perldoc > Package::DeprecationManager(3pm)

NAME
    Package::DeprecationManager - Manage deprecation warnings for your distribution

VERSION
    version 0.18

SYNOPSIS
      package My::Class;

      use Package::DeprecationManager -deprecations => {
          'My::Class::foo' => '0.02',
          'My::Class::bar' => '0.05',
          'feature-X'      => '0.07',
      };

      sub foo {
          deprecated( 'Do not call foo!' );

          ...
      }

      sub bar {
          deprecated();

          ...
      }

      sub baz {
          my %args = @_;

          if ( $args{foo} ) {
              deprecated(
                  message => ...,
                  feature => 'feature-X',
              );
          }
      }

      package Other::Class;

      use My::Class -api_version => '0.04';

      My::Class->new()->foo(); # warns
      My::Class->new()->bar(); # does not warn
      My::Class->new()->bar(); # does not warn again

DESCRIPTION
    This module allows you to manage a set of deprecations for one or more modules.

    When you import "Package::DeprecationManager", you must provide a set of "-deprecations" as a
    hash ref. The keys are "feature" names, and the values are the version when that feature was
    deprecated.

    In many cases, you can simply use the fully qualified name of a subroutine or method as the
    feature name. This works for cases where the whole subroutine is deprecated. However, the
    feature names can be any string. This is useful if you don't want to deprecate an entire
    subroutine, just a certain usage.

    You can also provide an optional array reference in the "-ignore" parameter.

    The values to be ignored can be package names or regular expressions (made with "qr//"). Use
    this to ignore packages in your distribution that can appear on the call stack when a deprecated
    feature is used.

    As part of the import process, "Package::DeprecationManager" will export two subroutines into
    its caller. It provides an import() sub for the caller and a deprecated() sub.

    The import() sub allows callers of *your* class to specify an "-api_version" parameter. If this
    is supplied, then deprecation warnings are only issued for deprecations with API versions
    earlier than the one specified.

    You must call the deprecated() sub in each deprecated subroutine. When called, it will issue a
    warning using Carp::cluck().

    The deprecated() sub can be called in several ways. If you do not pass any arguments, it will
    generate an appropriate warning message. If you pass a single argument, this is used as the
    warning message.

    Finally, you can call it with named arguments. Currently, the only allowed names are "message"
    and "feature". The "feature" argument should correspond to the feature name passed in the
    "-deprecations" hash.

    If you don't explicitly specify a feature, the deprecated() sub uses caller() to identify its
    caller, using its fully qualified subroutine name.

    A given deprecation warning is only issued once for a given package. This module tracks this
    based on both the feature name *and* the error message itself. This means that if you provide
    several different error messages for the same feature, all of those errors will appear.

  Other import() subs
    This module works by installing an "import" sub in any package that uses it. If that package
    *already* has an "import" sub, then that "import" will be called after any arguments passed for
    "Package::DeprecationManager" are stripped out. You need to define your "import" sub before you
    "use Package::DeprecationManager" to make this work:

      package HasExporter;

      use Exporter qw( import );

      use Package::DeprecationManager -deprecations => {
          'HasExporter::foo' => '0.02',
      };

      our @EXPORT_OK = qw( some_sub another_sub );

DONATIONS
    If you'd like to thank me for the work I've done on this module, please consider making a
    "donation" to me via PayPal. I spend a lot of free time creating free software, and would
    appreciate any support you'd care to offer.

    Please note that I am not suggesting that you must do this in order for me to continue working
    on this particular software. I will continue to do so, inasmuch as I have in the past, for as
    long as it interests me.

    Similarly, a donation made in this way will probably not make me work on this software much
    more, unless I get so many donations that I can consider working on free software full time,
    which seems unlikely at best.

    To donate, log into PayPal and send money to autarch AT urth.org or use the button on this page:
    <http://www.urth.org/~autarch/fs-donation.html>

CREDITS
    The idea for this functionality and some of its implementation was originally created as
    Class::MOP::Deprecated by Goro Fuji.

BUGS
    Please report any bugs or feature requests to "bug-package-deprecationmanager AT rt.org", or
    through the web interface at <http://rt.cpan.org>. I will be notified, and then you'll
    automatically be notified of progress on your bug as I make changes.

    Bugs may be submitted at <https://github.com/moose/Package-DeprecationManager/issues>.

SOURCE
    The source code repository for Package-DeprecationManager can be found at
    <https://github.com/moose/Package-DeprecationManager>.

DONATIONS
    If you'd like to thank me for the work I've done on this module, please consider making a
    "donation" to me via PayPal. I spend a lot of free time creating free software, and would
    appreciate any support you'd care to offer.

    Please note that I am not suggesting that you must do this in order for me to continue working
    on this particular software. I will continue to do so, inasmuch as I have in the past, for as
    long as it interests me.

    Similarly, a donation made in this way will probably not make me work on this software much
    more, unless I get so many donations that I can consider working on free software full time
    (let's all have a chuckle at that together).

    To donate, log into PayPal and send money to autarch AT urth.org, or use the button at
    <https://houseabsolute.com/foss-donations/>.

AUTHOR
    Dave Rolsky <autarch AT urth.org>

CONTRIBUTORS
    *   Aristotle Pagaltzis <pagaltzis AT gmx.de>

    *   Jesse Luehrs <doy AT tozt.net>

    *   Karen Etheridge <ether AT cpan.org>

    *   Tomas Doran <bobtfish AT bobtfish.net>

COPYRIGHT AND LICENSE
    This software is Copyright (c) 2023 by Dave Rolsky.

    This is free software, licensed under:

      The Artistic License 2.0 (GPL Compatible)

    The full text of the license can be found in the LICENSE file included with this distribution.