netcdf-c Support scalars in Zarr

Quick patch for https://github.com/Unidata/netcdf-c/issues/3108.

This PR relies on .zarray having chunk and shape keys that are empty arrays, also checking if .zattrs contains an empty array for _ARRAY_DIMENSIONS. Under this assumptions we can treat the variable as a scalar instead of ignoring as it is being done.

Mar 11 '25 16:03 mannreis

Could you indent the contents of the new conditional, and un-dedent the else line and closing curly brace? The current indentation makes parsing the meaning more involved.

Mar 11 '25 22:03 DWesl

Looks great! I am getting https://github.com/Unidata/netcdf-c/pull/3086/ merged in now that I've figured out the Fortran issue, and after I pull that in I will get this.

Mar 19 '25 16:03 WardF

Thanks for your patience; now that netCDF-Fortran v4.6.2 is out, and the docker work for regression testing has been integrated, I'm happy to say we're starting to get the backlog cleared!

Apr 02 '25 21:04 WardF

Thanks for the updates! Tests are still missing here so I've started to work on it https://github.com/Unidata/netcdf-c/pull/3118

Apr 03 '25 12:04 mannreis

Thanks for the updates! Tests are still missing here so I've started to work on it #3118

Sounds good! I've got this pinned for review.

Apr 16 '25 19:04 WardF