Some packaging improvements

[valeriupredoi]

hi @bnlawrence awesome little tool! Here are a couple minor package improvements 🍺

• add .gitignore file to stash unwanted crap
• add dedicated conda deps file environment.yml
• add a barebones GA test
• mod setup.py to hold all needed deps

[bnlawrence]

Black magic. What exactly is the nightly test doing? Just testing it builds ok?

[valeriupredoi]

yes, it builds the environment, installs the tool, then it checks a basic s3view --help and which s3view - of course, this will contain at least a pytest -n 2 as soon as unit/integration tests become available

[bnlawrence]

I'd quite like to put dependencies on particular branches (for now), that I'd do like this with pip:
pip install git+https://github.com/davidhassell/cfdm.git@h5-read-hdf5-chunks-hack, how would we do that?

[valeriupredoi]

here is how it's done: here, with the main branch of the main repo, change as you like 3d11bf4

[valeriupredoi]

nay bother, did that for you in last commit a8f1611

[bnlawrence]

Am happy to go with this, once we've worked out how to do the correct dependencies

[valeriupredoi]

Am happy to go with this, once we've worked out how to do the correct dependencies

cheers @bnlawrence - here's how to do it 3d11bf4 with that dev branch of CFDM added in a8f1611
Change as you please 😁 To note also to @davidhassell that the PyPI recipe will mean the user installs udunits2 separately 👍 (which I took care of here in our conda env)

[valeriupredoi]

@bnlawrence I have just retired the use of Mambaforge (being sunsetted right now, retired fully in January 2025) - you good to merge this PR? 🍺