BLD: Add pyproject.toml

[DWesl]

This might close #237 by specifying NumPy as a build dependency before starting the setup script.

I moved as much configuration to pyproject.toml as I could as an initial step to converting the build to a system available on Python 3.12.

[VascoSch92]

You could also deplace the requirements.txt inside the pyproject ;)

[DWesl]

As in, delete line 55 of pyproject.toml and move the contents of requirements.txt into `[project].dependencies?

wrf-python/setup.py

Lines 61 to 73 in cec1f70

	on_rtd = os.environ.get("READTHEDOCS", None) == "True"
	# on_rtd=True
	if on_rtd:
	if sys.version_info < (3, 3):
	requirements = ["mock"] # for python2 and python < 3.3
	else:
	requirements = [] # for >= python3.3
	ext_modules = []
	else:
	# Place install_requires into the text file "requirements.txt"
	with open("requirements.txt") as f2:
	requirements = f2.read().strip().splitlines()

I meant to ask earlier how important installing only mock on RTD was.
The specification doesn't seem to allow conditioning requirements on environment variables, and I'm not sure TOML does either, unless there's a way for wrf-python[rtd] to have fewer dependencies than wrf-python.

[VascoSch92]

As in, delete line 55 of pyproject.toml and move the contents of requirements.txt into `[project].dependencies?

Yes, probably you should also change pip install -r requirements.txt in pip install -r . everywhere

[DWesl]

Yes, probably you should also change pip install -r requirements.txt in pip install -r . everywhere

It seems someone already did that: setup.py and MANIFEST.in were the only places to mention requirements.txt

[kafitzgerald]

Thanks for the PR!

I was hoping to get this updated and merged yesterday, but need to need to look into why the Ubuntu CI checks are failing.
I'll try to take a deeper look later this week or next unless someone beats me to it.

[kafitzgerald]

Looks like the lingering failures were just a fluke w/ CI.

This all looks good to me.

[erogluorhan]

Great to see the issues of this pR have been fixed. Looks good to me