puppetlabs/puppet — pull request #2922 by rji (2014-07-30 16:23:32+00:00)
Title: (QENG-1013) use $ruby_arch only if it has been set

In ci-bootstrap-from-artifacts.sh, we ran into an issue where the script
will attempt to append $ruby_arch if the platform is Windows, even if
Jenkins has not set $ruby_arch. This adds a sanity check to ensure
$ruby_arch is set and has a value before trying to use it.