Could not build wheels for pendulum which use PEP 517

[weskerfoot]

• I am on the latest Pendulum version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• Alpine 3.11 in Docker

• Pendulum 2.1.0

Issue

I get an error about PEP 517 when trying to install Pendulum. The following Dockerfile (run with docker build .) reproduces the issue.

The error is ERROR: Could not build wheels for pendulum which use PEP 517 and cannot be installed directly

FROM python:3.7-alpine3.11
RUN apk update \
    && apk add gcc musl-dev python3-dev py3-setuptools libffi libffi-dev openssl-dev \
    && pip3 install pendulum==2.1.0

[altendky]

My quick looking suggests...

1. It's Alpine so the pendulum wheels aren't used so that explains the issue not being as wide spread as it might be
2. The poetry tarball doesn't list setuptools as an install_requires and thus the isolated build env doesn't have setuptools (the poetry .whl should be used but I know where to look in the tarball...)

Now I'm not sure of the nuances here and I haven't tested my theory quite yet but... FWIW.

[weskerfoot]

Workaround (for this situation, running in Docker with Alpine)

FROM python:3.7-alpine3.11
RUN apk update \
    && apk add gcc musl-dev python3-dev py3-setuptools libffi libffi-dev openssl-dev \
    && pip3 install poetry \
    && pip3 install --no-build-isolation pendulum==2.1.0

[aniljaiswal]

Any workarounds for people using pipenv? I'm using the same docker setup but using pipenv and lock files.

[Hellowlol]

I'm having the same issue in the home assistant 107.7 (hassio)

[weskerfoot]

Any workarounds for people using pipenv? I'm using the same docker setup but using pipenv and lock files.

Does pipenv have a similar option to disable build isolation? That would most likely work, though I'm not really familiar with how pipenv does things.

[davegallant]

❯ colordiff pendulum-2.0.5/setup.py pendulum-2.1.0/setup.py
2c2
< from distutils.core import setup
---
> from setuptools import setup

Does anyone know where this setup.py is being generated? It has changed in 2.1.0
https://files.pythonhosted.org/packages/e5/dc/d79687e49cafbdee73078b28c57d2a2555735c88d672239e4cb19a6a141a/pendulum-2.1.0.tar.gz

[altendky]

Poetry would be building it I would think. But, pyproject.toml will get hit first (for 517-compatible pips) and that specifies poetry as the build backend not setuptools. And poetry is missing an install_requires for setuptools afaict thus causing the error. So it seems to me that either that needs to be addressed or pendulum needs to build a pyproject.toml with a build-system requires including setuptools and the corresponding build-backend.

[altendky]

@davegallant, commit-wise it looks to be: python-poetry/poetry@f759876

[altendky]

I just realized we don't have a full log here. @weskerfoot, could you add that?