Build wheels for pyobjus (#84)

* Build wheels.

* No need to check for cython.

* Use setuptools.

* Cython needs to be available.

* Cython needs to be installed for sdist and tests.

* Missing pytest.

.github/workflows/deploy.yml

@@ -1,10 +1,17 @@
-name: Deploy sdist
+name: Deploy sdist/wheels
 
 on: [push, pull_request]
 
+
 jobs:
   deploy:
-    runs-on: macOs-latest
+    runs-on: macos-latest
+    env:
+      CIBW_BUILD_VERBOSITY: 3
+      CIBW_BUILD: cp3{6,7,8,9,10}-*
+      CIBW_ARCHS: "x86_64 universal2 arm64"
+      CIBW_TEST_COMMAND: python -c "from pyobjus import autoclass, objc_str"
+      CIBW_TEST_SKIP: "*arm64*"
     steps:
     - uses: actions/checkout@v2
 
@@ -14,18 +21,20 @@ jobs:
         python-version: '3.x'
 
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip setuptools
-        pip install cython twine
+      run: python -m pip install --upgrade twine cibuildwheel cython
 
-    - name: Build Package
+    - name: Build sdist
       run: |
         python setup.py sdist --formats=gztar
 
+    - name: Build wheels
+      run: |
+        python -m cibuildwheel --output-dir dist
+
     - name: Create artifacts
       uses: actions/upload-artifact@v1
       with:
-        name: sdist
+        name: wheels
         path: dist
 
     - name: Upload to GitHub Releases
@@ -48,7 +57,6 @@ jobs:
     - name: Test sdist
       run: |
         pip uninstall cython -y
-
         root="$(pwd)"
         cd ~
         pyobjus_fname=$(ls $root/dist/pyobjus-*.tar.gz)

.github/workflows/python-package.yml

@@ -1,6 +1,3 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
 name: Python package
 
 on: [push, pull_request]
@@ -11,20 +8,20 @@ jobs:
     runs-on: macOs-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
+
+    - name: Install project
       run: |
-        python -m pip install --upgrade pip
-        pip install --timeout=120 --user -U setuptools cython pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        pip install --timeout=120 --user .
+        pip install cython pytest
+        pip install .
+
     - name: Test with pytest
       run: |
         make test_lib

setup.py

@@ -1,9 +1,9 @@
-from distutils.core import setup, Extension
+from setuptools import setup, Extension
 from os import environ, walk
 from os.path import dirname, join, exists
 import sys
-import subprocess
 import platform
+from distutils.command.build_ext import build_ext
 
 with open(join('pyobjus', '__init__.py')) as fd:
     VERSION = [
@@ -20,20 +20,37 @@
 print("Pyobjus platform is {}".format(dev_platform))
 
 # OSX
+files = []
 if dev_platform == 'darwin':
-    try:
-        from Cython.Distutils import build_ext
-    except ImportError:
-        raise
     files = ['pyobjus.pyx']
 # iOS
 elif dev_platform == 'ios':
-    from distutils.command.build_ext import build_ext
     files = ['pyobjus.c']
 
 
 class PyObjusBuildExt(build_ext, object):
 
+    def __new__(cls, *a, **kw):
+        # Note how this class is declared as a subclass of distutils
+        # build_ext as the Cython version may not be available in the
+        # environment it is initially started in. However, if Cython
+        # can be used, setuptools will bring Cython into the environment
+        # thus its version of build_ext will become available.
+        # The reason why this is done as a __new__ rather than through a
+        # factory function is because there are distutils functions that check
+        # the values provided by cmdclass with issublcass, and so it would
+        # result in an exception.
+        # The following essentially supply a dynamically generated subclass
+        # that mix in the cython version of build_ext so that the
+        # functionality provided will also be executed.
+        if dev_platform != 'ios':
+            from Cython.Distutils import build_ext as cython_build_ext
+            build_ext_cls = type(
+                'PyObjusBuildExt', (PyObjusBuildExt, cython_build_ext), {})
+            return super(PyObjusBuildExt, cls).__new__(build_ext_cls)
+        else:
+            return super(PyObjusBuildExt, cls).__new__(cls)
+
     def build_extensions(self):
         # create a configuration file for pyobjus (export the platform)
         config_pxi_fn = join(dirname(__file__), 'pyobjus', 'config.pxi')
@@ -69,6 +86,7 @@ def build_extensions(self):
     'ttf', 'obj', 'mtl', 'kv', 'mpg', 'glsl', 'zip', 'h', 'm', 'md',
 )
 
+
 def tree(source, allowed_ext=data_allowed_ext, tree_name='share/pyobjus-'):
     found = {}