class ParallelInstaller::SpecInstallation

def all_dependencies
  @spec.dependencies
end

def dependencies(all_spec_names)
  @dependencies ||= begin
    deps = all_dependencies.reject {|dep| ignorable_dependency? dep }
    missing = deps.reject {|dep| all_spec_names.include? dep.name }
    if missing.size > 0
      raise Bundler::LockfileError, "Your Gemfile.lock is corrupt. The following #{missing.size > 1 ? "gems are" : "gem is"} missing " \
                          "from the DEPENDENCIES section: '#{missing.map(&:name).join('\' \'')}'"
    end
    deps
  end
end

def dependencies_installed?(all_specs)
  installed_specs = all_specs.select(&:installed?).map(&:name)
  dependencies(all_specs.map(&:name)).all? {|d| installed_specs.include? d.name }
end

def enqueued?
  state == :enqueued
end

def has_post_install_message?
  !post_install_message.empty?
end

def ignorable_dependency?(dep)
  dep.type == :development || dep.name == @name
end

def initialize(spec)
  @spec = spec
  @name = spec.name
  @state = :none
  @post_install_message = ""
end

def installed?
  state == :installed
end

def ready_to_enqueue?
  !installed? && !enqueued?
end