inc::latest(3pm)      User Contributed Perl Documentation     inc::latest(3pm)

NAME
       inc::latest - use modules bundled in inc/ if they are newer than
       installed ones

SYNOPSIS
         # in Build.PL
         use inc::latest 'Module::Build';

DESCRIPTION
       The "inc::latest" module helps bootstrap configure-time dependencies
       for CPAN distributions.  These dependencies get bundled into the "inc"
       directory within a distribution and are used by Build.PL (or
       Makefile.PL).

       Arguments to "inc::latest" are module names that are checked against
       both the current @INC array and against specially-named directories in
       "inc".  If the bundled version is newer than the installed one (or the
       module isn't installed, then, the bundled directory is added to the
       start of <@INC> and the module is loaded from there.

       There are actually two variations of "inc::latest" -- one for authors
       and one for the "inc" directory.  For distribution authors, the
       "inc::latest" installed in the system will record modules loaded via
       "inc::latest" and can be used to create the bundled files in "inc",
       including writing the second variation as "inc/latest.pm".

       This second "inc::latest" is the one that is loaded in a distribution
       being installed (e.g. from Build.PL).  This bundled "inc::latest" is
       the one that determines which module to load.

   Special notes on bundling
       The "inc::latest" module creates bundled directories based on the
       packlist file of an installed distribution.  Even though "inc::latest"
       takes module name arguments, it is better to think of it as bundling
       and making available entire distributions.  When a module is loaded
       through "inc::latest", it looks in all bundled distributions in "inc/"
       for a newer module than can be found in the existing @INC array.

       Thus, the module-name provided should usually be the "top-level" module
       name of a distribution, though this is not strictly required.  For
       example, Module::Build has a number of heuristics to map module names
       to packlists, allowing users to do things like this:

         use inc::latest 'Devel::AssertOS::Unix';

       even though Devel::AssertOS::Unix is contained within the Devel-CheckOS
       distribution.

       At the current time, packlists are required.  Thus, bundling dual-core
       modules may require a 'forced install' over versions in the latest
       version of perl in order to create the necessary packlist for bundling.

USAGE
       When calling "use", the bundled "inc::latest" takes a single module
       name and optional arguments to pass to that module's own import method.

         use 'inc::latest' 'Foo::Bar' qw/foo bar baz/;

   Author-mode
       You are in author-mode inc::latest if any of the Author-mode methods
       are available.  For example:

         if ( inc::latest->can('write') ) {
           inc::latest->write('inc');
         }

       loaded_modules()
             my @list = inc::latest->loaded_modules;

           This takes no arguments and always returns a list of module names
           requested for loading via "use inc::latest 'MODULE'", regardless of
           whether the load was successful or not.

       write()
             inc::latest->write( 'inc' );

           This writes the bundled version of inc::latest to the directory
           name given as an argument.  It almost all cases, it should be
           '"inc"'.

       bundle_module()
             for my $mod ( inc::latest->loaded_modules ) {
               inc::latest->bundle_module($mod, $dir);
             }

           If $mod corresponds to a packlist, then this function creates a
           specially-named directory in $dir and copies all .pm files from the
           modlist to the new directory (which almost always should just be
           'inc').  For example, if Foo::Bar is the name of the module, and
           $dir is 'inc', then the directory would be 'inc/inc_Foo-Bar' and
           contain files like this:

             inc/inc_Foo-Bar/Foo/Bar.pm

           Currently, $mod must have a packlist.  If this is not the case
           (e.g. for a dual-core module), then the bundling will fail.  You
           may be able to create a packlist by forced installing the module on
           top of the version that came with core Perl.

   As bundled in inc/
       All methods are private.  Only the "import" method is public.

AUTHOR
       Eric Wilhelm <ewilhelm@cpan.org>, David Golden <dagolden@cpan.org>

COPYRIGHT
       Copyright (c) 2009 by Eric Wilhelm and David Golden

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

SEE ALSO
       Module::Build

perl v5.20.2                      2016-07-24                  inc::latest(3pm)

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