fix: Components with no version (optional since 1.4) produce invalid …

…BOM output in XML #150

Signed-off-by: Paul Horton <[email protected]>

cyclonedx/exception/output.py

@@ -22,14 +22,6 @@
 from . import CycloneDxException
 
 
-class ComponentVersionRequiredException(CycloneDxException):
-    """
-    Exception raised when attempting to output to an SBOM version that mandates a Component has a version,
-    but one is not available/present.
-    """
-    pass
-
-
 class FormatNotSupportedException(CycloneDxException):
     """
     Exception raised when attempting to output a BOM to a format not supported in the requested version.

cyclonedx/output/xml.py

@@ -24,7 +24,6 @@
 from . import BaseOutput, SchemaVersion
 from .schema import BaseSchemaVersion, SchemaVersion1Dot0, SchemaVersion1Dot1, SchemaVersion1Dot2, SchemaVersion1Dot3, \
     SchemaVersion1Dot4
-from ..exception.output import ComponentVersionRequiredException
 from ..model import ExternalReference, HashType, OrganizationalEntity, OrganizationalContact, Tool
 from ..model.bom import Bom
 from ..model.component import Component
@@ -147,11 +146,9 @@ def _add_component_element(self, component: Component) -> ElementTree.Element:
                 ElementTree.SubElement(component_element, 'version').text = component.version
         else:
             if not component.version:
-                raise ComponentVersionRequiredException(
-                    f'Component "{str(component)}" has no version but the target schema version mandates '
-                    f'Components have a version specified'
-                )
-            ElementTree.SubElement(component_element, 'version').text = component.version
+                ElementTree.SubElement(component_element, 'version')
+            else:
+                ElementTree.SubElement(component_element, 'version').text = component.version
 
         # hashes
         if component.hashes: