class Bundler::StubSpecification

def self.from_stub(stub)
  return stub if stub.is_a?(Bundler::StubSpecification)
  spec = new(stub.name, stub.version, stub.platform, nil)
  spec.stub = stub
  spec
end

def _remote_specification
  @_remote_specification ||= begin
    rs = stub.to_spec
    if rs.equal?(self) # happens when to_spec gets the spec from Gem.loaded_specs
      rs = Gem::Specification.load(loaded_from)
      Bundler.rubygems.stub_set_spec(stub, rs)
    end
    unless rs
      raise GemspecError, "The gemspec for #{full_name} at #{loaded_from}" \
        " was missing or broken. Try running `gem pristine #{name} -v #{version}`" \
        " to fix the cached spec."
    end
    rs.source = source
    rs
  end
end

def activated
  stub.activated
end

def activated=(activated)
  stub.instance_variable_set(:@activated, activated)
end

def default_gem?
  stub.default_gem?
end

def extensions
  stub.extensions
end

def full_gem_path
  stub.full_gem_path
end

def full_gem_path=(path)
  stub.full_gem_path = path
end

def full_require_paths
  stub.full_require_paths
end

def gem_build_complete_path
  File.join(extension_dir, "gem.build_complete")
end

def load_paths
  full_require_paths
end

def loaded_from
  stub.loaded_from
end

def manually_installed?
  # This is for manually installed gems which are gems that were fixed in place after a
  # failed installation. Once the issue was resolved, the user then manually created
  # the gem specification using the instructions provided by `gem help install`
  installed_by_version == Gem::Version.new(0)
end

def matches_for_glob(glob)
  stub.matches_for_glob(glob)
end

def missing_extensions?
  return false if default_gem?
  return false if extensions.empty?
  return false if File.exist? gem_build_complete_path
  return false if manually_installed?
  true
end

def raw_require_paths
  stub.raw_require_paths
end

def source=(source)
  super
  # Stub has no concept of source, which means that extension_dir may be wrong
  # This is the case for git-based gems. So, instead manually assign the extension dir
  return unless source.respond_to?(:extension_dir_name)
  path = File.join(stub.extensions_dir, source.extension_dir_name)
  stub.extension_dir = File.expand_path(path)
end

def to_yaml
  _remote_specification.to_yaml
end