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package Carton::Tree;
use strict;
use Carton::Dependency;
use Class::Tiny qw( cpanfile snapshot );
use constant STOP => -1;
sub walk_down {
my($self, $cb) = @_;
my $dumper; $dumper = sub {
my($dependency, $reqs, $level, $parent) = @_;
my $ret = $cb->($dependency, $reqs, $level);
return if $ret && $ret == STOP;
local $parent->{$dependency->distname} = 1 if $dependency;
for my $module (sort $reqs->required_modules) {
my $dependency = $self->dependency_for($module, $reqs);
if ($dependency->dist) {
next if $parent->{$dependency->distname};
$dumper->($dependency, $dependency->requirements, $level + 1, $parent);
} else {
# no dist found in lock
}
}
};
$dumper->(undef, $self->cpanfile->requirements, 0, {});
undef $dumper;
}
sub dependency_for {
my($self, $module, $reqs) = @_;
my $requirement = $reqs->requirements_for_module($module);
my $dep = Carton::Dependency->new;
$dep->module($module);
$dep->requirement($requirement);
if (my $dist = $self->snapshot->find_or_core($module)) {
$dep->dist($dist);
}
return $dep;
}
sub merged_requirements {
my $self = shift;
my $merged_reqs = CPAN::Meta::Requirements->new;
my %seen;
$self->walk_down(sub {
my($dependency, $reqs, $level) = @_;
return Carton::Tree::STOP if $dependency && $seen{$dependency->distname}++;
$merged_reqs->add_requirements($reqs);
});
$merged_reqs->clear_requirement('perl');
$merged_reqs->finalize;
$merged_reqs;
}
1;
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