Bash script to install the xonsh shell

install-xonsh.sh

#!/usr/bin/env bash
set -e

VIRTUAL_ENV_PATH=${VIRTUAL_ENV_PATH:-"$HOME/.local/share/virtualenvs"}

function yes_or_no {
    while true; do
        read -p "$* [y/n]: " yn
        case $yn in
            [Yy]*) return 0  ;;
            [Nn]*) echo "Aborted" ; return  1 ;;
        esac
    done
}

function check_py_version {
    VERSION=$(python3 --version)
    echo "$VERSION" | grep 'Python 3.[5-9]' > /dev/null
    if [[ $? == 1 ]]; then
        echo "Found $VERSION, but xonsh requires Python 3.5+"
        exit 1
    fi
}

function install_xonsh {
    XONSH_ENV_DIR="$VIRTUAL_ENV_PATH/xonsh"
    if [[ -d "$XONSH_ENV_DIR" ]]; then
        echo "Virtual env directory $XONSH_ENV_DIR already exists"
        exit 1
    fi

    python3 -m venv "$XONSH_ENV_DIR"
    source "$XONSH_ENV_DIR/bin/activate"
    pip install xonsh
}

function update_path_profile {
    NEWPATH="\$HOME/${VIRTUAL_ENV_PATH#$HOME/}/xonsh/bin:\$PATH"
    EXPORT_PATH="export PATH=\"$NEWPATH\""

    MSG="Add '$EXPORT_PATH' to ~/.profile?"
    yes_or_no "$MSG" || exit 0
    echo $EXPORT_PATH >> ~/.profile
}

function main {
    check_py_version
    install_xonsh
    update_path_profile
}

main

Download and run the script: curl -L https://gist.github.com/deeuu/0cf56150ba305d135ca4b9d25e70ce25/raw | bash