bash woes

command.sh

$ wait_for_command "oc get imagestream openldap --template='{{with $tags := .status.tags}}{{with $event := index $tags 0}}{{$event.tag}}{{end}}{{end}}' | grep latest" $((60*TIME_SEC))
test/extended/authentication.sh: line 63: tags: unbound variable

$ wait_for_command 'oc get imagestream openldap --template="{{with $tags := .status.tags}}{{with $event := index $tags 0}}{{$event.tag}}{{end}}{{end}}" | grep latest' $((60*TIME_SEC))
test/extended/../../hack/util.sh: line 198: tags: unbound variable

$ wait_for_command 'tags= && event= && oc get imagestream openldap --template="{{with $tags := .status.tags}}{{with $event := index $tags 0}}{{$event.tag}}{{end}}{{end}}" | grep latest' $((60*TIME_SEC))
error: error parsing template {{with  := .status.tags}}{{with  := index  0}}{{.tag}}{{end}}{{end}}, template: output:1: unexpected ":=" in with