bumping: fix root element to include DESCRIBED elements

Signed-off-by: Armin Tänzer <armin.taenzer@tngtech.com>

Author: armintaenzertng

src/spdx_tools/spdx3/bump_from_spdx2/creation_info.py

@@ -70,7 +70,7 @@ def bump_creation_info(spdx2_creation_info: Spdx2_CreationInfo, payload: Payload
         name=spdx2_creation_info.name,
         comment=spdx2_creation_info.document_comment,
         element=[],
-        root_element=[spdx_id],
+        root_element=[],
         imports=imports,
         namespaces=namespaces,
     )

src/spdx_tools/spdx3/bump_from_spdx2/spdx_document.py

@@ -9,7 +9,9 @@
 from spdx_tools.spdx3.bump_from_spdx2.snippet import bump_snippet
 from spdx_tools.spdx3.model import CreationInfo, SpdxDocument
 from spdx_tools.spdx3.payload import Payload
+from spdx_tools.spdx.model import RelationshipType
 from spdx_tools.spdx.model.document import Document as Spdx2_Document
+from spdx_tools.spdx.model.relationship_filters import filter_by_type_and_origin
 
 """ We want to implement a bump_from_spdx2 from the data model in src.spdx to the data model in src.spdx3.
     As there are many fundamental differences between these version we want each bump_from_spdx2 method to take
@@ -20,6 +22,13 @@ def bump_spdx_document(document: Spdx2_Document) -> Payload:
     payload = Payload()
     document_namespace: str = document.creation_info.document_namespace
     spdx_document: SpdxDocument = bump_creation_info(document.creation_info, payload)
+    spdx_document.root_element = [
+        f"{document_namespace}#{relationship.related_spdx_element_id}"
+        for relationship in filter_by_type_and_origin(
+            document.relationships, RelationshipType.DESCRIBES, "SPDXRef-DOCUMENT"
+        )
+    ]
+
     creation_info: CreationInfo = spdx_document.creation_info
 
     payload.add_element(spdx_document)