Make build more portable and compatible with manylinux2014

Additionally:
* Specify some build requirement version
* Move metadata outta setup script
* Add linting tests to tox

CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 2.6.0)
+project(palace)
+find_package(Alure2 REQUIRED CONFIG)
+
+get_target_property(include_dirs Alure2::alure2 INTERFACE_INCLUDE_DIRECTORIES)
+message("alure2_include_dirs=${include_dirs}")
+
+get_target_property(link_libraries Alure2::alure2 INTERFACE_LINK_LIBRARIES)
+get_target_property(libalure2 Alure2::alure2 IMPORTED_LOCATION_NOCONFIG)
+message("alure2_extra_objects=${link_libraries};${libalure2}")

MANIFEST.in

@@ -1 +1,2 @@
-include LICENSE pyproject.toml alure.pxd palace.pyx
+include alure.pxd palace.pyx CMakeLists.txt
+graft examples

README.md

@@ -1,5 +1,5 @@
 # palace
-Palace is a Python 3D audio API wrapping around [alure][0].
+Palace is a Python 3D audio API wrapping around [alure].
 To quote alure's README,
 
 > It uses OpenAL for audio rendering, and provides common higher-level features
@@ -7,7 +7,7 @@ To quote alure's README,
 > and source management for virtually unlimited sound source handles.
 
 ## Features
-In some sense, what palace aimes to be to OpenAL is what [ModernGL][1]
+In some sense, what palace aimes to be to OpenAL is what [ModernGL]
 is to OpenGL (except that all the heavy-lifting are taken are by alure):
 
 * 3D sound rendering
@@ -19,30 +19,39 @@ is to OpenGL (except that all the heavy-lifting are taken are by alure):
   type annotation
 
 ## Installation
+### Prerequisites
+Palace runtime only depends on [alure] and Python 3.6+.
+`pip` is required for installation.
+
 ### Via PyPI
-Palace requires Python 3.6+ and [alure][0].
-Given these dependencies satisfied, palace could be installed using `pip` via
-
-    pip install palace
-
-Currently only GNU/Linux is supported.  If you want to help package for
-other operating systems, please head to issue #1.
+Wheel distribution is not yet ready at the time of writing.  If you want to
+help out, please head to our GitHub issues [#1][GH-1] and [#3][GH-3].
 
 ### From source
-To build from source, one will also need to have Python headers, [Cython][2],
-and a C++11 compiler (and probably `git` for fetching the source) installed.
-Palace can then be compiled and installed by running
-
+Aside from the build dependencies listed in `pyproject.toml`, one will
+additionally need compatible Python headers and a C++11 compiler (and probably
+`git` for fetching the source).  Palace can then be compiled and installed
+by running
 ```sh
 git clone https://github.com/McSinyx/palace
-cd palace
-python setup.py install --user
+pip install palace/
 ```
 
 ## Usage
 One may start with the `examples` for sample usage of palace.
 For further information, Python's `help` is your friend.
 
-[0]: https://github.com/kcat/alure
-[1]: https://github.com/moderngl/moderngl
-[2]: https://cython.org/
+## License and Credits
+Palace is released under the [GNU LGPL version 3 or later][LGPLv3+].
+
+The [`cmake` modules are provided by scikit-build][sk-cmake], which is
+originally released under the [MIT and 2-clause BSD][sk-license] licence.
+
+[alure]: https://github.com/kcat/alure
+[ModernGL]: https://github.com/moderngl/moderngl
+[Cython]: https://cython.org/
+[GH-1]: https://github.com/McSinyx/palace/issues/1
+[GH-3]: https://github.com/McSinyx/palace/issues/3
+[LGPLv3+]: https://www.gnu.org/licenses/lgpl-3.0.en.html
+[sk-cmake]: https://scikit-build.readthedocs.io/en/latest/cmake-modules.html
+[sk-license]: https://github.com/scikit-build/scikit-build/blob/master/LICENSE

pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-# Minimum requirements for the build system to execute.
-requires = ['setuptools', 'wheel', 'cython']
+requires = ['setuptools>=43', 'wheel>=0.31', 'Cython']
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -0,0 +1,30 @@
+[metadata]
+name = palace
+version = 0.0.3
+url = https://github.com/McSinyx/palace
+author = Nguyễn Gia Phong
+author_email = vn.mcsinyx@gmail.com
+classifiers =
+    Development Status :: 2 - Pre-Alpha
+    Intended Audience :: Developers
+    License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)
+    Operating System :: POSIX :: Linux
+    Programming Language :: C++
+    Programming Language :: Cython
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3 :: Only
+    Topic :: Multimedia :: Sound/Audio
+    Topic :: Software Development :: Libraries
+    Typing :: Typed
+license = LGPLv3+
+license_file = LICENSE
+description = Pythonic Audio Library and Codecs Environment
+long_description = file: README.md
+long_description_content_type = text/markdown
+keywords = openal, alure, hrtf
+
+[options]
+zip_safe = False
+python_requires = >=3.6

setup.py

@@ -1,40 +1,38 @@
 #!/usr/bin/env python3
+import re
+from distutils.dir_util import mkpath
+from distutils.file_util import copy_file
+from operator import methodcaller
+from os.path import dirname, join
+from subprocess import DEVNULL, PIPE, run
+
 from Cython.Build import cythonize
 from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
 
-with open('README.md') as f:
-    long_description = f.read()
 
-setup(
-    name='palace',
-    version='0.0.3',
-    description='Pythonic Audio Library and Codecs Environment',
-    long_description=long_description,
-    long_description_content_type='text/markdown',
-    url='https://github.com/McSinyx/palace',
-    author='Nguyễn Gia Phong',
-    author_email='vn.mcsinyx@gmail.com',
-    license='LGPLv3+',
-    classifiers=[
-        'Development Status :: 2 - Pre-Alpha',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)',
-        'Operating System :: POSIX :: Linux',
-        'Programming Language :: C++',
-        'Programming Language :: Cython',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3 :: Only',
-        'Topic :: Multimedia :: Sound/Audio',
-        'Topic :: Software Development :: Libraries',
-        'Typing :: Typed'],
-    keywords='openal alure hrtf',
-    ext_modules=cythonize(
-        Extension('palace', ['palace.pyx'],
-                  include_dirs=['/usr/include/AL/'],
-                  libraries=['alure2'], language='c++'),
-        compiler_directives=dict(
-            binding=False, embedsignature=True, language_level='3str',
-            c_string_type='str', c_string_encoding='utf8')),
-    zip_safe=False)
+class BuildAlure2Ext(build_ext):
+    """Builder of extensions linked to alure2."""
+    def finalize_options(self) -> None:
+        """Add alure2's and its dependencies' include directories
+        and objects to Extension attributes.
+        """
+        super().finalize_options()
+        mkpath(self.build_temp)
+        copy_file(join(dirname(__file__), 'CMakeLists.txt'),
+                  self.build_temp)
+        cmake = run(['cmake', '.'], check=True, stdout=DEVNULL, stderr=PIPE,
+                    cwd=self.build_temp, universal_newlines=True)
+        for key, value in map(methodcaller('groups'),
+                              re.finditer(r'^alure2_(\w*)=(.*)$',
+                                          cmake.stderr, re.MULTILINE)):
+            for ext in self.extensions:
+                getattr(ext, key).extend(value.split(';'))
+
+
+setup(cmdclass={'build_ext': BuildAlure2Ext},
+      ext_modules=cythonize(
+          Extension(name='palace', sources=['palace.pyx'], language='c++'),
+          compiler_directives=dict(
+              binding=False, embedsignature=True, language_level='3str',
+              c_string_type='str', c_string_encoding='utf8')))

tox.ini

@@ -1,4 +1,11 @@
-[flake8]
-ignore = E225, E226, E227, E701
-filename = *.py, *.pyx
-exclude = setup.py
+[tox]
+minversion = 3.3
+isolated_build = true
+
+[testenv]
+deps = flake8
+commands =
+; Lint Python and Cython source files
+    flake8 --ignore=E225,E226,E227,E701
+    flake8 --ignore=E225,E226,E227,E701,E999 palace.pyx
+    flake8 --ignore=E225,E226,E227,E501,E701,E999 alure.pxd