Start Python virtual environment and install packages

start

#!/bin/sh

# USAGE: 
#       source start

venv_folder=".venv"

packages=(
    "pygame==2.5.2"
    "numpy==1.26.0"
    # add more packages here
)

python_execs=(
    $(command -v python)
    $(command -v python3)
    $(command -v python3.11)
    $(command -v python3.10)
)

# Check if a Python virtual environment is active and deactivate it
if [[ $VIRTUAL_ENV != "" ]]; then
    deactivate
fi

# Find Python executable
for exec in "${python_execs[@]}"; do
    if [[ -x "$exec" ]]; then
        python_exec="$exec"
        break
    fi
done

if [[ -z "$python_exec" ]]; then
    echo "Python executable not found"
    exit 1
fi

# Create a virtual environment if it does not exist
if [[ ! -d $venv_folder ]]; then
    install_requirements=true
    $python_exec -m venv $venv_folder
fi

# Activate the virtual environment
echo "Activating virtual environment"
source $venv_folder/bin/activate

# Install requirements if the virtual environment was just created
if [[ $install_requirements == true ]]; then
    echo "Installing requirements"
    for package in "${packages[@]}"; do
        pip install "$package"
    done
    unset install_requirements
fi