snapcraft 2.43 snap can't access to HTTPS APT sources

The same error has been reported to me by someone else who uses custom repositories on their build machine.

I cannot get my hands on a 2.42 snapcraft snap to check whether it contained the https method and it was removed in 2.43.

https is indeed missing.
Fix comming.

https://github.com/snapcore/snapcraft/pull/2244

I suspect projects encountering this issue are not using a clean environment or adding remote sources (as in not part of Ubuntu) to the environment where things are building, is this a correct assessment?

I think so, although I haven't observed the issue firsthand.

@sergiusens

> is this a correct assessment?

Yes, as `snapcraft` happily runs on these environments I happened to make it run on my working system for smaller sized snaps like Snapcraft Template Plus and Tidy. This bug doesn't occur in other snaps I choose to run in LXD/Docker.

An example APT source that can trigger this issue is the Git Large File System's official repo, but any HTTPS APT source should do.

Thanks buo-ren-lin, I do have a fix and know how to trigger the regression, I am just looking for a very stable repo to use in a test to not re-introduce this regression. I would like to avoid create a fake https server for this as that would involved cert management among others.