fix(backward): sprigin needs to still align with sprig no error

sprigin/sprig_backward_compatibility.go

@@ -3,9 +3,11 @@ package sprigin
 import (
 	htemplate "html/template"
 	"log/slog"
+	gostrings "strings"
 	ttemplate "text/template"
 
 	"github.com/go-sprout/sprout"
+	"github.com/go-sprout/sprout/internal/runtime"
 	"github.com/go-sprout/sprout/registry/backward"
 	"github.com/go-sprout/sprout/registry/checksum"
 	"github.com/go-sprout/sprout/registry/conversion"
@@ -192,6 +194,18 @@ func (sh *SprigHandler) Build() sprout.FunctionMap {
 	sprout.AssignAliases(sh)
 	sprout.AssignNotices(sh)
 
+	// BACKWARDS COMPATIBILITY
+	// Ensure error handling is consistent with sprig functions
+	for funcName, fn := range sh.funcsMap {
+		if !gostrings.HasPrefix(funcName, "must") {
+			sh.funcsMap[funcName] = func(args ...any) (any, error) {
+				out, _ := runtime.SafeCall(fn, args...)
+				return out, nil
+			}
+		}
+	}
+	//\ BACKWARDS COMPATIBILITY
+
 	return sh.funcsMap
 }
 

sprigin/sprig_backward_compatibility_test.go

@@ -36,10 +36,12 @@ func TestFuncMap_IncludesHello(t *testing.T) {
 	_, exists := funcMap["hello"]
 	assert.True(t, exists)
 
-	helloFunc, ok := funcMap["hello"].(func() string)
+	helloFunc, ok := funcMap["hello"].(func() (string, error))
 	assert.True(t, ok)
 
-	assert.Equal(t, "Hello!", helloFunc())
+	result, err := helloFunc()
+	assert.NoError(t, err)
+	assert.Equal(t, "Hello!", result)
 }
 
 func TestSprigHandler(t *testing.T) {
@@ -51,9 +53,9 @@ func TestSprigHandler(t *testing.T) {
 	handler.Build()
 
 	assert.GreaterOrEqual(t, len(handler.Functions()), sprigFunctionCount)
-	assert.Len(t, handler.Aliases(), 7)
+	assert.Len(t, handler.Aliases(), 37) // Hardcoded for backward compatibility
 
-	assert.Len(t, handler.registries, 18)
+	assert.Len(t, handler.registries, 18) // Hardcoded for backward compatibility
 
 	registriesUids := []string{}
 	for _, registry := range handler.registries {