= @specs.map do |spec|
    __dependencies(spec) + metadata_dependencies(spec)
  end.flatten.uniq.sort
end

def empty?
  @specs.empty?
end

def equivalent?(other)
  name == other.name && version == other.version && source == other.source && dependencies == other.dependencies
end

def exemplary_spec
  @specs.first
end

def initialize(specs)
  @specs = specs
end

def merge(other)
  return false unless equivalent?(other)
  @specs |= other.specs
  true
end

def metadata_dependencies(spec)
  [
    metadata_dependency("Ruby", spec.required_ruby_version),
    metadata_dependency("RubyGems", spec.required_rubygems_version),
  ].compact
end

def metadata_dependency(name, requirement)
  return if requirement.nil? || requirement.none?
  Dependency.new("#{name}\0", requirement)
end

def name
  @name ||= exemplary_spec.name
end

def sorted_spec_names
  @specs.map(&:full_name).sort
end

def source
  @source ||= exemplary_spec.source
end

def to_s
  sorted_spec_names.join(", ")
end

def to_specs(force_ruby_platform)
  @specs.map do |s|
    lazy_spec = LazySpecification.from_spec(s)
    lazy_spec.force_ruby_platform = force_ruby_platform
    lazy_spec
  end
end

def version
  @version ||= exemplary_spec.version
end