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#!/usr/bin/env bash
#
# Helper script to run a command inside a virtualenv
#
# This is too simple, and you might want to use
# virtualenvwrapper instead:
#
# https://tracker.debian.org/pkg/virtualenvwrapper
# https://virtualenvwrapper.readthedocs.io/en/latest/
# https://doughellmann.com/projects/virtualenvwrapper/
#
# Or pipx:
#
# https://pipx.pypa.io/stable/
# https://tracker.debian.org/pkg/python-pipx
#
# Parameters
BASENAME="`basename $0`"
COMMAND="$1"
VENV="${VENV:$HOME/.virtualenvs/$COMMAND}"
# Check for a test
if [ -z "$COMMAND" ]; then
echo "usage: $BASENAME <command> [args]"
exit 1
fi
# Deactivate any active virtualenv
deactivate &> /dev/null
# Create and activate a virtualenv as needed
if [ ! -e "$VENV" ]; then
mkdir -p `dirname $VENV`
python -m venv $VENV
. $VENV/bin/activate
pip install --upgrade pip
pip install $COMMAND
else
# Check for a virtualenv
if [ ! -e "$VENV/bin/activate" ]; then
echo "$BASENAME: missing or invalid virtualenv"
exit 1
fi
# Activate the virtualenv
. $VENV/bin/activate
fi
# Run
$*
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