getopts.txt

# This is not about getopts, but it *is* what you usually want when you end up looking for getopts and find there are like 3
# different versions of getopt[s] and they're all complicated and you just want the stupid one-off script or 10-line function
# to work and you'll just hack it together yourself again.

# This is how you hack it together for your one-off function 'foo':

function foo {
    local debug
    local silent
    ... vars, settings, whatever?
    while true; do
        case "$1" in          # case just looks at the first argument. if it's a -d, a var is reset
            -d)               # and the -d is taken out of args. now it goes back to the start of the loop
                debug=echo;
                shift
            ;;
            -s)               # so the next loop around, it might encounter -s and the same thing happens.
                silent='-s';  # but because while (true) it also works if -s comes before -d
                shift
            ;;
            *)                # first time it encounters something not in the cases, it exits the while loop.
                break
            ;;
        esac;
    done;
    actual_thing="$1"
    ... body of the function
}

# Notes:
# - every case ends with a double ;;. This can immediately follow the preceding command or statement, like shift;;
# - yes, every case starts with \e[38;5;208mthe-thing-to-match )\e[0m , bash is weird like that.