GooEngine: Version warning script for non-goo-engine builds

scripts/startup/bl_ui/space_userpref.py

@@ -1533,6 +1533,7 @@ class USERPREF_PT_saveload_blend(SaveLoadPanel, CenterAlignMixIn, Panel):
 
         col = layout.column(heading="Text Files")
         col.prop(paths, "use_tabs_as_spaces")
+        col.prop(paths, "save_version_warning")
 
         col = layout.column()
         col.prop(paths, "save_version")

scripts/startup/goo_engine_file_warning.py

@@ -0,0 +1,62 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+# <pep8 compliant>
+
+"""
+Custom file version warning system, to avoid mistakes with regular blender builds and production files.
+"""
+
+import bpy
+from bpy.types import Operator
+from bpy.app.handlers import persistent
+import os
+
+script_name = ".version_warning.py"
+script_content = """
+import bpy
+
+def draw_popup_warning(self, context):
+    self.layout.label(text=f"Warning: file edited in Goo Engine, data may be lost if used in standard Blender!")
+
+if not bpy.app.version_string.endswith('Goo Engine'):
+    print("File loaded, not a Goo Engine build!")
+    bpy.context.window_manager.popup_menu(draw_popup_warning, title="Warning", icon='ERROR')
+"""
+
+
+@persistent
+def save_handler(_):
+    if not bpy.context.preferences.filepaths.save_version_warning:
+        return
+    text = bpy.data.texts.get(script_name)
+    if not text:
+        text = bpy.data.texts.new(script_name)
+    text.use_module = True
+    text.clear()
+    text.write(script_content)
+
+def register():
+    bpy.app.handlers.save_pre.append(save_handler)
+
+def unregister():
+    bpy.app.handlers.save_pre.remove(save_handler)
+
+
+if __name__ == "__main__":
+    register()

source/blender/blenloader/intern/versioning_300.cc

@@ -68,6 +68,7 @@
 #include "BKE_node.hh"
 #include "BKE_screen.h"
 #include "BKE_simulation_state_serialize.hh"
+#include "BKE_text.h"
 #include "BKE_workspace.h"
 
 #include "RNA_access.h"
@@ -4319,6 +4320,17 @@ void blo_do_versions_300(FileData *fd, Library * /*lib*/, Main *bmain)
     }
   }
 
+  /* Goo engine version warning script - remove the old one if it exists. */
+  if (!MAIN_VERSION_ATLEAST(bmain, 306, 0)) {
+    LISTBASE_FOREACH_MUTABLE (Text *, text, &bmain->texts) {
+      if (strcmp(text->id.name, "TX.version_warning.py") > 0) {
+        continue;
+      }
+      BLI_remlink(&bmain->texts, text);
+      BKE_id_free(bmain, text);
+    }
+  }
+
   if (!MAIN_VERSION_ATLEAST(bmain, 306, 3)) {
     /* Z bias for retopology overlay. */
     if (!DNA_struct_elem_find(fd->filesdna, "View3DOverlay", "float", "retopology_offset")) {

source/blender/blenloader/intern/versioning_userdef.c

@@ -447,7 +447,7 @@ void blo_do_versions_userdef(UserDef *userdef)
 
   if (!USER_VERSION_ATLEAST(278, 6)) {
     /* Clear preference flags for re-use. */
-    userdef->flag &= ~(USER_FLAG_NUMINPUT_ADVANCED | USER_FLAG_UNUSED_2 | USER_FLAG_UNUSED_3 |
+    userdef->flag &= ~(USER_FLAG_NUMINPUT_ADVANCED | USER_FLAG_VERSION_SCRIPT | USER_FLAG_UNUSED_3 |
                        USER_FLAG_UNUSED_6 | USER_FLAG_UNUSED_7 | USER_FLAG_UNUSED_9 |
                        USER_DEVELOPER_UI);
     userdef->uiflag &= ~(USER_HEADER_BOTTOM);

source/blender/makesdna/DNA_userdef_types.h

@@ -1034,7 +1034,7 @@ typedef enum eUserPref_SpaceData_Flag {
 typedef enum eUserPref_Flag {
   USER_AUTOSAVE = (1 << 0),
   USER_FLAG_NUMINPUT_ADVANCED = (1 << 1),
-  USER_FLAG_UNUSED_2 = (1 << 2), /* cleared */
+  USER_FLAG_VERSION_SCRIPT = (1 << 2), /* cleared */
   USER_FLAG_UNUSED_3 = (1 << 3), /* cleared */
   USER_FLAG_UNUSED_4 = (1 << 4), /* cleared */
   USER_TRACKBALL = (1 << 5),

source/blender/makesrna/intern/rna_userdef.c

@@ -6409,6 +6409,13 @@ static void rna_def_userdef_filepaths(BlenderRNA *brna)
       "Tabs as Spaces",
       "Automatically convert all new tabs into spaces for new and loaded text files");
 
+  prop = RNA_def_property(srna, "save_version_warning", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_negative_sdna(prop, NULL, "flag", USER_FLAG_VERSION_SCRIPT);
+  RNA_def_property_boolean_default(prop, true);
+  RNA_def_property_ui_text(prop,
+                           "Embed version warning popup",
+                           "Embed a script that provides a warning pop-up if this file is opened in a non-GooEngine build");
+
   /* Directories. */
 
   prop = RNA_def_property(srna, "font_directory", PROP_STRING, PROP_DIRPATH);