Alien::Build::Plugin(3)

NAME
Alien::Build::Plugin - Plugin base class for Alien::Build

VERSION
version 2.19

SYNOPSIS
Create your plugin:

 package Alien::Build::Plugin::Type::MyPlugin;

 use Alien::Build::Plugin;
 use Carp ();

 has prop1 => 'default value';
 has prop2 => sub { 'default value' };
 has prop3 => sub { Carp::croak 'prop3 is a required property' };

 sub init
 {
   my($self, $meta) = @_;

   my $prop1 = $self->prop1;
   my $prop2 = $self->prop2;
   my $prop3 = $self->prop3;

   $meta->register_hook(sub {
     build => [ '%{make}', '%{make} install' ],
   });
 }

From your alienfile

 use alienfile;
 plugin 'Type::MyPlugin' => (
   prop2 => 'different value',
   prop3 => 'need to provide since it is required',
 );

DESCRIPTION
This document describes the Alien::Build plugin base class. For details on how to write a plugin, see Alien::Build::Manual::PluginAuthor.

Listed are some common types of plugins:

Alien::Build::Plugin::Build
    Tools for building.

Alien::Build::Plugin::Core
    Tools already included.

Alien::Build::Plugin::Download
    Methods for retrieving from the internet.

Alien::Build::Plugin::Decode
    Normally use Download plugins which will pick the correct Decode plugins.

Alien::Build::Plugin::Extract
    Extract from archives that have been downloaded.

Alien::Build::Plugin::Fetch
    Normally use Download plugins which will pick the correct Fetch plugins.

Alien::Build::Plugin::Prefer
    Normally use Download plugins which will pick the correct Prefer plugins.

Alien::Build::Plugin::Probe
    Look for packages already installed on the system.

CONSTRUCTOR

  new
 my $plugin = Alien::Build::Plugin->new(%props);

METHODS

  init
 $plugin->init($ab_class->meta); # $ab is an Alien::Build class name

You provide the implementation for this. The intent is to register hooks and set meta properties on the Alien::Build class.

  subplugin
DEPRECATED: Maybe removed, but not before 1 October 2018.

 my $plugin2 = $plugin1->subplugin($plugin_name, %args);

Finds the given plugin and loads it (unless already loaded) and creats a new instance and returns it. Most useful from a Negotiate plugin, like this:

 sub init
 {
   my($self, $meta) = @_;
   $self->subplugin(
     'Foo::Bar',  # loads Alien::Build::Plugin::Foo::Bar,
                  # or throw exception
     foo => 1,    # these key/value pairs passsed into new
     bar => 2,    # for the plugin instance.
   )->init($meta);
 }

  has
 has $prop_name;
 has $prop_name => $default;

Specifies a property of the plugin. You may provide a default value as either a string scalar, or a code reference. The code reference will be called to compute the default value, and if you want the default to be a list or hash reference, this is how you want to do it:

 has foo => sub { [1,2,3] };

  meta
 my $meta = $plugin->meta;

Returns the plugin meta object.

SEE ALSO
Alien::Build, alienfile, Alien::Build::Manual::PluginAuthor

AUTHOR
Author: Graham Ollis <plicease@cpan.org>

Contributors:

Diab Jerius (DJERIUS)

Roy Storey (KIWIROY)

Ilya Pavlov

David Mertens (run4flat)

Mark Nunberg (mordy, mnunberg)

Christian Walde (Mithaldu)

Brian Wightman (MidLifeXis)

Zaki Mughal (zmughal)

mohawk (mohawk2, ETJ)

Vikas N Kumar (vikasnkumar)

Flavio Poletti (polettix)

Salvador Fandiño (salva)

Gianni Ceccarelli (dakkar)

Pavel Shaydo (zwon, trinitum)

Kang-min Liu (劉康民, gugod)

Nicholas Shipp (nshp)

Juan Julián Merelo Guervós (JJ)

Joel Berger (JBERGER)

Petr Pisar (ppisar)

Lance Wicks (LANCEW)

Ahmad Fatoum (a3f, ATHREEF)

José Joaquín Atria (JJATRIA)

Duke Leto (LETO)

Shoichi Kaji (SKAJI)

Shawn Laffan (SLAFFAN)

Paul Evans (leonerd, PEVANS)

COPYRIGHT AND LICENSE
This software is copyright (c) 2011-2020 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.