ERROR Backend subprocess exited when trying to invoke get_requires_for_build_sdist

[rvernica]

The build module fails for sdist or wheel. This is an existing project and this build step used to work properly.

> python3 -m build --sdist
* Creating venv isolated environment...
* Installing packages in isolated environment... (setuptools >= 40.8.0, wheel)
* Getting build dependencies for sdist...
Traceback (most recent call last):
  File "/root/.local/lib/python3.6/site-packages/pep517/in_process/_in_process.py", line 351, in <module>
    main()
  File "/root/.local/lib/python3.6/site-packages/pep517/in_process/_in_process.py", line 333, in main
    json_out['return_val'] = hook(**hook_input['kwargs'])
  File "/root/.local/lib/python3.6/site-packages/pep517/in_process/_in_process.py", line 285, in get_requires_for_build_sdist
    return hook(config_settings)
  File "/tmp/build-env-zul88ngt/lib64/python3.6/site-packages/setuptools/build_meta.py", line 167, in get_requires_for_build_sdist
    return self._get_build_requires(config_settings, requirements=[])
  File "/tmp/build-env-zul88ngt/lib64/python3.6/site-packages/setuptools/build_meta.py", line 143, in _get_build_requires
    self.run_setup()
  File "/tmp/build-env-zul88ngt/lib64/python3.6/site-packages/setuptools/build_meta.py", line 268, in run_setup
    self).run_setup(setup_script=setup_script)
  File "/tmp/build-env-zul88ngt/lib64/python3.6/site-packages/setuptools/build_meta.py", line 158, in run_setup
    exec(compile(code, __file__, 'exec'), locals())
  File "setup.py", line 31, in <module>
    import scidbbridge
  File "/foo/__init__.py", line 24, in <module>
    import boto3
ModuleNotFoundError: No module named 'boto3'

ERROR Backend subprocess exited when trying to invoke get_requires_for_build_sdist

boto3 in listed in setup.py:

setup(
    name=NAME,
    version=VERSION,
    description=DESCRIPTION,
    long_description=LONG_DESCRIPTION,
    author=AUTHOR,
    author_email=AUTHOR_EMAIL,
    download_url=DOWNLOAD_URL,
    license=LICENSE,
    packages=['scidbbridge'],
    install_requires=[
        'boto3>=1.14.12',

This is the package source and here is the package on PyPI.

I tired the build on both Python 3.10.8 with build 0.10.0 and Python 3.6.8 with build 0.9.0. The boto3 package is installed on the host system.

[henryiii]

You can't import boto3 inside the isolated environment unless you install it inside the isolated environment (in pyproject.toml). Though do you really need to? Usually, to make the SDist/wheel, you should not need the imports (which are only install requirements). Perhaps you are trying to import your own package inside setup.py? This is an antipattern; setuptools and most other backends provide ways to single-source the version without loading your package during the SDist/wheel build, which I'd guess is what you might be trying to do? Oh, yes, you linked the source, that's exactly why. I'd either use setuptool's setup.cfg version = attr: scridbbridge.__version__ option for version (and hope it can read the AST), or use a backend like hatchling that can read the version via regex.

[jmwoloso]

Thanks a million @henryiii

I was having a similar issue as we're moving from setup.py over to build for our project and....sure enough I was importing our library in setup.py. Problem solved!