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Docsite: update "Migrating Ansible content to a different collection" info (#72710)

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* add a reminder about ignore-*.txt entries, fix formatting, add symlink removal note
* Update docs/docsite/rst/dev_guide/developing_collections.rst

Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: David Moreau Simard <moi@dmsimard.com>
Co-authored-by: Alicia Cozine <879121+acozine@users.noreply.github.com>
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Andrew Klychkov 2020-12-03 22:29:01 +03:00 committed by GitHub
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docs/docsite/rst/dev_guide/developing_collections.rst
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@ -538,19 +538,30 @@ First, look at `Ansible Collection Checklist <https://github.com/ansible-collect
To migrate content from one collection to another, if the collections are parts of `Ansible distribution <https://github.com/ansible-community/ansible-build-data/blob/main/2.10/ansible.in>`_:
#. Copy content from the source (old) collection to the target collection.
#. Deprecate the module/plugin with ``removal_version`` scheduled for the next major version in ``meta/runtime.yml`` of the source collection. The deprecation must be released after the copied content has been included in a release of the target collection.
#. When the next major release comes:
#. Copy content from the source (old) collection to the target (new) collection.
#. Deprecate the module/plugin with ``removal_version`` scheduled for the next major version in ``meta/runtime.yml`` of the old collection. The deprecation must be released after the copied content has been included in a release of the new collection.
#. When the next major release of the old collection is prepared:
* remove the module/plugin from the source collection
* add ``redirect`` to the corresponding entry in ``meta/runtime.yml``
* remove ``removal_version`` from there
* remove the module/plugin from the old collection
* remove the symlink stored in ``plugin/modules`` directory if appropriate (mainly when removing from ``community.general`` and ``community.network``)
* remove related unit and integration tests
* remove specific module utils
* remove specific documentation fragments if there are any in the old collection
* add a changelog fragment containing entries for ``removed_features`` and ``breaking_changes``; you can see an example of a changelog fragment in this `pull request <https://github.com/ansible-collections/community.general/pull/1304>`_
* change ``meta/runtime.yml`` in the old collection:
* add ``redirect`` to the corresponding module/plugin's entry
* in particular, add ``redirect`` for the removed module utils and documentation fragments if applicable
* remove ``removal_version`` from there
* remove related entries from ``tests/sanity/ignore.txt`` files if exist
* remove changelog fragments for removed content that are not yet part of the changelog (in other words, do not modify `changelogs/changelog.yaml` and do not delete files mentioned in it)
* remove requirements that are no longer required in ``tests/unit/requirements.txt``, ``tests/requirements.yml`` and ``galaxy.yml``
According to the above, you need to create at least three PRs as follows:
#. Create a PR against the target collection to copy the content.
#. Deprecate the module/plugin in the source collection.
#. Later create a PR against the source collection to remove the content according to the schedule.
#. Create a PR against the new collection to copy the content.
#. Deprecate the module/plugin in the old collection.
#. Later create a PR against the old collection to remove the content according to the schedule.
Adding the content to the new collection