non-legacy namespace package

[bertsky]

The current legacy approach to namespace packaging does not work with development/editable installation. See OCR-D/ocrd_all#433

This PR fixes it for this package – analogous PRs to the other qurator repos will follow.

[vahidrezanezhad]

@bertsky
This pr fails with the following error for stand-alone eynollah:

from qurator.eynollah.cli import main
ModuleNotFoundError: No module named 'qurator'

[bertsky]

Indeed. I thought I had tested thoroughly. For the moment I'm puzzled.

[bertsky]

The strangest thing of all is that these imports actually do work, but not in the entrypoint:

>>> from qurator.eynollah.cli import main
>>> main
<Command main>

python -c "from qurator.eynollah.cli import main; main()" --help

Usage: -c [OPTIONS]

Options:
  -i, --image FILE                image filename
  -o, --out DIRECTORY             directory to write output xml data
                                  [required]
  -di, --dir_in DIRECTORY         directory of images
...

[bertsky]

ah, found it – will need to update the other PRs as well ...

[vahidrezanezhad]

@bertsky I believe we have made a mistake, and this PR should not be merged. The problem lies with the current setup file; eynollah still fails to find the qurator module. The reason for my initial justification is that if you have installed eynollah with a working setup file and then pull the new commits, you won't encounter the issue because the old installation has already created a correct SOURCES.txt file. However, if you delete the 'eynollah.egg-info' and 'build' directories and try to install eynollah with the latest setup file, you will encounter the problem.

[bertsky]

I just tried afresh (new clone, new venv) from main.

With pip install -e . && python -c "import qurator.eynollah" it works.

With pip uninstall eynollah && pip install . && python -c "import qurator.eynollah" it also works.

eynollah still fails to find the qurator module

Perhaps you have some of the other packages in qurator namespace installed without merging my PR (at that respective repository) so you end up with a mix of old and new style namespace packages again?

[vahidrezanezhad]

Yes you are right. With pip install -e . works. Thank you.