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Config::MVP::Assembler::WithBundles(3) User Contributed Perl Documentation Config::MVP::Assembler::WithBundles(3)

Config::MVP::Assembler::WithBundles - a role to make assemblers expand bundles

version 2.200012

Config::MVP::Assembler::WithBundles is a role to be composed into a Config::MVP::Assembler subclass. It allows some sections of configuration to be treated as bundles. When any section is ended, if that section represented a bundle, its bundle contents will be unrolled and will replace it in the sequence.

A package is considered a bundle if "package_bundle_method" returns a defined value (which is the name of a method that will be called on that package to retrieve its bundle config).

  my $method = $assembler->package_bundle_method($package);

The default implementation looks for a method called "mvp_bundle_config", but "package_bundle_method" can be replaced with one that returns the name of a different bundle-identifying method-name.

Bundles are expanded by a call to the assembler's "replace_bundle_with_contents" method, like this:

  $assembler->replace_bundle_with_contents($section, $method);

The default "replace_bundle_with_contents" method deletes the section from the sequence. It then gets a description of the new sections to introduce, like this:

  my @new_config = $bundle_section->package->$method({
    name    => $bundle_section->name,
    package => $bundle_section->package,
    payload => $bundle_section->payload,
  });

(We pass a hashref rather than a section so that bundles can be expanded synthetically without having to laboriously create a new Section.)

The returned @new_config is a list of arrayrefs, each of which has three entries:

  [ $name, $package, $payload ]

Each arrayref is converted into a section in the sequence. The $payload should be an arrayref of name/value pairs to be added to the created section.

Ricardo Signes <rjbs@cpan.org>

This software is copyright (c) 2021 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

2021-01-10 perl v5.32.1

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