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# ABSTRACT: Write records to an 02packages.details.txt file
package Pinto::IndexWriter;
use Moose;
use MooseX::StrictConstructor;
use MooseX::MarkAsMethods ( autoclean => 1 );
use IO::Zlib;
use Module::CoreList;
use Path::Class qw(file);
use HTTP::Date qw(time2str);
use Pinto::Types qw(File);
use Pinto::Util qw(debug throw);
#------------------------------------------------------------------------------
our $VERSION = '0.14'; # VERSION
#------------------------------------------------------------------------------
has stack => (
is => 'ro',
isa => 'Pinto::Schema::Result::Stack',
required => 1,
);
has index_file => (
is => 'ro',
isa => File,
default => sub { $_[0]->stack->modules_dir->file('02packages.details.txt.gz') },
lazy => 1,
);
#------------------------------------------------------------------------------
sub write_index {
my ($self) = @_;
my $index_file = $self->index_file;
my $stack = $self->stack;
debug("Writing index for stack $stack at $index_file");
my $handle = IO::Zlib->new( $index_file->stringify, 'wb' )
or throw "Cannot open $index_file: $!";
my @records = $self->_get_index_records($stack);
my $count = scalar @records;
debug("Index for stack $stack has $count records");
$self->_write_header( $handle, $index_file, $count );
$self->_write_records( $handle, @records );
close $handle;
return $self;
}
#------------------------------------------------------------------------------
sub _write_header {
my ( $self, $fh, $filename, $line_count ) = @_;
my $base = $filename->basename;
my $uri = 'file://' . $filename->absolute->as_foreign('Unix');
my $writer = ref $self;
my $version = $self->VERSION || 'UNKNOWN';
my $date = time2str(time);
print {$fh} <<"END_PACKAGE_HEADER";
File: $base
URL: $uri
Description: Package names found in directory \$CPAN/authors/id/
Columns: package name, version, path
Intended-For: Automated fetch routines, namespace documentation.
Written-By: $writer version $version
Line-Count: $line_count
Last-Updated: $date
END_PACKAGE_HEADER
return $self;
}
#------------------------------------------------------------------------------
sub _write_records {
my ( $self, $fh, @records ) = @_;
for my $record (@records) {
my ( $name, $version, $author, $archive ) = @{$record};
my $path = join '/', substr( $author, 0, 1 ), substr( $author, 0, 2 ), $author, $archive;
my $width = 38 - length $version;
$width = length $name if $width < length $name;
printf {$fh} "%-${width}s %s %s\n", $name, $version, $path;
}
return $self;
}
#------------------------------------------------------------------------------
sub _get_index_records {
my ( $self, $stack ) = @_;
# The index is rewritten after almost every action, so we want
# this to be as fast as possible (especially during an Add or
# Remove action). Therefore, we use a cursor to get raw data and
# skip all the DBIC extras.
# Yes, slurping all the records at once consumes a lot of memory,
# but I want them to be sorted the way perl sorts them, not the
# way sqlite sorts them. That way, the index file looks more
# like one produced by PAUSE. Also, this is about twice as fast
# as using an iterator to read each record lazily.
my @joins = qw(package distribution);
my @selects = qw(package.name package.version distribution.author distribution.archive);
my $attrs = { join => \@joins, select => \@selects };
my $rs = $stack->head->search_related( 'registrations', {}, $attrs );
my %stack_records = map { ($_->[0] => $_) } $rs->cursor->all;
# Now, we merge the stuff from the stack with core modules. If
# the stack has a newer version of a core module (dual-life) then
# it should be the one that appears in the index. Then finally
# we sort them.
my %fake_records = $self->_get_fake_records;
my %merged_records = (%fake_records, %stack_records);
return map { $merged_records{$_} }
sort {lc $a cmp lc $b}
keys %merged_records;
}
#------------------------------------------------------------------------------
sub _get_fake_records {
my ($self) = @_;
# We generate artificial records for all the (non-deprecated) core modules
# that are in the target perl. That way, the index appears to have perl
# itself (just like the real CPAN) and installers can handle requests to
# install a core module.
my $tpv = $self->stack->target_perl_version;
my $tpv_normal = $tpv->normal; $tpv_normal =~ s/^v//;
my @fake = ("FAKE", "perl-$tpv_normal.tar.gz");
my $core_versions = $Module::CoreList::version{$tpv->numify + 0};
my $deprecated_modules = $Module::CoreList::deprecated{$tpv->numify + 0};
my $fake_records = {};
for my $module (keys %{ $core_versions }) {
next if $deprecated_modules && exists $deprecated_modules->{ $module };
$fake_records->{$module} = [$module, $core_versions->{$module} || 0, @fake];
}
return %{ $fake_records };
}
#------------------------------------------------------------------------------
__PACKAGE__->meta->make_immutable;
#------------------------------------------------------------------------------
1;
__END__
=pod
=encoding UTF-8
=for :stopwords Jeffrey Ryan Thalhammer
=head1 NAME
Pinto::IndexWriter - Write records to an 02packages.details.txt file
=head1 VERSION
version 0.14
=head1 AUTHOR
Jeffrey Ryan Thalhammer <jeff@stratopan.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Jeffrey Ryan Thalhammer.
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
|
