pypa / pypa/setuptools

`include_package_data` doesn't work with `find_namespace_packages`

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Description

I'm trying to use namespace package discovery together with package data, and those two seem to conflict?

Snippet of setup.cfg:

[options]
package_dir =
    =src
packages = find_namespace:
include_package_data = True

[options.packages.find]
where = src
include_package_data = True

Stdout of trying that:

python setup.py build_py
running build_py
package init file 'src/sphinxcontrib/__init__.py' not found (or not a regular file)
package init file 'src/sphinxcontrib/elements/theme/__init__.py' not found (or not a regular file)
package init file 'src/sphinxcontrib/elements/theme/static/__init__.py' not found (or not a regular file)

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the provided setup.cfg configuration and run python setup.py build_py to reproduce the missing __init__.py messages. Trace how find_namespace: and include_package_data are handled during the build. Done means namespace package discovery and package-data inclusion work together without those warnings.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
build-system
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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