Adds e2e test for init command

Author: seans3

examples/alphaTestExamples/init.md

@@ -0,0 +1,156 @@
+[kind]: https://github.com/kubernetes-sigs/kind
+
+# Demo: Init Command
+
+This demo shows how the kapply init command works.
+
+First define a place to work:
+
+<!-- @makeWorkplace @testE2EAgainstLatestRelease -->
+```
+DEMO_HOME=$(mktemp -d)
+```
+
+Alternatively, use
+
+> ```
+> DEMO_HOME=~/demo
+> ```
+
+## Establish the base
+
+<!-- @createBase @testE2EAgainstLatestRelease -->
+```
+BASE=$DEMO_HOME/base
+mkdir -p $BASE
+OUTPUT=$DEMO_HOME/output
+mkdir -p $OUTPUT
+
+function expectedOutputLine() {
+  test 1 == \
+  $(grep "$@" $OUTPUT/status | wc -l); \
+  echo $?
+}
+```
+
+## Create the first "app"
+
+Create the config yaml for three config maps: (cm-a, cm-b, cm-c).
+
+<!-- @createFirstConfigMaps @testE2EAgainstLatestRelease-->
+```
+cat <<EOF >$BASE/namespace.yaml
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: test-namespace
+EOF
+
+cat <<EOF >$BASE/config-map-a.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-a
+  namespace: test-namespace
+  labels:
+    name: test-config-map-label
+EOF
+
+cat <<EOF >$BASE/config-map-b.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-b
+  namespace: test-namespace
+  labels:
+    name: test-config-map-label
+EOF
+
+cat <<EOF >$BASE/config-map-c.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-c
+  namespace: test-namespace
+  labels:
+    name: test-config-map-label
+EOF
+```
+
+## Run end-to-end tests
+
+The following requires installation of [kind].
+
+Delete any existing kind cluster and create a new one. By default the name of the cluster is "kind".
+
+<!-- @deleteAndCreateKindCluster @testE2EAgainstLatestRelease -->
+```
+kind delete cluster
+kind create cluster
+```
+
+Use the kapply init command to generate the inventory template. This contains
+the namespace and inventory id used by apply to create inventory objects. 
+<!-- @createInventoryTemplate @testE2EAgainstLatestRelease-->
+```
+kapply init $BASE > $OUTPUT/status
+expectedOutputLine "namespace: test-namespace is used for inventory object"
+```
+
+Add another ConfigMap (cm-d) which is in the default namespace. The init
+command should calculate the namespace to be default, since not all
+objects are in the test-namespace.
+
+<!-- @updateApp @testE2EAgainstLatestRelease -->
+```
+
+cat <<EOF >$BASE/config-map-d.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: cm-d
+  labels:
+    name: test-config-map-label
+EOF
+
+# Remove the initial inventory template.
+rm -f $BASE/inventory-template.yaml
+
+kapply init $BASE > $OUTPUT/status
+expectedOutputLine "namespace: default is used for inventory object"
+```
+
+Remove the ConfigMap (cm-d) which is in the default namespace, and
+add a cluster-scoped object. This cluster-scoped object should not
+be used in the init namespace calculations, so we should calculate the
+namespace as test-namespace.
+
+<!-- @updateAppAgain @testE2EAgainstLatestRelease -->
+```
+
+# Remove the initial inventory template.
+rm -f $BASE/inventory-template.yaml
+
+# Remove the ConfigMap in the default namespace.
+rm -f $BASE/config-map-d.yaml
+
+# Add cluster-scoped resource--cluster-role
+cat <<EOF >$BASE/cluster-role.yaml
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  # "namespace" omitted since ClusterRoles are not namespaced
+  name: secret-reader
+rules:
+- apiGroups: [""]
+  #
+  # at the HTTP level, the name of the resource for accessing Secret
+  # objects is "secrets"
+  resources: ["secrets"]
+  verbs: ["get", "watch", "list"]
+EOF
+
+kapply init $BASE > $OUTPUT/status
+expectedOutputLine "namespace: test-namespace is used for inventory object"
+```
+

pkg/config/initoptions.go

@@ -157,6 +157,7 @@ func allInSameNamespace(packageDir string) (string, bool, error) {
 		// Skip found cluster-scoped resources. If not found, just assume namespaced.
 		namespaced, found := openapi.IsNamespaceScoped(rm.TypeMeta)
 		if found && !namespaced {
+			klog.V(6).Infof("cluster-scoped resource %s--skip namespace calc", rm.TypeMeta)
 			continue
 		}
 		if rm.Namespace == "" {