Method execute

src/bonsai/bonsai/bim/operator.py:247–340

Save the current blend file as a metadata-only file (no geometry), preserving settings, window arrangement, geometry nodes, etc.

(self, context)

    bl_options = {"REGISTER", "UNDO"}

    def execute(self, context):
        """
        Save the current blend file as a metadata-only file (no geometry), preserving settings, window arrangement, geometry nodes, etc.
        """
        props = tool.Blender.get_bim_props()
        ifc_file = getattr(props, "ifc_file", None)
        if not ifc_file:
            self.report({"WARNING"}, "No IFC file path set.")
            return {"CANCELLED"}

        suffix = tool.Blender.get_addon_preferences().metadata_blend_file_suffix
        if ifc_file.lower().endswith(".ifc"):
            blendmetadata_path = ifc_file[:-4] + suffix
        else:
            blendmetadata_path = ifc_file + suffix

        ifc_dir = os.path.dirname(ifc_file)
        temp_path = os.path.join(ifc_dir, "__temp_blendmetadata.blend")
        bpy.ops.wm.save_as_mainfile(filepath=temp_path, copy=True)

        cleanup_script = f"""
import bpy

# Ensure all styles are loaded before attempting to remove them
bpy.ops.bim.load_styles()

# 1. Collect all IfcStyle material names
ifcstyle_material_names = []
styles_props = getattr(bpy.context.scene, "BIMStylesProperties", None)
if styles_props is None and bpy.data.scenes:
    styles_props = getattr(bpy.data.scenes[0], "BIMStylesProperties", None)
if styles_props:
    for style in list(styles_props.styles):
        material = getattr(style, "blender_material", None)
        if material and material.name:
            ifcstyle_material_names.append(material.name)

# 2. Purge IfcStore
from bonsai.bim.ifc import IfcStore
IfcStore.purge()

# 3. Remove all collections named IfcProject*
for collection in list(bpy.data.collections):
    if collection.name.startswith('IfcProject'):
        bpy.data.collections.remove(collection, do_unlink=True)

# 4.1 Remove all collections from linked libraries (they will be recreated by bonsai)
for collection in list(bpy.data.collections):
    if collection.library:
        bpy.data.collections.remove(collection, do_unlink=True)

# 4.2. Remove all empty objects that are collection instances for linked models
for obj in list(bpy.data.objects):
    if obj.type == 'EMPTY' and obj.instance_type == 'COLLECTION' and obj.name.startswith('IfcProject/'):
        bpy.data.objects.remove(obj, do_unlink=True)

# 5. Purge orphaned data blocks after removing IfcProject collections
bpy.ops.outliner.orphans_purge(do_local_ids=True, do_linked_ids=True, do_recursive=True)