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+=head1 NAME
+
+CPAN::Kwalify - Interface between CPAN.pm and Kwalify.pm
+
+=head1 SYNOPSIS
+
+ use CPAN::Kwalify;
+ validate($schema_name, $data, $file, $doc);
+
+=head1 DESCRIPTION
+
+=over
+
+=item _validate($schema_name, $data, $file, $doc)
+
+$schema_name is the name of a supported schema. Currently only
+C<distroprefs> is supported. $data is the data to be validated. $file
+is the absolute path to the file the data are coming from. $doc is the
+index of the document within $doc that is to be validated. The last
+two arguments are only there for better error reporting.
+
+Relies on being called from within CPAN.pm.
+
+Dies if something fails. Does not return anything useful.
+
+=item yaml($schema_name)
+
+Returns the YAML text of that schema. Dies if something fails.
+
+=back
+
+=head1 AUTHOR
+
+Andreas Koenig C<< <andk@cpan.org> >>
+
+=head1 LICENSE
+
+This program is free software; you can redistribute it and/or
+modify it under the same terms as Perl itself.
+
+See L<http://www.perl.com/perl/misc/Artistic.html>
+
+
+
+=cut
+
+
+use strict;
+
+package CPAN::Kwalify;
+use vars qw($VERSION $VAR1);
+$VERSION = "5.50";
+
+use File::Spec ();
+
+my %vcache = ();
+
+my $schema_loaded = {};
+
+sub _validate {
+ my($schema_name,$data,$abs,$y) = @_;
+ my $yaml_module = CPAN->_yaml_module;
+ if (
+ $CPAN::META->has_inst($yaml_module)
+ &&
+ $CPAN::META->has_inst("Kwalify")
+ ) {
+ my $load = UNIVERSAL::can($yaml_module,"Load");
+ unless ($schema_loaded->{$schema_name}) {
+ eval {
+ my $schema_yaml = yaml($schema_name);
+ $schema_loaded->{$schema_name} = $load->($schema_yaml);
+ };
+ if ($@) {
+ # we know that YAML.pm 0.62 cannot parse the schema,
+ # so we try a fallback
+ my $content = do {
+ my $path = __FILE__;
+ $path =~ s/\.pm$//;
+ $path = File::Spec->catfile($path, "$schema_name.dd");
+ local *FH;
+ open FH, $path or die "Could not open '$path': $!";
+ local $/;
+ <FH>;
+ };
+ $VAR1 = undef;
+ eval $content;
+ if (my $err = $@) {
+ die "parsing of '$schema_name.dd' failed: $err";
+ }
+ $schema_loaded->{$schema_name} = $VAR1;
+ }
+ }
+ }
+ if (my $schema = $schema_loaded->{$schema_name}) {
+ my $mtime = (stat $abs)[9];
+ for my $k (keys %{$vcache{$abs}}) {
+ delete $vcache{$abs}{$k} unless $k eq $mtime;
+ }
+ return if $vcache{$abs}{$mtime}{$y}++;
+ eval { Kwalify::validate($schema, $data) };
+ if (my $err = $@) {
+ my $info = {}; yaml($schema_name, info => $info);
+ die "validation of distropref '$abs'[$y] against schema '$info->{path}' failed: $err";
+ }
+ }
+}
+
+sub _clear_cache {
+ %vcache = ();
+}
+
+sub yaml {
+ my($schema_name, %opt) = @_;
+ my $content = do {
+ my $path = __FILE__;
+ $path =~ s/\.pm$//;
+ $path = File::Spec->catfile($path, "$schema_name.yml");
+ if ($opt{info}) {
+ $opt{info}{path} = $path;
+ }
+ local *FH;
+ open FH, $path or die "Could not open '$path': $!";
+ local $/;
+ <FH>;
+ };
+ return $content;
+}
+
+1;
+
+# Local Variables:
+# mode: cperl
+# cperl-indent-level: 4
+# End:
+