fix(pkg/engine): allow to override all functions

Signed-off-by: Stepan Paksashvili <stepan.paksashvili@flant.com>

pkg/engine/engine.go

@@ -196,11 +196,6 @@ func (e Engine) initFunMap(t *template.Template) {
 	funcMap := funcMap()
 	includedNames := make(map[string]int)
 
-	// Set custom template funcs
-	for k, v := range e.CustomTemplateFuncs {
-		funcMap[k] = v
-	}
-
 	// Add the template-rendering functions here so we can close over t.
 	funcMap["include"] = includeFun(t, includedNames)
 	funcMap["tpl"] = tplFun(t, includedNames, e.Strict)
@@ -251,6 +246,11 @@ func (e Engine) initFunMap(t *template.Template) {
 		}
 	}
 
+	// Set custom template funcs
+	for k, v := range e.CustomTemplateFuncs {
+		funcMap[k] = v
+	}
+
 	t.Funcs(funcMap)
 }
 

pkg/engine/engine_test.go

@@ -1302,7 +1302,7 @@ func TestRenderTplMissingKeyString(t *testing.T) {
 }
 
 func TestRenderCustomTemplateFuncs(t *testing.T) {
-	// Create a chart with a single template that uses a custom function "exclaim"
+	// Create a chart with two templates that use custom functions
 	c := &chart.Chart{
 		Metadata: &chart.Metadata{Name: "CustomFunc"},
 		Templates: []*chart.File{
@@ -1326,7 +1326,7 @@ func TestRenderCustomTemplateFuncs(t *testing.T) {
 		},
 	}
 
-	// Define a custom template function "exclaim" that appends "!!!" to a string.
+	// Define a custom template function "exclaim" that appends "!!!" to a string and override "upper" function
 	customFuncs := template.FuncMap{
 		"exclaim": func(input string) string {
 			return input + "!!!"