File Coverage

blib/lib/CPAN/Meta/Check.pm

Criterion	Covered	Total	%
statement	45	45	100.0
branch	18	22	81.8
condition	2	2	100.0
subroutine	11	11	100.0
pod	3	3	100.0
total	79	83	95.1

package CPAN::Meta::Check;
# vi:noet:sts=2:sw=2:ts=2
$CPAN::Meta::Check::VERSION = '0.017';
use strict;
use warnings;

use base 'Exporter';
our @EXPORT = qw//;
our @EXPORT_OK = qw/check_requirements requirements_for verify_dependencies/;
our %EXPORT_TAGS = (all => [ @EXPORT, @EXPORT_OK ] );

use CPAN::Meta::Prereqs '2.132830';
use CPAN::Meta::Requirements 2.121;
use Module::Metadata 1.000023;

sub _check_dep {
	my ($reqs, $module, $dirs) = @_;

	$module eq 'perl' and return ($reqs->accepts_module($module, $]) ? () : sprintf "Your Perl (%s) is not in the range '%s'", $], $reqs->requirements_for_module($module));

	my $metadata = Module::Metadata->new_from_module($module, inc => $dirs);
	return "Module '$module' is not installed" if not defined $metadata;

	my $version = eval { $metadata->version };
	return sprintf 'Installed version (%s) of %s is not in range \'%s\'',
			(defined $version ? $version : 'undef'), $module, $reqs->requirements_for_module($module)
		if not $reqs->accepts_module($module, $version || 0);
	return;
}

sub _check_conflict {
	my ($reqs, $module, $dirs) = @_;
	my $metadata = Module::Metadata->new_from_module($module, inc => $dirs);
	return if not defined $metadata;

	my $version = eval { $metadata->version };
	return sprintf 'Installed version (%s) of %s is in range \'%s\'',
			(defined $version ? $version : 'undef'), $module, $reqs->requirements_for_module($module)
		if $reqs->accepts_module($module, $version);
	return;
}

sub requirements_for {
	my ($meta, $phases, $type) = @_;
	my $prereqs = ref($meta) eq 'CPAN::Meta' ? $meta->effective_prereqs : $meta;
	return $prereqs->merged_requirements(ref($phases) ? $phases : [ $phases ], [ $type ]);
}

sub check_requirements {
	my ($reqs, $type, $dirs) = @_;

	return +{
		map {
			$_ => $type ne 'conflicts'
				? scalar _check_dep($reqs, $_, $dirs)
				: scalar _check_conflict($reqs, $_, $dirs)
		} $reqs->required_modules
	};
}

sub verify_dependencies {
	my ($meta, $phases, $type, $dirs) = @_;
	my $reqs = requirements_for($meta, $phases, $type);
	my $issues = check_requirements($reqs, $type, $dirs);
	return grep { defined } values %{ $issues };
}

1;

#ABSTRACT: Verify requirements in a CPAN::Meta object

__END__