src: add usage label to Dockerfile

Fixes: #107

Author: lance

Dockerfile

@@ -38,7 +38,8 @@ LABEL io.k8s.description="$DESCRIPTION" \
  summary="$SUMMARY" \
  description="$DESCRIPTION" \
  version="$NODE_VERSION" \
- name="nodeshift/centos7-s2i-nodejs"
+ name="nodeshift/centos7-s2i-nodejs" \
+ usage="s2i build . nodeshift/centos7-s2i-nodejs myapp"
 
 COPY ./s2i/ $STI_SCRIPTS_PATH
 COPY ./contrib/ /opt/app-root

test/run.sh

@@ -259,7 +259,20 @@ url.https://github.com.insteadof=ssh://git@github.com"
  fi
 }
 
+test_image_usage_label() {
+ local expected="s2i build . nodeshift/centos7-s2i-nodejs myapp"
+ echo "Checking image usage label ..."
+ out=$(docker inspect --format '{{ index .Config.Labels "usage" }}' $BUILDER)
+ if ! echo "${out}" | grep -q "${expected}"; then
+ echo "ERROR[docker inspect --format \"{{ index .Config.Labels \"usage\" }}\"] Expected '${expected}', got '${out}'"
+ return 1
+ fi
+}
+
 prepare
+test_image_usage_label
+check_result $?
+
 test_builder_node_version
 check_result $?