Add PROPERTY_USAGE_NEVER_DUPLICATE flag and use for script

Co-authored-by: Yakov Borevich <j.borevich@gmail.com>

7 files changed, 34 insertions, 27 deletions

diff --git a/core/core_constants.cpp b/core/core_constants.cpp
index 2da693dd98..b1f56539e5 100644
--- a/core/core_constants.cpp
+++ b/core/core_constants.cpp
@@ -587,6 +587,7 @@ void register_global_constants() {
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_NIL_IS_VARIANT);
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_ARRAY);
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_ALWAYS_DUPLICATE);
+	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_NEVER_DUPLICATE);
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_HIGH_END_GFX);
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT);
 	BIND_CORE_BITFIELD_FLAG(PROPERTY_USAGE_RESOURCE_NOT_PERSISTENT);
diff --git a/core/io/resource.cpp b/core/io/resource.cpp
index 022e34ecc6..e44bbc246b 100644
--- a/core/io/resource.cpp
+++ b/core/io/resource.cpp
@@ -262,7 +262,7 @@ Ref<Resource> Resource::duplicate(bool p_subresources) const {
 
 		if ((p.get_type() == Variant::DICTIONARY || p.get_type() == Variant::ARRAY)) {
 			r->set(E.name, p.duplicate(p_subresources));
-		} else if (p.get_type() == Variant::OBJECT && (p_subresources || (E.usage & PROPERTY_USAGE_ALWAYS_DUPLICATE))) {
+		} else if (p.get_type() == Variant::OBJECT && !(E.usage & PROPERTY_USAGE_NEVER_DUPLICATE) && (p_subresources || (E.usage & PROPERTY_USAGE_ALWAYS_DUPLICATE))) {
 			Ref<Resource> sr = p;
 			if (sr.is_valid()) {
 				r->set(E.name, sr->duplicate(p_subresources));
diff --git a/core/object/object.cpp b/core/object/object.cpp
index 2cb56dfe6c..a8b9e00c96 100644
--- a/core/object/object.cpp
+++ b/core/object/object.cpp
@@ -499,7 +499,7 @@ void Object::get_property_list(List<PropertyInfo> *p_list, bool p_reversed) cons
 	_get_property_listv(p_list, p_reversed);
 
 	if (!is_class("Script")) { // can still be set, but this is for user-friendliness
-		p_list->push_back(PropertyInfo(Variant::OBJECT, "script", PROPERTY_HINT_RESOURCE_TYPE, "Script", PROPERTY_USAGE_DEFAULT));
+		p_list->push_back(PropertyInfo(Variant::OBJECT, "script", PROPERTY_HINT_RESOURCE_TYPE, "Script", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NEVER_DUPLICATE));
 	}
 
 	if (script_instance && !p_reversed) {
diff --git a/core/object/object.h b/core/object/object.h
index 92a8decb68..ec77da4ee1 100644
--- a/core/object/object.h
+++ b/core/object/object.h
@@ -110,14 +110,15 @@ enum PropertyUsageFlags {
 	PROPERTY_USAGE_NIL_IS_VARIANT = 1 << 17,
 	PROPERTY_USAGE_ARRAY = 1 << 18, // Used in the inspector to group properties as elements of an array.
 	PROPERTY_USAGE_ALWAYS_DUPLICATE = 1 << 19, // When duplicating a resource, always duplicate, even with subresource duplication disabled.
-	PROPERTY_USAGE_HIGH_END_GFX = 1 << 20,
-	PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT = 1 << 21,
-	PROPERTY_USAGE_RESOURCE_NOT_PERSISTENT = 1 << 22,
-	PROPERTY_USAGE_KEYING_INCREMENTS = 1 << 23, // Used in inspector to increment property when keyed in animation player.
-	PROPERTY_USAGE_DEFERRED_SET_RESOURCE = 1 << 24, // when loading, the resource for this property can be set at the end of loading.
-	PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT = 1 << 25, // For Object properties, instantiate them when creating in editor.
-	PROPERTY_USAGE_EDITOR_BASIC_SETTING = 1 << 26, //for project or editor settings, show when basic settings are selected.
-	PROPERTY_USAGE_READ_ONLY = 1 << 27, // Mark a property as read-only in the inspector.
+	PROPERTY_USAGE_NEVER_DUPLICATE = 1 << 20, // When duplicating a resource, never duplicate, even with subresource duplication enabled.
+	PROPERTY_USAGE_HIGH_END_GFX = 1 << 21,
+	PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT = 1 << 22,
+	PROPERTY_USAGE_RESOURCE_NOT_PERSISTENT = 1 << 23,
+	PROPERTY_USAGE_KEYING_INCREMENTS = 1 << 24, // Used in inspector to increment property when keyed in animation player.
+	PROPERTY_USAGE_DEFERRED_SET_RESOURCE = 1 << 25, // when loading, the resource for this property can be set at the end of loading.
+	PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT = 1 << 26, // For Object properties, instantiate them when creating in editor.
+	PROPERTY_USAGE_EDITOR_BASIC_SETTING = 1 << 27, //for project or editor settings, show when basic settings are selected.
+	PROPERTY_USAGE_READ_ONLY = 1 << 28, // Mark a property as read-only in the inspector.
 
 	PROPERTY_USAGE_DEFAULT = PROPERTY_USAGE_STORAGE | PROPERTY_USAGE_EDITOR,
 	PROPERTY_USAGE_NO_EDITOR = PROPERTY_USAGE_STORAGE,
diff --git a/doc/classes/@GlobalScope.xml b/doc/classes/@GlobalScope.xml
index 2f2165239a..4fdb7d82c5 100644
--- a/doc/classes/@GlobalScope.xml
+++ b/doc/classes/@GlobalScope.xml
@@ -2667,22 +2667,25 @@
 		<constant name="PROPERTY_USAGE_ALWAYS_DUPLICATE" value="524288" enum="PropertyUsageFlags" is_bitfield="true">
 			When duplicating a resource with [method Resource.duplicate], and this flag is set on a property of that resource, the property should always be duplicated, regardless of the [code]subresources[/code] bool parameter.
 		</constant>
-		<constant name="PROPERTY_USAGE_HIGH_END_GFX" value="1048576" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_NEVER_DUPLICATE" value="1048576" enum="PropertyUsageFlags" is_bitfield="true">
+			When duplicating a resource with [method Resource.duplicate], and this flag is set on a property of that resource, the property should never be duplicated, regardless of the [code]subresources[/code] bool parameter.
+		</constant>
+		<constant name="PROPERTY_USAGE_HIGH_END_GFX" value="2097152" enum="PropertyUsageFlags" is_bitfield="true">
 			The property is only shown in the editor if modern renderers are supported (GLES3 is excluded).
 		</constant>
-		<constant name="PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT" value="2097152" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_NODE_PATH_FROM_SCENE_ROOT" value="4194304" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_RESOURCE_NOT_PERSISTENT" value="4194304" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_RESOURCE_NOT_PERSISTENT" value="8388608" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_KEYING_INCREMENTS" value="8388608" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_KEYING_INCREMENTS" value="16777216" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_DEFERRED_SET_RESOURCE" value="16777216" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_DEFERRED_SET_RESOURCE" value="33554432" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT" value="33554432" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT" value="67108864" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_EDITOR_BASIC_SETTING" value="67108864" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_EDITOR_BASIC_SETTING" value="134217728" enum="PropertyUsageFlags" is_bitfield="true">
 		</constant>
-		<constant name="PROPERTY_USAGE_READ_ONLY" value="134217728" enum="PropertyUsageFlags" is_bitfield="true">
+		<constant name="PROPERTY_USAGE_READ_ONLY" value="268435456" enum="PropertyUsageFlags" is_bitfield="true">
 			The property is read-only in the [EditorInspector].
 		</constant>
 		<constant name="PROPERTY_USAGE_DEFAULT" value="6" enum="PropertyUsageFlags" is_bitfield="true">
diff --git a/doc/classes/Resource.xml b/doc/classes/Resource.xml
index 7b6dd7d987..67f466ad4c 100644
--- a/doc/classes/Resource.xml
+++ b/doc/classes/Resource.xml
@@ -24,7 +24,8 @@
 			<param index="0" name="subresources" type="bool" default="false" />
 			<description>
 				Duplicates this resource, returning a new resource with its [code]export[/code]ed or [constant PROPERTY_USAGE_STORAGE] properties copied from the original.
-				If [param subresources] is [code]false[/code], a shallow copy is returned. Nested resources within subresources are not duplicated and are shared from the original resource. This behavior can be overridden by the [constant PROPERTY_USAGE_ALWAYS_DUPLICATE] flag.
+				If [param subresources] is [code]false[/code], a shallow copy is returned; nested resources within subresources are not duplicated and are shared from the original resource. If [param subresources] is [code]true[/code], a deep copy is returned; nested subresources will be duplicated and are not shared.
+				Subresource properties with the [constant PROPERTY_USAGE_ALWAYS_DUPLICATE] flag are always duplicated even with [param subresources] set to [code]false[/code], and properties with the [constant PROPERTY_USAGE_NEVER_DUPLICATE] flag are never duplicated even with [param subresources] set to [code]true[/code].
 				[b]Note:[/b] For custom resources, this method will fail if [method Object._init] has been defined with required parameters.
 			</description>
 		</method>
diff --git a/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/GodotEnums.cs b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/GodotEnums.cs
index 1a72284e71..22a21a1754 100644
--- a/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/GodotEnums.cs
+++ b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/GodotEnums.cs
@@ -112,14 +112,15 @@ namespace Godot.SourceGenerators
         NilIsVariant = 131072,
         Array = 262144,
         AlwaysDuplicate = 524288,
-        HighEndGfx = 1048576,
-        NodePathFromSceneRoot = 2097152,
-        ResourceNotPersistent = 4194304,
-        KeyingIncrements = 8388608,
-        DeferredSetResource = 16777216,
-        EditorInstantiateObject = 33554432,
-        EditorBasicSetting = 67108864,
-        ReadOnly = 134217728,
+        NeverDuplicate = 1048576,
+        HighEndGfx = 2097152,
+        NodePathFromSceneRoot = 4194304,
+        ResourceNotPersistent = 8388608,
+        KeyingIncrements = 16777216,
+        DeferredSetResource = 33554432,
+        EditorInstantiateObject = 67108864,
+        EditorBasicSetting = 134217728,
+        ReadOnly = 268435456,
         Default = 6,
         NoEditor = 2
     }