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

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>

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

   ScannerPlugins
       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) ] });

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.

Name

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

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.

See Also

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

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 );

Version

       version 1.100

See Also