Failed to build on MacOS Monterey

[Jash-Shah]

The current dev version on pyGnuastro uploaded on TestPyPI failed to install on a MacOS Monterey system with Python 3.9.13.

The commands used to install the dev version of the package were(a virtual env is created to test a clean install):

python3 -m venv pygnuastro
source pygnuastro/bin/activate
# extra-index-url has to be supplied to avoid pip installing the dependencies from TestPyPI instead of PyPI
pip install -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/  pygnuastro

The error message received was due to pip defaulting to source dist(.tar.gz) instead of the macOS wheels. The error received was similar to:

Processing ./pygnuastro-0.0.1.dev2.tar.gz
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [15 lines of output]
      Traceback (most recent call last):
        File "/home/jash-ubuntu/Desktop/Coding_Trash/GSoC/GNUAstro/pygnuastro/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>
          main()
        File "/home/jash-ubuntu/Desktop/Coding_Trash/GSoC/GNUAstro/pygnuastro/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/jash-ubuntu/Desktop/Coding_Trash/GSoC/GNUAstro/pygnuastro/lib/python3.8/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 130, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-568d5uv6/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 338, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "/tmp/pip-build-env-568d5uv6/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 320, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-568d5uv6/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 335, in run_setup
          exec(code, locals())
        File "<string>", line 3, in <module>
      ModuleNotFoundError: No module named 'numpy'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

[affan00733]

Hi ,
I am a working professional and willing to participate in GSOC 2023 so want to solve this issue

[Jash-Shah]

Hey @affan00733, for GSoC, I would recommend you to focus more on the Gnuastro side of things for now, instead of pyGnuastro. Specifically starting with the GSoC 2023 Checklist and also joining the Gnuastro Element Room for further discussing the project with the Mentors!