Pipenv 2020 error's out not finding the requirement.txt

Issue description

On a empty folder installing - pipenv install thoth-sourcemanagement Error’s out stating missing requirements.txt However works as expected with pipenv 2018 version.

Steps to replicate

Environment - Fedora 32 You can also replicate the error on a katacoda environment - https://www.katacoda.com/courses/ubuntu/playground1804

Try installing the following Pipfile with pipenv 2020 Provide the steps to replicate (which usually at least includes the commands and the Pipfile).

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
thoth-sourcemanagement = "*"

[requires]
python_version = "3.6"

[techalchemy]

I did a bit of extra work to try parsing setup.py without breaking, and it seems to have paid off in your case. For this case and others like it, pipenv falls back to requirementslib which ultimately tries to build a wheel using the pep517 wheel builder and, if unspecified, the setuptools legacy build backend. If that is successful we will consume metadata from the built wheel – this is obviously much less efficient than just parsing textual metadata that is declared in a manifest, but it’s kind of neat that it works again ^^

I’ll close this issue for now as I was able to confirm this myself directly with requirementslib:

>>> from requirementslib.models.requirements import Requirement                                                                                            
>>> r = Requirement.from_line("-e .")                                                                                                                      
>>> r.run_requires()                                                                                                                                       
{'name': 'thoth-sourcemanagement', 'version': '0.2.9', 'base_dir': '/tmp/reqlib-srczugi9sxi/source-management', 'ireq': <InstallRequirement object: thoth-sourcemanagement==0.2.9@ file:///tmp/source-management from file:///tmp/source-management editable=True>, 'build_backend': 'setuptools.build_meta:__legacy__', 'build_requires': ('wheel', 'setuptools>=40.8'), 'requires': {'ogr': Requirement.parse('ogr'), 'requests': Requirement.parse('requests'), 'delegator.py': Requirement.parse('delegator.py')}, 'python_requires': '>=3.6', 'extra_kwargs': {'build_dir': '/tmp/reqlib-buildyrhlbxd0', 'src_dir': '/tmp/reqlib-srczugi9sxi', 'download_dir': '/home/techalchemy/.cache/pipenv/pkgs', 'wheel_download_dir': '/home/techalchemy/.cache/pipenv/wheels'}, 'setup_cfg': PosixPath('/tmp/reqlib-srczugi9sxi/source-management/setup.cfg'), 'setup_py': PosixPath('/tmp/reqlib-srczugi9sxi/source-management/setup.py'), 'pyproject': PosixPath('/tmp/reqlib-srczugi9sxi/source-management/pyproject.toml')}

[taybin]

FWIW, I can’t duplicate this anymore, even without updating my libraries to not use a requirements.txt file. Still planning on doing that, but not having my builds break is also a relief. 👍