Not all transitive dependencies are installed

[samuelcolvin]

micropip doesn't install some required transitive dependencies. (related to #201)

This is my current workaround for adding extra required transitive dependencies, maybe it's helpful in working out what's wrong?

def _add_extra_dependencies(dependencies: list[str]) -> list[str]:
    """Add extra dependencies we know some packages need.

    Workaround for micropip not installing some required transitive dependencies.

    pygments seems to be required to get rich to work properly, ssl is required for FastAPI and HTTPX.
    See also https://github.com/pyodide/micropip/issues/201#issuecomment-2645794486.
    """
    extras = []
    for d in dependencies:
        if d.startswith(('logfire', 'rich')):
            extras.append('pygments')
        elif d.startswith(('fastapi', 'httpx', 'pydantic_ai')):
            extras.append('ssl')

        if d.startswith('pydantic_ai'):
            extras.append('typing_extensions>=4.12')

        if len(extras) == 3:
            break

    return dependencies + extras

See pydantic/pydantic.run#44.

[ryanking13]

        if d.startswith(('logfire', 'rich')):
            extras.append('pygments')

Yes, I think we need to add pygments and markdown-it-py to a dependency in rich recipe.

elif d.startswith(('fastapi', 'httpx', 'pydantic_ai')):
    extras.append('ssl')

ssl is a Python stdlib, but it is unvendored (optional) in Pyodide, because it is very big because of the openssl. I think we can add a recipe for those packages and specify ssl as a requirement explicitly.

if d.startswith('pydantic_ai'):
    extras.append('typing_extensions>=4.12')

I think you need to update the typing_extensions version in Pyodide.

[hoodmane]

But why does httpx need ssl with Pyodide? I'm pretty sure @joemarshall didn't intend it to be required so we should try to fix it there.