setup_signer

# File lib/rubygems/package.rb, line 463
  def setup_signer
    passphrase = ENV['GEM_PRIVATE_KEY_PASSPHRASE']
    if @spec.signing_key then
      @signer = Gem::Security::Signer.new @spec.signing_key, @spec.cert_chain, passphrase
      @spec.signing_key = nil
      @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_s }
    else
      @signer = Gem::Security::Signer.new nil, nil, passphrase
      @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_pem } if
        @signer.cert_chain
    end
  end