Resolve #1749. You can now save as another IFC filename.

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -740,12 +740,13 @@ class ExportIFC(bpy.types.Operator):
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
     json_version: bpy.props.EnumProperty(items=[("4", "4", ""), ("5a", "5a", "")], name="IFC JSON Version")
     json_compact: bpy.props.BoolProperty(name="Export Compact IFCJSON", default=False)
+    should_save_as: bpy.props.BoolProperty(name="Should Save As", default=False)
 
     def invoke(self, context, event):
         if not IfcStore.get_file():
             self.report({"ERROR"}, "No IFC project is available for export - create or import a project first.")
             return {"FINISHED"}
-        if context.scene.BIMProperties.ifc_file:
+        if context.scene.BIMProperties.ifc_file and not self.should_save_as:
             self.filepath = context.scene.BIMProperties.ifc_file
             return self.execute(context)
         if not self.filepath:
@@ -789,7 +790,7 @@ class ExportIFC(bpy.types.Operator):
         if not scene.DocProperties.ifc_files:
             new = scene.DocProperties.ifc_files.add()
             new.name = output_file
-        if not scene.BIMProperties.ifc_file:
+        if not scene.BIMProperties.ifc_file or self.should_save_as:
             scene.BIMProperties.ifc_file = output_file
         if bpy.data.is_saved and bpy.data.is_dirty and bpy.data.filepath:
             bpy.ops.wm.save_mainfile(filepath=bpy.data.filepath)

src/blenderbim/blenderbim/bim/module/project/ui.py

@@ -134,6 +134,8 @@ class BIM_PT_project(Panel):
         row = self.layout.row(align=True)
         row.prop(props, "ifc_file", text="")
         row.operator("bim.reload_ifc_file", icon="FILE_REFRESH", text="")
+        op = row.operator("export_ifc.bim", icon="FILE_TICK", text="")
+        op.should_save_as = True
         row.operator("bim.select_ifc_file", icon="FILE_FOLDER", text="")
 
         row = self.layout.row(align=True)

src/blenderbim/test/bim/feature/project.feature

@@ -324,7 +324,13 @@ Scenario: Export IFC - with basic contents
     Given an empty Blender session
     And I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
     When I press "export_ifc.bim(filepath='{cwd}/test/files/export.ifc')"
-    Then nothing happens
+    Then "scene.BIMProperties.ifc_file" is "{cwd}/test/files/basic.ifc"
+
+Scenario: Export IFC - with basic contents and saving as another file
+    Given an empty Blender session
+    And I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
+    When I press "export_ifc.bim(filepath='{cwd}/test/files/export.ifc', should_save_as=True)"
+    Then "scene.BIMProperties.ifc_file" is "{cwd}/test/files/export.ifc"
 
 Scenario: Export IFC - with deleted objects synchronised
     Given an empty IFC project