NAME

alienfile - Specification for defining an external dependency for CPAN

VERSION

version 2.74

SYNOPSIS

Do-it-yourself approach:

use alienfile;

probe [ 'pkg-config --exists libarchive' ];

share {

  start_url 'http://libarchive.org/downloads/libarchive-3.2.2.tar.gz';

  # the first one which succeeds will be used
  download [ 'wget %{.meta.start_url}' ];
  download [ 'curl -o %{.meta.start_url}' ];

  extract [ 'tar xf %{.install.download}' ];

  build [
    # Note: will not work on Windows, better to use Build::Autoconf plugin
    # if you need windows support
    './configure --prefix=%{.install.prefix} --disable-shared',
    '%{make}',
    '%{make} install',
  ];
}

gather [
  [ 'pkg-config', '--modversion', 'libarchive', \'%{.runtime.version}' ],
  [ 'pkg-config', '--cflags',     'libarchive', \'%{.runtime.cflags}'  ],
  [ 'pkg-config', '--libs',       'libarchive', \'%{.runtime.libs}'    ],
];

With plugins (better):

use alienfile;

plugin 'PkgConfig' => 'libarchive';

share {
  start_url 'http://libarchive.org/downloads/';
  plugin Download => (
    filter => qr/^libarchive-.*\.tar\.gz$/,
    version => qr/([0-9\.]+)/,
  );
  plugin Extract => 'tar.gz';
  plugin 'Build::Autoconf';
  plugin 'Gather::IsolateDynamic';
  build [
    '%{configure}',
    '%{make}',
    '%{make} install',
  ];
};

DESCRIPTION

An alienfile is a recipe used by Alien::Build to, probe for system libraries or download from the internet, and build source for those libraries. This document acts as reference for the alienfile system, but if you are starting out writing your own Alien you should read Alien::Build::Manual::AlienAuthor, which will teach you how to write your own complete Alien using alienfile + Alien::Build + ExtUtils::MakeMaker. Special attention should be taken to the section "a note about dynamic vs. static libraries".

DIRECTIVES

requires

"any" requirement (either share or system):

requires $module;
requires $module => $version;

configure time requirement:

configure {
  requires $module;
  requires $module => $version;
};

system requirement:

sys {
  requires $module;
  requires $module => $version;
};

share requirement:

share {
  requires $module;
  requires $module => $version;
};

specifies a requirement. Alien::Build takes advantage of dynamic requirements, so only modules that are needed for the specific type of install need to be loaded. Here are the different types of requirements:

configure: Configure requirements should already be installed before the alienfile is loaded.
any: "Any" requirements are those that are needed either for the probe stage, or in either the system or share installs.
share: Share requirements are those modules needed when downloading and building from source.
system: System requirements are those modules needed when the system provides the library or tool.

plugin

plugin $name => (%args);
plugin $name => $arg;

Load the given plugin. If you prefix the plugin name with an = sign, then it will be assumed to be a fully qualified path name. Otherwise the plugin will be assumed to live in the Alien::Build::Plugin namespace. If there is an appropriate negotiate plugin, that one will be loaded. Examples:

# Loads Alien::Build::Plugin::Fetch::Negotiate
# which will pick the best Alien::Build::Plugin::Fetch
# plugin based on the URL, and system configuration
plugin 'Fetch' => 'http://ftp.gnu.org/gnu/gcc';

# loads the plugin with the badly named class!
plugin '=Badly::Named::Plugin::Not::In::Alien::Build::Namespace';

# explicitly loads Alien::Build::Plugin::Prefer::SortVersions
plugin 'Prefer::SortVersions' => (
  filter => qr/^gcc-.*\.tar\.gz$/,
  version => qr/([0-9\.]+)/,
);

probe

probe \&code;
probe \@commandlist;

Instructions for the probe stage. May be either a code reference, or a command list. Multiple probes and probe plugins can be given. These will be used in sequence, stopping at the first that detects a system installation. Alien::Build will use a share install if no system installation is detected by the probes.

configure

configure {
  ...
};

Configure block. The only directive allowed in a configure block is requires.

sys

sys {
  ...
};

System block. Allowed directives are: requires and gather.

share {
  ...
};

System block. Allowed directives are: download, fetch, decode, prefer, extract, build, gather.

start_url

share {
  start_url $url;
};

Set the start URL for download. This should be the URL to an index page, or the actual tarball of the source.

digest

[experimental]

share {
  digest $algorithm, $digest;
};

Check fetched and downloaded files against the given algorithm and digest. Typically you will want to use SHA256 as the algorithm.

download

share {
  download \&code;
  download \@commandlist;
};

Instructions for the download stage. May be either a code reference, or a command list.

fetch

share {
  fetch \&code;
  fetch \@commandlist;
};

Instructions for the fetch stage. May be either a code reference, or a command list.

decode

share {
  decode \&code;
  decode \@commandlist;
};

Instructions for the decode stage. May be either a code reference, or a command list.

prefer

share {
  prefer \&code;
  prefer \@commandlist;
};

Instructions for the prefer stage. May be either a code reference, or a command list.

extract

share {
  extract \&code;
  extract \@commandlist;
};

Instructions for the extract stage. May be either a code reference, or a command list.

patch

share {
  patch \&code;
  patch \@commandlist;
};

Instructions for the patch stage. May be either a code reference, or a command list.

patch_ffi

share {
  patch_ffi \&code;
  patch_ffi \@commandlist;
};

[DEPRECATED]

Instructions for the patch_ffi stage. May be either a code reference, or a command list.

build

share {
  build \&code;
  build \@commandlist;
};

Instructions for the build stage. May be either a code reference, or a command list.

build_ffi

share {
  build \&code;
  build \@commandlist;
};

[DEPRECATED]

Instructions for the build FFI stage. Builds shared libraries instead of static. This is optional, and is only necessary if a fresh and separate build needs to be done for FFI.

gather

gather \&code;
gather \@commandlist;

share {
  gather \&code;
  gather \@commandlist;
};

sys {
  gather \&code;
  gather \@commandlist;
};

Instructions for the gather stage. May be either a code reference, or a command list. In the root block of the alienfile it will trigger in both share and system build. In the share or sys block it will only trigger in the corresponding build.

gather_ffi

share {
  gather_ffi \&code;
  gather_ffi \@commandlist;
}

[DEPRECATED]

Gather specific to build_ffi. Not usually necessary.

ffi

share {
  ffi {
    patch \&code;
    patch \@commandlist;
    build \&code;
    build \@commandlist;
    gather \&code;
    gather \@commandlist;
  }
}

Specify patch, build or gather stages related to FFI.

meta_prop

my $hash = meta_prop;

Get the meta_prop hash reference.

log

log($message);

Prints the given log to stdout.

test

share {
  test \&code;
  test \@commandlist;
};
sys {
  test \&code;
  test \@commandlist;
};

Run the tests

before

before $stage => \&code;

Execute the given code before the given stage. Stage should be one of probe, download, fetch, decode, prefer, extract, patch, build, test, and gather.

The before directive is only legal in the same blocks as the stage would normally be legal in. For example, you can't do this:

use alienfile;

sys {
  before 'build' => sub {
    ...
  };
};

Because a build wouldn't be legal inside a sys block.

after

after $stage => \&code;

Execute the given code after the given stage. Stage should be one of probe, download, fetch, decode, prefer, extract, patch, build, test, and gather.

The after directive is only legal in the same blocks as the stage would normally be legal in. For example, you can't do this:

use alienfile;

sys {
  after 'build' => sub {
    ...
  };
};

Because a build wouldn't be legal inside a sys block.

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 Písař (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)

Håkon Hægland (hakonhagland, HAKONH)

nick nauwelaerts (INPHOBIA)

Florian Weimer

COPYRIGHT AND LICENSE

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

To install Alien::Build, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Alien::Build

CPAN shell

perl -MCPAN -e shell
install Alien::Build

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)

NAME

VERSION

SYNOPSIS

DESCRIPTION

DIRECTIVES

requires

plugin

probe

configure

sys

share

start_url

digest

download

fetch

decode

prefer

extract

patch

patch_ffi

build

build_ffi

gather

gather_ffi

ffi

meta_prop

meta

log

test

before

after

SEE ALSO

AUTHOR

COPYRIGHT AND LICENSE

Module Install Instructions