#!/bin/bash

set -eo pipefail

main() {
    if [ "${INSTALL_DEPENDENCIES}" == "0" ]; then
        echo "Dependencies installation disabled. Doing nothing."
        exit
    fi

    install_additional_packages
}

# Return 3 for unknown distribution
install_additional_packages() {
    if [ -z "${ADDITIONAL_PACKAGES}" ]; then
        return
    fi

    echo "Installing additional packages '${ADDITIONAL_PACKAGES}'..."

    if [ -f "/etc/debian_version" ]; then
        export DEBIAN_FRONTEND=noninteractive
        apt-get update -y
        apt-get install -y ${ADDITIONAL_PACKAGES}
    elif [ -f "/etc/alpine-release" ]; then
        apk update
        apk add --no-cache ${ADDITIONAL_PACKAGES}
    else
        return 3
    fi
}

main