Use a single namespace and subpackages

[j-rivero]

The PR moves the current packages under a common native namespace named sdformat_mjcf.

With the change, we might want to reconsider the way of invoking our imports, probably need to work using the schema from sdformat_mjcf.sdformat_to_mjcf import foo since the installation using PYPI is probably installing the code using that directory layout. By now, things keep working since we are injecting PYTHONPATH in CI to point to the subpackages.

I've manually uploaded a test to test.pypi.org using the initial state of this PR https://test.pypi.org/project/sdformat-mjcf/. I'll send a second PR with the automated code for this.

[codecov[bot]]

Codecov Report

Merging #39 (ed9e471) into main (7f0a306) will increase coverage by 1.12%. The diff coverage is n/a.

:exclamation: Current head ed9e471 differs from pull request most recent head 12231f4. Consider uploading reports for the commit 12231f4 to get more accurate results

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
+ Coverage   96.94%   98.06%   +1.12%     
==========================================
  Files          11       22      +11     
  Lines         327     1187     +860     
==========================================
+ Hits          317     1164     +847     
- Misses         10       23      +13     

Impacted Files	Coverage Δ
...rmat_mjcf/sdformat_to_mjcf/sdformat_to_mjcf/cli.py	90.90% <ø> (ø)
...at_to_mjcf/sdformat_to_mjcf/converters/geometry.py	92.42% <ø> (ø)
...ormat_to_mjcf/sdformat_to_mjcf/converters/joint.py	96.92% <ø> (ø)
...ormat_to_mjcf/sdformat_to_mjcf/converters/light.py	100.00% <ø> (ø)
...format_to_mjcf/sdformat_to_mjcf/converters/link.py	100.00% <ø> (ø)
...at_to_mjcf/sdformat_to_mjcf/converters/material.py	100.00% <ø> (ø)
...ormat_to_mjcf/sdformat_to_mjcf/converters/model.py	100.00% <ø> (ø)
...format_to_mjcf/sdformat_to_mjcf/converters/root.py	100.00% <ø> (ø)
...ormat_to_mjcf/sdformat_to_mjcf/converters/world.py	100.00% <ø> (ø)
...dformat_to_mjcf/sdformat_to_mjcf/sdf_kinematics.py	94.73% <ø> (ø)
... and 23 more

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[j-rivero]

Right now both sdformat_to_mjcf and sdformat_mjcf_utils have a setup.py file. Do we need that if we're putting them all in one PyPI package?

Oh, that is right, I think we don't need to ship more setup.py than the one in root. I went a bit crazy and do the following in 12231f4:

• Get rid of the duplicate directories sdformat_to_mjcf/sdformat_to_mjcf move all files to the upper dir
• Remove all init.py but leave the ones in real packages, otherwise they are recognized as packages and installed
• Remove setup.py, LICENSE, README, setup.cfg, etc. from subpackages, leave just one in the root dir
• Change setup.py to install the sdformat2mjcf script in entry
• Change cli.py to get the new paths (TODO: we probably need to extend the new syntax in all files).

With this, I'm able to do the following:

> virtualenv foo && source foo/bin/activate && pip install .
> sdformat2mjcf

And python3 setup.py sdist bdist bdist_wheel output also looks good to me.

What I think it is missing:

• Change all the imports to the new layout sdformat_mfjc.$package
• Probably leave a single tox.ini file covering both packages

[azeey]

Okay, but now this puts files in the root directory gz-mujoco. We don't want gz-mujoco to be a python package. If we're putting them all in one package, we should just have sdformat_mjcf as the only directory in the root of the repo and no other files for now.

[azeey]

Replaced by #74