Re: I need help with get-options

> On Apr 1, 2025, at 03:55, ToddAndMargo via perl6-users <[email protected]> wrote:

--snip--

> I have the following run string:
> raku C:\NtUtil\RLA.Backup.raku --rotates 345 --UNC_BackupPath \\192.168.240.10\Backup\MyDocsBackup\backup1 --debug
> 
> 
> use Getopt::Long;  # get-options
> get-options('debug' => $CommandLine.debug );
> 
> error out with
>    No such method 'debug' for invocant of type 'List'
> 
> What am I doing wrong?

You are not giving us a https://en.wikipedia.org/wiki/Minimal_reproducible_example , so I am having to guess.
My guess is that you have defined `$CommandLine` in a way that lacks a writeable `.debug` method.

You *could* simplify the call to `get-options` to use a simple temp variables (similar to the documentation), then copy the temp into some `debug` and similar parts  of your more complex `$CommandLine` data structure, but I expect your full code is trying to avoid such temp vars.

Here is a complete runnable program to demonstrate skipping any temp vars, using a wild guess that `$CommandLine` is the sole instance of a OO data class:

    class CommandLineInfo {
        has Bool $.debug is rw = False;
    }

    my CommandLineInfo $CommandLine .= new;

    use Getopt::Long;
    get-options( 'debug' => $CommandLine.debug );

    say $CommandLine.debug; # Will be `True` or `False`, depending on command-line arg.

If this code does not align with (and is not adaptable to) your use case, we (or at least *I*) will need more information from you, especially the definition of `$CommandLine` in your current code.
As always, minimal *runnable* code will allow any of us to provide an answer to you more quickly.

FWIW, I use `sub MAIN`, but if I were to use `Getopt::Long`, I might use the (under-documented) method of having `get-options` build the data structure itself:
	use Getopt::Long;
	my %CommandLine = get-options( 'debug', 'rotates=i', 'UNC_BackupPath=p' ).hash;
	say ?%CommandLine<debug>;   # Just the `debug` argument, forced to Bool
	say %CommandLine.raku;      # All the specified arguments.


> Many thanks,
> -T

You are very welcome!
-- 
Bruce Gray (Util of PerlMonks)