Allow generation of empty Python paks

korman/exporter/python.py

@@ -149,9 +149,12 @@ class PythonPackageExporter:
 
             # DONE
             report.progress_end()
+            report.raise_errors()
 
     def _package_python(self, report):
         py_code = self._compyle(report)
+        if not py_code:
+            report.error("No Python files were packaged.")
         self._write_python_pak(py_code, report)
 
     def _write_python_pak(self, py_code, report):

korman/korlib/python.py

@@ -132,7 +132,9 @@ def package_python(stream, pyc_objects):
     # ~~~~~
     # uint32_t filesz
     # uint8_t data[filesz]
-    assert bool(pyc_objects)
+    if not pyc_objects:
+        stream.writeInt(0)
+        return
 
     # `stream` might be a plEncryptedStream, which doesn't seek very well at all.
     # Therefore, we will go ahead and calculate the size of the index block so

korman/operators/op_export.py

@@ -277,6 +277,9 @@ class PlasmaPythonExportOperator(ExportOperator, bpy.types.Operator):
         except korlib.PythonNotAvailableError as error:
             self.report({"ERROR"}, "Python Version {} not found".format(error))
             return {"CANCELLED"}
+        except exporter.NonfatalExportError as error:
+            self.report({"WARNING"}, str(error))
+            return {"FINISHED"}
         else:
             return {"FINISHED"}