inherit environment variables that enable ABI3

[ocefpaf]

Closes #1461

We will need a post release after this one is merged.

[ocefpaf]

Seems to do the trick!:

-rw-r--r-- 1 runner runner 9.8M Jan  5 16:10 netcdf4-1.7.4-cp311-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
-rw-r--r-- 1 runner runner 9.7M Jan  5 16:11 netcdf4-1.7.4-cp311-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl

See https://github.com/Unidata/netcdf4-python/actions/runs/20720797112/job/59485979149?pr=1462

[jswhit]

Thanks @ocefpaf ! I've uploaded the manylinux abi3 wheels - wonder if I need to delete the existing cp311 wheels?

[ocefpaf]

Thanks @ocefpaf ! I've uploaded the manylinux abi3 wheels - wonder if I need to delete the existing cp311 wheels?

No idea what the install order is. I would delete to make it easy to debug possible issues. There are so many variables already, we do not want to ask users if they have the ABI3 or the non-ABI3.

[ocefpaf]

PS: A quick test show that on py311, where the ABI3 conflicts with the non-ABI3 wheel, the non-ABI3 will be installabled:

pip install netcdf4 
Collecting netcdf4
  Downloading netcdf4-1.7.4-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (2.1 kB)
Collecting cftime (from netcdf4)
  Downloading cftime-1.6.5-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.whl.metadata (8.7 kB)
Collecting certifi (from netcdf4)
  Downloading certifi-2026.1.4-py3-none-any.whl.metadata (2.5 kB)
Collecting numpy>=1.21.2 (from netcdf4)
  Downloading numpy-2.4.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (6.6 kB)
Downloading netcdf4-1.7.4-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl (10.4 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 10.4/10.4 MB 31.9 MB/s  0:00:00
Downloading numpy-2.4.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl (16.6 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 16.6/16.6 MB 38.9 MB/s  0:00:00
Downloading certifi-2026.1.4-py3-none-any.whl (152 kB)
Downloading cftime-1.6.5-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.whl (1.7 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.7/1.7 MB 35.9 MB/s  0:00:00
Installing collected packages: numpy, certifi, cftime, netcdf4
Successfully installed certifi-2026.1.4 cftime-1.6.5 netcdf4-1.7.4 numpy-2.4.0