[Multi_K8s-Plugin] Add per-target kustomizeVersion and kustomizeOptions

pkg/app/pipedv1/plugin/kubernetes_multicluster/config/application.go

@@ -195,10 +195,12 @@ func FindDeployTarget(cfg *config.PipedPlugin, name string) (KubernetesDeployTar
 }
 
 type KubernetesMultiTarget struct {
-	Target         KubernetesMultiTargetDeployTarget `json:"target"`
-	Manifests      []string                          `json:"manifests,omitempty"`
-	KubectlVersion string                            `json:"kubectlVersion,omitempty"`
-	KustomizeDir   string                            `json:"kustomizeDir,omitempty"`
+	Target           KubernetesMultiTargetDeployTarget `json:"target"`
+	Manifests        []string                          `json:"manifests,omitempty"`
+	KubectlVersion   string                            `json:"kubectlVersion,omitempty"`
+	KustomizeDir     string                            `json:"kustomizeDir,omitempty"`
+	KustomizeVersion string                            `json:"kustomizeVersion,omitempty"`
+	KustomizeOptions map[string]string                 `json:"kustomizeOptions,omitempty"`
 }
 
 type KubernetesMultiTargetDeployTarget struct {

pkg/app/pipedv1/plugin/kubernetes_multicluster/deployment/load_manifests_test.go

@@ -0,0 +1,128 @@
+// Copyright 2026 The PipeCD Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package deployment
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap/zaptest"
+
+	sdk "github.com/pipe-cd/piped-plugin-sdk-go"
+
+	kubeconfig "github.com/pipe-cd/pipecd/pkg/app/pipedv1/plugin/kubernetes_multicluster/config"
+	"github.com/pipe-cd/pipecd/pkg/app/pipedv1/plugin/kubernetes_multicluster/provider"
+)
+
+// capturingLoader records the LoaderInput it receives so tests can assert on it.
+type capturingLoader struct {
+	capturedInput provider.LoaderInput
+}
+
+func (c *capturingLoader) LoadManifests(_ context.Context, input provider.LoaderInput) ([]provider.Manifest, error) {
+	c.capturedInput = input
+	return nil, nil
+}
+
+func TestLoadManifests_KustomizeOverrides(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name        string
+		specInput   kubeconfig.KubernetesDeploymentInput
+		multiTarget *kubeconfig.KubernetesMultiTarget
+		wantVersion string
+		wantOptions map[string]string
+	}{
+		{
+			name: "top-level version and options used when multiTarget has none",
+			specInput: kubeconfig.KubernetesDeploymentInput{
+				KustomizeVersion: "5.3.0",
+				KustomizeOptions: map[string]string{"flag": "val"},
+			},
+			multiTarget: &kubeconfig.KubernetesMultiTarget{},
+			wantVersion: "5.3.0",
+			wantOptions: map[string]string{"flag": "val"},
+		},
+		{
+			name: "multiTarget version overrides top-level version",
+			specInput: kubeconfig.KubernetesDeploymentInput{
+				KustomizeVersion: "5.3.0",
+			},
+			multiTarget: &kubeconfig.KubernetesMultiTarget{
+				KustomizeVersion: "5.4.3",
+			},
+			wantVersion: "5.4.3",
+			wantOptions: nil,
+		},
+		{
+			name: "multiTarget options override top-level options",
+			specInput: kubeconfig.KubernetesDeploymentInput{
+				KustomizeOptions: map[string]string{"original": "val"},
+			},
+			multiTarget: &kubeconfig.KubernetesMultiTarget{
+				KustomizeOptions: map[string]string{"load-restrictor": "LoadRestrictionsNone"},
+			},
+			wantVersion: "",
+			wantOptions: map[string]string{"load-restrictor": "LoadRestrictionsNone"},
+		},
+		{
+			name: "multiTarget version and options both override top-level",
+			specInput: kubeconfig.KubernetesDeploymentInput{
+				KustomizeVersion: "5.3.0",
+				KustomizeOptions: map[string]string{"flag": "val"},
+			},
+			multiTarget: &kubeconfig.KubernetesMultiTarget{
+				KustomizeVersion: "5.4.3",
+				KustomizeOptions: map[string]string{"enable-helm": ""},
+			},
+			wantVersion: "5.4.3",
+			wantOptions: map[string]string{"enable-helm": ""},
+		},
+		{
+			name: "nil multiTarget uses top-level values",
+			specInput: kubeconfig.KubernetesDeploymentInput{
+				KustomizeVersion: "5.3.0",
+				KustomizeOptions: map[string]string{"key": "val"},
+			},
+			multiTarget: nil,
+			wantVersion: "5.3.0",
+			wantOptions: map[string]string{"key": "val"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			cl := &capturingLoader{}
+			p := &Plugin{}
+
+			spec := &kubeconfig.KubernetesApplicationSpec{
+				Input: tt.specInput,
+			}
+			deploy := &sdk.Deployment{PipedID: "piped-id", ApplicationID: "app-id"}
+			source := &sdk.DeploymentSource[kubeconfig.KubernetesApplicationSpec]{}
+
+			_, err := p.loadManifests(context.Background(), deploy, spec, source, cl, zaptest.NewLogger(t), tt.multiTarget)
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.wantVersion, cl.capturedInput.KustomizeVersion)
+			assert.Equal(t, tt.wantOptions, cl.capturedInput.KustomizeOptions)
+		})
+	}
+}

pkg/app/pipedv1/plugin/kubernetes_multicluster/deployment/plugin.go

@@ -89,14 +89,22 @@ func (p *Plugin) ExecuteStage(ctx context.Context, _ *sdk.ConfigNone, dts []*sdk
 }
 
 func (p *Plugin) loadManifests(ctx context.Context, deploy *sdk.Deployment, spec *kubeconfig.KubernetesApplicationSpec, deploymentSource *sdk.DeploymentSource[kubeconfig.KubernetesApplicationSpec], loader loader, logger *zap.Logger, multiTarget *kubeconfig.KubernetesMultiTarget) ([]provider.Manifest, error) {
-	// Override manifest paths and kustomize directory from the per-target config if set.
+	// Start with top-level input values, then override with per-target values when set.
 	manifestPathes := spec.Input.Manifests
 	kustomizeDir := ""
+	kustomizeVersion := spec.Input.KustomizeVersion
+	kustomizeOptions := spec.Input.KustomizeOptions
 	if multiTarget != nil {
 		if len(multiTarget.Manifests) > 0 {
 			manifestPathes = multiTarget.Manifests
 		}
 		kustomizeDir = multiTarget.KustomizeDir
+		if multiTarget.KustomizeVersion != "" {
+			kustomizeVersion = multiTarget.KustomizeVersion
+		}
+		if len(multiTarget.KustomizeOptions) > 0 {
+			kustomizeOptions = multiTarget.KustomizeOptions
+		}
 	}
 
 	manifests, err := loader.LoadManifests(ctx, provider.LoaderInput{
@@ -108,9 +116,9 @@ func (p *Plugin) loadManifests(ctx context.Context, deploy *sdk.Deployment, spec
 		ConfigFilename:   deploymentSource.ApplicationConfigFilename,
 		Manifests:        manifestPathes,
 		Namespace:        spec.Input.Namespace,
-		KustomizeVersion: spec.Input.KustomizeVersion,
+		KustomizeVersion: kustomizeVersion,
 		KustomizeDir:     kustomizeDir,
-		KustomizeOptions: spec.Input.KustomizeOptions,
+		KustomizeOptions: kustomizeOptions,
 		HelmVersion:      spec.Input.HelmVersion,
 		HelmChart:        spec.Input.HelmChart,
 		HelmOptions:      spec.Input.HelmOptions,