python - 使用 distutils，其中 swig 接口(interface)文件位于 src 文件夹中

Question

我有一个看起来像这样的 setup.py:

from setuptools import setup, Extension
import glob

sources = glob.glob('src/*.cpp') + glob.glob('src/*.i')
# this is ugly, but otherwise I get the wrapper included twice
sources = [source for source in sources if '_wrap' not in source]
setup(
    name = 'engine',
    ext_modules = [
        Extension(
            '_engine',
            sources = sources,
            swig_opts = ['-c++'],
            include_dirs = ['src']
        )
    ],
    py_modules = ['engine']
    package_dir = {'' : 'src'}
)

现在只要我运行 install 两次就可以了。第一次，swig 在 src 目录中创建 engine.py。但它不会被复制到目标。我第二次运行 setup.py 文件时，找到并安装了 engine.py。有没有一种方法可以一次性完成所有工作？

Answer 1

我同意这应该开箱即用，并且会认为这是一个错误。

实现此功能的一个方法是简单地更改构建内容的顺序。默认情况下，setup.py 将首先收集 python 模块，然后构建任何外部包。

您可以通过子类化默认的 build 类来更改构建顺序，然后让 setup.py 使用您的自定义 build通过 cmdclass 选项进行分类。

from setuptools import setup, Extension
from distutils.command.build import build as _build

#Define custom build order, so that the python interface module
#created by SWIG is staged in build_py.
class build(_build):
    # different order: build_ext *before* build_py
    sub_commands = [('build_ext',     _build.has_ext_modules),
                    ('build_py',      _build.has_pure_modules),
                    ('build_clib',    _build.has_c_libraries),
                    ('build_scripts', _build.has_scripts),
                   ]

 setup(
    name = 'engine',
    cmdclass = {'build': build },  #Use your own build class
    ext_modules = [Extension('_engine',
                             sources = sources,
                             swig_opts = ['-c++'],
                             include_dirs = ['src']
                   )],
    ...