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

VERSION
    version 0.500

SYNOPSIS
      # in Makefile.PL or Build.PL
      use inc::latest 'Some::Configure::Prereq';

DESCRIPTION
    WARNING -- THIS IS AN EXPERIMENTAL MODULE. It was originally bundled (as
    an experiment) with Module::Build and has been split out for more
    general use.

    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 Makefile.PL or Build.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 Makefile.PL or 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.
    "inc::latest" has a number of heuristics to discover module names,
    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.

  Managing dependency chains
    Before bundling a distribution you must ensure that all prerequisites
    are also bundled and load in the correct order.

    For example, if you need "Wibble", but "Wibble" depends on "Wobble", and
    you have bundled "Module::Build", your Build.PL might look like this:

      use inc::latest 'Wobble';
      use inc::latest 'Wibble';
      use inc::latest 'Module::Build';

      Module::Build->new(
        module_name => 'Foo::Bar',
        license => 'perl',
      )->create_build_script;

    Authors are strongly suggested to limit the bundling of additional
    dependencies if at all possible and to carefully test their distribution
    tarballs before uploading to CPAN.

USAGE
  As bundled in inc/
    Using "Author-mode", a special stub module will be created in your
    distribute directory as inc/latest.pm. In your Makefile.PL or Build.PL,
    you can then load "inc::latest" to load bundled modules.

    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/;

    The implementation is private. Only the "import" method is public.

  Author-mode
    When you have inc::latest installed from CPAN, then you are in
    author-mode if any of the Author-mode methods are available. For
    example:

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

    Using author-mode, you can create the stub inc/latest.pm and bundle
    modules into 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.

SUPPORT
  Bugs / Feature Requests
    Please report any bugs or feature requests through the issue tracker at
    <https://github.com/dagolden/inc-latest/issues>. You will be notified
    automatically of any progress on your issue.

  Source Code
    This is open source software. The code repository is available for
    public review and contribution under the terms of the license.

    <https://github.com/dagolden/inc-latest>

      git clone https://github.com/dagolden/inc-latest.git

AUTHORS
    *   David Golden <dagolden@cpan.org>

    *   Eric Wilhelm <ewilhelm@cpan.org>

COPYRIGHT AND LICENSE
    This software is Copyright (c) 2009 by David Golden.

    This is free software, licensed under:

      The Apache License, Version 2.0, January 2004