CPAN::Distroprefs(3pm)					 Perl Programmers Reference Guide				    CPAN::Distroprefs(3pm)

NAME

       CPAN::Distroprefs -- read and match distroprefs

SYNOPSIS

	   use CPAN::Distroprefs;

	   my %info = (... distribution/environment info ...);

	   my $finder = CPAN::Distroprefs->find($prefs_dir, \%ext_map);

	   while (my $result = $finder->next) {

	       die $result->as_string if $result->is_fatal;

	       warn($result->as_string), next if $result->is_warning;

	       for my $pref (@{ $result->prefs }) {
		   if ($pref->matches(\%info)) {
		       return $pref;
		   }
	       }
	   }

DESCRIPTION

       This module encapsulates reading Distroprefs and matching them against CPAN distributions.

INTERFACE

	   my $finder = CPAN::Distroprefs->find($dir, \%ext_map);

	   while (my $result = $finder->next) { ... }

       Build an iterator which finds distroprefs files in the given directory.

       %ext_map is a hashref whose keys are file extensions and whose values are modules used to load matching files:

	   {
	       'yml' => 'YAML::Syck',
	       'dd'  => 'Data::Dumper',
	       ...
	   }

       Each time "$finder->next" is called, the iterator returns one of two possible values:

       o   a CPAN::Distroprefs::Result object

       o   "undef", indicating that no prefs files remain to be found

RESULTS

       "find()" returns CPAN::Distroprefs::Result objects to indicate success or failure when reading a prefs file.

   Common
       All results share some common attributes:

       type

       "success", "warning", or "fatal"

       file

       the file from which these prefs were read, or to which this error refers (relative filename)

       ext

       the file's extension, which determines how to load it

       dir

       the directory the file was read from

       abs

       the absolute path to the file

   Errors
       Error results (warning and fatal) contain:

       msg

       the error message (usually either $! or a YAML error)

   Successes
       Success results contain:

       prefs

       an arrayref of CPAN::Distroprefs::Pref objects

PREFS

       CPAN::Distroprefs::Pref objects represent individual distroprefs documents.  They are constructed automatically as part of "success"
       results from "find()".

       data

       the pref information as a hashref, suitable for e.g. passing to Kwalify

       match_attributes

       returns a list of the valid match attributes (see the Distroprefs section in CPAN)

       currently: "env perl perlconfig distribution module"

       has_any_match

       true if this pref has a 'match' attribute at all

       has_valid_subkeys

       true if this pref has a 'match' attribute and at least one valid match attribute

       matches

	 if ($pref->matches(\%arg)) { ... }

       true if this pref matches the passed-in hashref, which must have a value for each of the "match_attributes" (above)

LICENSE

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.1							    2010-04-26						    CPAN::Distroprefs(3pm)