feat(api): Namespace template function (#3069)

Author: emosbaugh

api/pkg/template/app.go

@@ -0,0 +1,10 @@
+package template
+
+import (
+	"github.com/replicatedhq/embedded-cluster/pkg-new/constants"
+)
+
+// namespace returns the namespace for the app
+func (e *Engine) namespace() string {
+	return constants.KotsadmNamespace
+}

api/pkg/template/app_test.go

@@ -0,0 +1,69 @@
+package template
+
+import (
+	"testing"
+
+	"github.com/replicatedhq/embedded-cluster/pkg-new/constants"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestEngine_namespace(t *testing.T) {
+	tests := []struct {
+		name           string
+		expectedResult string
+	}{
+		{
+			name:           "returns kotsadm namespace",
+			expectedResult: constants.KotsadmNamespace,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			engine := NewEngine(nil, WithMode(ModeGeneric))
+			err := engine.Parse("{{repl Namespace }}")
+			require.NoError(t, err)
+
+			result, err := engine.Execute(nil)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expectedResult, result)
+		})
+	}
+}
+
+func TestEngine_namespaceIntegrated(t *testing.T) {
+	tests := []struct {
+		name           string
+		template       string
+		expectedResult string
+	}{
+		{
+			name:           "namespace in string concatenation",
+			template:       "{{repl Namespace }}-suffix",
+			expectedResult: constants.KotsadmNamespace + "-suffix",
+		},
+		{
+			name:           "namespace in conditional logic",
+			template:       `{{repl if eq Namespace "kotsadm" }}correct{{repl else }}incorrect{{repl end }}`,
+			expectedResult: "correct",
+		},
+		{
+			name:           "namespace value check",
+			template:       "prefix-{{repl Namespace }}",
+			expectedResult: "prefix-" + constants.KotsadmNamespace,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			engine := NewEngine(nil, WithMode(ModeGeneric))
+			err := engine.Parse(tt.template)
+			require.NoError(t, err)
+
+			result, err := engine.Execute(nil)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expectedResult, result)
+		})
+	}
+}

api/pkg/template/execute.go

@@ -188,6 +188,9 @@ func (e *Engine) getFuncMap() template.FuncMap {
 
 		// Airgap template functions
 		"IsAirgap": e.isAirgap,
+
+		// App template functions
+		"Namespace": e.namespace,
 	}
 }
 

e2e/kots-release-install-v3/config.yaml

@@ -649,3 +649,11 @@ spec:
             ---
 
             {{repl VersionLabel }}
+
+        - name: template_function_namespace
+          type: label
+          title: |
+            ## Namespace
+            ---
+
+            {{repl Namespace }}