Moose::Manual::SupportUser)Contributed Perl DocumenMoose::Manual::Support(3pm)NAMEMoose::Manual::Support - Policies regarding support, releases, and
compatibility.
VERSION
version 2.2009
SUPPORT POLICY
There are two principles to Moose's policy of supported behavior.
1. Moose favors correctness over everything.
2. Moose supports documented and tested behavior, not accidental
behavior or side effects.
If a behavior has never been documented or tested, the behavior is
officially undefined. Relying upon undocumented and untested behavior
is done at your own risk.
If a behavior is documented or tested but found to be incorrect later,
the behavior will go through a deprecation period. During the
deprecation period, use of that feature will cause a warning.
Eventually, the deprecated feature will be removed.
In some cases, it is not possible to deprecate a behavior. In this
case, the behavior will simply be changed in a major release.
RELEASE SCHEDULE
Moose is on a system of quarterly major releases, with minor releases
as needed between major releases. A minor release is defined as one
that makes every attempt to preserve backwards compatibility. Currently
this means that we did not introduce any new dependency conflicts, and
that we did not make any changes to documented or tested behavior (this
typically means that minor releases will not change any existing tests
in the test suite, although they can add new ones). A minor release can
include new features and bug fixes.
Major releases may be backwards incompatible. Moose prioritizes
correctness over backwards compatibility or performance; see the
DEPRECATION POLICY to understand how backwards incompatible changes are
announced.
Major releases are scheduled to happen during fixed release windows. If
the window is missed, then there will not be a major release until the
next release window. The release windows are one month long, and occur
during the months of January, April, July, and October.
Before a major release, a series of development releases will be made
so that users can test the upcoming major release before it is
distributed to CPAN. It is in the best interests of everyone involved
if these releases are tested as widely as possible.
DEPRECATION POLICY
Moose has always prioritized correctness over performance and backwards
compatibility.
Major deprecations or API changes are documented in the Changes file as
well as in Moose::Manual::Delta. The Moose developers will also make an
effort to warn users of upcoming deprecations and breakage through the
Moose blog (http://blog.moose.perl.org).
Deprecated APIs will be preserved for at least one year after the major
release which deprecates that API. Deprecated APIs will only be removed
in a major release.
Moose will also warn during installation if the version of Moose being
installed will break an installed dependency. Unfortunately, due to the
nature of the Perl install process these warnings may be easy to miss.
BACKWARDS COMPATIBILITY
We try to ensure compatibility by having a extensive test suite (last
count over 18000 tests), as well as testing a number of packages
(currently just under 100 packages) that depend on Moose before any
release.
The current list of downstream dependencies that are tested is in
"xt/author/test-my-dependents.t".
VERSION NUMBERS
Moose version numbers consist of three parts, in the form X.YYZZ. The X
is the "special magic number" that only gets changed for really big
changes. Think of this as being like the "5" in Perl 5.12.1.
The YY portion is the major version number. Moose uses even numbers for
stable releases, and odd numbers for trial releases. The ZZ is the
minor version, and it simply increases monotonically. It starts at "00"
each time a new major version is released.
Semantically, this means that any two releases which share a major
version should be API-compatible with each other. In other words,
2.0200, 2.0201, and 2.0274 are all API-compatible.
Prior to version 2.0, Moose version numbers were monotonically
incrementing two decimal values (0.01, 0.02, ... 1.11, 1.12, etc.).
Moose was declared production ready at version 0.18 (via
<http://www.perlmonks.org/?node_id=608144>).
PERL VERSION COMPATIBILITY
As of version 2.16, Moose will officially support being run on perl
5.10.1+. Our current policy is to support the earliest version of Perl
shipped in the latest stable release of any major operating system
(this tends to mean CentOS). We will provide at least six months notice
(two major releases) when we decide to increase the officially
supported Perl version.
"Officially supported" does not mean that these are the only versions
of Perl that Moose will work with. Our declared perl dependency will
remain at 5.8.3 as long as our test suite continues to pass on 5.8.3.
What this does mean is that the core Moose dev team will not be
spending any time fixing bugs on versions that aren't officially
supported, and new contributions will not be rejected due to being
incompatible with older versions of perl except in the most trivial of
cases. We will, however, still welcome patches to make Moose compatible
with earlier versions, if other people are still interested in
maintaining compatibility. As such, the current minimum required
version of 5.8.3 will remain for as long as downstream users are happy
to assist with maintenance.
Note that although performance regressions are acceptable in order to
maintain backwards compatibility (as long as they only affect the older
versions), functionality changes and buggy behavior will not be. If it
becomes impossible to provide identical functionality between modern
Perl versions and unsupported Perl versions, we will increase our
declared perl dependency instead.
CONTRIBUTING
Moose has an open contribution policy. Anybody is welcome to submit a
patch. Please see Moose::Manual::Contributing for more details.
AUTHORS
· Stevan Little <stevan.little@iinteractive.com>
· Dave Rolsky <autarch@urth.org>
· Jesse Luehrs <doy@tozt.net>
· Shawn M Moore <code@sartak.org>
· יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
· Karen Etheridge <ether@cpan.org>
· Florian Ragwitz <rafl@debian.org>
· Hans Dieter Pearcey <hdp@weftsoar.net>
· Chris Prather <chris@prather.org>
· Matt S Trout <mst@shadowcat.co.uk>
COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
perl v5.26.1 2017-12-21 Moose::Manual::Support(3pm)
