Implement meta-release files to be able to do release-upgrades

[germebl]

Hey everyone,

i did not tested yet if it changed since the articles date which i will name in a few sentences but i would like to see the meta-release files implemented to aptly so we are able to do release-upgrades based on our repository instead of ubuntu's, as some company networks just allow their own repositorys and no connection to the outer world.

The article i'm talking about:
https://serverfault.com/questions/1030687/perform-ubuntu-do-release-upgrade-using-a-local-aptly-mirror-missing-meta-rel

I've not tested aptly yet but cant see any information about that so requesting it without knowing, if it was implemented in the meantime.

Best regards