Trying to add Pyodide to CI

[hoodmane]

I applied this patch to pyproject.toml:

 [tool.scikit-build]
 minimum-version = "build-system.requires"
-wheel.platlib = false
-cmake.define.NB_TEST = false
+wheel.platlib = true
+cmake.define.NB_TEST = true
+cmake.define.NB_TEST_STABLE_ABI = true
+cmake.define.NB_TEST_SHARED_BUILD = true

and now I'm trying to run cibuildwheel --only=cp312-pyodide_wasm32. I needed to apply #693. After that it fails here:

[22/94] Generating py_stub_test.pyi
FAILED: tests/py_stub_test.pyi /tmp/tmpqa002vg1/build/tests/py_stub_test.pyi 
cd /tmp/tmpqa002vg1/build/tests && /tmp/build-env-lpoyzm2l/bin/python /home/rchatham/Documents/programming/nanobind/src/stubgen.py -q -i /tmp/tmpqa002vg1/build/tests -m py_stub_test -o py_stub_test.pyi
Traceback (most recent call last):
  <...>
  File "/home/rchatham/Documents/programming/nanobind/src/stubgen.py", line 1346, in main
    mod_imported = importlib.import_module(mod)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  <...>
ModuleNotFoundError: No module named 'py_stub_test'

It seems that the build/tests directory only contains the following four files: cmake_install.cmake, test_typing.py, CMakeFiles, libinter_module.s'.
I hit the same error when I do cibuildwheel --only cp312-manylinux_x86_64.

@henryiii any idea what I should do here? Also, is it possible to make a pyproject.toml file in the test directory that instructs scikit-build to build from the parent directory? Or to have a second [tool.scikit-build.test] set of options for scikit-build?

[henryiii]

Yes. For the main directory approach, instead of patching it, you can use [[tool.scikit-build.overrides]].

[tool.scikit-build]
minimum-version = "build-system.requires"
wheel.platlib = false
cmake.define.NB_TEST = false

[[tool.scikit-build.overrides]]
if.env.BUILD_TESTING = true
wheel.platlib = true
cmake.define.NB_TEST = true
cmake.define.NB_TEST_STABLE_ABI = true
cmake.define.NB_TEST_SHARED_BUILD = true

Then you can set BUILD_TESTING=1 when building to make the tests.

#697 has an example of the test directory approach.