openstack: Apply FeatureSet in manifest-test

With this patch, manifest-tests parse feature-set and feature-gates
information from the environment variables `FEATURE_SET` and
`FEATURE_GATES`.

This change enables testing the generation of manifests in the CAPI
flow.

Author: pierreprinetti

hack/openstack/test-manifests.sh

@@ -39,13 +39,29 @@ print_help() {
 	echo -e "\\t-t\\t\\tpath to the tests to be run (defaults to '${tests_dir}')"
 	echo -e "\\t-p\\t\\tpersist artifacts: do not delete files generated by openshift-install"
 	echo -e "\\t-r <regexp>\\trun: only run test cases that match the given regular expression"
+	echo
+	echo -e 'Parsed environment variables:'
+	echo -e "\\tOS_CLOUD\\t\\ttarget OpenStack cloud (must match an entry in cloud.yaml)"
+	echo -e "\\tFEATURE_SET\\t\\tsets the cluster feature set. This is used to enable custom features such as tech preview features."
+	echo -e "\\tFEATURE_GATES\\t\\tcomma-separated list of cluster feature gates. This is used to enable custom features. Only to be used in conjunction with FEATURE_SET=CustomNoUpgrade."
 }
 
 fill_install_config() {
 	declare -r \
 		template="$1" \
 		pull_secret="'"'{"auths":{"registry.svc.ci.openshift.org":{"auth":"QW4gYWN0dWFsIHB1bGwgc2VjcmV0IGlzIG5vdCBuZWNlc3NhcnkK"}}}'"'"
 
+	if [[ -n "$FEATURE_SET" ]]; then
+		echo "featureSet: '${FEATURE_SET}'"
+	fi
+	if [[ -n "$FEATURE_GATES" ]]; then
+		echo 'featureGates:'
+		IFS=',' read -ra gates <<< "$FEATURE_GATES"
+		for gate in "${gates[@]}"; do
+			echo "- ${gate}"
+		done
+	fi
+
 	sed '
 		s|${\?OS_CLOUD}\?|'"${os_cloud}"'|;
 		s|${\?EXTERNAL_NETWORK}\?|'"${external_network}"'|;