Demo script to prove that without VIRTUAL_ENV, Poetry won't use venvs from pyenv-virtualenv

pyenv-poetry-test.sh

#!/bin/bash
set -u -e -o pipefail

#title           : pyenv-poetry-test.sh
#description     : A simple script which I wrote to discover what information Poetry is
#                : relying on when it should use the virtualenv created by pyenv.
#                : See https://github.com/python-poetry/poetry/issues/5956
#                : and https://github.com/pyenv/pyenv-virtualenv/issues/348
#author		     : Simon Meggle, <simon.meggle@elabit.de>
#date            : 20220608
#version         : 0.1 
#usage		     : bash pyenv-poetry-test.sh create 
#==============================================================================

export PROJECT_DIR="project"
export PYENV_VENV_NAME="$PROJECT_DIR"
export ROOT_DIR="$(pwd)"
export PVERSION="3.8.13"

function create() {
    log "Creating and entering $PROJECT_DIR"
    mkdir -p $PROJECT_DIR && pushd $PROJECT_DIR > /dev/null
    log "pyenv - create $PYENV_VENV_NAME: 'pyenv virtualenv $PVERSION $PYENV_VENV_NAME'"
    pyenv virtualenv "$PVERSION" "$PYENV_VENV_NAME"
    log "pyenv - set local version: 'pyenv local $PYENV_VENV_NAME'"
    pyenv local "$PYENV_VENV_NAME"
    log "pyenv - show local version: 'pyenv local'"
    pyenv local
    log "poetry - config: "
    poetry config --list
    log "poetry - initialization: 'poetry init -n --name=$PROJECT_DIR --python='^3.8' --dependency=robotframework'"
    poetry init -n --name=$PROJECT_DIR --python='^3.8' --dependency=robotframework
    log "poetry - install in pyenv: 'pyenv exec poetry install'"
    # ### WITHOUT THIS VARIABLE, POETRY WON'T USE THE VIRTUALENV VERSION SET FOR THIS FOLDER ###
    # (it will prepare the venv in the "poetry way")
    export VIRTUAL_ENV=$(pyenv virtualenv-prefix)/envs/$PYENV_VENV_NAME
    poetry install -vv
    log "Pip list:"
    pip list
}

function tidy() {
    log "Tidying up"
    remove_project
    remove_venv
    echo "-----"
}

function remove_project() {
    log "Removing project"
    cd $ROOT_DIR
    log "Executing: rm -rf $PROJECT_DIR"
    set +e
    rm -rf $PROJECT_DIR
    set -e
}

function remove_venv() {
    log "Deleting pyenv-venv $PYENV_VENV_NAME"
    log "Executing: pyenv virtualenv-delete -f $PYENV_VENV_NAME"
    set +e
    pyenv virtualenv-delete -f $PYENV_VENV_NAME
    set -e
}

function main() {
    log "PWD = $PWD"
    log "Versions:"
    log "  pyenv: $(pyenv --version)"
    log "  poetry: $(poetry --version)"
    log "  pyenv global: $(pyenv global)"
    log "---"    
    if [[ "$1" == "create" ]]; then
        tidy 
        create
    elif [[ "$1" == "tidy" ]]; then
        tidy
    else
        echo "Usage: $0 [create|tidy]"
    fi
}

function log {
    echo "❯ $1"
}

print_env() {
    printenv| grep -v "p9k" | egrep "VIRT|PYT|ENV" | sort
}

main "$@"