From 512ddc09897c9f8cb5b3a2bdc2e7fe4be4bccd2b Mon Sep 17 00:00:00 2001
From: Benjamin Gilbert <bgilbert@cs.cmu.edu>
Date: Wed, 30 Oct 2024 10:44:46 -0700
Subject: [PATCH] Fix `setup.py install` with old setuptools

We still need to support building distro packages with older setuptools
that doesn't understand PEP 621.  Re-add enough setup.py configuration
(duplicating pyproject.toml) to make older setuptools happy.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>
---
 .github/workflows/python.yml | 19 +++++++++++++++++++
 setup.py                     | 20 ++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 3adaf2eb..01274db6 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -231,6 +231,25 @@ jobs:
         path: artifacts/whl
         compression-level: 0
 
+  setuptools:
+    name: Setuptools install
+    needs: pre-commit
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v4
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libopenslide0 python3-pil
+        pip install pytest
+    - name: Install OpenSlide Python
+      run: sudo python setup.py install
+    - name: Run tests
+      run: pytest -v
+    - name: Tile slide
+      run: python examples/deepzoom/deepzoom_tile.py --viewer -o tiled tests/fixtures/small.svs
+
   docs:
     name: Docs
     needs: pre-commit
diff --git a/setup.py b/setup.py
index a4702e72..82116233 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,13 @@
+import os
 import sys
 
 from setuptools import Extension, setup
 
+# Load version string
+_verfile = os.path.join(os.path.dirname(__file__), 'openslide', '_version.py')
+with open(_verfile) as _fh:
+    exec(_fh.read())  # instantiates __version__
+
 # use the Limited API on Python 3.11+; build release-specific wheels on
 # older Python
 _abi3 = sys.version_info >= (3, 11)
@@ -21,4 +27,18 @@
         # tag wheel for Limited API
         'bdist_wheel': {'py_limited_api': 'cp311'} if _abi3 else {},
     },
+    #
+    # setuptools < 61 compatibility for distro packages building from source
+    name='openslide-python',
+    version=__version__,  # type: ignore[name-defined]  # noqa: F821
+    install_requires=[
+        'Pillow',
+    ],
+    packages=[
+        'openslide',
+    ],
+    package_data={
+        'openslide': ['py.typed', '*.pyi'],
+    },
+    zip_safe=False,
 )