It's true, the scratch debs aren't currently sorted in any useful way.
For release branches like 2.6 and 2.7 we can invent meaningful version numbers, since we have just a single branch to think about and since commits within a branch are naturally ordered. But all non-release branches are mixed together in the scratch component of the buildbot's debian archive, so there's no natural way to have ordering between the debs there.
We could do slightly better by having a per-branch commit number in the debian package version number, but automatic upgrades still won't work since they'd happily skip to a different branch in the scratch repo.
The best advise i can give right now is this:
You can list the scratch debs available by running:
Code:
apt-cache policy linuxcnc
Or, if you're on rtpreempt or vanilla kernels:
Code:
apt-cache policy linuxcnc-uspace
Once you know the version of the deb you want you can get it in and install it in one step, like this:
Code:
apt-get install linuxcnc=${VERSION}
For example:
Code:
apt-get install linuxcnc-uspace=2.8.0~pre1.ja~joints.axes14~42d81ae
I hope this helps a little.
