Replace changelog/updating with release notes and towncrier now (apac…

…he#22003)

.dockerignore

@@ -49,7 +49,7 @@
 !.flake8
 !.dockerignore
 !pytest.ini
-!CHANGELOG.txt
+!RELEASE_NOTES.rst
 !LICENSE
 !MANIFEST.in
 !NOTICE

.github/PULL_REQUEST_TEMPLATE.md

@@ -20,4 +20,4 @@ http://chris.beams.io/posts/git-commit/
 Read the **[Pull Request Guidelines](https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst#pull-request-guidelines)** for more information.
 In case of fundamental code change, Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals)) is needed.
 In case of a new dependency, check compliance with the [ASF 3rd Party License Policy](https://www.apache.org/legal/resolved.html#category-x).
-In case of backwards incompatible changes please leave a note in [UPDATING.md](https://github.com/apache/airflow/blob/main/UPDATING.md).
+In case of backwards incompatible changes please leave a note in a newsfragement file, named `{pr_number}.significant.rst`, in [newsfragments](https://github.com/apache/airflow/tree/main/newsfragments).

.pre-commit-config.yaml

@@ -64,7 +64,7 @@ repos:
           \.cfg$|\.conf$|\.ini$|\.ldif$|\.properties$|\.readthedocs$|\.service$|\.tf$|Dockerfile.*$
       - id: insert-license
         name: Add license for all rst files
-        exclude: ^\.github/.*$|^airflow/_vendor/
+        exclude: ^\.github/.*$|^airflow/_vendor/|newsfragments/.*\.rst$
         args:
           - --comment-style
           - "||"
@@ -266,7 +266,7 @@ repos:
           The word(s) should be in lowercase." && exec codespell "$@"' --
         language: python
         types: [text]
-        exclude: ^airflow/_vendor/|^CHANGELOG\.txt$|^airflow/www/static/css/material-icons\.css$|^images/.*$
+        exclude: ^airflow/_vendor/|^RELEASE_NOTES\.txt$|^airflow/www/static/css/material-icons\.css$|^images/.*$
         args:
           - --ignore-words=docs/spelling_wordlist.txt
           - --skip=docs/*/commits.rst,airflow/providers/*/*.rst,*.lock,INTHEWILD.md,*.min.js,docs/apache-airflow/pipeline_example.csv
@@ -741,6 +741,12 @@ repos:
         files: CHANGELOG\.txt$|CHANGELOG\.rst$
         entry: ./scripts/ci/pre_commit/pre_commit_changelog_duplicates.py
         pass_filenames: true
+      - id: newsfragments
+        name: Check newsfragments are valid
+        language: python
+        files: newsfragments/.*\.rst
+        entry: ./scripts/ci/pre_commit/pre_commit_newsfragments.py
+        pass_filenames: true
         ## ADD MOST PRE-COMMITS ABOVE THAT LINE
         # The below pre-commits are those requiring CI image to be built
       - id: mypy

.rat-excludes

@@ -33,7 +33,6 @@ metastore_db
 .*svg
 .*csv
 .*md5
-CHANGELOG.txt
 .*zip
 .*lock
 unittests.cfg

CONTRIBUTING.rst

@@ -329,6 +329,25 @@ Step 4: Prepare PR
      this step is automatically run while you are committing your code. If not, you can do it manually
      via ``git add`` and then ``pre-commit run``.
 
+   * Consider adding a newsfragment to your PR so you can add an entry in the release notes.
+     The following newsfragment types are supported:
+
+     * `significant`
+     * `feature`
+     * `improvement`
+     * `bugfix`
+     * `doc`
+     * `misc`
+
+     Core newsfragments go in `newsfragments <https://github.com/apache/airflow/blob/main/newsfragments>`__
+     and helm chart newsfragments go in
+     `chart/newsfragments <https://github.com/apache/airflow/blob/main/chart/newsfragments>`__.
+     Simply create an rst file named ``{pr_number}.{type}.rst`` (e.g. ``{1234}.bugfix.rst``).
+
+     For significant newsfragments, similar to git commits, the first line is the summary and optionally a
+     body can be added with an empty line separating it.
+     For other newsfragment types, only use a single summary line.
+
 2. Rebase your fork, squash commits, and resolve all conflicts. See `How to rebase PR <#how-to-rebase-pr>`_
    if you need help with rebasing your change. Remember to rebase often if your PR takes a lot of time to
    review/fix. This will make rebase process much easier and less painful and the more often you do it,

MANIFEST.in

@@ -18,7 +18,7 @@
 
 include NOTICE
 include LICENSE
-include CHANGELOG.txt
+include RELEASE_NOTES.rst
 include README.md
 graft licenses
 graft airflow/www