2 files changed, 280 insertions, 0 deletions
diff --git a/lib/App/ArchLinux/PackagerTools/CPAN.pm b/lib/App/ArchLinux/PackagerTools/CPAN.pm
new file mode 100644
index 0000000..175e218
--- /dev/null
+++ b/lib/App/ArchLinux/PackagerTools/CPAN.pm
@@ -0,0 +1,154 @@
+package App::ArchLinux::PackagerTools::CPAN;
+use strictures;
+
+use autodie;
+use CPAN::DistnameInfo;
+use CPANPLUS::Backend;
+use Carp;
+use Function::Parameters;
+use IO::Zlib;
+use Log::Any qw($log);
+use Syntax::Keyword::Try;
+use version;
+
+=head1 NAME
+
+App::ArchLinux::PackagerTools::CPAN - Methods to interact with CPAN
+
+=head1 SYNOPSIS
+
+use App::ArchLinux::PackagerTools::CPAN;
+
+# synopsis...
+
+=head1 DESCRIPTION
+
+# longer description...
+
+=head1 METHODS
+
+=head2 new
+
+ App::ArchLinux::PackagerTools::CPAN->new();
+
+Returns a new instance.
+
+=cut
+
+method new($class: $deps = {}) {
+	$deps->{cpanplus_backend} //= CPANPLUS::Backend->new();
+	return $class->new_no_defaults($deps);
+}
+
+method new_no_defaults($class: $deps = {}) {
+	my $self = {};
+	bless $self, $class;
+	$self->{deps} = $deps;
+	$self->{dist_lc_map} = {};
+	$self->{dists} = {};
+	$self->_build_dist_index();
+	return $self;
+}
+
+=head2 Public Methods
+
+=head3 is_newer_version_available
+
+Return 1 if a newer version of the distribution is available, 0 otherwise.
+
+=cut
+
+method is_newer_version_available($dist_name, $version) {
+	my $dist = $self->get_dist($dist_name);
+	# TODO compare versions rather than not-equal check
+	my $dist_version = version->parse($dist->{version});
+	if ($dist_version > version->parse($version)) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+method _build_dist_index() {
+	$self->{deps}->{cpanplus_backend}->reload_indices();
+	# TODO download pacakges list ourselves instead of using cpanplus for it? We may need cpanplus for other features later so keeping it is probably also fine.
+
+	my $packages_file = "$ENV{HOME}/.cpanplus/02packages.details.txt.gz";
+	my $fh = IO::Zlib->new($packages_file, 'r');
+	my %seen;
+	my $line_number = 0;
+	while (<$fh>) {
+		# skip meta info (first 9 lines)
+		next if $line_number++ < 9;
+
+		#$log->tracef("Parsing line: %s", $_);
+		my ($module_name, $module_version, $file) = split /\s+/;
+
+		next if $seen{$file}++ > 0;
+
+		my $dist = CPAN::DistnameInfo->new($file);
+		if (!defined $dist->{dist}) {
+			$log->debugf("Failed to parse file: %s", $file);
+			next;
+		}
+
+		my $dist_name = $dist->{dist};
+		my $dist_name_lc = lc($dist_name);
+
+		my $dist_version;
+		try {
+			$dist_version = version->parse($dist->{version});
+		} catch {
+			$log->debugf("Skipping dist with invalid version: %s", $@);
+			$log->debugf("Skipped dist is: %s", $dist);
+			next;
+		}
+
+		my $index_dist;
+		my $index_version = version->parse($self->{dists}->{$dist_name}->{version});
+		my $index_name = $self->{dist_lc_map}->{$dist_name_lc};
+		$index_dist = $self->{dists}->{$index_name} if defined $index_name;
+
+		if (!defined($index_dist)
+			|| (defined($index_dist) && $index_name eq $dist_name && $dist_version > $index_version)
+		) {
+			$self->{dist_lc_map}->{$dist_name_lc} = $dist_name;
+			$self->{dists}->{$dist_name} = {
+				dist_name => $dist_name,
+				version => $dist->{version},
+			};
+		} else {
+			if ($dist_name ne $index_name && $dist_version < $index_version) {
+				confess $log->errorf("Key '%s' already exists in lc_map. This requires a manual exception to map correctly.\nExisting: %s\nCurrent: %s", $dist_name_lc, $index_dist, {$dist->%{qw(dist version)}});
+			}
+		}
+	}
+}
+
+method search_dist($name) {
+	$name =~ s/::/-/g;
+	$log->tracef("Searching for CPAN distribution matching '%s'", $name);
+
+	my $index_name = $self->{dist_lc_map}->{lc($name)};
+	if (defined $index_name) {
+		return $self->{dists}->{$index_name};
+	}
+
+	return;
+}
+
+method get_dist($dist_name) {
+	$dist_name =~ s/::/-/g;
+	$log->tracef("Getting CPAN data for distribution '%s'", $dist_name);
+
+	my $index_name = $self->{dist_lc_map}->{lc($dist_name)};
+	if (defined $index_name) {
+		return $self->{dists}->{$index_name};
+	}
+
+	croak $log->errorf("Failed to find distribution with name %s", $dist_name);
+}
+
+1;
+
+__END__
diff --git a/lib/App/ArchLinux/PackagerTools/Pacman.pm b/lib/App/ArchLinux/PackagerTools/Pacman.pm
new file mode 100644
index 0000000..765746e
--- /dev/null
+++ b/lib/App/ArchLinux/PackagerTools/Pacman.pm
@@ -0,0 +1,126 @@
+package App::ArchLinux::PackagerTools::Pacman;
+use strictures;
+
+use autodie;
+use Function::Parameters;
+use Log::Any qw($log);
+
+=head1 NAME
+
+App::ArchLinux::PackagerTools::Pacman - Methods to interact with pacman
+
+=head1 SYNOPSIS
+
+  use App::ArchLinux::PackagerTools::Pacman;
+
+  # synopsis...
+
+=head1 DESCRIPTION
+
+This module allows to query pacman for a list of packages in the repository and
+extract a list of perl distributions that are part of the repository.
+
+
+=head1 METHODS
+
+=head2 Constructors
+
+=head3 new
+
+ App::ArchLinux::PackagerTools::Pacman->new();
+
+Returns a new instance.
+
+=cut
+
+
+method new($class: $deps = {}) {
+	$deps->{cpan} //= App::ArchLinux::PackagerTools::CPAN->new();
+	$deps->{pkgname_cpan_name_map} //= {
+		# pkgname => cpan_name
+		'perl-critic' => 'Perl::Critic',
+		'perl-libintl-perl' => 'libintl-perl',
+	};
+	return $class->new_no_defaults($deps);
+}
+
+method new_no_defaults($class: $deps = {}) {
+	my $self = {};
+	bless $self, $class;
+	$self->{deps} = $deps;
+	return $self;
+}
+
+=head2 Public Methods
+
+=head3 get_packages
+
+Returns an arrayref of package hashes. Each package hash contains at least the
+pkgname and pkgver keys.
+
+=cut
+
+method get_packages() {
+	my @packages;
+	open my $fh, '-|', 'expac -S \'%n %v\'';
+	my %seen;
+	while (<$fh>) {
+		if (m/^(?<pkgname>[^\s]+) (?<pkgver>.*)$/) {
+			push @packages, {%+};
+		}
+	}
+	return \@packages;
+}
+
+method get_perl_packages() {
+	my @packages = grep {$_->{pkgname} =~ /^perl-/} $self->get_packages->@*;
+	$log->debugf("Found %d perl packages", scalar(@packages));
+	return \@packages;
+}
+
+method get_perl_distributions() {
+	my @distributions;
+
+	for my $package ($self->get_perl_packages()->@*) {
+		my $cleaned_name = $package->{pkgname} =~ s/^perl-//r;
+		my $dist;
+		if (defined $self->{deps}->{pkgname_cpan_name_map}->{$package->{pkgname}}) {
+			$dist = $self->{deps}->{cpan}->get_dist($self->{deps}->{pkgname_cpan_name_map}->{$package->{pkgname}});
+		} else {
+			$dist = $self->{deps}->{cpan}->search_dist($cleaned_name);
+		}
+		push @distributions, $dist if defined $dist;
+		$log->warningf("Failed to find distribution for package '%s'", $package) if !defined $dist;
+	}
+	return \@distributions;
+}
+
+method get_package_version($pkgname) {
+	# TODO do not fork expac for each package here! works for now, but it's sloooow
+	my $version = `expac -S -1 '%v' -- '$pkgname'`;
+	chomp $version;
+	return $version;
+}
+
+method get_perl_pkgname($dist_name) {
+	my $pkgname = lc($dist_name);
+	$pkgname =~ s/::/-/g;
+	$pkgname = "perl-$pkgname";
+	return $pkgname;
+}
+
+method get_perl_distribution_version($dist_name) {
+	my $pkgname = $self->get_perl_pkgname($dist_name);
+	my $version = $self->get_package_version($pkgname);
+	# remove pkgrel
+	$version =~ s/-\d+(\.\d+)?$//;
+	# remove epoch
+	$version =~ s/^\d+://;
+
+	$log->tracef("Found version '%s' for package '%s'", $version, $pkgname);
+	return $version;
+}
+
+1;
+
+__END__