[TGC] Suppress schema default values in CAI-to-HCL flattener templates

Author: zli82016

mmv1/api/type.go

@@ -1562,3 +1562,15 @@ func (t Type) HasRequiredProperty() bool {
 	}
 	return false
 }
+
+func (t *Type) HasAncestorCustomSet() bool {
+	p := t.ParentMetadata
+	for p != nil {
+		if p.IsSet && p.SetHashFunc != "" {
+			return true
+		}
+		p = p.ParentMetadata
+	}
+	return false
+}
+

mmv1/templates/tgc_next/cai2hcl/flatten_property_method_tgc.go.tmpl

@@ -140,13 +140,23 @@ func flatten{{$.GetPrefix}}{{$.TitlelizeProperty}}(v interface{}, d *schema.Reso
 	// Handles the string fixed64 format
 	if strVal, ok := v.(string); ok {
 		if intVal, err := tpgresource.StringToFixed64(strVal); err == nil {
+			{{- if and (ne $.DefaultValue nil) (not $.Required) (not $.HasAncestorCustomSet) }}
+			if intVal == {{ $.GoLiteral $.DefaultValue }} {
+				return nil
+			}
+			{{- end }}
 			return intVal
 		}
 	}
 
 	// number values are represented as float64
 	if floatVal, ok := v.(float64); ok {
 		intVal := int(floatVal)
+		{{- if and (ne $.DefaultValue nil) (not $.Required) (not $.HasAncestorCustomSet) }}
+		if intVal == {{ $.GoLiteral $.DefaultValue }} {
+			return nil
+		}
+		{{- end }}
 		return intVal
 	}
 
@@ -156,6 +166,15 @@ func flatten{{$.GetPrefix}}{{$.TitlelizeProperty}}(v interface{}, d *schema.Reso
 	}
   {{- end }}
 
+  {{- if and (ne $.DefaultValue nil) (not $.Required) (not $.HasAncestorCustomSet) }}
+	if intVal, ok := v.(int); ok && intVal == {{ $.GoLiteral $.DefaultValue }} {
+		return nil
+	}
+	if floatVal, ok := v.(float64); ok && floatVal == {{ $.GoLiteral $.DefaultValue }} {
+		return nil
+	}
+  {{- end }}
+
 	return v // let terraform core handle it otherwise
   {{- else if and ($.IsA "Array") ($.ItemType.IsA "ResourceRef")}}
   if v == nil {
@@ -196,6 +215,21 @@ func flatten{{$.GetPrefix}}{{$.TitlelizeProperty}}(v interface{}, d *schema.Reso
 	}
 	return v
   {{- else }}
+    {{- if and (ne $.DefaultValue nil) (not $.Required) (not $.HasAncestorCustomSet) }}
+      {{- if or ($.IsA "String") (or ($.IsA "Enum") ($.IsA "ResourceRef")) }}
+	if strVal, ok := v.(string); ok && strVal == {{ $.GoLiteral $.DefaultValue }} {
+		return nil
+	}
+      {{- else if $.IsA "Boolean" }}
+	if boolVal, ok := v.(bool); ok && boolVal == {{ $.GoLiteral $.DefaultValue }} {
+		return nil
+	}
+      {{- else if $.IsA "Double" }}
+	if floatVal, ok := v.(float64); ok && floatVal == {{ $.GoLiteral $.DefaultValue }} {
+		return nil
+	}
+      {{- end }}
+    {{- end }}
   return v
 {{- end }}
 }