# Completion for gpg with long options
_gpg() {
    local word=${COMP_WORDS[COMP_CWORD]}

    # Bail if no gpg(1) or the word doesn't start with two dashes
    if ! hash gpg 2>/dev/null || [[ $word != --* ]]; then
        COMPREPLY=()
        return 1
    fi

    # Read options from the output of gpg --dump-options
    local -a options
    local option
    while read -r option; do
        options=("${options[@]}" "$option")
    done < <(gpg --dump-options 2>/dev/null)

    # Generate completion reply
    COMPREPLY=( $(compgen -W "${options[*]}" -- "$word") )
}
complete -F _gpg -o default gpg