NAME

POE::Component::SmokeBox::Dists - Search for CPAN distributions by cpanid or distribution name

SYNOPSIS

use strict;
use warnings;

use POE;
use POE::Component::SmokeBox::Dists;

my $search = '^BINGOS$';

POE::Session->create(
  package_states => [
	'main' => [qw(_start _results)],
  ],
);

$poe_kernel->run();
exit 0;

sub _start {
  POE::Component::SmokeBox::Dists->author(
	event => '_results',
	search => $search,
  );
  return;
}

sub _results {
  my $ref = $_[ARG0];
  
  return if $ref->{error}; # Oh dear there was an error

  print $_, "\n" for @{ $ref->{dists} };

  return;
}

DESCRIPTION

POE::Component::SmokeBox::Dists is a POE component that provides non-blocking CPAN distribution searches. It is a wrapper around File::Fetch for 02packages.details.txt.gz file retrieval, IO::Zlib for extraction and Parse::CPAN::Packages for parsing the packages data.

Given either author ( ie. CPAN ID ) or distribution search criteria, expressed as a regular expression, it will return to a requesting session all the CPAN distributions that match that pattern.

The component will retrieve the 02packages.details.txt.gz file to the .smokebox directory. If that file already exists, a newer version will only be retrieved if the file is older than 6 hours.

The 02packages.details.txt.gz is extracted and a Parse::CPAN::Packages object built in order to run the search criteria. This process can take a little bit of time.

CONSTRUCTORS

There are two constructors:

author

Initiates an author search. Takes a number of parameters:

'event', the name of the event to return results to, mandatory;
'search', a regex pattern to match CPAN IDs against, mandatory;
'session', specify an alternative session to send results to;

distro

Initiates a distribution search. Takes a number of parameters:

'event', the name of the event to return results to, mandatory;
'search', a regex pattern to match distributions against, mandatory;
'session', specify an alternative session to send results to;

In both constructors, session is only required if the component is not spawned from within an existing POE::Session or you wish the results event to be sent to an alternative existing POE::Session.

OUTPUT EVENT

Once the component has finished, retrieving, extracting and processing an event will be sent.

ARG0 will be a hashref, with the following data:

'dists', an arrayref consisting of prefixed distributions;
'error', only present if something went wrong with any of the stages;

ENVIRONMENT

The component uses the .smokebox directory to stash the 02packages.details.txt.gz file.

This is usually located in the current user's home directory. Setting the environment variable PERL5_SMOKEBOX_DIR will effect where the .smokebox directory is located.

AUTHOR

Chris BinGOs Williams <chris@bingosnet.co.uk>

LICENSE

Copyright (C) Chris Williams

This module may be used, modified, and distributed under the same terms as Perl itself. Please see the license that came with your Perl distribution for details.

SEE ALSO

Parse::CPAN::Packages