maturin develop doesn't seem to work under PyPy

[oconnor663]

First here's the repository I'm using:

[jacko@athena3 tmp]$ git clone https://github.com/oconnor663/blake3-py
...
[jacko@athena3 tmp]$ cd blake3-py/
[jacko@athena3 blake3-py]$ git log -1 --oneline
a5e4dce version 0.2.0

Now if I try to use maturin develop under CPython, it works fine:

[jacko@athena3 blake3-py]$ venv_dir=`mktemp -d`&& virtualenv $venv_dir -p python3.9 && source $venv_dir/bin/activate
created virtual environment CPython3.9.6.final.0-64 in 116ms
  creator CPython3Posix(dest=/tmp/tmp.rh26Sx3k7A, clear=False, no_vcs_ignore=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/jacko/.local/share/virtualenv)
    added seed packages: pip==21.1.3, setuptools==57.1.0, wheel==0.36.2
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
(tmp.rh26Sx3k7A) [jacko@athena3 blake3-py]$ python --version
Python 3.9.6                      
(tmp.rh26Sx3k7A) [jacko@athena3 blake3-py]$ pip --version                                                                                                                                      
pip 21.1.3 from /tmp/tmp.rh26Sx3k7A/lib/python3.9/site-packages/pip (python 3.9)
(tmp.rh26Sx3k7A) [jacko@athena3 blake3-py]$ maturin develop
...
(tmp.rh26Sx3k7A) [jacko@athena3 blake3-py]$ python
Python 3.9.6 (default, Jun 30 2021, 10:22:16) 
[GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import blake3
>>> blake3.__version__
'0.2.0'

But if I try the same with PyPy, it doesn't seem to work:

[jacko@athena3 blake3-py]$ venv_dir=`mktemp -d`&& virtualenv $venv_dir -p pypy3 && source $venv_dir/bin/activate                                                                          
created virtual environment PyPy3.7.10.final.0-64 in 119ms
  creator PyPy3Posix(dest=/tmp/tmp.ocogyLRCaf, clear=False, no_vcs_ignore=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/jacko/.local/share/virtualenv)
    added seed packages: pip==21.1.3, setuptools==57.1.0, wheel==0.36.2
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
(tmp.ocogyLRCaf) [jacko@athena3 blake3-py]$ python --version
Python 3.7.10 (77787b8f4c49115346d1e9cbaf48734137417738, Jun 13 2021, 02:02:23)
[PyPy 7.3.5 with GCC 11.1.0]   
(tmp.ocogyLRCaf) [jacko@athena3 blake3-py]$ pip --version
pip 21.1.3 from /tmp/tmp.ocogyLRCaf/site-packages/pip (python 3.7)
(tmp.ocogyLRCaf) [jacko@athena3 blake3-py]$ maturin develop
...
(tmp.ocogyLRCaf) [jacko@athena3 blake3-py]$ python
Python 3.7.10 (77787b8f4c49115346d1e9cbaf48734137417738, Jun 13 2021, 02:02:23)
[PyPy 7.3.5 with GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>> import blake3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'blake3'

Have I missed anything important here? The output of maturin develop itself just seems to be regular Cargo build output, and I don't think there are any relevant warnings or errors, but I can include it if that's helpful. This is on Arch Linux on x86_64.

[messense]

I've reproduced it with the pyo3-pure test crate.

maturin develop puts it in <PREFIX>/lib/python3.7/site-packages but that path is not in sys.path on PyPy 3.7 for whatever reasons.

>>>> import sys
>>>> sys.path
['/Users/messense/Projects/maturin/test-crates/pyo3-pure', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib_pypy/__extensions__', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib_pypy', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib-python/3', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib-python/3/lib-tk', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib-python/3/plat-darwin', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib-python/3/plat-mac', '/Users/messense/.pyenv/versions/pypy3.7-7.3.5/lib-python/3/plat-mac/lib-scriptpackages', '/Users/messense/.pyenv/versions/pypy3.7/site-packages']

If you append <PREFIX>/lib/python3.7/site-packages to sys.path it works fine.