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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: Useless Use Of Regexes
Date: Fri, 28 Mar 2025 20:25:19 -0000 (UTC)
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On Fri, 28 Mar 2025 12:21:20 +0100, marrgol wrote:

> On 2025-03-27 at 22:05 Lawrence D'Oliveiro wrote:
>>
>> On Thu, 27 Mar 2025 16:51:16 +0100, Marc Haber wrote:
>>
>>> Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>>>
>>>> On Thu, 27 Mar 2025 07:58:32 +0100, Marc Haber wrote:
>>>>>
>>>>> You could have it easier with getopt ...
>>>>
>>>> Last I checked, getopt doesn’t do long options.
>>>
>>> You should check again.
>> 
>> ldo@theon:~> help getopt getopts: getopts optstring name [arg ...]
>> […]
> 
> You're quoting help to 'getopts' shell built-in command --
> you are mistaking it for 'getopt' program from util-linux.

I had a look at that, too. Here’s an extract from the example script
/usr/share/doc/util-linux/examples/getopt-example.bash demonstrating
the use of the getopt(1) command from util-linux:

----
TEMP=$(getopt -o 'ab:c::' --long 'a-long,b-long:,c-long::' -n 'example.bash' -- "$@")

if [ $? -ne 0 ]; then
    echo 'Terminating...' >&2
    exit 1
fi

# Note the quotes around "$TEMP": they are essential!
eval set -- "$TEMP"
unset TEMP

while true; do
    case "$1" in
        '-a'|'--a-long')
            echo 'Option a'
            shift
            continue
        ;;
        '-b'|'--b-long')
            echo "Option b, argument '$2'"
            shift 2
            continue
        ;;
        '-c'|'--c-long')
            # c has an optional argument. As we are in quoted mode,
            # an empty parameter will be generated if its optional
            # argument is not found.
            case "$2" in
                '')
                    echo 'Option c, no argument'
                ;;
                *)
                    echo "Option c, argument '$2'"
                ;;
            esac
            shift 2
            continue
        ;;
        '--')
            shift
            break
        ;;
        *)
            echo 'Internal error!' >&2
            exit 1
        ;;
    esac
done
----

Doesn’t seem to me that’s saving much effort. Does it look like a
saving of effort to you?