[ovirt-users] How to generate Swagger specification of the oVirt API?

Hi Juan, I saw the discussion in users-list: http://lists.ovirt.org/pipermail/users/2017-April/081618.html and I'm curious about how to generate the Swagger specfication of existing oVirt API (or maybe can generate by ovirt-engine-api-model?). Could you give me some advices on the generating tools or maybe some points to change during the procedure of building ovirt-engine? Michael