1CPAN::Distroprefs(3)  User Contributed Perl Documentation CPAN::Distroprefs(3)
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NAME

6       CPAN::Distroprefs -- read and match distroprefs
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SYNOPSIS

9           use CPAN::Distroprefs;
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11           my %info = (... distribution/environment info ...);
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13           my $finder = CPAN::Distroprefs->find($prefs_dir, \%ext_map);
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15           while (my $result = $finder->next) {
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17               die $result->as_string if $result->is_fatal;
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19               warn($result->as_string), next if $result->is_warning;
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21               for my $pref (@{ $result->prefs }) {
22                   if ($pref->matches(\%info)) {
23                       return $pref;
24                   }
25               }
26           }
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DESCRIPTION

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

33           my $finder = CPAN::Distroprefs->find($dir, \%ext_map);
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35           while (my $result = $finder->next) { ... }
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37       Build an iterator which finds distroprefs files in the tree below the
38       given directory. Within the tree directories matching "m/^[._]/" are
39       pruned.
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41       %ext_map is a hashref whose keys are file extensions and whose values
42       are modules used to load matching files:
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44           {
45               'yml' => 'YAML::Syck',
46               'dd'  => 'Data::Dumper',
47               ...
48           }
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50       Each time "$finder->next" is called, the iterator returns one of two
51       possible values:
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53       •   a CPAN::Distroprefs::Result object
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55       •   "undef", indicating that no prefs files remain to be found
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RESULTS

58       "find()" returns CPAN::Distroprefs::Result objects to indicate success
59       or failure when reading a prefs file.
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61   Common
62       All results share some common attributes:
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64       type
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66       "success", "warning", or "fatal"
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68       file
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70       the file from which these prefs were read, or to which this error
71       refers (relative filename)
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73       ext
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75       the file's extension, which determines how to load it
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77       dir
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79       the directory the file was read from
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81       abs
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83       the absolute path to the file
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85   Errors
86       Error results (warning and fatal) contain:
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88       msg
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90       the error message (usually either $! or a YAML error)
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92   Successes
93       Success results contain:
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95       prefs
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97       an arrayref of CPAN::Distroprefs::Pref objects
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PREFS

100       CPAN::Distroprefs::Pref objects represent individual distroprefs
101       documents.  They are constructed automatically as part of "success"
102       results from "find()".
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104       data
105
106       the pref information as a hashref, suitable for e.g. passing to Kwalify
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108       match_attributes
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110       returns a list of the valid match attributes (see the Distroprefs
111       section in CPAN)
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113       currently: "env perl perlconfig distribution module"
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115       has_any_match
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117       true if this pref has a 'match' attribute at all
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119       has_valid_subkeys
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121       true if this pref has a 'match' attribute and at least one valid match
122       attribute
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124       matches
125
126         if ($pref->matches(\%arg)) { ... }
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128       true if this pref matches the passed-in hashref, which must have a
129       value for each of the "match_attributes" (above)
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LICENSE

132       This program is free software; you can redistribute it and/or modify it
133       under the same terms as Perl itself.
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137perl v5.34.0                      2021-07-22              CPAN::Distroprefs(3)