Feat: support with metadata as context render cue file in the addon (#3549)

Signed-off-by: barnettZQG <barnett.zqg@gmail.com>

pkg/addon/addon.go

@@ -567,7 +567,7 @@ func renderResources(addon *InstallPackage, args map[string]interface{}) ([]comm
 	}
 
 	for _, tmpl := range addon.CUETemplates {
-		comp, err := renderCUETemplate(tmpl, addon.Parameters, args)
+		comp, err := renderCUETemplate(tmpl, addon.Parameters, args, addon.Meta)
 		if err != nil {
 			return nil, NewAddonError(fmt.Sprintf("fail to render cue template %s", err.Error()))
 		}
@@ -932,17 +932,28 @@ func renderSchemaConfigmap(elem ElementFile) (*unstructured.Unstructured, error)
 }
 
 // renderCUETemplate will return a component from cue template
-func renderCUETemplate(elem ElementFile, parameters string, args map[string]interface{}) (*common2.ApplicationComponent, error) {
+func renderCUETemplate(elem ElementFile, parameters string, args map[string]interface{}, metadata Meta) (*common2.ApplicationComponent, error) {
 	bt, err := json.Marshal(args)
 	if err != nil {
 		return nil, err
 	}
+	var contextFile = strings.Builder{}
 	var paramFile = cuemodel.ParameterFieldName + ": {}"
 	if string(bt) != "null" {
 		paramFile = fmt.Sprintf("%s: %s", cuemodel.ParameterFieldName, string(bt))
 	}
-	param := fmt.Sprintf("%s\n%s", paramFile, parameters)
-	v, err := value.NewValue(param, nil, "")
+	// addon metadata context
+	metadataJSON, err := json.Marshal(metadata)
+	if err != nil {
+		return nil, err
+	}
+	contextFile.WriteString(fmt.Sprintf("context: metadata: %s\n", string(metadataJSON)))
+	// parameter definition
+	contextFile.WriteString(paramFile + "\n")
+	// user custom parameter
+	contextFile.WriteString(parameters + "\n")
+
+	v, err := value.NewValue(contextFile.String(), nil, "")
 	if err != nil {
 		return nil, err
 	}

pkg/addon/addon_test.go

@@ -880,3 +880,20 @@ func TestReadDefFile(t *testing.T) {
 	// verify
 	assert.True(t, len(uiData.Definitions) == 1)
 }
+
+func TestRenderCUETemplate(t *testing.T) {
+	fileDate, err := os.ReadFile("./testdata/example/resources/configmap.cue")
+	assert.NoError(t, err)
+	component, err := renderCUETemplate(ElementFile{Data: string(fileDate), Name: "configmap.cue"}, "{\"example\": \"\"}", map[string]interface{}{
+		"example": "render",
+	}, Meta{
+		Version: "1.0.1",
+	})
+	assert.NoError(t, err)
+	assert.True(t, component.Type == "raw")
+	var config = make(map[string]interface{})
+	err = json.Unmarshal(component.Properties.Raw, &config)
+	assert.NoError(t, err)
+	assert.True(t, component.Type == "raw")
+	assert.True(t, config["metadata"].(map[string]interface{})["labels"].(map[string]interface{})["version"] == "1.0.1")
+}

pkg/addon/testdata/example/metadata.yaml

@@ -1,5 +1,5 @@
 name: example
-version: 1.0.0
+version: 1.0.1
 description: Extended workload to do continuous and progressive delivery
 icon: https://raw.githubusercontent.com/fluxcd/flux/master/docs/_files/weave-flux.png
 url: https://fluxcd.io

pkg/addon/testdata/example/resources/configmap.cue

@@ -6,6 +6,9 @@ output: {
 		metadata: {
 			name:      "exampleinput"
 			namespace: "default"
+			labels: {
+			  version: context.metadata.version
+			}
 		}
 		data: input: parameter.example
 	}