pre-flight

#!/usr/bin/env bash
# shellcheck disable=SC1091,SC2059,SC2086
#
# Activates the test environment, installing dependencies, and updating tests
# and dependencies. Even though bash is specified above (for shellcheck), this
# activation script should work for both BASH and ZSH.
#
function in-virtualenv() {
    if [[ "${VIRTUAL_ENV-}" != "" ]]; then
        true; return
    else
        false; return
    fi
}

function has-virtualenv() {
    if test -d ./venv; then
        true
    else
        false
    fi
}

function create-virtualenv() {
    python3 -m venv venv
}

function activate-virtualenv() {
    source venv/bin/activate
}

function switch-directory() {
    # Script source both BASH and ZSH
    local source="${BASH_SOURCE:-${(%):-%x}}"

    # If the source is relative, prefix with the current directory
    if [[ $source != /* ]]; then
        source="$PWD/$source"
    fi

    local parent
    parent="$(dirname "$source")"

    if ! cd "$parent"; then
        echo "Could not switch to $parent"
        false; return
    fi

    if ! test -e './pre-flight'; then
        echo "Could not switch to $parent"
        false; return
    fi

    true; return
}

function is-supported-python() {
    local major
    major="$(python3 -c 'import sys; print(sys.version_info[0])')"

    local minor
    minor="$(python3 -c 'import sys; print(sys.version_info[1])')"

    if (( major < 3 )); then
        echo "Python $major.$minor is too old, please use 3.6+"
        false; return
    fi

    if (( minor < 6 )); then
        echo "Python $major.$minor is too old, please use 3.6+"
        false; return
    fi

    if ! python3 -c "import ssl" > /dev/null; then
        echo "Your Python setup does not support SSL. Please reinstall Python."
        false; return
    fi

    true; return
}

function is-git-clean() {
    if git diff-index --quiet HEAD; then
        true
    else
        false
    fi
}

function activate-acceptance-tests() {

    local gc='\e[0;32m'  # green
    local bc='\e[1;34m'  # blue
    local nc='\e[0m'  # reset

    local doing='*'
    local done="${gc}✓${nc}"

    printf "Preparing test-environment for cloudscale.ch acceptance tests…\n\n"

    if ! is-supported-python; then
        return
    fi

    if ! switch-directory; then
        return
    fi

    if ! has-virtualenv; then
        printf "%b Creating virtual environment\r" "$doing"
        create-virtualenv
        printf "%b Created virtual environment \n" "$done"
    fi

    if ! in-virtualenv; then
        activate-virtualenv
    fi

    printf "%b Updating tests\r" "$doing"
    git pull -q
    printf "%b Updated tests \n" "$done"

    printf "%b Updating requirements\r" "$doing"
    pip install --upgrade pip -q
    pip install -r requirements.txt --upgrade -q
    printf "%b Updated requirements \n\n" "$done"

    if ! test -e ./private; then
        printf "Please enter your cloudscale.ch API token: "
        read -s -r token
        printf "\n\n"

        printf "export CLOUDSCALE_API_TOKEN=%s\n" "$token" > private
    fi

    chmod 0600 private
    source private

    printf "You are now ready to test by typing %b\n\n" "${bc}py.test${nc}"
}

activate-acceptance-tests