Comment 16 for bug 1931558

Some more detail.

The ideal solution is to break the "definition" argument of validate() [1] into two arguments "definition_contents" and "definition_filename". By doing so, we can avoid double loading of file contents.

On the other hand, this solution is not backward-compatible, so https://review.opendev.org/c/openstack/python-mistralclient/+/800950 proposes a workaround to allow us to pass "definition_contents" explicitly.
This workaround works at least from the prespective of the usage of mistral-dashboard.

[1] https://opendev.org/openstack/python-mistralclient/src/commit/609f4f48a9a740c56aeae1ce1ba1581a7f07838d/mistralclient/api/v2/workbooks.py#L98