Move package to src/package

[sverhoeven]

On https://packaging.python.org/tutorials/packaging-projects/ the package is put in a src/ sub-directory. On https://blog.ionelmc.ro/2014/05/25/python-packaging/ there are arguments why this is a good idea.

[jspaaks]

I tried moving the template directory to under src/, but then I couldn't generate a project anymore due to a cookiecutter.exceptions.NonTemplatedInputDirException.

I subsequently looked at a bunch of cookiecutter-template repos to see how they did it. Hardly any use the src or src-like patttern. Here's one https://github.com/better-go/cookiecutter-go. From its readme, I was able to run our template using an extra argument --directory

cookiecutter ~/github/nlesc/python-template --directory src

I also had to move hooks and cookiecutter.json into src for it to work but that's ok i guess.

Sidenote: the config from setup.cfg suggested at https://packaging.python.org/tutorials/packaging-projects/#configuring-metadata didn't seem to matter much when running with cookiecutter <template dir>. Maybe it would work better if you're using cookiecutter as a library from python code.

See result here #203

Overall, this isn't worth it to me, I prefer to stick to what we had before, i.e. the template directory in the root of this project

[sverhoeven]

I did not explain myself well enough.
At the moment in this repo we have

{{cookiecutter.project_name}}/{{cookiecutter.package_name}}/__init__.py 

to use the structure of https://packaging.python.org/tutorials/packaging-projects/ it would have to be changed to

{{cookiecutter.project_name}}/src/{{cookiecutter.package_name}}/__init__.py 

So when a project (for example named my_python_package) is generated, its files would be:

• my_python_package/README.md
• my_python_package/setup.cfg
• my_python_package/src/my_python_package/init.py

See for example https://github.com/cjolowicz/cookiecutter-hypermodern-python/blob/main/%7B%7Bcookiecutter.project_name%7D%7D/src/%7B%7Bcookiecutter.package_name%7D%7D/__init__.py, however it does not use setuptools, but poetry so can not be copied fully.

[jspaaks]

ok, I'll see if I can make some changes