Dockerfile for pyodide build

Useful on macOS, where it's currently broken.

Build with:

docker build . -t pyodide-build

Run with:

docker run -v $PWD:/pkg -w /pkg --rm -it pyodide-build

To activate environment with pyodide build:

. /venv-host/bin/activate

Then you can build with:

pyodide build

To run tests.

deactivate
. /venv-pyodide/bin/activate
pytest

Guides

Getting into the build environment:

So what you want to do is: Set symlink_dir_str to a constant absolute path instead of the temp directory here then the compilers in that directory will work the same as in the build so you should be able to reproduce the linker error. You should also add that directory at the beginning of your path. You probably also want to keep the virtual environment around. [by uncommenting this line])https://github.com/pyodide/pyodide/blob/main/pyodide-build/pyodide_build/pypabuild.py#L99). If you source the activate script from the build virtual environment and add the compiler symlinks directory to the beginning of your path it should be possible to reproduce a lot of the build.