Repository: pypa/sample-namespace-packages
Branch: master
Commit: 134414420e5f
Files: 35
Total size: 51.8 KB

Directory structure:
gitextract_kazeylgz/

├── .github/
│   └── workflows/
│       └── ci.yml
├── .gitignore
├── .python-versions-used
├── LICENSE
├── README.md
├── constraints.txt
├── legacy_table.md
├── native/
│   ├── pkg_a/
│   │   ├── example_pkg/
│   │   │   └── a/
│   │   │       └── __init__.py
│   │   ├── pyproject.toml
│   │   └── setup.py
│   └── pkg_b/
│       ├── example_pkg/
│       │   └── b/
│       │       └── __init__.py
│       ├── pyproject.toml
│       └── setup.py
├── noxfile.py
├── pkg_resources/
│   ├── pkg_a/
│   │   ├── example_pkg/
│   │   │   ├── __init__.py
│   │   │   └── a/
│   │   │       └── __init__.py
│   │   ├── pyproject.toml
│   │   └── setup.py
│   └── pkg_b/
│       ├── example_pkg/
│       │   ├── __init__.py
│       │   └── b/
│       │       └── __init__.py
│       ├── pyproject.toml
│       └── setup.py
├── pkgutil/
│   ├── README.md
│   ├── pkg_a/
│   │   ├── example_pkg/
│   │   │   ├── __init__.py
│   │   │   └── a/
│   │   │       └── __init__.py
│   │   ├── pyproject.toml
│   │   └── setup.py
│   └── pkg_b/
│       ├── example_pkg/
│       │   ├── __init__.py
│       │   └── b/
│       │       └── __init__.py
│       ├── pyproject.toml
│       └── setup.py
├── report_to_table.py
├── requirements.txt
├── table.md
└── verify_packages.py

================================================
FILE CONTENTS
================================================

================================================
FILE: .github/workflows/ci.yml
================================================
name: CI
on:
  push:
    branches: ["master", "src-layout"]
  pull_request:
    branches: ["master", "src-layout"]
  schedule:
    - cron: "0 12 1 * *"

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
  cancel-in-progress: true

jobs:
  generate-compatibility-matrix:
    name: >-
      Check for any uncommitted
      table alteration
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Determine Python versions
      run: |
        {
          echo 'PYTHON_VERSIONS<<EOF'
          cat  '.python-versions-used'
          echo 'EOF'
        } >> $GITHUB_ENV
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ env.PYTHON_VERSIONS }}
    - name: Install dependencies
      run: |
        python -m pip install -r requirements.txt
    - name: Generate compatibility matrix with nox
      continue-on-error: true
      run: |
        python -m nox --report report.json
    - name: Verify table has not been altered
      run: |
        set -xeEuo pipefail
        cat report.json
        python report_to_table.py
        echo 'DIFF_FOR_TABLE<<EOF' >> "${GITHUB_OUTPUT}"
        git diff table.md | tee -a "${GITHUB_OUTPUT}"
        echo 'EOF' >> "${GITHUB_OUTPUT}"
      id: verify-table
    - name: Fail the job if the committed table differs from the calculated one
      if: steps.verify-table.outputs.DIFF_FOR_TABLE != ''
      run: |
        echo "::error file=table.md::Table has been altered but not committed!"
        exit 1


================================================
FILE: .gitignore
================================================
dist
build
__pycache__
*.pyc
*.egg-info
.nox
report.json


================================================
FILE: .python-versions-used
================================================
3.8
3.10
3.12


================================================
FILE: LICENSE
================================================
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================================================
FILE: README.md
================================================
# Python Namespace Package Examples

This repository contains samples for the various ways to create namespace
packages in Python. For more details, see the
[documentation on namespace packages](https://packaging.python.org/namespace_packages/)


## Testing
This repo also contains testing tools to exercise installation scenarios for
namespace packages.

To run the scenarios:

```
$ pip install -r requirements.txt
$ nox --report report.json
```

`nox` will execute all of the scenarios and report whether the namespace
packages are able to be imported successfully after installation. You can
use `python report_to_table.py` to transform the report into a
markdown-friendly table.

# Current status

To see the status since the last time the scenarios were run open [table.md](table.md)[^1].

Please note:
* Mixing package types within a single namespace is not supported. While it may work in some cases, it may also break depending on the software versions used, the install commands issued, or the order of commands. It is generally advisable not to mix types.
* The `pkg_resources` method of namspacing is [deprecated](https://setuptools.pypa.io/en/latest/pkg_resources.html).
  Whenever possible, developers are encouraged to migrate away from it.
* [PEP 420](https://www.python.org/dev/peps/pep-0420/) was accepted as part of Python 3.3. For wider compatibility (going back to Python 2.3), use the `pkgutil` method.
* Zipped eggs don't play nicely with namespace packaging, and may be implicitly installed by commands like `python setup.py install`. To prevent this, it is recommended that you set [`zip_safe=False`](http://setuptools.readthedocs.io/en/latest/setuptools.html#setting-the-zip-safe-flag) in `setup.py`, as we do here. Please also note that distributing packages via egg files is considered deprecated.
* The tests reported in [table.md](table.md) use `pip` with *build isolation* and build-backend APIs.
  This is triggered by the presence of a `pyproject.toml` file in each package source directory.
  If your package does not have a `pyproject.toml` file,
  `pip` might select a legacy (and deprecated) installation procedure, which can behave differently.

# Remarks on staggered migrations

It is difficult migrate away from deprecated `pkg_resources` namepaces in large projects.
Ideally, all packages sharing a namespace should coordinate and simultaneously drop `__init__.py` files to conform with PEP 420.
However, developers might be interested in carrying out a *staggered migration* plan and temporarily mix different namespacing techniques
to mitigate the migration effort and spread the work load in time.

Based on the results for the scenarios mixing `pkg_resources` and other namespace methods reported in
[table.md](table.md) and [legacy_table.md](legacy_table.md),
we can see that (in principle) a staggered migration plan can be successful,
as long as the developers are willing to accept some limitations:

- Deprecated installation methods will not be supported (e.g. `python setup.py install`),
- Editable installations will not be supported.

Please note, however, that these are preliminary studies.
Developers should carry out an independent investigation, and check for the
specific use cases they are interested in supporting.


[^1]: If you would like to know about deprecated installation methods (e.g. via
  `python setup.py install`) or Python 2.7, please have a look at [legacy_table.md](legacy_table.md).


================================================
FILE: constraints.txt
================================================
setuptools >= 68.2.2
wheel >= 0.42.0

================================================
FILE: legacy_table.md
================================================
| Type | Interpreter | Package A command | Package B command | Status |
| --- | --- | --- | --- | --- |
| pkgutil | python2.7 | pip install . | pip install . | ✅ |
| pkgutil | python2.7 | pip install . | pip install -e . | ✅ |
| pkgutil | python2.7 | pip install . | python setup.py install | ✅ |
| pkgutil | python2.7 | pip install . | python setup.py develop | ✅ |
| pkgutil | python2.7 | pip install -e . | pip install . | ✅ |
| pkgutil | python2.7 | pip install -e . | pip install -e . | ✅ |
| pkgutil | python2.7 | pip install -e . | python setup.py install | ✅ |
| pkgutil | python2.7 | pip install -e . | python setup.py develop | ✅ |
| pkgutil | python2.7 | python setup.py install | pip install . | ✅ |
| pkgutil | python2.7 | python setup.py install | pip install -e . | ✅ |
| pkgutil | python2.7 | python setup.py install | python setup.py install | ✅ |
| pkgutil | python2.7 | python setup.py install | python setup.py develop | ✅ |
| pkgutil | python2.7 | python setup.py develop | pip install . | ✅ |
| pkgutil | python2.7 | python setup.py develop | pip install -e . | ✅ |
| pkgutil | python2.7 | python setup.py develop | python setup.py install | ✅ |
| pkgutil | python2.7 | python setup.py develop | python setup.py develop | ✅ |
| pkgutil | python3.7 | pip install . | pip install . | ✅ |
| pkgutil | python3.7 | pip install . | pip install -e . | ✅ |
| pkgutil | python3.7 | pip install . | python setup.py install | ✅ |
| pkgutil | python3.7 | pip install . | python setup.py develop | ✅ |
| pkgutil | python3.7 | pip install -e . | pip install . | ✅ |
| pkgutil | python3.7 | pip install -e . | pip install -e . | ✅ |
| pkgutil | python3.7 | pip install -e . | python setup.py install | ✅ |
| pkgutil | python3.7 | pip install -e . | python setup.py develop | ✅ |
| pkgutil | python3.7 | python setup.py install | pip install . | ✅ |
| pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |
| pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |
| pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |
| pkgutil | python3.7 | python setup.py develop | pip install . | ✅ |
| pkgutil | python3.7 | python setup.py develop | pip install -e . | ✅ |
| pkgutil | python3.7 | python setup.py develop | python setup.py install | ✅ |
| pkgutil | python3.7 | python setup.py develop | python setup.py develop | ✅ |
| pkg_resources | python2.7 | pip install . | pip install . | ✅ |
| pkg_resources | python2.7 | pip install . | pip install -e . | ✅ |
| pkg_resources | python2.7 | pip install . | python setup.py install | ❌ |
| pkg_resources | python2.7 | pip install . | python setup.py develop | ✅ |
| pkg_resources | python2.7 | pip install -e . | pip install . | ✅ |
| pkg_resources | python2.7 | pip install -e . | pip install -e . | ✅ |
| pkg_resources | python2.7 | pip install -e . | python setup.py install | ❌ |
| pkg_resources | python2.7 | pip install -e . | python setup.py develop | ✅ |
| pkg_resources | python2.7 | python setup.py install | pip install . | ❌ |
| pkg_resources | python2.7 | python setup.py install | pip install -e . | ❌ |
| pkg_resources | python2.7 | python setup.py install | python setup.py install | ✅ |
| pkg_resources | python2.7 | python setup.py install | python setup.py develop | ❌ |
| pkg_resources | python2.7 | python setup.py develop | pip install . | ✅ |
| pkg_resources | python2.7 | python setup.py develop | pip install -e . | ✅ |
| pkg_resources | python2.7 | python setup.py develop | python setup.py install | ❌ |
| pkg_resources | python2.7 | python setup.py develop | python setup.py develop | ✅ |
| pkg_resources | python3.7 | pip install . | pip install . | ✅ |
| pkg_resources | python3.7 | pip install . | pip install -e . | ✅ |
| pkg_resources | python3.7 | pip install . | python setup.py install | ❌ |
| pkg_resources | python3.7 | pip install . | python setup.py develop | ✅ |
| pkg_resources | python3.7 | pip install -e . | pip install . | ✅ |
| pkg_resources | python3.7 | pip install -e . | pip install -e . | ✅ |
| pkg_resources | python3.7 | pip install -e . | python setup.py install | ❌ |
| pkg_resources | python3.7 | pip install -e . | python setup.py develop | ✅ |
| pkg_resources | python3.7 | python setup.py install | pip install . | ❌ |
| pkg_resources | python3.7 | python setup.py install | pip install -e . | ❌ |
| pkg_resources | python3.7 | python setup.py install | python setup.py install | ✅ |
| pkg_resources | python3.7 | python setup.py install | python setup.py develop | ❌ |
| pkg_resources | python3.7 | python setup.py develop | pip install . | ✅ |
| pkg_resources | python3.7 | python setup.py develop | pip install -e . | ✅ |
| pkg_resources | python3.7 | python setup.py develop | python setup.py install | ❌ |
| pkg_resources | python3.7 | python setup.py develop | python setup.py develop | ✅ |
| pep420 | python2.7 | pip install . | pip install . | ❌ |
| pep420 | python2.7 | pip install . | pip install -e . | ❌ |
| pep420 | python2.7 | pip install . | python setup.py install | ❌ |
| pep420 | python2.7 | pip install . | python setup.py develop | ❌ |
| pep420 | python2.7 | pip install -e . | pip install . | ❌ |
| pep420 | python2.7 | pip install -e . | pip install -e . | ❌ |
| pep420 | python2.7 | pip install -e . | python setup.py install | ❌ |
| pep420 | python2.7 | pip install -e . | python setup.py develop | ❌ |
| pep420 | python2.7 | python setup.py install | pip install . | ❌ |
| pep420 | python2.7 | python setup.py install | pip install -e . | ❌ |
| pep420 | python2.7 | python setup.py install | python setup.py install | ❌ |
| pep420 | python2.7 | python setup.py install | python setup.py develop | ❌ |
| pep420 | python2.7 | python setup.py develop | pip install . | ❌ |
| pep420 | python2.7 | python setup.py develop | pip install -e . | ❌ |
| pep420 | python2.7 | python setup.py develop | python setup.py install | ❌ |
| pep420 | python2.7 | python setup.py develop | python setup.py develop | ❌ |
| pep420 | python3.7 | pip install . | pip install . | ✅ |
| pep420 | python3.7 | pip install . | pip install -e . | ✅ |
| pep420 | python3.7 | pip install . | python setup.py install | ✅ |
| pep420 | python3.7 | pip install . | python setup.py develop | ✅ |
| pep420 | python3.7 | pip install -e . | pip install . | ✅ |
| pep420 | python3.7 | pip install -e . | pip install -e . | ✅ |
| pep420 | python3.7 | pip install -e . | python setup.py install | ✅ |
| pep420 | python3.7 | pip install -e . | python setup.py develop | ✅ |
| pep420 | python3.7 | python setup.py install | pip install . | ✅ |
| pep420 | python3.7 | python setup.py install | pip install -e . | ✅ |
| pep420 | python3.7 | python setup.py install | python setup.py install | ✅ |
| pep420 | python3.7 | python setup.py install | python setup.py develop | ✅ |
| pep420 | python3.7 | python setup.py develop | pip install . | ✅ |
| pep420 | python3.7 | python setup.py develop | pip install -e . | ✅ |
| pep420 | python3.7 | python setup.py develop | python setup.py install | ✅ |
| pep420 | python3.7 | python setup.py develop | python setup.py develop | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | pip install . | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install . | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install . | python setup.py develop | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | python setup.py develop | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | python setup.py install | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | python setup.py develop | ✅ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | python setup.py develop | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python3.7 | pip install . | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install . | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install . | python setup.py develop | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | python setup.py develop | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | pip install -e . | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | python setup.py install | ❌ |
| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | python setup.py develop | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install . | pip install . | ✅ |
| cross_pep420_pkgutil | python2.7 | pip install . | pip install -e . | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install . | python setup.py install | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install . | python setup.py develop | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install -e . | pip install . | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install -e . | pip install -e . | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install -e . | python setup.py install | ❌ |
| cross_pep420_pkgutil | python2.7 | pip install -e . | python setup.py develop | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py install | pip install . | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py install | pip install -e . | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py install | python setup.py install | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py install | python setup.py develop | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py develop | pip install . | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py develop | pip install -e . | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py develop | python setup.py install | ❌ |
| cross_pep420_pkgutil | python2.7 | python setup.py develop | python setup.py develop | ❌ |
| cross_pep420_pkgutil | python3.7 | pip install . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install . | python setup.py install | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install . | python setup.py develop | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install -e . | python setup.py install | ✅ |
| cross_pep420_pkgutil | python3.7 | pip install -e . | python setup.py develop | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py install | pip install . | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py develop | pip install . | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py develop | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py develop | python setup.py install | ✅ |
| cross_pep420_pkgutil | python3.7 | python setup.py develop | python setup.py develop | ✅ |


================================================
FILE: native/pkg_a/example_pkg/a/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'a'


================================================
FILE: native/pkg_a/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: native/pkg_a/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup


setup(
    name='example_pkg_a',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=['example_pkg.a'],
    zip_safe=False,
)


================================================
FILE: native/pkg_b/example_pkg/b/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'b'


================================================
FILE: native/pkg_b/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: native/pkg_b/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup


setup(
    name='example_pkg_b',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=['example_pkg.b'],
    zip_safe=False,
)


================================================
FILE: noxfile.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import nox

HERE = os.path.abspath(os.path.dirname(__file__))

# -- REQUIRES: nox >= 2023.04.22
# SEE: https://nox.thea.codes/en/stable/index.html
USE_PYTHON_VERSIONS = os.environ.get("NOXFILE_PYTHON_VERSIONS", "").split()
if not USE_PYTHON_VERSIONS:
    with open(os.path.join(HERE, ".python-versions-used"), "r") as file:
        USE_PYTHON_VERSIONS = [x.strip() for x in file]


install_commands = (("pip", "install", "."), ("pip", "install", "-e", "."))


def install_packages(session, package_a, package_b, command_a, command_b):
    env = {**os.environ, "PIP_CONSTRAINT": f"{HERE}/constraints.txt"}
    session.install("--upgrade", "pip", env=env)
    session.chdir(package_a)
    session.run("rm", "-rf", "dist", "build", "*.egg-info")
    session.run(*command_a, env=env)
    session.chdir(HERE)
    session.chdir(package_b)
    session.run("rm", "-rf", "dist", "build", "*.egg-info")
    session.run(*command_b, env=env)
    session.chdir(HERE)


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize("command_a", install_commands)
@nox.parametrize("command_b", install_commands)
def session_pkgutil(session, command_a, command_b):
    install_packages(session, "pkgutil/pkg_a", "pkgutil/pkg_b", command_a, command_b)
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize("command_a", install_commands)
@nox.parametrize("command_b", install_commands)
def session_pkg_resources(session, command_a, command_b):
    install_packages(
        session, "pkg_resources/pkg_a", "pkg_resources/pkg_b", command_a, command_b
    )
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize("command_a", install_commands)
@nox.parametrize("command_b", install_commands)
def session_pep420(session, command_a, command_b):
    install_packages(session, "native/pkg_a", "native/pkg_b", command_a, command_b)
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize("command_a", install_commands)
@nox.parametrize("command_b", install_commands)
def session_cross_pkg_resources_pkgutil(session, command_a, command_b):
    install_packages(
        session, "pkg_resources/pkg_a", "pkgutil/pkg_b", command_a, command_b
    )
    session.run("python", "-m", "pip", "list")
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize("command_a", install_commands)
@nox.parametrize("command_b", install_commands)
def session_cross_pep420_pkgutil(session, command_a, command_b):
    install_packages(session, "native/pkg_a", "pkgutil/pkg_b", command_a, command_b)
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize('command_a', install_commands)
@nox.parametrize('command_b', install_commands)
def session_cross_pep420_pkg_resources(session, command_a, command_b):
    install_packages(
        session, 'native/pkg_a', 'pkg_resources/pkg_b', command_a, command_b
    )
    session.run("python", "verify_packages.py")


@nox.session(python=USE_PYTHON_VERSIONS)
@nox.parametrize('command_a', install_commands)
@nox.parametrize('command_b', install_commands)
def session_cross_pkg_resources_pep420(session, command_a, command_b):
    install_packages(
        session, 'pkg_resources/pkg_a', 'native/pkg_b', command_a, command_b
    )
    session.run("python", "verify_packages.py")


================================================
FILE: pkg_resources/pkg_a/example_pkg/__init__.py
================================================
__import__('pkg_resources').declare_namespace(__name__)


================================================
FILE: pkg_resources/pkg_a/example_pkg/a/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'a'


================================================
FILE: pkg_resources/pkg_a/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: pkg_resources/pkg_a/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup, find_packages


setup(
    name='example_pkg_a',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=find_packages(),
    namespace_packages=['example_pkg'],
    zip_safe=False,
)


================================================
FILE: pkg_resources/pkg_b/example_pkg/__init__.py
================================================
__import__('pkg_resources').declare_namespace(__name__)


================================================
FILE: pkg_resources/pkg_b/example_pkg/b/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'b'


================================================
FILE: pkg_resources/pkg_b/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: pkg_resources/pkg_b/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup, find_packages


setup(
    name='example_pkg_b',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=find_packages(),
    namespace_packages=['example_pkg'],
    zip_safe=False,
)


================================================
FILE: pkgutil/README.md
================================================
# [pkgutil-style namespace packages](https://packaging.python.org/guides/packaging-namespace-packages/#pkgutil-style-namespace-packages)

The following examples demonstrates the usage / installation of `pkgutil` style namespace packages. 

```
pkgutil/
├ pkg_a/               # the name of this dir doesn't matter
│  ├ setup.py
│  └ example_pkg/      # namespace package name
│      ├__init__.py    # special pkgutil namespace __init__.py
│      └ a/            # dir name must match the package name from `setup.py`
│        └ __init__.py
│        ├ module1.py
.
.
.
└ pkg_b/
```

The anatomy of a namespace package name is `<namespaceA>.<package_name>`.
Namespaces can also be nested an take the form `<namespaceA>.<namespace_N>.<package_name>`.

This subdirectory contains two packages (`"a"` & `"b"`) that share the namespace `example_pkg`.
When installed these packages will have the names `example_pkg.a` & `example_pkg.b` respectively.

### Detailed Requirements
The directories `pkg_a` and `pkg_b` in this subdirectory contain two different python packages. 
The names of these directories have no effect on the installed package.

Each of these directories should at least contain:
1.  A configuration file, in this case `setup.py`.
2.  A directory, whose name determines the namespace name.

In this example `example_pkg` is the name of the namespace. This directory should contain:
1. The `__init__.py` file for the namespace package, which must contain only the following:
    ```python
    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
    ```
    Nested namespaces must contain an identical `__init__.py`.

2. A directory, whose name determines the `package_name`. This directory holds the package's source code.
    - The directory name, must match the name given in the `setup.py`.

### Practical Usage
When using namespace packages, it is helpful to understand that the delimiter between the 
`namespace` and the `package_name` is not consistent throughout common python workflows.

For example, here is how to reference the namespace package `"a"` from this repository.
- Creating your namespace package with setuptools in `setup.py`:
    - `setup(name="example_pkg_a")`
- Installing / Uninstalling a namespace package with `pip`:
    - `pip install example-pkg-a`
- Importing a namespace package with`python`:
    - `import example_pkg.a`

From the root directory, running the following command will install a package called `example_pkg.a`.

```bash
cd pkgutil/pkg_a

python -m pip install .

# Test the install by printing the `name` from the `__init__.py` file.
python -c "import example_pkg.a as a; print(a.name)"
```


================================================
FILE: pkgutil/pkg_a/example_pkg/__init__.py
================================================
__path__ = __import__('pkgutil').extend_path(__path__, __name__)


================================================
FILE: pkgutil/pkg_a/example_pkg/a/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'a'


================================================
FILE: pkgutil/pkg_a/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: pkgutil/pkg_a/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup, find_packages


setup(
    name='example_pkg_a',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=find_packages(),
    zip_safe=False,
)


================================================
FILE: pkgutil/pkg_b/example_pkg/__init__.py
================================================
__path__ = __import__('pkgutil').extend_path(__path__, __name__)


================================================
FILE: pkgutil/pkg_b/example_pkg/b/__init__.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name = 'b'


================================================
FILE: pkgutil/pkg_b/pyproject.toml
================================================
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"


================================================
FILE: pkgutil/pkg_b/setup.py
================================================
# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from setuptools import setup, find_packages


setup(
    name='example_pkg_b',

    version='1',

    description='',
    long_description='',

    author='Jon Wayne Parrott',
    author_email='jonwayne@google.com',

    license='Apache Software License',

    packages=find_packages(),
    zip_safe=False,
)


================================================
FILE: report_to_table.py
================================================
#!/usr/bin/python
# -*- coding: utf-8 -*-

import io
import json


with io.open('report.json', 'r') as f:
    data = json.load(f)

with io.open('table.md', 'w') as f:
    f.write('| Type | Interpreter | Package A command | Package B command | Status |\n')
    f.write('| --- | --- | --- | --- | --- |\n')
    for session in data['sessions']:
        session_name = session['name']
        session_detailled_name = session['signatures'][-1]
        session_interpreter = session_detailled_name.replace(session_name + "-", "python")
        # TODO: Replace with `str.removeprefix()` in Python 3.12
        session_name = session_name[len("session_") :]

        f.write('| {} | {} | {} | {} | {} |\n'.format(
            session_name,
            session_interpreter,
            ' '.join(session['args']['command_a']),
            ' '.join(session['args']['command_b']),
            '✅' if session['result_code'] else '❌'
        ))


================================================
FILE: requirements.txt
================================================
# -- PYTHON PACKAGE REQUIREMENTS:
# USE: pip install -r <THIS_FILE>

nox >= 2023.04.22


================================================
FILE: table.md
================================================
| Type | Interpreter | Package A command | Package B command | Status |
| --- | --- | --- | --- | --- |
| pkgutil | python3.8 | pip install . | pip install . | ✅ |
| pkgutil | python3.8 | pip install . | pip install -e . | ✅ |
| pkgutil | python3.8 | pip install -e . | pip install . | ✅ |
| pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |
| pkgutil | python3.10 | pip install . | pip install . | ✅ |
| pkgutil | python3.10 | pip install . | pip install -e . | ✅ |
| pkgutil | python3.10 | pip install -e . | pip install . | ✅ |
| pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |
| pkgutil | python3.12 | pip install . | pip install . | ✅ |
| pkgutil | python3.12 | pip install . | pip install -e . | ✅ |
| pkgutil | python3.12 | pip install -e . | pip install . | ✅ |
| pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |
| pkg_resources | python3.8 | pip install . | pip install . | ✅ |
| pkg_resources | python3.8 | pip install . | pip install -e . | ✅ |
| pkg_resources | python3.8 | pip install -e . | pip install . | ✅ |
| pkg_resources | python3.8 | pip install -e . | pip install -e . | ✅ |
| pkg_resources | python3.10 | pip install . | pip install . | ✅ |
| pkg_resources | python3.10 | pip install . | pip install -e . | ✅ |
| pkg_resources | python3.10 | pip install -e . | pip install . | ✅ |
| pkg_resources | python3.10 | pip install -e . | pip install -e . | ✅ |
| pkg_resources | python3.12 | pip install . | pip install . | ✅ |
| pkg_resources | python3.12 | pip install . | pip install -e . | ✅ |
| pkg_resources | python3.12 | pip install -e . | pip install . | ✅ |
| pkg_resources | python3.12 | pip install -e . | pip install -e . | ✅ |
| pep420 | python3.8 | pip install . | pip install . | ✅ |
| pep420 | python3.8 | pip install . | pip install -e . | ✅ |
| pep420 | python3.8 | pip install -e . | pip install . | ✅ |
| pep420 | python3.8 | pip install -e . | pip install -e . | ✅ |
| pep420 | python3.10 | pip install . | pip install . | ✅ |
| pep420 | python3.10 | pip install . | pip install -e . | ✅ |
| pep420 | python3.10 | pip install -e . | pip install . | ✅ |
| pep420 | python3.10 | pip install -e . | pip install -e . | ✅ |
| pep420 | python3.12 | pip install . | pip install . | ✅ |
| pep420 | python3.12 | pip install . | pip install -e . | ✅ |
| pep420 | python3.12 | pip install -e . | pip install . | ✅ |
| pep420 | python3.12 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.8 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python3.8 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.8 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.10 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python3.10 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.10 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.12 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pkgutil | python3.12 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pkgutil | python3.12 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.8 | pip install . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.8 | pip install . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.8 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.10 | pip install . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.10 | pip install . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.10 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.12 | pip install . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.12 | pip install . | pip install -e . | ✅ |
| cross_pep420_pkgutil | python3.12 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkg_resources | python3.8 | pip install . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.8 | pip install . | pip install -e . | ❌ |
| cross_pep420_pkg_resources | python3.8 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.8 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkg_resources | python3.10 | pip install . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.10 | pip install . | pip install -e . | ❌ |
| cross_pep420_pkg_resources | python3.10 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.10 | pip install -e . | pip install -e . | ✅ |
| cross_pep420_pkg_resources | python3.12 | pip install . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.12 | pip install . | pip install -e . | ❌ |
| cross_pep420_pkg_resources | python3.12 | pip install -e . | pip install . | ✅ |
| cross_pep420_pkg_resources | python3.12 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.8 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pep420 | python3.8 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.8 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pep420 | python3.8 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.10 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pep420 | python3.10 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.10 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pep420 | python3.10 | pip install -e . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.12 | pip install . | pip install . | ✅ |
| cross_pkg_resources_pep420 | python3.12 | pip install . | pip install -e . | ✅ |
| cross_pkg_resources_pep420 | python3.12 | pip install -e . | pip install . | ❌ |
| cross_pkg_resources_pep420 | python3.12 | pip install -e . | pip install -e . | ✅ |


================================================
FILE: verify_packages.py
================================================
from example_pkg import a
from example_pkg import b

print(a.name)
print(a.__path__)
print(b.name)
print(b.__path__)