class Gem::AvailableSet Tuple = Struct.new(:spec, :source) def initialize @set = [] @sorted = nil end attr_reader :set def add(spec, source) @set << Tuple.new(spec, source) @sorted = nil self end def <<(o) case o when Gem::AvailableSet s = o.set when Array s = o.map do |sp,so| if !sp.kind_of?(Gem::Specification) or !so.kind_of?(Gem::Source) raise TypeError, "Array must be in [[spec, source], ...] form" end Tuple.new(sp,so) end else raise TypeError, "must be a Gem::AvailableSet" end @set += s @sorted = nil self end def empty? @set.empty? end def all_specs @set.map { |t| t.spec } end def match_platform! @set.reject! { |t| !Gem::Platform.match(t.spec.platform) } @sorted = nil self end def sorted @sorted ||= @set.sort do |a,b| i = b.spec <=> a.spec i != 0 ? i : (a.source <=> b.source) end end def size @set.size end def source_for(spec) f = @set.find { |t| t.spec == spec } f.source end def pick_best! return self if empty? @set = [sorted.first] @sorted = nil self end def remove_installed!(dep) @set.reject! do |t| # already locally installed Gem::Specification.any? do |installed_spec| dep.name == installed_spec.name and dep.requirement.satisfied_by? installed_spec.version end end @sorted = nil self end def inject_into_list(dep_list) @set.each { |t| dep_list.add t.spec } end end