NAME

       Perl::PrereqScanner - a tool to scan your Perl code for its prerequisites

VERSION

       version 1.100

SYNOPSIS

         use Perl::PrereqScanner;
         my $scanner = Perl::PrereqScanner->new;
         my $prereqs = $scanner->scan_ppi_document( $ppi_doc );
         my $prereqs = $scanner->scan_file( $file_path );
         my $prereqs = $scanner->scan_string( $perl_code );
         my $prereqs = $scanner->scan_module( $module_name );

DESCRIPTION

       The scanner will extract loosely your distribution prerequisites from your files.

       The extraction may not be perfect but tries to do its best. It will currently find the
       following prereqs:

       •   plain lines beginning with "use" or "require" in your perl modules and scripts,
           including minimum perl version

       •   regular inheritance declared with the "base" and "parent" pragmata

       •   Moose inheritance declared with the "extends" keyword

       •   Moose roles included with the "with" keyword

       •   OO namespace aliasing using the "aliased" module

   Scanner Plugins
       Perl::PrereqScanner works by running a series of scanners over a PPI::Document
       representing the code to scan.  By default the "Perl5", "Moose", "TestMore", "POE", and
       "Aliased" scanners are run.  You can supply your own scanners when constructing your
       PrereqScanner:

         # Us only the Perl5 scanner:
         my $scanner = Perl::PrereqScanner->new({ scanners => [ qw(Perl5) ] });

         # Use any stock scanners, plus Example:
         my $scanner = Perl::PrereqScanner->new({ extra_scanners => [ qw(Example) ] });

PERL VERSION

       This library should run on perls released even a long time ago.  It should work on any
       version of perl released in the last five years.

       Although it may work on older versions of perl, no guarantee is made that the minimum
       required version will not be increased.  The version may be increased for any reason, and
       there is no promise that patches will be accepted to lower the minimum required perl.

METHODS

   scan_string
         my $prereqs = $scanner->scan_string( $perl_code );

       Given a string containing Perl source code, this method returns a CPAN::Meta::Requirements
       object describing the modules it requires.

       This method will throw an exception if PPI fails to parse the code.

       Warning!  It isn't entirely clear whether PPI prefers to receive strings as octet strings
       or character strings.  For now, my advice is to pass octet strings.

   scan_file
         my $prereqs = $scanner->scan_file( $path );

       Given a file path to a Perl document, this method returns a CPAN::Meta::Requirements
       object describing the modules it requires.

       This method will throw an exception if PPI fails to parse the code.

   scan_ppi_document
         my $prereqs = $scanner->scan_ppi_document( $ppi_doc );

       Given a PPI::Document, this method returns a CPAN::Meta::Requirements object describing
       the modules it requires.

   scan_module
         my $prereqs = $scanner->scan_module( $module_name );

       Given the name of a module, eg 'PPI::Document', this method returns a
       CPAN::Meta::Requirements object describing the modules it requires.

SEE ALSO

       scan-perl-prereqs, in this distribution, is a command-line interface to the scanner

AUTHORS

       •   Jerome Quelin

       •   Ricardo Signes <cpan@semiotic.systems>

CONTRIBUTORS

       •   bowtie <bowtie@cpan.org>

       •   celogeek <me@celogeek.com>

       •   Christopher J. Madsen <perl@cjmweb.net>

       •   Dan Book <grinnz@grinnz.com>

       •   David Golden <dagolden@cpan.org>

       •   David Steinbrunner <dsteinbrunner@pobox.com>

       •   Ed J <mohawk2@users.noreply.github.com>

       •   Florian Ragwitz <rafl@debian.org>

       •   Jakob Voss <voss@gbv.de>

       •   Jérôme Quelin <jquelin@gmail.com>

       •   John SJ Anderson <genehack@genehack.org>

       •   Karen Etheridge <ether@cpan.org>

       •   Mark Gardner <gardnerm@gsicommerce.com>

       •   Neil Bowers <neil@bowers.com>

       •   Randy Stauner <rwstauner@cpan.org>

       •   Ricardo Signes <rjbs@semiotic.systems>

       •   Tina Mueller <tinita@cpan.org>

       •   Vyacheslav Matjukhin <mmcleric@yandex-team.ru>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2009 by Jerome Quelin.

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