Pyodide doesn't handle specifiers in pip installs (such as we expand in dependency-groups)

[henryiii]

Description

In setting up boost-histogram, I added this:

[dependency-groups]
test = [
    "hypothesis>=6.0; sys_platform != 'ios'", # slow on iOS, can fail health check
    "pytest-xdist; sys_platform != 'ios'",  # No processes on iOS
]

this breaks the custom handling in pyodide:

  subprocess.CalledProcessError: Command '['/tmp/cibw-run-rbgbzz8d/cp312-pyodide_wasm32/venv-test/bin/pip', 'install', 'cloudpickle', 'hypothesis>=6.0; sys_platform != "ios"', 'pytest-benchmark', 'pytest>=6.0', 'pytest-xdist; sys_platform != "ios"', 'numpy']' returned non-zero exit status 1.

These should be processed by packaging in pyodide's pip, I think. CC @hoodmane and @agriyakhetarpal.

Build log

https://github.com/scikit-hep/boost-histogram/actions/runs/15434153116/job/43437235111?pr=1018

CI config

scikit-hep/boost-histogram@ffc7dea

(now in scikit-hep/boost-histogram#1016)

[hoodmane]

I think this may be a recent regression caused as part of the fix for the UV double virtual environment bug. I think I fixed it on the main branch of pyodide-build because it broke in the Pyodide test suite. I'll double check and if so I can make a release of pyodide-build and hopefully that'll fix it.

[hoodmane]

Okay I confirmed that I can reproduce this on pyodide-build 0.30.4 but not on the tip of tree. So I'll release pyodide-build 0.30.5 and that should fix it.

[henryiii]

Still seems to be broken:

scikit-hep/boost-histogram#1020 (edit: I'm going to manually work around it in that PR, failing log at https://github.com/scikit-hep/boost-histogram/actions/runs/15483452068/job/43593373177?pr=1020)

  + pip install cloudpickle 'hypothesis>=6.0; sys_platform != "ios"' pytest-benchmark 'pytest>=6.0' 'pytest-xdist; sys_platform != "ios"' numpy
  ERROR: Invalid requirement: '!=': Expected package name at the start of dependency specifier

[henryiii]

We might be able to side step this by using --group.