sepia-fog-images: count words in $remaininghosts

Signed-off-by: David Galloway <dgallowa@redhat.com>

diff --git a/sepia-fog-images/build/build b/sepia-fog-images/build/build
index 39e865604856aa181c111b2e2339b3cb6d3ecd5b..1e61e937a8eba9bcaa1b1e5377e01fbce7a28618 100755 (executable)
--- a/sepia-fog-images/build/build
+++ b/sepia-fog-images/build/build
@@ -127,7 +127,9 @@ set +e
 
 # Set DHCP next-server back to FOG and prep each machine for FOG capturing
 remaininghosts=$allhosts
-while [ "$remaininghosts" != "" ]; do
+# Once all the hostnames are removed from $remaininghosts, trailing spaces are all that's left.
+# I'm sure there's a cleaner way to compile the list of hostnames above.  PRs welcome.
+while [[ $(echo $remaininghosts | wc -w) != 0 ]]; do
   for host in $remaininghosts; do
     if ssh -q ubuntu@${host}.front.sepia.ceph.com stat /ceph-qa-ready \> /dev/null 2\>\&1; then
       # Bail if anything fails