CPAN::Distroprefs

CPAN::Distroprefs(3) User Contributed Perl Documentation CPAN::Distroprefs(3)



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 direc-
       tory.

       %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:

       * a CPAN::Distroprefs::Result object
       * "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 docu-
       ments.  They are constructed automatically as part of "success"
       results from "find()".

       data

       the pref information as a hashref, suitable for e.g. passing to Kwal-
       ify

       match_attributes

       returns a list of the valid match attributes (see the Distroprefs sec-
       tion 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 v5.8.8			  2009-02-28		 CPAN::Distroprefs(3)