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package Config::MVP::Assembler::WithBundles;
BEGIN {
$Config::MVP::Assembler::WithBundles::VERSION = '2.101650';
}
use Moose::Role;
# ABSTRACT: a role to make assemblers expand bundles
use Params::Util qw(_HASHLIKE _ARRAYLIKE);
sub package_bundle_method {
my ($self, $pkg) = @_;
return unless $pkg->can('mvp_bundle_config');
return 'mvp_bundle_config';
}
after end_section => sub {
my ($self) = @_;
my $seq = $self->sequence;
my ($last) = ($seq->sections)[-1];
return unless $last->package;
return unless my $method = $self->package_bundle_method($last->package);
$self->replace_bundle_with_contents($last, $method);
};
sub replace_bundle_with_contents {
my ($self, $bundle_sec, $method) = @_;
my $seq = $self->sequence;
$seq->delete_section($bundle_sec->name);
$self->_add_bundle_contents($method, {
name => $bundle_sec->name,
package => $bundle_sec->package,
payload => $bundle_sec->payload,
});
};
sub _add_bundle_contents {
my ($self, $method, $arg) = @_;
my @bundle_config = $arg->{package}->$method($arg);
PLUGIN: for my $plugin (@bundle_config) {
my ($name, $package, $payload) = @$plugin;
Class::MOP::load_class($package);
if (my $method = $self->package_bundle_method( $package )) {
$self->_add_bundle_contents($method, {
name => $name,
package => $package,
payload => $payload,
});
} else {
my $section = $self->section_class->new({
name => $name,
package => $package,
});
if (_HASHLIKE($payload)) {
# XXX: Clearly this is a hack. -- rjbs, 2009-08-24
for my $name (keys %$payload) {
my @v = ref $payload->{$name}
? @{$payload->{$name}}
: $payload->{$name};
$section->add_value($name => $_) for @v;
}
} elsif (_ARRAYLIKE($payload)) {
for (my $i = 0; $i < @$payload; $i += 2) {
$section->add_value(@$payload[ $i, $i + 1 ]);
}
} else {
Carp::confess("don't know how to interpret section payload $payload");
}
$self->sequence->add_section($section);
$section->finalize;
}
}
}
no Moose;
1;
__END__
=pod
=head1 NAME
Config::MVP::Assembler::WithBundles - a role to make assemblers expand bundles
=head1 VERSION
version 2.101650
=head1 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.
A package is considered a bundle if the this returns a defined method:
my $method = $assembler->package_bundle_method($package);
The default implementation looks for a method callde C<mvp_bundle_config>, but
C<package_bundle_method> can be replaced to allow for other bundle-identifying
information.
Bundles are expanded by a call to the assembler's
C<replace_bundle_with_contents> method, like this:
$assembler->replace_bundle_with_contents($section, $method);
=head2 replace_bundle_with_contents
The default C<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 C<@new_config> is a list of arrayrefs, each of which has three
entries:
[ $name, $package, $payload ]
Each arrayref is converted into a section in the sequence. The C<$payload>
should be an arrayref of name/value pairs to be added to the created section.
=head1 AUTHOR
Ricardo Signes <rjbs@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2010 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.
=cut
|
