potiuk commented on code in PR #33144:
URL: https://github.com/apache/airflow/pull/33144#discussion_r1286873162


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dev/MANUALLY_GENERATING_IMAGE_CACHE_AND_CONSTRAINTS.md:
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+<!--
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License.  You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied.  See the License for the
+ specific language governing permissions and limitations
+ under the License.
+-->
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update 
-->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**  *generated with 
[DocToc](https://github.com/thlorenz/doctoc)*
+
+- [Purpose of the document](#purpose-of-the-document)
+- [Automated image cache and constraints refreshing in 
CI](#automated-image-cache-and-constraints-refreshing-in-ci)
+- [Manually refreshing the image cache](#manually-refreshing-the-image-cache)
+  - [Why we need to update image cache 
manually](#why-we-need-to-update-image-cache-manually)
+  - [Prerequisites](#prerequisites)
+  - [How to refresh the image cache](#how-to-refresh-the-image-cache)
+  - [Is it safe to refresh the image 
cache?](#is-it-safe-to-refresh-the-image-cache)
+  - [What the command does](#what-the-command-does)
+- [Manually generating constraint files](#manually-generating-constraint-files)
+  - [Why we need to generate constraint files 
manually](#why-we-need-to-generate-constraint-files-manually)
+  - [How to generate constraint files](#how-to-generate-constraint-files)
+  - [Is it safe to generate constraints 
manually?](#is-it-safe-to-generate-constraints-manually)
+- [Manually updating already tagged constraint 
files](#manually-updating-already-tagged-constraint-files)
+  - [Why we need to update constraint files manually (very 
rarely)](#why-we-need-to-update-constraint-files-manually-very-rarely)
+  - [How to update the constraints](#how-to-update-the-constraints)
+  - [Is it safe to update constraints 
manually?](#is-it-safe-to-update-constraints-manually)
+  - [How the command works under-the-hood 
?](#how-the-command-works-under-the-hood-)
+  - [Examples of running the command](#examples-of-running-the-command)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+# Purpose of the document
+
+This documents contains explanation of a few manual procedures we might use at 
certain times, to update
+our CI and constraints manually when the automation of our CI is not enough. 
There are some edge cases
+and events that might trigger the need of refreshing the information stored in 
our GitHub Repository.
+
+We are storing two things we are storing in our GitHub Registry that are 
needed for both - our contributors
+and users:
+
+* `CI and PROD image cache` - used by our CI jobs to speed up building of 
images while CI jobs are running
+* `Constraints files` - used by both, CI jobs (to fix the versions of 
dependencies used by CI jobs in regular
+  PRs) and used by our users to reproducibly install released airflow versions.
+
+Normally, both are updated and refreshed automatically vi [CI 
system](../CI.rst). However, there are some
+cases where we need to update them manually. This document describes how to do 
it.
+
+# Automated image cache and constraints refreshing in CI
+
+Our [CI system](../CI.rst) is build in the way that it self-maintains. Regular 
scheduled builds and
+merges to `main` branch have separate maintenance step that take care about 
refreshing the cache that is
+used to speed up our builds and to speed up rebuilding of 
[Breeze](../BREEZE.rst) images for development
+purpose. This is all happening automatically, usually:
+
+* The latest [constraints](../CONTRIBUTING.rst#pinned-constraint-files) are 
pushed to appropriate branch
+  after all tests succeeded in `main` merge or in `scheduled` build

Review Comment:
   I realised this chapter was a little outdated an inacurate. Updated a lot of 
it.



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