[
  {
    "path": ".github/workflows/ci.yml",
    "content": "name: CI\non:\n  push:\n    branches: [\"master\", \"src-layout\"]\n  pull_request:\n    branches: [\"master\", \"src-layout\"]\n  schedule:\n    - cron: \"0 12 1 * *\"\n\npermissions:\n  contents: read\n\nconcurrency:\n  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}\n  cancel-in-progress: true\n\njobs:\n  generate-compatibility-matrix:\n    name: >-\n      Check for any uncommitted\n      table alteration\n    runs-on: ubuntu-latest\n    steps:\n    - uses: actions/checkout@v4\n    - name: Determine Python versions\n      run: |\n        {\n          echo 'PYTHON_VERSIONS<<EOF'\n          cat  '.python-versions-used'\n          echo 'EOF'\n        } >> $GITHUB_ENV\n    - name: Set up Python\n      uses: actions/setup-python@v5\n      with:\n        python-version: ${{ env.PYTHON_VERSIONS }}\n    - name: Install dependencies\n      run: |\n        python -m pip install -r requirements.txt\n    - name: Generate compatibility matrix with nox\n      continue-on-error: true\n      run: |\n        python -m nox --report report.json\n    - name: Verify table has not been altered\n      run: |\n        set -xeEuo pipefail\n        cat report.json\n        python report_to_table.py\n        echo 'DIFF_FOR_TABLE<<EOF' >> \"${GITHUB_OUTPUT}\"\n        git diff table.md | tee -a \"${GITHUB_OUTPUT}\"\n        echo 'EOF' >> \"${GITHUB_OUTPUT}\"\n      id: verify-table\n    - name: Fail the job if the committed table differs from the calculated one\n      if: steps.verify-table.outputs.DIFF_FOR_TABLE != ''\n      run: |\n        echo \"::error file=table.md::Table has been altered but not committed!\"\n        exit 1\n"
  },
  {
    "path": ".gitignore",
    "content": "dist\nbuild\n__pycache__\n*.pyc\n*.egg-info\n.nox\nreport.json\n"
  },
  {
    "path": ".python-versions-used",
    "content": "3.8\n3.10\n3.12\n"
  },
  {
    "path": "LICENSE",
    "content": "                                 Apache License\n                           Version 2.0, January 2004\n                        http://www.apache.org/licenses/\n\n   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n   1. Definitions.\n\n      \"License\" shall mean the terms and conditions for use, reproduction,\n      and distribution as defined by Sections 1 through 9 of this document.\n\n      \"Licensor\" shall mean the copyright owner or entity authorized by\n      the copyright owner that is granting the License.\n\n      \"Legal Entity\" shall mean the union of the acting entity and all\n      other entities that control, are controlled by, or are under common\n      control with that entity. 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  },
  {
    "path": "README.md",
    "content": "# Python Namespace Package Examples\n\nThis repository contains samples for the various ways to create namespace\npackages in Python. For more details, see the\n[documentation on namespace packages](https://packaging.python.org/namespace_packages/)\n\n\n## Testing\nThis repo also contains testing tools to exercise installation scenarios for\nnamespace packages.\n\nTo run the scenarios:\n\n```\n$ pip install -r requirements.txt\n$ nox --report report.json\n```\n\n`nox` will execute all of the scenarios and report whether the namespace\npackages are able to be imported successfully after installation. You can\nuse `python report_to_table.py` to transform the report into a\nmarkdown-friendly table.\n\n# Current status\n\nTo see the status since the last time the scenarios were run open [table.md](table.md)[^1].\n\nPlease note:\n* 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.\n* The `pkg_resources` method of namspacing is [deprecated](https://setuptools.pypa.io/en/latest/pkg_resources.html).\n  Whenever possible, developers are encouraged to migrate away from it.\n* [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.\n* 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.\n* The tests reported in [table.md](table.md) use `pip` with *build isolation* and build-backend APIs.\n  This is triggered by the presence of a `pyproject.toml` file in each package source directory.\n  If your package does not have a `pyproject.toml` file,\n  `pip` might select a legacy (and deprecated) installation procedure, which can behave differently.\n\n# Remarks on staggered migrations\n\nIt is difficult migrate away from deprecated `pkg_resources` namepaces in large projects.\nIdeally, all packages sharing a namespace should coordinate and simultaneously drop `__init__.py` files to conform with PEP 420.\nHowever, developers might be interested in carrying out a *staggered migration* plan and temporarily mix different namespacing techniques\nto mitigate the migration effort and spread the work load in time.\n\nBased on the results for the scenarios mixing `pkg_resources` and other namespace methods reported in\n[table.md](table.md) and [legacy_table.md](legacy_table.md),\nwe can see that (in principle) a staggered migration plan can be successful,\nas long as the developers are willing to accept some limitations:\n\n- Deprecated installation methods will not be supported (e.g. `python setup.py install`),\n- Editable installations will not be supported.\n\nPlease note, however, that these are preliminary studies.\nDevelopers should carry out an independent investigation, and check for the\nspecific use cases they are interested in supporting.\n\n\n[^1]: If you would like to know about deprecated installation methods (e.g. via\n  `python setup.py install`) or Python 2.7, please have a look at [legacy_table.md](legacy_table.md).\n"
  },
  {
    "path": "constraints.txt",
    "content": "setuptools >= 68.2.2\nwheel >= 0.42.0"
  },
  {
    "path": "legacy_table.md",
    "content": "| Type | Interpreter | Package A command | Package B command | Status |\n| --- | --- | --- | --- | --- |\n| pkgutil | python2.7 | pip install . | pip install . | ✅ |\n| pkgutil | python2.7 | pip install . | pip install -e . | ✅ |\n| pkgutil | python2.7 | pip install . | python setup.py install | ✅ |\n| pkgutil | python2.7 | pip install . | python setup.py develop | ✅ |\n| pkgutil | python2.7 | pip install -e . | pip install . | ✅ |\n| pkgutil | python2.7 | pip install -e . | pip install -e . | ✅ |\n| pkgutil | python2.7 | pip install -e . | python setup.py install | ✅ |\n| pkgutil | python2.7 | pip install -e . | python setup.py develop | ✅ |\n| pkgutil | python2.7 | python setup.py install | pip install . | ✅ |\n| pkgutil | python2.7 | python setup.py install | pip install -e . | ✅ |\n| pkgutil | python2.7 | python setup.py install | python setup.py install | ✅ |\n| pkgutil | python2.7 | python setup.py install | python setup.py develop | ✅ |\n| pkgutil | python2.7 | python setup.py develop | pip install . | ✅ |\n| pkgutil | python2.7 | python setup.py develop | pip install -e . | ✅ |\n| pkgutil | python2.7 | python setup.py develop | python setup.py install | ✅ |\n| pkgutil | python2.7 | python setup.py develop | python setup.py develop | ✅ |\n| pkgutil | python3.7 | pip install . | pip install . | ✅ |\n| pkgutil | python3.7 | pip install . | pip install -e . | ✅ |\n| pkgutil | python3.7 | pip install . | python setup.py install | ✅ |\n| pkgutil | python3.7 | pip install . | python setup.py develop | ✅ |\n| pkgutil | python3.7 | pip install -e . | pip install . | ✅ |\n| pkgutil | python3.7 | pip install -e . | pip install -e . | ✅ |\n| pkgutil | python3.7 | pip install -e . | python setup.py install | ✅ |\n| pkgutil | python3.7 | pip install -e . | python setup.py develop | ✅ |\n| pkgutil | python3.7 | python setup.py install | pip install . | ✅ |\n| pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |\n| pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |\n| pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |\n| pkgutil | python3.7 | python setup.py develop | pip install . | ✅ |\n| pkgutil | python3.7 | python setup.py develop | pip install -e . | ✅ |\n| pkgutil | python3.7 | python setup.py develop | python setup.py install | ✅ |\n| pkgutil | python3.7 | python setup.py develop | python setup.py develop | ✅ |\n| pkg_resources | python2.7 | pip install . | pip install . | ✅ |\n| pkg_resources | python2.7 | pip install . | pip install -e . | ✅ |\n| pkg_resources | python2.7 | pip install . | python setup.py install | ❌ |\n| pkg_resources | python2.7 | pip install . | python setup.py develop | ✅ |\n| pkg_resources | python2.7 | pip install -e . | pip install . | ✅ |\n| pkg_resources | python2.7 | pip install -e . | pip install -e . | ✅ |\n| pkg_resources | python2.7 | pip install -e . | python setup.py install | ❌ |\n| pkg_resources | python2.7 | pip install -e . | python setup.py develop | ✅ |\n| pkg_resources | python2.7 | python setup.py install | pip install . | ❌ |\n| pkg_resources | python2.7 | python setup.py install | pip install -e . | ❌ |\n| pkg_resources | python2.7 | python setup.py install | python setup.py install | ✅ |\n| pkg_resources | python2.7 | python setup.py install | python setup.py develop | ❌ |\n| pkg_resources | python2.7 | python setup.py develop | pip install . | ✅ |\n| pkg_resources | python2.7 | python setup.py develop | pip install -e . | ✅ |\n| pkg_resources | python2.7 | python setup.py develop | python setup.py install | ❌ |\n| pkg_resources | python2.7 | python setup.py develop | python setup.py develop | ✅ |\n| pkg_resources | python3.7 | pip install . | pip install . | ✅ |\n| pkg_resources | python3.7 | pip install . | pip install -e . | ✅ |\n| pkg_resources | python3.7 | pip install . | python setup.py install | ❌ |\n| pkg_resources | python3.7 | pip install . | python setup.py develop | ✅ |\n| pkg_resources | python3.7 | pip install -e . | pip install . | ✅ |\n| pkg_resources | python3.7 | pip install -e . | pip install -e . | ✅ |\n| pkg_resources | python3.7 | pip install -e . | python setup.py install | ❌ |\n| pkg_resources | python3.7 | pip install -e . | python setup.py develop | ✅ |\n| pkg_resources | python3.7 | python setup.py install | pip install . | ❌ |\n| pkg_resources | python3.7 | python setup.py install | pip install -e . | ❌ |\n| pkg_resources | python3.7 | python setup.py install | python setup.py install | ✅ |\n| pkg_resources | python3.7 | python setup.py install | python setup.py develop | ❌ |\n| pkg_resources | python3.7 | python setup.py develop | pip install . | ✅ |\n| pkg_resources | python3.7 | python setup.py develop | pip install -e . | ✅ |\n| pkg_resources | python3.7 | python setup.py develop | python setup.py install | ❌ |\n| pkg_resources | python3.7 | python setup.py develop | python setup.py develop | ✅ |\n| pep420 | python2.7 | pip install . | pip install . | ❌ |\n| pep420 | python2.7 | pip install . | pip install -e . | ❌ |\n| pep420 | python2.7 | pip install . | python setup.py install | ❌ |\n| pep420 | python2.7 | pip install . | python setup.py develop | ❌ |\n| pep420 | python2.7 | pip install -e . | pip install . | ❌ |\n| pep420 | python2.7 | pip install -e . | pip install -e . | ❌ |\n| pep420 | python2.7 | pip install -e . | python setup.py install | ❌ |\n| pep420 | python2.7 | pip install -e . | python setup.py develop | ❌ |\n| pep420 | python2.7 | python setup.py install | pip install . | ❌ |\n| pep420 | python2.7 | python setup.py install | pip install -e . | ❌ |\n| pep420 | python2.7 | python setup.py install | python setup.py install | ❌ |\n| pep420 | python2.7 | python setup.py install | python setup.py develop | ❌ |\n| pep420 | python2.7 | python setup.py develop | pip install . | ❌ |\n| pep420 | python2.7 | python setup.py develop | pip install -e . | ❌ |\n| pep420 | python2.7 | python setup.py develop | python setup.py install | ❌ |\n| pep420 | python2.7 | python setup.py develop | python setup.py develop | ❌ |\n| pep420 | python3.7 | pip install . | pip install . | ✅ |\n| pep420 | python3.7 | pip install . | pip install -e . | ✅ |\n| pep420 | python3.7 | pip install . | python setup.py install | ✅ |\n| pep420 | python3.7 | pip install . | python setup.py develop | ✅ |\n| pep420 | python3.7 | pip install -e . | pip install . | ✅ |\n| pep420 | python3.7 | pip install -e . | pip install -e . | ✅ |\n| pep420 | python3.7 | pip install -e . | python setup.py install | ✅ |\n| pep420 | python3.7 | pip install -e . | python setup.py develop | ✅ |\n| pep420 | python3.7 | python setup.py install | pip install . | ✅ |\n| pep420 | python3.7 | python setup.py install | pip install -e . | ✅ |\n| pep420 | python3.7 | python setup.py install | python setup.py install | ✅ |\n| pep420 | python3.7 | python setup.py install | python setup.py develop | ✅ |\n| pep420 | python3.7 | python setup.py develop | pip install . | ✅ |\n| pep420 | python3.7 | python setup.py develop | pip install -e . | ✅ |\n| pep420 | python3.7 | python setup.py develop | python setup.py install | ✅ |\n| pep420 | python3.7 | python setup.py develop | python setup.py develop | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install . | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install . | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install . | python setup.py develop | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | pip install -e . | python setup.py develop | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | python setup.py install | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py install | python setup.py develop | ✅ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python2.7 | python setup.py develop | python setup.py develop | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install . | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install . | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install . | python setup.py develop | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | pip install -e . | python setup.py develop | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | pip install -e . | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | python setup.py install | ❌ |\n| cross_pkg_resources_pkgutil | python3.7 | python setup.py develop | python setup.py develop | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install . | pip install . | ✅ |\n| cross_pep420_pkgutil | python2.7 | pip install . | pip install -e . | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install . | python setup.py install | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install . | python setup.py develop | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install -e . | pip install . | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install -e . | pip install -e . | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install -e . | python setup.py install | ❌ |\n| cross_pep420_pkgutil | python2.7 | pip install -e . | python setup.py develop | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py install | pip install . | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py install | pip install -e . | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py install | python setup.py install | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py install | python setup.py develop | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py develop | pip install . | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py develop | pip install -e . | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py develop | python setup.py install | ❌ |\n| cross_pep420_pkgutil | python2.7 | python setup.py develop | python setup.py develop | ❌ |\n| cross_pep420_pkgutil | python3.7 | pip install . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install . | python setup.py install | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install . | python setup.py develop | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install -e . | python setup.py install | ✅ |\n| cross_pep420_pkgutil | python3.7 | pip install -e . | python setup.py develop | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py install | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py install | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py install | python setup.py install | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py install | python setup.py develop | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py develop | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py develop | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py develop | python setup.py install | ✅ |\n| cross_pep420_pkgutil | python3.7 | python setup.py develop | python setup.py develop | ✅ |\n"
  },
  {
    "path": "native/pkg_a/example_pkg/a/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'a'\n"
  },
  {
    "path": "native/pkg_a/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "native/pkg_a/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup\n\n\nsetup(\n    name='example_pkg_a',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=['example_pkg.a'],\n    zip_safe=False,\n)\n"
  },
  {
    "path": "native/pkg_b/example_pkg/b/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'b'\n"
  },
  {
    "path": "native/pkg_b/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "native/pkg_b/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup\n\n\nsetup(\n    name='example_pkg_b',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=['example_pkg.b'],\n    zip_safe=False,\n)\n"
  },
  {
    "path": "noxfile.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nimport os\nimport nox\n\nHERE = os.path.abspath(os.path.dirname(__file__))\n\n# -- REQUIRES: nox >= 2023.04.22\n# SEE: https://nox.thea.codes/en/stable/index.html\nUSE_PYTHON_VERSIONS = os.environ.get(\"NOXFILE_PYTHON_VERSIONS\", \"\").split()\nif not USE_PYTHON_VERSIONS:\n    with open(os.path.join(HERE, \".python-versions-used\"), \"r\") as file:\n        USE_PYTHON_VERSIONS = [x.strip() for x in file]\n\n\ninstall_commands = ((\"pip\", \"install\", \".\"), (\"pip\", \"install\", \"-e\", \".\"))\n\n\ndef install_packages(session, package_a, package_b, command_a, command_b):\n    env = {**os.environ, \"PIP_CONSTRAINT\": f\"{HERE}/constraints.txt\"}\n    session.install(\"--upgrade\", \"pip\", env=env)\n    session.chdir(package_a)\n    session.run(\"rm\", \"-rf\", \"dist\", \"build\", \"*.egg-info\")\n    session.run(*command_a, env=env)\n    session.chdir(HERE)\n    session.chdir(package_b)\n    session.run(\"rm\", \"-rf\", \"dist\", \"build\", \"*.egg-info\")\n    session.run(*command_b, env=env)\n    session.chdir(HERE)\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize(\"command_a\", install_commands)\n@nox.parametrize(\"command_b\", install_commands)\ndef session_pkgutil(session, command_a, command_b):\n    install_packages(session, \"pkgutil/pkg_a\", \"pkgutil/pkg_b\", command_a, command_b)\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize(\"command_a\", install_commands)\n@nox.parametrize(\"command_b\", install_commands)\ndef session_pkg_resources(session, command_a, command_b):\n    install_packages(\n        session, \"pkg_resources/pkg_a\", \"pkg_resources/pkg_b\", command_a, command_b\n    )\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize(\"command_a\", install_commands)\n@nox.parametrize(\"command_b\", install_commands)\ndef session_pep420(session, command_a, command_b):\n    install_packages(session, \"native/pkg_a\", \"native/pkg_b\", command_a, command_b)\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize(\"command_a\", install_commands)\n@nox.parametrize(\"command_b\", install_commands)\ndef session_cross_pkg_resources_pkgutil(session, command_a, command_b):\n    install_packages(\n        session, \"pkg_resources/pkg_a\", \"pkgutil/pkg_b\", command_a, command_b\n    )\n    session.run(\"python\", \"-m\", \"pip\", \"list\")\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize(\"command_a\", install_commands)\n@nox.parametrize(\"command_b\", install_commands)\ndef session_cross_pep420_pkgutil(session, command_a, command_b):\n    install_packages(session, \"native/pkg_a\", \"pkgutil/pkg_b\", command_a, command_b)\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize('command_a', install_commands)\n@nox.parametrize('command_b', install_commands)\ndef session_cross_pep420_pkg_resources(session, command_a, command_b):\n    install_packages(\n        session, 'native/pkg_a', 'pkg_resources/pkg_b', command_a, command_b\n    )\n    session.run(\"python\", \"verify_packages.py\")\n\n\n@nox.session(python=USE_PYTHON_VERSIONS)\n@nox.parametrize('command_a', install_commands)\n@nox.parametrize('command_b', install_commands)\ndef session_cross_pkg_resources_pep420(session, command_a, command_b):\n    install_packages(\n        session, 'pkg_resources/pkg_a', 'native/pkg_b', command_a, command_b\n    )\n    session.run(\"python\", \"verify_packages.py\")\n"
  },
  {
    "path": "pkg_resources/pkg_a/example_pkg/__init__.py",
    "content": "__import__('pkg_resources').declare_namespace(__name__)\n"
  },
  {
    "path": "pkg_resources/pkg_a/example_pkg/a/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'a'\n"
  },
  {
    "path": "pkg_resources/pkg_a/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "pkg_resources/pkg_a/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup, find_packages\n\n\nsetup(\n    name='example_pkg_a',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=find_packages(),\n    namespace_packages=['example_pkg'],\n    zip_safe=False,\n)\n"
  },
  {
    "path": "pkg_resources/pkg_b/example_pkg/__init__.py",
    "content": "__import__('pkg_resources').declare_namespace(__name__)\n"
  },
  {
    "path": "pkg_resources/pkg_b/example_pkg/b/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'b'\n"
  },
  {
    "path": "pkg_resources/pkg_b/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "pkg_resources/pkg_b/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup, find_packages\n\n\nsetup(\n    name='example_pkg_b',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=find_packages(),\n    namespace_packages=['example_pkg'],\n    zip_safe=False,\n)\n"
  },
  {
    "path": "pkgutil/README.md",
    "content": "# [pkgutil-style namespace packages](https://packaging.python.org/guides/packaging-namespace-packages/#pkgutil-style-namespace-packages)\n\nThe following examples demonstrates the usage / installation of `pkgutil` style namespace packages. \n\n```\npkgutil/\n├ pkg_a/               # the name of this dir doesn't matter\n│  ├ setup.py\n│  └ example_pkg/      # namespace package name\n│      ├__init__.py    # special pkgutil namespace __init__.py\n│      └ a/            # dir name must match the package name from `setup.py`\n│        └ __init__.py\n│        ├ module1.py\n.\n.\n.\n└ pkg_b/\n```\n\nThe anatomy of a namespace package name is `<namespaceA>.<package_name>`.\nNamespaces can also be nested an take the form `<namespaceA>.<namespace_N>.<package_name>`.\n\nThis subdirectory contains two packages (`\"a\"` & `\"b\"`) that share the namespace `example_pkg`.\nWhen installed these packages will have the names `example_pkg.a` & `example_pkg.b` respectively.\n\n### Detailed Requirements\nThe directories `pkg_a` and `pkg_b` in this subdirectory contain two different python packages. \nThe names of these directories have no effect on the installed package.\n\nEach of these directories should at least contain:\n1.  A configuration file, in this case `setup.py`.\n2.  A directory, whose name determines the namespace name.\n\nIn this example `example_pkg` is the name of the namespace. This directory should contain:\n1. The `__init__.py` file for the namespace package, which must contain only the following:\n    ```python\n    __path__ = __import__('pkgutil').extend_path(__path__, __name__)\n    ```\n    Nested namespaces must contain an identical `__init__.py`.\n\n2. A directory, whose name determines the `package_name`. This directory holds the package's source code.\n    - The directory name, must match the name given in the `setup.py`.\n\n### Practical Usage\nWhen using namespace packages, it is helpful to understand that the delimiter between the \n`namespace` and the `package_name` is not consistent throughout common python workflows.\n\nFor example, here is how to reference the namespace package `\"a\"` from this repository.\n- Creating your namespace package with setuptools in `setup.py`:\n    - `setup(name=\"example_pkg_a\")`\n- Installing / Uninstalling a namespace package with `pip`:\n    - `pip install example-pkg-a`\n- Importing a namespace package with`python`:\n    - `import example_pkg.a`\n\nFrom the root directory, running the following command will install a package called `example_pkg.a`.\n\n```bash\ncd pkgutil/pkg_a\n\npython -m pip install .\n\n# Test the install by printing the `name` from the `__init__.py` file.\npython -c \"import example_pkg.a as a; print(a.name)\"\n```\n"
  },
  {
    "path": "pkgutil/pkg_a/example_pkg/__init__.py",
    "content": "__path__ = __import__('pkgutil').extend_path(__path__, __name__)\n"
  },
  {
    "path": "pkgutil/pkg_a/example_pkg/a/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'a'\n"
  },
  {
    "path": "pkgutil/pkg_a/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "pkgutil/pkg_a/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup, find_packages\n\n\nsetup(\n    name='example_pkg_a',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=find_packages(),\n    zip_safe=False,\n)\n"
  },
  {
    "path": "pkgutil/pkg_b/example_pkg/__init__.py",
    "content": "__path__ = __import__('pkgutil').extend_path(__path__, __name__)\n"
  },
  {
    "path": "pkgutil/pkg_b/example_pkg/b/__init__.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nname = 'b'\n"
  },
  {
    "path": "pkgutil/pkg_b/pyproject.toml",
    "content": "[build-system]\nrequires = [\"setuptools\"]\nbuild-backend = \"setuptools.build_meta\"\n"
  },
  {
    "path": "pkgutil/pkg_b/setup.py",
    "content": "# Copyright 2017 Google Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom setuptools import setup, find_packages\n\n\nsetup(\n    name='example_pkg_b',\n\n    version='1',\n\n    description='',\n    long_description='',\n\n    author='Jon Wayne Parrott',\n    author_email='jonwayne@google.com',\n\n    license='Apache Software License',\n\n    packages=find_packages(),\n    zip_safe=False,\n)\n"
  },
  {
    "path": "report_to_table.py",
    "content": "#!/usr/bin/python\n# -*- coding: utf-8 -*-\n\nimport io\nimport json\n\n\nwith io.open('report.json', 'r') as f:\n    data = json.load(f)\n\nwith io.open('table.md', 'w') as f:\n    f.write('| Type | Interpreter | Package A command | Package B command | Status |\\n')\n    f.write('| --- | --- | --- | --- | --- |\\n')\n    for session in data['sessions']:\n        session_name = session['name']\n        session_detailled_name = session['signatures'][-1]\n        session_interpreter = session_detailled_name.replace(session_name + \"-\", \"python\")\n        # TODO: Replace with `str.removeprefix()` in Python 3.12\n        session_name = session_name[len(\"session_\") :]\n\n        f.write('| {} | {} | {} | {} | {} |\\n'.format(\n            session_name,\n            session_interpreter,\n            ' '.join(session['args']['command_a']),\n            ' '.join(session['args']['command_b']),\n            '✅' if session['result_code'] else '❌'\n        ))\n"
  },
  {
    "path": "requirements.txt",
    "content": "# -- PYTHON PACKAGE REQUIREMENTS:\n# USE: pip install -r <THIS_FILE>\n\nnox >= 2023.04.22\n"
  },
  {
    "path": "table.md",
    "content": "| Type | Interpreter | Package A command | Package B command | Status |\n| --- | --- | --- | --- | --- |\n| pkgutil | python3.8 | pip install . | pip install . | ✅ |\n| pkgutil | python3.8 | pip install . | pip install -e . | ✅ |\n| pkgutil | python3.8 | pip install -e . | pip install . | ✅ |\n| pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |\n| pkgutil | python3.10 | pip install . | pip install . | ✅ |\n| pkgutil | python3.10 | pip install . | pip install -e . | ✅ |\n| pkgutil | python3.10 | pip install -e . | pip install . | ✅ |\n| pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |\n| pkgutil | python3.12 | pip install . | pip install . | ✅ |\n| pkgutil | python3.12 | pip install . | pip install -e . | ✅ |\n| pkgutil | python3.12 | pip install -e . | pip install . | ✅ |\n| pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |\n| pkg_resources | python3.8 | pip install . | pip install . | ✅ |\n| pkg_resources | python3.8 | pip install . | pip install -e . | ✅ |\n| pkg_resources | python3.8 | pip install -e . | pip install . | ✅ |\n| pkg_resources | python3.8 | pip install -e . | pip install -e . | ✅ |\n| pkg_resources | python3.10 | pip install . | pip install . | ✅ |\n| pkg_resources | python3.10 | pip install . | pip install -e . | ✅ |\n| pkg_resources | python3.10 | pip install -e . | pip install . | ✅ |\n| pkg_resources | python3.10 | pip install -e . | pip install -e . | ✅ |\n| pkg_resources | python3.12 | pip install . | pip install . | ✅ |\n| pkg_resources | python3.12 | pip install . | pip install -e . | ✅ |\n| pkg_resources | python3.12 | pip install -e . | pip install . | ✅ |\n| pkg_resources | python3.12 | pip install -e . | pip install -e . | ✅ |\n| pep420 | python3.8 | pip install . | pip install . | ✅ |\n| pep420 | python3.8 | pip install . | pip install -e . | ✅ |\n| pep420 | python3.8 | pip install -e . | pip install . | ✅ |\n| pep420 | python3.8 | pip install -e . | pip install -e . | ✅ |\n| pep420 | python3.10 | pip install . | pip install . | ✅ |\n| pep420 | python3.10 | pip install . | pip install -e . | ✅ |\n| pep420 | python3.10 | pip install -e . | pip install . | ✅ |\n| pep420 | python3.10 | pip install -e . | pip install -e . | ✅ |\n| pep420 | python3.12 | pip install . | pip install . | ✅ |\n| pep420 | python3.12 | pip install . | pip install -e . | ✅ |\n| pep420 | python3.12 | pip install -e . | pip install . | ✅ |\n| pep420 | python3.12 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.8 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python3.8 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.8 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.10 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python3.10 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.10 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.12 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pkgutil | python3.12 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pkgutil | python3.12 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.8 | pip install . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.8 | pip install . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.8 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.8 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.10 | pip install . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.10 | pip install . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.10 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.10 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.12 | pip install . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.12 | pip install . | pip install -e . | ✅ |\n| cross_pep420_pkgutil | python3.12 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkgutil | python3.12 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkg_resources | python3.8 | pip install . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.8 | pip install . | pip install -e . | ❌ |\n| cross_pep420_pkg_resources | python3.8 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.8 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkg_resources | python3.10 | pip install . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.10 | pip install . | pip install -e . | ❌ |\n| cross_pep420_pkg_resources | python3.10 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.10 | pip install -e . | pip install -e . | ✅ |\n| cross_pep420_pkg_resources | python3.12 | pip install . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.12 | pip install . | pip install -e . | ❌ |\n| cross_pep420_pkg_resources | python3.12 | pip install -e . | pip install . | ✅ |\n| cross_pep420_pkg_resources | python3.12 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.8 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pep420 | python3.8 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.8 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pep420 | python3.8 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.10 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pep420 | python3.10 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.10 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pep420 | python3.10 | pip install -e . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.12 | pip install . | pip install . | ✅ |\n| cross_pkg_resources_pep420 | python3.12 | pip install . | pip install -e . | ✅ |\n| cross_pkg_resources_pep420 | python3.12 | pip install -e . | pip install . | ❌ |\n| cross_pkg_resources_pep420 | python3.12 | pip install -e . | pip install -e . | ✅ |\n"
  },
  {
    "path": "verify_packages.py",
    "content": "from example_pkg import a\nfrom example_pkg import b\n\nprint(a.name)\nprint(a.__path__)\nprint(b.name)\nprint(b.__path__)\n"
  }
]