bash bash bash

x.sh

#!/usr/bin/env bash

myscript () {
    typeset a i k;

    # setup cmd; declare functions
    for i in "${!g_@}"; do
        typeset -n j=$i;
        typeset "action_${!j}";
        for k in ${j}; do
            #danger?
            . /dev/fd/0 <<< "function ${k} () {
                readonly action_${!j}=$k 2>/dev/null || {
                    printf 'error: use only one cmd of: %s\n' '"$j"' 1>&2;
                    return 1;
                };
            }";
        done;
    done;

    # setup options
    :;

    # parse args
    for a; do
        if
            typeset -F "$a" 1>/dev/null 2>&1;
        then
            "$a" && unset -f a || return 1;
        else
            echo unkown cmd ... 2>&1;
            return 1;
        fi;
    done;

    for i in "${!action_@}"; do
        typeset -n j=$i;
        printf '%s: %s\n' "${!j}" "$j";
    done;
};

export \
    g_1='create remove' \
    g_2='modify';

echo test 1:
'myscript' create modify remove;

echo test 2:
'myscript' create modify;