Clone euxfel data file structure

[tmichela]

Add a little tool to generate EuXFEL data files by copying existing run data, but without any of the original data in the resulting files.

I made this originaly to build test for the exdf-tools as this is critical to test on real-like data from various cycles, but I thought this would be useful more generally, hence it ends up here.

[takluyver]

One more comment: naming!

I'd move this out of tests, since it's useful for things beyond EXtra-data's own tests.

gendata doesn't really describe what it does - it's not generating anything, and the output doesn't have most of the data. 😉 What about something like these options:

• extra_data.mkskeleton
• extra_data.mkemptyfiles
• extra_data.hollowfiles
• extra_data.stripfiles

[tmichela]

I'd move this out of tests

Fine with that, I though it is niche enough to hide it there, but 🤷

One more comment: naming!

yea, I gave it purposely a terrible name to get ideas back 😁
I don't have any particular preference, so if you have a favourite?

Maybe also to consider:
clone_empty
blanc_copy
empty_replica

[takluyver]

Or copy_structure, to give yet another option. I think that might be my favourite so far, but I don't have a strong preference.

[takluyver]

extra_data.copy_structure is still the name I like most so far, but I'd be OK with any of our suggestions if you're developing a preference.

Other than that, LGTM

[tmichela]

So I added support for soft/hard links anyway, if you want to have an other look at it.
(+ some bonus unit tests)

[takluyver]

Thanks, LGTM 👍

[tmichela]

thanks for the review! :)

[takluyver]

prnote: Add a development tool to copy the structure of EuXFEL data files without the data.