== I need to use _getopts_ sooner (and more often) in Bourne shell scripts

I have this flaw in my Bourne shell scripting; in shell scripts and
shell scripts alone, I find it all too easy and tempting to reach
for ad-hoc option processing when I add the first option to a script.
Inevitably, handling the first option will look something like:

.pn prewrap on

>  [...]
>  SOMEVAR=0
>  if [ "$1" = "-L" ]; then
>     SOMEVAR=1; shift
>  fi
>  [...]

When a second option shows up, it sometimes winds up getting wedged
awkwardly into the same sort of code. Maybe the options conflict
so they'll never get used together in practice, or I'll tell myself
that I'll always remember the order, or some equally bad excuse.

Doing this is a mistake, and I need to accept that. Rather than ever
writing ad-hoc option processing code, I should be using _getopts_
in my scripts right from the start even in tiny little scripts. Even
using _getopts_ for a single option is not that much more code over the
simple version above, and it has better error handling. And of course,
adding more options is much simpler and works much better if I'm using
_getopts_ already.

(Probably I should just memorize and master a standard _getopts_
stanza so I can drop it into everything by reflex. But that's going
to take time, and also not reflexively reaching for the quick
solution for single options.)

I'm not entirely sure why I'm so reluctant in practice to use
_getopts_, but for whatever reason it's not part of my shell landscape
most of the time. This is silly, as _getopts_ has existed for a
long time and is [[a Single Unix Specification standard
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/getopts.html]].
As a practical matter it's long since been supported everywhere
that I'm ever going to run a shell script. I need to get with the times
and update my Bourne shell habits.

(This entry is brought to you by me updating some scripts today,
trying to add a second option to them in a terrible way, and then
telling myself that I should be doing this right and switching them
over to using _getopts_. The resulting shell script code is both
better and shorter.)