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.IX Title "Config::MVP::Assembler::WithBundles 3"
.TH Config::MVP::Assembler::WithBundles 3 2026-10-25 "perl v5.44.0" "User Contributed Perl Documentation"
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.SH DESCRIPTION
.IX Header "DESCRIPTION"
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.
.PP
A package is considered a bundle if \f(CW\*(C`package_bundle_method\*(C'\fR returns a
defined value (which is the name of a method that will be called on
that package to retrieve its bundle config).
.PP
.Vb 1
\&  my $method = $assembler\->package_bundle_method($package);
.Ve
.PP
The default implementation looks for a method called \f(CW\*(C`mvp_bundle_config\*(C'\fR, but
\&\f(CW\*(C`package_bundle_method\*(C'\fR can be replaced with one that returns the name of a
different bundle\-identifying method\-name.
.PP
Bundles are expanded by a call to the assembler\*(Aqs
\&\f(CW\*(C`replace_bundle_with_contents\*(C'\fR method, like this:
.PP
.Vb 1
\&  $assembler\->replace_bundle_with_contents($section, $method);
.Ve
.SS replace_bundle_with_contents
.IX Subsection "replace_bundle_with_contents"
The default \f(CW\*(C`replace_bundle_with_contents\*(C'\fR method deletes the section from the
sequence.  It then gets a description of the new sections to introduce, like
this:
.PP
.Vb 5
\&  my @new_config = $bundle_section\->package\->$method({
\&    name    => $bundle_section\->name,
\&    package => $bundle_section\->package,
\&    payload => $bundle_section\->payload,
\&  });
.Ve
.PP
(We pass a hashref rather than a section so that bundles can be expanded
synthetically without having to laboriously create a new Section.)
.PP
The returned \f(CW@new_config\fR is a list of arrayrefs, each of which has three
entries:
.PP
.Vb 1
\&  [ $name, $package, $payload ]
.Ve
.PP
Each arrayref is converted into a section in the sequence.  The \f(CW$payload\fR
should be an arrayref of name/value pairs to be added to the created section.