module Bundler::Plugin

def gemfile_install(gemfile = nil, &inline)
  Bundler.settings.temporary(:frozen => false, :deployment => false) do
    builder = DSL.new
    if block_given?
      builder.instance_eval(&inline)
    else
      builder.eval_gemfile(gemfile)
    end
    builder.check_primary_source_safety
    definition = builder.to_definition(nil, true)
    return if definition.dependencies.empty?
    plugins = definition.dependencies.map(&:name).reject {|p| index.installed? p }
    installed_specs = Installer.new.install_definition(definition)
    save_plugins plugins, installed_specs, builder.inferred_plugins
  end
rescue RuntimeError => e
  unless e.is_a?(GemfileError)
    Bundler.ui.error "Failed to install plugin: #{e.message}\n  #{e.backtrace[0]}"
  end
  raise
end