Alien::Build::Plugin::Prefer::GoodVersion(3) User Contributed Perl Documentation Alien::Build::Plugin::Prefer::GoodVersion(3)

Alien::Build::Plugin::Prefer::GoodVersion - Plugin to filter known good versions

version 2.83

use alienfile;
plugin 'Prefer::GoodVersion' => '1.2.3';

This plugin allows you to specify one or more good versions of a library. This doesn't affect a system install at all. This plugin does the opposite of the "Prefer::BadVersion" plugin. You need need a Prefer plugin that filters and sorts files first. You may specify the filter in one of three ways:

Filter any files that match the given version.
use alienfile;
plugin 'Prefer::GoodVersion' => '1.2.3';
Filter all files that match any of the given versions.
use alienfile;
plugin 'Prefer::GoodVersion' => [ '1.2.3', '1.2.4' ];
Filter any files return a true value.
use alienfile;
plugin 'Prefer::GoodVersion' => sub {
  my($file) = @_;
  $file->{version} eq '1.2.3'; # same as the string version above

This plugin can also be used to filter known good versions of a library on just one platform. For example, if you know that version 1.2.3 if good on windows, but the default logic is fine on other platforms:

use alienfile;
plugin 'Prefer::GoodVersion' => '1.2.3' if $^O eq 'MSWin32';

Filter entries that match the filter.

If you are using the string or array mode, then you need an existing Prefer plugin that sets the version number for each file candidate, such as Alien::Build::Plugin::Prefer::SortVersions.

Unless you want to exclude the latest version from a share install, this plugin isn't really that useful. It has no effect on system installs, which may not be obvious at first.

Author: Graham Ollis <>


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This software is copyright (c) 2011-2022 by Graham Ollis.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

2024-06-12 perl v5.38.2