document our deprecation (#37788)
* document our deprecation fixes #37779 * Copy edit.
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@ -133,6 +133,22 @@ maintainers will on fixes towards the release candidate.
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Merging new features or fixes that are not related to the release candidate may
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be delayed in order to allow the new release to be shipped as soon as possible.
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Deprecation Cycle
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`````````````````
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Sometimes we need to remove a feature, normally in favor of a reimplementation that we hope does a better job.
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To do this we have a deprecation cycle. First we mark a feature as 'deprecated'. This is normally accompanied with warnings
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to the user as to why we deprecated it, what alternatives they should switch to and when (which version) we are scheduled
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to remove the feature permanently.
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The cycle is normally across 4 feature releases (2.x.y, where the x marks a feature release and the y a bugfix release),
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so the feature is normally removed in the 4th release after we announce the deprecation.
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For example, something deprecated in 2.5 will be removed in 2.9, assuming we don't jump to 3.x before that point.
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The tracking is tied to the number of releases, not the release numbering.
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For modules/plugins, we keep the documentation after the removal for users of older versions.
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.. seealso::
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:ref:`community_committer_guidelines`
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