exit 1

fi

# Update apt caches.

apt-get update -qq

# Install development tools.

apt-get install -qq -y git virtualenv

# Install Python build dependencies.

apt-get install -qq -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev xz-utils tk-dev libxml2-dev libffi-dev

# Import public keys for validating Python releases.

sudo -i -u vagrant gpg -q --import /vagrant/provision/python_releases_signing_keys.pub

# Download and build additional Python versions.

python_versions=("3.8.18" "3.9.18" "3.10.13" "3.11.8")

work_directory="/home/vagrant/src"

echo "Setting-up work directory."

sudo -i -u vagrant mkdir -p "$work_directory"

for version in "${python_versions[@]}"; do

    # Set-up information about Python version.

    interpreter="/usr/local/bin/python${minor_version}"

    source_archive_link="https://www.python.org/ftp/python/${version}/Python-${version}.tar.xz"

    source_archive="$work_directory/Python-${version}.tar.xz"

    source_signature_link="https://www.python.org/ftp/python/${version}/Python-${version}.tar.xz.asc"

    source_signature="${source_archive}.asc"

    source="$work_directory/Python-${version}"

    # Check if the Python version has already been installed or not.

    if [[ ! -e $interpreter ]]; then

        echo

        echo

        echo "Installing Python $version"

        echo "=========================="

        echo "Downloading..."

        sudo -i -u vagrant wget -q -c -O "$source_archive" "$source_archive_link"

        sudo -i -u vagrant wget -q -c -O "$source_signature" "$source_signature_link"

        echo "Verifying signature..."

        sudo -i -u vagrant gpg --quiet --trust-model always --verify "$source_signature" "$source_archive"

        echo "Removing stale source files..."

        rm -rf "$source"