Merge pull request #761 from fluxcd/kustomize-name-prefix-suffix

kustomize: Add support for `namePrefix` and `nameSuffix`

kustomize/kustomize_generator.go

@@ -52,6 +52,8 @@ const (
 	patchesSMField       = "patchesStrategicMerge"
 	patchesJson6902Field = "patchesJson6902"
 	imagesField          = "images"
+	namePrefixField      = "namePrefix"
+	nameSuffixField      = "nameSuffix"
 )
 
 // Action is the action that was taken on the kustomization file
@@ -173,6 +175,24 @@ func (g *Generator) WriteFile(dirPath string, opts ...SavingOptions) (Action, er
 		kus.Namespace = tg
 	}
 
+	nprefix, ok, err := g.getNestedString(specField, namePrefixField)
+	if err != nil {
+		errf := CleanDirectory(dirPath, action)
+		return action, fmt.Errorf("%v %v", err, errf)
+	}
+	if ok {
+		kus.NamePrefix = nprefix
+	}
+
+	nsuffix, ok, err := g.getNestedString(specField, nameSuffixField)
+	if err != nil {
+		errf := CleanDirectory(dirPath, action)
+		return action, fmt.Errorf("%v %v", err, errf)
+	}
+	if ok {
+		kus.NameSuffix = nsuffix
+	}
+
 	patches, err := g.getPatches()
 	if err != nil {
 		errf := CleanDirectory(dirPath, action)

kustomize/kustomize_generator_test.go

@@ -82,6 +82,27 @@ func TestGenerator_NoResources(t *testing.T) {
 	g.Expect(string(data)).To(ContainSubstring("originAnnotations"))
 }
 
+func TestGenerator_NameTransformer(t *testing.T) {
+	g := NewWithT(t)
+	dataKS, err := os.ReadFile("./testdata/name/ks.yaml")
+	g.Expect(err).NotTo(HaveOccurred())
+
+	ks, err := readYamlObjects(strings.NewReader(string(dataKS)))
+	g.Expect(err).NotTo(HaveOccurred())
+
+	tmpDir, err := testTempDir(t)
+	g.Expect(err).ToNot(HaveOccurred())
+	g.Expect(copy.Copy("testdata/name", tmpDir)).To(Succeed())
+	_, err = kustomize.NewGenerator(tmpDir, ks[0]).WriteFile(tmpDir)
+	g.Expect(err).NotTo(HaveOccurred())
+
+	resMap, err := kustomize.SecureBuild(tmpDir, tmpDir, false)
+	g.Expect(err).NotTo(HaveOccurred())
+	g.Expect(resMap.Resources()).To(HaveLen(1))
+	g.Expect(resMap.Resources()[0].GetName()).To(ContainSubstring("prefix-test-configmap-suffix"))
+	g.Expect(resMap.Resources()[0].GetNamespace()).To(Equal("test-namespace"))
+}
+
 func TestKustomizationGenerator(t *testing.T) {
 	tests := []struct {
 		name    string

kustomize/testdata/name/ks.yaml

@@ -0,0 +1,16 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: test-name
+  namespace: test-namespace
+spec:
+  targetNamespace: test-namespace
+  namePrefix: prefix-
+  nameSuffix: -suffix
+  interval: 4m0s
+  path: ./
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: app

kustomize/testdata/name/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+configMapGenerator:
+  - name: test-configmap
+    literals:
+      - foo=bar
+      - baz=qux