From 87fbe622ce93fa4e97531363bdbb4a2dec63305d Mon Sep 17 00:00:00 2001
From: cridye <cridye@8638fb3e-16cb-4fca-ae20-7b5d299a9bcd>
Date: Mon, 22 Jun 2009 23:31:53 +0000
Subject: [PATCH] allow empty groups in node ranges, provided they are defined
 in nodegroup table

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@3615 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
---
 perl-xCAT/xCAT/NodeRange.pm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/perl-xCAT/xCAT/NodeRange.pm b/perl-xCAT/xCAT/NodeRange.pm
index 5d47b430c..406158200 100644
--- a/perl-xCAT/xCAT/NodeRange.pm
+++ b/perl-xCAT/xCAT/NodeRange.pm
@@ -88,6 +88,15 @@ sub expandatom {
                 }
           }
 
+  # check to see if atom is a defined group name that didn't have any current members                                               
+  if ( scalar @nodes == 0 ) {                                                                                                       
+    for my $row ( $nodegroup->getAllAttribs('groupname') ) {                                                                        
+      if ( $row->{groupname} eq $atom ) {                                                                                           
+        return ();                                                                                                                  
+      }                                                                                                                             
+    }                                                                                                                               
+  }
+
 	if ($atom =~ m/^[0-9]+\z/) {    # if only numbers, then add the prefix
 		my $nodename=$nprefix.$atom.$nsuffix;
 		return expandatom($nodename,$verify);