data/input has 8 gen2 repositories with test files used by the gen2 tests. obs_lsst does not depend on an external testdata package.

Jim Bosch the changes are mostly minor in obs_base to make it a bit more generic and in obs_lsst to make writeCuratedCalibrations work properly for defects and qe_curve. Doing this meant that I had to fix qe_curve in obs_lsst_data so that it matched the dataset type name rather than being slightly different. I talked to Simon Krughoff before doing that and we agreed that it's easier if the directory in obs_*_data packages matches the dataset type name. Simon Krughoff would you mind looking at the obs_lsst_data and pipe_tasks pull requests? They are trivial renames so it's not critical that you look.

One final point, I've changed obs_base so that you can convert multiple gen2 repos into a single gen3 repo. I can back that change out if you don't like it. The main problem is that I have to catch all exceptions from inserting of dimension data and registering instruments. This might not be a good idea. I have demonstrated that it works but the testing infrastructure in obs_base makes it hard to test it at the moment.

Looks great. Thanks for fixing that Tim Jenness.

One final point, I've changed obs_base so that you can convert multiple gen2 repos into a single gen3 repo. I can back that change out if you don't like it. The main problem is that I have to catch all exceptions from inserting of dimension data and registering instruments. This might not be a good idea. I have demonstrated that it works but the testing infrastructure in obs_base makes it hard to test it at the moment.

I'm happy to leave this at however far you've gotten it.  I suspect it's going to be subject to race conditions, but not being able to convert multiple Gen2 repos into a single Gen3 was such a big limitation that it would have hindered adoption of the script form, which would be bad.  We'll fix any concurrency issues later.