fix bugs and add tests

Signed-off-by: 楚岳 <wangyike.wyk@alibaba-inc.com>

pkg/addon/render.go

@@ -50,6 +50,7 @@ const (
 	addonAllClusterPolicy              = "deploy-addon-to-all-clusters"
 	renderOutputCuePath                = "output"
 	renderAuxiliaryOutputsPath         = "outputs"
+	defaultCuePackageHeader            = "main"
 )
 
 type addonCueTemplateRender struct {
@@ -340,6 +341,13 @@ func renderResources(addon *InstallPackage, args map[string]interface{}) ([]comm
 	}
 
 	for _, tmpl := range addon.CUETemplates {
+		isMainCueTemplate, err := checkCueFileHasPackageHeader(tmpl)
+		if err != nil {
+			return nil, err
+		}
+		if isMainCueTemplate {
+			continue
+		}
 		comp, err := renderCompAccordingCUETemplate(tmpl, addon, args)
 		if err != nil && strings.Contains(err.Error(), "var(path=output) not exist") {
 			continue
@@ -373,3 +381,14 @@ func isDeployToRuntime(addon *InstallPackage) bool {
 	}
 	return addon.DeployTo.RuntimeCluster || addon.DeployTo.LegacyRuntimeCluster
 }
+
+func checkCueFileHasPackageHeader(cueTemplate ElementFile) (bool, error) {
+	cueFile, err := parser.ParseFile(cueTemplate.Name, cueTemplate.Data, parser.ParseComments)
+	if err != nil {
+		return false, err
+	}
+	if cueFile.PackageName() == defaultCuePackageHeader {
+		return true, nil
+	}
+	return false, nil
+}

pkg/addon/render_test.go

@@ -451,3 +451,99 @@ func TestRenderCueResourceError(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, len(comp), 2)
 }
+
+func TestCheckCueFileHasPackageHeader(t *testing.T) {
+	testCueTemplateWithPkg := `
+package main
+
+kustomizeController: {
+	// About this name, refer to #429 for details.
+	name: "fluxcd-kustomize-controller"
+	type: "webservice"
+	dependsOn: ["fluxcd-ns"]
+	properties: {
+		imagePullPolicy: "IfNotPresent"
+		image:           _base + "fluxcd/kustomize-controller:v0.26.0"
+		env: [
+			{
+				name:  "RUNTIME_NAMESPACE"
+				value: _targetNamespace
+			},
+		]
+		livenessProbe: {
+			httpGet: {
+				path: "/healthz"
+				port: 9440
+			}
+			timeoutSeconds: 5
+		}
+		readinessProbe: {
+			httpGet: {
+				path: "/readyz"
+				port: 9440
+			}
+			timeoutSeconds: 5
+		}
+		volumeMounts: {
+			emptyDir: [
+				{
+					name:      "temp"
+					mountPath: "/tmp"
+				},
+			]
+		}
+	}
+	traits: [
+		{
+			type: "service-account"
+			properties: {
+				name:       "sa-kustomize-controller"
+				create:     true
+				privileges: _rules
+			}
+		},
+		{
+			type: "labels"
+			properties: {
+				"control-plane": "controller"
+				// This label is kept to avoid breaking existing 
+				// KubeVela e2e tests (makefile e2e-setup).
+				"app": "kustomize-controller"
+			}
+		},
+		{
+			type: "command"
+			properties: {
+				args: controllerArgs
+			}
+		},
+	]
+}
+`
+
+	testCueTemplateWithoutPkg := `
+output: {
+   type: "helm"
+	name: "nginx-ingress"
+	properties: {
+		repoType: "helm"
+		url:      "https://kubernetes.github.io/ingress-nginx"
+		chart:    "ingress-nginx"
+		version:  "4.2.0"
+		values: {
+			controller: service: type: parameter["serviceType"]
+		}
+	}
+}
+`
+
+	cueTemplate := ElementFile{Name: "test-file.cue", Data: testCueTemplateWithPkg}
+	ok, err := checkCueFileHasPackageHeader(cueTemplate)
+	assert.NoError(t, err)
+	assert.Equal(t, true, ok)
+
+	cueTemplate = ElementFile{Name: "test-file-without-pkg.cue", Data: testCueTemplateWithoutPkg}
+	ok, err = checkCueFileHasPackageHeader(cueTemplate)
+	assert.NoError(t, err)
+	assert.Equal(t, false, ok)
+}