NAME

       Test::CPAN::Meta::Version - Validate CPAN META data against the specification

SYNOPSIS

         use Test::CPAN::Meta::Version;

DESCRIPTION

       This distribution was written to ensure that a META.yml file, provided with a standard
       distribution uploaded to CPAN, meets the specifications that are slowly being introduced
       to module uploads, via the use of package makers and installers such as
       ExtUtils::MakeMaker, Module::Build and Module::Install.

       This module is meant to be used together with Test::CPAN::Meta, however the code is self
       contained enough that you can access it directly.

       See CPAN::Meta for further details of the CPAN Meta Specification.

CLASS CONSTRUCTOR

       •   new( data => $data [, spec => $version] )

           The constructor must be passed a valid data structure.

           Optionally you may also provide a specification version. This version is then use to
           ensure that the given data structure meets the respective specification definition. If
           no version is provided the module will attempt to deduce the appropriate specification
           version from the data structure itself.

METHODS

   Main Methods
       •   parse()

           Using the given data structure provided with the constructor, attempts to parse and
           validate according to the appropriate specification definition.

           Returns 1 if any errors found, otherwise returns 0.

       •   errors()

           Returns a list of the errors found during parsing.

   Check Methods
       •   check_map($spec,$data)

           Checks whether a map (or hash) part of the data structure conforms to the appropriate
           specification definition.

       •   check_list($spec,$data)

           Checks whether a list (or array) part of the data structure conforms to the
           appropriate specification definition.

   Validator Methods
       •   header($self,$key,$value)

           Validates that the YAML header is valid.

           Note: No longer used as we now read the YAML data structure, not the file.

       •   url($self,$key,$value)

           Validates that a given value is in an acceptable URL format

       •   urlspec($self,$key,$value)

           Validates that the URL to a META.yml specification is a known one.

       •   string_or_undef($self,$key,$value)

           Validates that the value is either a string or an undef value. Bit of a catchall
           function for parts of the data structure that are completely user defined.

       •   string($self,$key,$value)

           Validates that a string exists for the given key.

       •   file($self,$key,$value)

           Validate that a file is passed for the given key. This may be made more thorough in
           the future. For now it acts like \&string.

       •   exversion($self,$key,$value)

           Validates a list of versions, e.g. '<= 5, >=2, ==3, !=4, >1, <6, 0'.

       •   version($self,$key,$value)

           Validates a single version string. Versions of the type '5.8.8' and '0.00_00' are both
           valid. A leading 'v' like 'v1.2.3' is also valid.

       •   boolean($self,$key,$value)

           Validates for a boolean value. Currently these values are '1', '0', 'true', 'false',
           however the latter 2 may be removed.

       •   license($self,$key,$value)

           Validates that a value is given for the license. Returns 1 if an known license type,
           or 2 if a value is given but the license type is not a recommended one.

       •   resource($self,$key,$value)

           Validates that the given key is in CamelCase, to indicate a user defined keyword.

       •   keyword($self,$key,$value)

           Validates that key is in an acceptable format for the META.yml specification, i.e. any
           in the character class [-_a-z].

           For user defined keys, although not explicitly stated in the specifications (v1.0 -
           v1.4), the convention is to precede the key with a pattern matching qr{\Ax_}i.
           Following this any character from the character class [-_a-zA-Z] can be used. This
           clarification has been added to v2.0 of the specification.

       •   identifier($self,$key,$value)

           Validates that key is in an acceptable format for the META.yml specification, for an
           identifier, i.e. any that matches the regular expression qr/[a-z][a-z_]/i.

       •   module($self,$key,$value)

           Validates that a given key is in an acceptable module name format, e.g.
           'Test::CPAN::Meta::Version'.

       •   anything($self,$key,$value)

           Usually reserved for user defined structures, allowing them to be considered valid
           without a need for a specification definition for the structure.

BUGS, PATCHES & FIXES

       There are no known bugs at the time of this release. However, if you spot a bug or are
       experiencing difficulties that are not explained within the POD documentation, please send
       an email to barbie@cpan.org or submit a bug to the RT system
       (http://rt.cpan.org/Public/Dist/Display.html?Name=Test-CPAN-Meta).  However, it would help
       greatly if you are able to pinpoint problems or even supply a patch.

       Fixes are dependent upon their severity and my availability. Should a fix not be
       forthcoming, please feel free to (politely) remind me.

AUTHOR

       Barbie, <barbie@cpan.org> for Miss Barbell Productions, <http://www.missbarbell.co.uk>

COPYRIGHT AND LICENSE

         Copyright (C) 2007-2015 Barbie for Miss Barbell Productions

         This distribution is free software; you can redistribute it and/or
         modify it under the Artistic Licence v2.