Add docs for automatin rules

docs/automation-rules.rst

@@ -0,0 +1,137 @@
+Automation Rules
+================
+
+Automation rules allow you to execute some actions over new versions.
+
+By default when new versions are created,
+they are not activated.
+If you want to activate it and do other type of actions,
+you need to log in your Read the Docs account first.
+
+Creating an automation rule
+---------------------------
+
+#. Go to your project :guilabel:`Admin` > :guilabel:`Automation Rules`
+#. Click on "Add Rule" button
+#. Fill in the fields
+
+   - Description: A description of what the rule does
+   - Match: What versions the rule should be applied to
+   - Version type: What type of versions the rule should be applied to
+   - Action: What action should be applied to matching versions
+
+#. Click "Save"
+
+How do they work?
+-----------------
+
+When a new tag or branch is pushed to your repository,
+Read the Docs creates a new version.
+
+All rules are run over this version in the order they are listed,
+if the version matches the version type and the pattern in the rule,
+an action is executed over that version.
+
+.. note::
+
+   All actions of the rules that the version matches will be executed over that version.
+
+Predefined matches
+------------------
+
+There are some predefined matches:
+
+- **Any version**: All new versions will match.
+- **SemVer versions**: All new versions that follow `semantic versioning <https://semver.org/>`__ will match.
+
+User defined matches
+--------------------
+
+If none of the above predefined matches meet your use case,
+choose **Custom match**.
+
+The custom match should be a valid `Python regular expression <https://docs.python.org/3/library/re.html>`__.
+Each new version will be tested against this regular expression.
+
+Actions
+-------
+
+Actions are the task to be executed over the matching version.
+Currently, this actions are available:
+
+- **Activate version**: Activates and builds the version.
+- **Set version as default**: Sets the version as default,
+  i.e. the version of your project that `/` redirects to.
+  See more in :ref:`automatic-redirects:Root URL`.
+  It also activates and builds the version.
+
+.. note::
+
+   If your versions follow :pep:`440`,
+   Read the Docs activates and builds the version if it's greater than the current stable version,
+   and updates the stable version.
+   See more in :doc:`versions`.
+
+Order
+-----
+
+The order your rules are listed in  :guilabel:`Admin` > :guilabel:`Automation Rules` matters.
+Each action will be executed in that order,
+so first rules have a higher priority.
+
+You can change the order using the up and down arrow buttons.
+
+.. note::
+
+   New rules are added at the end (lower priority).
+
+Examples
+--------
+
+Activate all new tags
+~~~~~~~~~~~~~~~~~~~~~
+
+- Match: ``Any version``
+- Version type: ``Tag``
+- Action: ``Activate version``
+
+Activate only new branches that belong to the ``1.x`` release
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- Custom match: ``^1\.\d+$``
+- Version type: ``Branch``
+- Action: ``Activate version``
+
+Set as default new tags that have the ``-stable`` or ``-release`` suffix
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- Custom match: ``-(stable)|(release)$``
+- Version type: ``Tag``
+- Action: ``Set version as default``
+
+.. note::
+
+   You can also create two rules, one to match ``-stable`` and
+   other to match ``-release``.
+
+Activate all new tags and branches that start with ``v`` or ``V``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- Custom match: ``^[vV]``
+- Version type: ``Tag``
+- Action: ``Activate version``
+
+
+- Custom match: ``^[vV]``
+- Version type: ``Branch``
+- Action: ``Activate version``
+
+Activate all new tags that don't contain the ``-nightly`` suffix
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. TODO: update example if https://github.com/readthedocs/readthedocs.org/issues/6354 is approved.
+
+
+- Custom match: ``.*(?<!-nightly)$``
+- Version type: ``Tag``
+- Action: ``Activate version``

docs/index.rst

@@ -121,6 +121,9 @@ out of your documentation and Read the Docs.
   :doc:`User defined redirects <user-defined-redirects>` |
   :doc:`Automatic redirects <automatic-redirects>`
 
+* **Versions**
+  :doc:`Automation rules <automation-rules>`
+
 * **Topic specific guides**:
   :doc:`How-to guides <guides/index>`
 
@@ -142,6 +145,8 @@ out of your documentation and Read the Docs.
    user-defined-redirects
    automatic-redirects
 
+   automation-rules
+
    guides/index
 
    api/index