function _ddev() {
    mapfile -t COMPREPLY < <(compgen -W \
        "$(curl -sfL 'https://api.github.com/repos/docker-library/official-images/git/trees/master?recursive=1' | sed -nE 's/.*"library\/(.+)",$/\1/p')" \
        -- "${COMP_WORDS[1]}")
}
complete -F _ddev ddev