🐛 Ensure schemapatcher does not error when non CRD yaml files are present

pkg/schemapatcher/gen.go

@@ -358,12 +358,16 @@ func crdsFromDirectory(ctx *genall.GenerationContext, dir string) (map[schema.Gr
 		if err := kyaml.Unmarshal(rawContent, &typeMeta); err != nil {
 			continue
 		}
+
+		if typeMeta.APIVersion == "" || typeMeta.Kind != "CustomResourceDefinition" {
+			// If there's no API version this file probably isn't a CRD.
+			// Likewise we don't need to care if the Kind isn't CustomResourceDefinition.
+			continue
+		}
+
 		if !isSupportedAPIExtGroupVer(typeMeta.APIVersion) {
 			return nil, fmt.Errorf("load %q: apiVersion %q not supported", filepath.Join(dir, fileInfo.Name()), typeMeta.APIVersion)
 		}
-		if typeMeta.Kind != "CustomResourceDefinition" {
-			continue
-		}
 
 		// collect the group-kind and versions from the actual structured form
 		var actualCRD crdIsh

pkg/schemapatcher/testdata/valid/example.cr.yaml

@@ -0,0 +1,3 @@
+# This is an example of the resource defined in this package.
+apiVersion: kubebuilder.schemapatcher.controller-tools.sigs.k8s.io/v1
+kind: Example

pkg/schemapatcher/testdata/valid/random.yaml

@@ -0,0 +1 @@
+name: This is a random YAML file to ensure the generator doesn't error with non-kube YAML files.