fix: kustomize should support components

integration/render_test.go

@@ -1438,19 +1438,31 @@ patchesStrategicMerge:
 
 resources:
 - ../../base
+
+components:
+- ../../components/label
 `, "overlays/dev/deployment.yaml": `apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: skaffold-kustomize
   labels:
     env: dev # from-param: ${env2}
+`, "components/label/kustomization.yaml": `apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+
+labels:
+  - includeTemplates: true
+    includeSelectors: false
+    pairs:
+      region: 333a
 `}, expectedOut: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   labels:
     app: 111a
     env: 222a
+    region: 333a
   name: skaffold-kustomize-dev
 spec:
   selector:
@@ -1460,6 +1472,7 @@ spec:
     metadata:
       labels:
         app: skaffold-kustomize
+        region: 333a
     spec:
       containers:
       - image: skaffold-kustomize
@@ -2064,7 +2077,7 @@ metadata:
   labels:
     app1: after-change-1
     app2: before-change-2
-         
+
 spec:
   containers:
   - image: us-central1-docker.pkg.dev/k8s-skaffold/testing/multi-config-module1:customtag
@@ -2332,7 +2345,7 @@ spec:
 kind: Deployment
 metadata:
   name: my-nginx
-  annotations: 
+  annotations:
     color: orange
     fruit: apple
 spec:
@@ -2342,7 +2355,7 @@ spec:
       app: nginx
   template:
     metadata:
-      annotations: 
+      annotations:
         color: orange
         fruit: apple
       labels:

pkg/skaffold/render/renderer/kustomize/kustomize.go

@@ -211,6 +211,9 @@ func (k Kustomize) mirror(kusDir string, fs TmpFS) error {
 	if err := k.mirrorConfigMapGenerators(kusDir, fs, kustomization.ConfigMapGenerator); err != nil {
 		return err
 	}
+	if err := k.mirrorComponents(kusDir, fs, kustomization.Components); err != nil {
+		return err
+	}
 
 	return nil
 }
@@ -405,6 +408,27 @@ func (k Kustomize) mirrorConfigMapGenerators(kusDir string, fs TmpFS, args []typ
 	return nil
 }
 
+func (k Kustomize) mirrorComponents(kusDir string, fs TmpFS, components []string) error {
+	for _, r := range components {
+		// note that r is relative to kustomization file not working dir here
+		rPath := filepath.Join(kusDir, r)
+		stat, err := os.Stat(rPath)
+		if err != nil {
+			return err
+		}
+		if stat.IsDir() {
+			if err := k.mirror(rPath, fs); err != nil {
+				return err
+			}
+		} else {
+			if err := k.mirrorFile(kusDir, fs, r); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
 func kustomizeDependencies(workdir string, paths []string) ([]string, error) {
 	deps := stringset.New()
 	for _, kustomizePath := range paths {