class Gem::AvailableSet

# File lib/rubygems/available_set.rb, line 9
def initialize
  @set = []
  @sorted = nil
  @remote = true
end

# File lib/rubygems/available_set.rb, line 23
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

# File lib/rubygems/available_set.rb, line 17
def add(spec, source)
  @set << Tuple.new(spec, source)
  @sorted = nil
  self
end

# File lib/rubygems/available_set.rb, line 71
def all_specs
  @set.map { |t| t.spec }
end

# File lib/rubygems/available_set.rb, line 48
def each
  return enum_for __method__ unless block_given?

  @set.each do |tuple|
    yield tuple
  end
end

# File lib/rubygems/available_set.rb, line 59
def each_spec
  return enum_for __method__ unless block_given?

  each do |tuple|
    yield tuple.spec
  end
end

# File lib/rubygems/available_set.rb, line 67
def empty?
  @set.empty?
end

# File lib/rubygems/available_set.rb, line 125
def find_all(req)
  dep = req.dependency

  match = @set.find_all do |t|
    dep.matches_spec? t.spec
  end

  match.map do |t|
    Gem::Resolver::LocalSpecification.new(self, t.spec, t.source)
  end
end

# File lib/rubygems/available_set.rb, line 161
def inject_into_list(dep_list)
  @set.each { |t| dep_list.add t.spec }
end

# File lib/rubygems/available_set.rb, line 75
def match_platform!
  @set.reject! { |t| !Gem::Platform.match(t.spec.platform) }
  @sorted = nil
  self
end

# File lib/rubygems/available_set.rb, line 140
def pick_best!
  return self if empty?

  @set = [sorted.first]
  @sorted = nil
  self
end

# File lib/rubygems/available_set.rb, line 137
def prefetch(reqs)
end

# File lib/rubygems/available_set.rb, line 148
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

# File lib/rubygems/available_set.rb, line 88
def size
  @set.size
end

# File lib/rubygems/available_set.rb, line 81
def sorted
  @sorted ||= @set.sort do |a,b|
    i = b.spec <=> a.spec
    i != 0 ? i : (a.source <=> b.source)
  end
end

# File lib/rubygems/available_set.rb, line 92
def source_for(spec)
  f = @set.find { |t| t.spec == spec }
  f.source
end

# File lib/rubygems/available_set.rb, line 105
def to_request_set development = :none
  request_set = Gem::RequestSet.new
  request_set.development = :all == development

  each_spec do |spec|
    request_set.always_install << spec

    request_set.gem spec.name, spec.version
    request_set.import spec.development_dependencies if
      :shallow == development
  end

  request_set
end