perl-package-deprecationmanager

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.