gistfile1.txt

$ git diff
diff --git a/manifests/repo/rdo.pp b/manifests/repo/rdo.pp
index 9f172d1..7baae49 100644
--- a/manifests/repo/rdo.pp
+++ b/manifests/repo/rdo.pp
@@ -2,10 +2,10 @@
 class openstack::repo::rdo {
   include openstack::repo::epel

-  if $::osfamily == 'RedHat' {
-    $dist = $::operatingsystem ? {
-      /(CentOS|RedHat|Scientific|SLC)/ => 'epel',
-      'Fedora' => 'fedora',
+  if $::osfamily == 'Redhat' {
+    case $operatingsystem {
+        centos, redhat, scientific, slc: { $dist = 'epel' }
+        fedora: { $dist = 'fedora'}
     }
     # $lsbmajdistrelease is only available with redhat-lsb installed
     $osver = regsubst($::operatingsystemrelease, '(\d+)\..*', '\1')