I'd like to install a couple of packages available from an unofficial repository, problem is the repository share many packages and an apt upgrade would replace many of the official.
I know about pinning but would prefer not to use it.
I think to remember something about adding a repository for only a package, did a little search online and into apt's documentation but found not much, did also some test without success, if there's a syntax to add only few packages from a repository that would be perfect.
Alternatively I'm thinking about using cron and reprepro (or whatever is used nowadays to create a repository) to only mirror the few packages I need, anything already existing like that?