Restrict snap publication to non-stable channels

[Evan]

The Launchpad builders should not allow publishing to a stable channel. We don't want automated systems releasing into stable.

[Nicholas Skaggs (nskaggs)]

If this occurs, it will make snap package releases more difficult for users of lp builders. I imagine folks will build the snaps with launchpad, then have to download each one, and then upload themselves? What is the intended practice for using lp builders?

I get not wanting to let folks shoot themselves in the foot, but I'm curious why this feature needs removed.

[Colin Watson (cjwatson)]

No, not at all. The intent is that LP releases to edge automatically, and that developers then promote those builds to more stable channels once they've been tested; that doesn't require reuploading, just "snapcraft release".

[Nicholas Skaggs (nskaggs)]

Will beta channel remain? If folks are like myself, edge is just tip and really unversioned -- it will never release. Beta and up we'd seek to roll builds down for releasing.