Do not reformat OCIL if not needed

If we have Python 3.9 or newer, we use the ElementTree.indent method
which formats the output which means the output doesn't have to be
reformatted.

cmake/SSGCommon.cmake

@@ -458,15 +458,26 @@ macro(ssg_build_oval_final PRODUCT)
     endif()
 endmacro()
 
-# Apply a final xmllint pass over the OCIL document to pretty-format the output
-# OCIL document for the product.
+# If built with Python older than 3.9, apply a final xmllint pass over the
+# OCIL document to pretty-format the output OCIL document for the product.
+# If Python 3.9 or newer is used for the build, the output OVAL is already
+# generated pretty and doesn't need to be reformatted.
 macro(ssg_build_ocil_final PRODUCT)
-    add_custom_command(
-        OUTPUT "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
-        COMMAND "${XMLLINT_EXECUTABLE}" --nsclean --format --output "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
-        DEPENDS generate-${PRODUCT}-xccdf-oval-ocil "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-xccdf.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-oval.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
-        COMMENT "[${PRODUCT}-content] generating ssg-${PRODUCT}-ocil.xml"
-    )
+    if (PYTHON_VERSION_MAJOR LESS 3 OR PYTHON_VERSION_MINOR LESS 9)
+        add_custom_command(
+            OUTPUT "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            COMMAND "${XMLLINT_EXECUTABLE}" --nsclean --format --output "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            DEPENDS generate-${PRODUCT}-xccdf-oval-ocil "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-xccdf.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-oval.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            COMMENT "[${PRODUCT}-content] generating ssg-${PRODUCT}-ocil.xml"
+        )
+    else()
+        add_custom_command(
+            OUTPUT "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml" "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            DEPENDS generate-${PRODUCT}-xccdf-oval-ocil "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-xccdf.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-oval.xml" "${CMAKE_CURRENT_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"
+            COMMENT "[${PRODUCT}-content] generating ssg-${PRODUCT}-ocil.xml"
+        )
+    endif()
     add_custom_target(
         generate-ssg-${PRODUCT}-ocil.xml
         DEPENDS "${CMAKE_BINARY_DIR}/ssg-${PRODUCT}-ocil.xml"