poetry install exits with exit code 1 when run in a docker container

[achow101]

• 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: Debian stretch docker container, Arch host

• Poetry version: 1.1.4

• Link of a Gist with the contents of your pyproject.toml file: https://github.com/bitcoin-core/HWI/blob/def565b5ac5d98b5fcc453328fc9a20207c6e00a/pyproject.toml

Issue

When trying to install the dependencies with poetry for my project in a docker container, poetry just exits with no errors or warning, just an exit code of 1.

The Dockerfile is https://github.com/bitcoin-core/HWI/blob/def565b5ac5d98b5fcc453328fc9a20207c6e00a/contrib/build.Dockerfile and the script being run is https://github.com/bitcoin-core/HWI/blob/def565b5ac5d98b5fcc453328fc9a20207c6e00a/contrib/build_bin.sh. It specifically errors on the line poetry install -E qt. Changing this command to include -vvv does not effect the output.

The output is

+ poetry install -E qt
Creating virtualenv hwi-G-6EQZNy-py3.6 in /root/.cache/pypoetry/virtualenvs
Installing dependencies from lock file

Package operations: 28 installs, 0 updates, 0 removals

This previously worked when poetry 1.0.10 was used and it seems like 1.1.0 is the version where this stopped working.

If I run this on my host, also with 1.1.4, there are no issues. It seems to only be in this container. The script doesn't seem to make a difference; I can have a shell in the container, do poetry install manually, and it still fails in the same way.

[brandon-leapyear]

✨ This is an old work account. Please reference @brandonchinn178 for all future communication ✨

---

I got the same thing, and bisecting my changes, I noticed that it happens when LANG=en_US.UTF-8 is set, but the Docker image I'm using doesn't have that locale configured. I think this is a bug, poetry should either be independent of a misconfigured LANG setting, or show better logs

[achow101]

I was able to work around this by adding

ENV LC_ALL=C.UTF-8
ENV LANG=C.UTF-8
ENV LANGUAGE=C.UTF-8

to my Dockerfile.

But I'm going to leave this issue open because I think it's a bug that poetry is existing like this when no locale is set.

---

A way to replicate this outside of docker is to temporarily unset the locale, e.g.:

env LC_ALL= LANG= LANGUAGE= poetry install

[jtmoon79]

If poetry must have LOCALE, then it must inform the user why it is failing, i.e. it should raise some useful error.

[brandon-leapyear]

✨ This is an old work account. Please reference @brandonchinn178 for all future communication ✨

---

Found the issue:

poetry/poetry/installation/executor.py

Line 199 in a12d142

" <fg=blue;options=bold>•</> {message}: <fg=blue>Pending...</>".format(

LANG= python3.6 -c 'print("•")'

fails on python 3.6, but not 3.7+:
https://docs.python.org/3/whatsnew/3.7.html

Avoiding the use of ASCII as a default text encoding

[github-actions]

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