Is there a way to extende META6?

[FCO]

I trying to use META6 on https://github.com/FCO/6pm, but I need to add a new field on it, scripts. I've tried extending it using it as a parent class of my custom class

use META6;

unit class App::six-pm::Meta6 is META6;

has IO::Path $!file handles <f e d x> = "./META6.json".IO;
has Str %.provides is rw is specification(Optional) is json-skip-null;

method save() {$!file.spurt: $.to-json; self}

and augmenting it:

augment class META6 { has %.scripts = { "test" => "" } }
say META6.new: :file("./META6.json")

with no luck. Is there a way of doing it?

[jonathanstowe]

Let me think about that for a bit, the same issue may arise with anything that does JSON::Class TBH.

[jonathanstowe]

Hi,
Unless I'm completely missing something, inheritances does work, e.g:

use META6;

class Foo is META6 {
    has %.scripts;

}


say Foo.new( file => './META6.json').to-json;

And the scripts property is there. And amending your first example:

use META6;

use META6;

class Foo is META6 {
    has %.scripts;

    has IO::Path $!file handles <f e d x> = "./META6foo.json".IO;

    method save() {
        $!file.spurt: $.to-json;
        self
    }
}


my $f= Foo.new( file => './META6.json');

$f.scripts<test> = "Foo";

$f.save;

Seems to work as expected too. So I'm not sure where to go with this unless you have a specific example that isn't working as you expect.

[FCO]

I was thinking that custom traits would be needed, sorry.

[jonathanstowe]

The specification traits are only for informational purposes and used by Test::META, the json-skip-null and friends can be brought in with use JSON::Class if they're needed.

[FCO]

Thank you very much!

[JJ]

@FCO altermatively, you could try Pakku::Meta, a parser for the alternative package manager Pakku.

[JJ]

Also, my option would be to use a special "directory" for resources, such as "scripts/whatever".

[jonathanstowe]

On a related note, I'm thinking of ways of embedding an entire Oyatul layout in the META6.json so that Igo doesn't need a separate file.