Rex dynamic CMDB with roles

Rexfile

use v5.24; # for postfix dereferencing below
use strict;
use warnings;

use Rex -feature => [ '1.4', 'exec_autodie' ];
use Rex::CMDB;

use File::Spec;
use YAML qw(LoadFile);

set cmdb => {
    type => 'YAML',
    path => sub {
        my ( $self, $item, $host ) = @_;

        my $cmdb_directory = '/my/path/to/cmdb';
        my $server_file    = File::Spec->join( $cmdb_directory, 'hosts', "$host.yml" );
        my @cmdb_files     = ($server_file);

        my $server_yaml = LoadFile($server_file);

        my @roles_files = map { File::Spec->join( $cmdb_directory, 'roles', "$_.yml" ) }
          $server_yaml->{roles}->@*;

        push @cmdb_files, @roles_files;

        return @cmdb_files;
    },
    merge_behavior => 'LEFT_PRECEDENT',
};