install inside github actions fails with poetry==1.2.0

[fruch]

• I am on the latest Poetry version.

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

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Docker build inside github actions

• Poetry version: 1.2.0

• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/fruch/e29e311e8edfe390acdd55f09f6102ea

Issue

running poetry install inside docker build when running on github action started failing once 1.2.0 was released: (4 days ago)

Dockerfile:

FROM python:3.10.6-bullseye
...
RUN poetry config virtualenvs.create false && poetry install --only main --no-root

the command returned with status code 1, without anymore information
adding

full log of the github action with -vvv:
https://gist.github.com/fruch/f4d542dba9533eb3a31b9824e7cfb102

locally on people's laptops this command was working just fine (including inside the docker build)

adding the following command, elevated the issue:

poetry config installer.max-workers 2

seems that the default number_of_cpus + 4 is problematic inside github action that has 2 cores only.

But couldn't figure exactly why...

[dimbleby]

you seem to be installing poetry system 1.2.0 system-wide, and then also system-wide installing a package that has an explicit dependency on poetry 1.1.13.

Probably it's obvious that this is a bad idea, I'm surprised it works ever.

[neersighted]

Both Poetry and your project need to be installed in to their own virtual environments -- please take a look at the following pattern in Docker for a minimal way to install Poetry and a package:

FROM python:3.10

ENV POETRY_HOME=/opt/poetry
RUN python3 -m venv $POETRY_HOME && \
    $POETRY_HOME/bin/pip install poetry==1.2.0

RUN git clone https://github.com/python-poetry/poetry /poetry

WORKDIR /poetry

ENV VIRTUAL_ENV=/poetry-env \
    PATH="/poetry-env/bin:$POETRY_HOME/bin:$PATH"

RUN python3 -m venv $VIRTUAL_ENV && \
    poetry install
    
CMD "pytest"

[github-actions]

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