auto-generate releases.rst

diff --git a/documentation/.gitignore b/documentation/.gitignore
index 096b97ec2..4e077d03f 100644
--- a/documentation/.gitignore
+++ b/documentation/.gitignore
@@ -2,6 +2,7 @@  _build/
 Pipfile.lock
 poky.yaml
 sphinx-static/switchers.js
+releases.rst
 .vscode/
 */svg/*.png
 */svg/*.pdf
diff --git a/documentation/releases.rst b/documentation/releases.rst
deleted file mode 100644
index b2b448615..000000000
--- a/documentation/releases.rst
+++ /dev/null
@@ -1,251 +0,0 @@ 
-.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
-
-..
-   NOTE FOR RELEASE MAINTAINERS:
-   This file only needs updating in the development release ("master" branch)
-   When documentation for stable releases is built,
-   the latest version from "master" is used
-   by https://git.yoctoproject.org/yocto-autobuilder-helper/tree/scripts/run-docs-build
-
-===========================
- Supported Release Manuals
-===========================
-
-******************************
-Release Series 4.0 (kirkstone)
-******************************
-
-- :yocto_docs:`4.0 Documentation </4.0>`
-- :yocto_docs:`4.0.1 Documentation </4.0.1>`
-- :yocto_docs:`4.0.2 Documentation </4.0.2>`
-
-****************************
-Release Series 3.1 (dunfell)
-****************************
-
-- :yocto_docs:`3.1 Documentation </3.1>`
-- :yocto_docs:`3.1.1 Documentation </3.1.1>`
-- :yocto_docs:`3.1.2 Documentation </3.1.2>`
-- :yocto_docs:`3.1.3 Documentation </3.1.3>`
-- :yocto_docs:`3.1.4 Documentation </3.1.4>`
-- :yocto_docs:`3.1.5 Documentation </3.1.5>`
-- :yocto_docs:`3.1.6 Documentation </3.1.6>`
-- :yocto_docs:`3.1.7 Documentation </3.1.7>`
-- :yocto_docs:`3.1.8 Documentation </3.1.8>`
-- :yocto_docs:`3.1.9 Documentation </3.1.9>`
-- :yocto_docs:`3.1.10 Documentation </3.1.10>`
-- :yocto_docs:`3.1.11 Documentation </3.1.11>`
-- :yocto_docs:`3.1.12 Documentation </3.1.12>`
-- :yocto_docs:`3.1.13 Documentation </3.1.13>`
-- :yocto_docs:`3.1.14 Documentation </3.1.14>`
-- :yocto_docs:`3.1.15 Documentation </3.1.15>`
-- :yocto_docs:`3.1.16 Documentation </3.1.16>`
-- :yocto_docs:`3.1.17 Documentation </3.1.17>`
-
-==========================
- Outdated Release Manuals
-==========================
-
-******************************
-Release Series 3.4 (honister)
-******************************
-
-- :yocto_docs:`3.4 Documentation </3.4>`
-- :yocto_docs:`3.4.1 Documentation </3.4.1>`
-- :yocto_docs:`3.4.2 Documentation </3.4.2>`
-- :yocto_docs:`3.4.3 Documentation </3.4.3>`
-- :yocto_docs:`3.4.4 Documentation </3.4.4>`
-
-******************************
-Release Series 3.3 (hardknott)
-******************************
-
-- :yocto_docs:`3.3 Documentation </3.3>`
-- :yocto_docs:`3.3.1 Documentation </3.3.1>`
-- :yocto_docs:`3.3.2 Documentation </3.3.2>`
-- :yocto_docs:`3.3.3 Documentation </3.3.3>`
-- :yocto_docs:`3.3.4 Documentation </3.3.4>`
-- :yocto_docs:`3.3.5 Documentation </3.3.5>`
-- :yocto_docs:`3.3.6 Documentation </3.3.6>`
-
-*******************************
-Release Series 3.2 (gatesgarth)
-*******************************
-
-- :yocto_docs:`3.2 Documentation </3.2>`
-- :yocto_docs:`3.2.1 Documentation </3.2.1>`
-- :yocto_docs:`3.2.2 Documentation </3.2.2>`
-- :yocto_docs:`3.2.3 Documentation </3.2.3>`
-- :yocto_docs:`3.2.4 Documentation </3.2.4>`
-
-*************************
-Release Series 3.0 (zeus)
-*************************
-
-- :yocto_docs:`3.0 Documentation </3.0>`
-- :yocto_docs:`3.0.1 Documentation </3.0.1>`
-- :yocto_docs:`3.0.2 Documentation </3.0.2>`
-- :yocto_docs:`3.0.3 Documentation </3.0.3>`
-- :yocto_docs:`3.0.4 Documentation </3.0.4>`
-
-****************************
-Release Series 2.7 (warrior)
-****************************
-
-- :yocto_docs:`2.7 Documentation </2.7>`
-- :yocto_docs:`2.7.1 Documentation </2.7.1>`
-- :yocto_docs:`2.7.2 Documentation </2.7.2>`
-- :yocto_docs:`2.7.3 Documentation </2.7.3>`
-- :yocto_docs:`2.7.4 Documentation </2.7.4>`
-
-*************************
-Release Series 2.6 (thud)
-*************************
-
-- :yocto_docs:`2.6 Documentation </2.6>`
-- :yocto_docs:`2.6.1 Documentation </2.6.1>`
-- :yocto_docs:`2.6.2 Documentation </2.6.2>`
-- :yocto_docs:`2.6.3 Documentation </2.6.3>`
-- :yocto_docs:`2.6.4 Documentation </2.6.4>`
-
-*************************
-Release Series 2.5 (sumo)
-*************************
-
-- :yocto_docs:`2.5 Documentation </2.5>`
-- :yocto_docs:`2.5.1 Documentation </2.5.1>`
-- :yocto_docs:`2.5.2 Documentation </2.5.2>`
-- :yocto_docs:`2.5.3 Documentation </2.5.3>`
-
-**************************
-Release Series 2.4 (rocko)
-**************************
-
-- :yocto_docs:`2.4 Documentation </2.4>`
-- :yocto_docs:`2.4.1 Documentation </2.4.1>`
-- :yocto_docs:`2.4.2 Documentation </2.4.2>`
-- :yocto_docs:`2.4.3 Documentation </2.4.3>`
-- :yocto_docs:`2.4.4 Documentation </2.4.4>`
-
-*************************
-Release Series 2.3 (pyro)
-*************************
-
-- :yocto_docs:`2.3 Documentation </2.3>`
-- :yocto_docs:`2.3.1 Documentation </2.3.1>`
-- :yocto_docs:`2.3.2 Documentation </2.3.2>`
-- :yocto_docs:`2.3.3 Documentation </2.3.3>`
-- :yocto_docs:`2.3.4 Documentation </2.3.4>`
-
-**************************
-Release Series 2.2 (morty)
-**************************
-
-- :yocto_docs:`2.2 Documentation </2.2>`
-- :yocto_docs:`2.2.1 Documentation </2.2.1>`
-- :yocto_docs:`2.2.2 Documentation </2.2.2>`
-- :yocto_docs:`2.2.3 Documentation </2.2.3>`
-
-****************************
-Release Series 2.1 (krogoth)
-****************************
-
-- :yocto_docs:`2.1 Documentation </2.1>`
-- :yocto_docs:`2.1.1 Documentation </2.1.1>`
-- :yocto_docs:`2.1.2 Documentation </2.1.2>`
-- :yocto_docs:`2.1.3 Documentation </2.1.3>`
-
-***************************
-Release Series 2.0 (jethro)
-***************************
-
-- :yocto_docs:`1.9 Documentation </1.9>`
-- :yocto_docs:`2.0 Documentation </2.0>`
-- :yocto_docs:`2.0.1 Documentation </2.0.1>`
-- :yocto_docs:`2.0.2 Documentation </2.0.2>`
-- :yocto_docs:`2.0.3 Documentation </2.0.3>`
-
-*************************
-Release Series 1.8 (fido)
-*************************
-
-- :yocto_docs:`1.8 Documentation </1.8>`
-- :yocto_docs:`1.8.1 Documentation </1.8.1>`
-- :yocto_docs:`1.8.2 Documentation </1.8.2>`
-
-**************************
-Release Series 1.7 (dizzy)
-**************************
-
-- :yocto_docs:`1.7 Documentation </1.7>`
-- :yocto_docs:`1.7.1 Documentation </1.7.1>`
-- :yocto_docs:`1.7.2 Documentation </1.7.2>`
-- :yocto_docs:`1.7.3 Documentation </1.7.3>`
-
-**************************
-Release Series 1.6 (daisy)
-**************************
-
-- :yocto_docs:`1.6 Documentation </1.6>`
-- :yocto_docs:`1.6.1 Documentation </1.6.1>`
-- :yocto_docs:`1.6.2 Documentation </1.6.2>`
-- :yocto_docs:`1.6.3 Documentation </1.6.3>`
-
-*************************
-Release Series 1.5 (dora)
-*************************
-
-- :yocto_docs:`1.5 Documentation </1.5>`
-- :yocto_docs:`1.5.1 Documentation </1.5.1>`
-- :yocto_docs:`1.5.2 Documentation </1.5.2>`
-- :yocto_docs:`1.5.3 Documentation </1.5.3>`
-- :yocto_docs:`1.5.4 Documentation </1.5.4>`
-
-**************************
-Release Series 1.4 (dylan)
-**************************
-
-- :yocto_docs:`1.4 Documentation </1.4>`
-- :yocto_docs:`1.4.1 Documentation </1.4.1>`
-- :yocto_docs:`1.4.2 Documentation </1.4.2>`
-- :yocto_docs:`1.4.3 Documentation </1.4.3>`
-- :yocto_docs:`1.4.4 Documentation </1.4.4>`
-- :yocto_docs:`1.4.5 Documentation </1.4.5>`
-
-**************************
-Release Series 1.3 (danny)
-**************************
-
-- :yocto_docs:`1.3 Documentation </1.3>`
-- :yocto_docs:`1.3.1 Documentation </1.3.1>`
-- :yocto_docs:`1.3.2 Documentation </1.3.2>`
-
-***************************
-Release Series 1.2 (denzil)
-***************************
-
-- :yocto_docs:`1.2 Documentation </1.2>`
-- :yocto_docs:`1.2.1 Documentation </1.2.1>`
-- :yocto_docs:`1.2.2 Documentation </1.2.2>`
-
-***************************
-Release Series 1.1 (edison)
-***************************
-
-- :yocto_docs:`1.1 Documentation </1.1>`
-- :yocto_docs:`1.1.1 Documentation </1.1.1>`
-- :yocto_docs:`1.1.2 Documentation </1.1.2>`
-
-****************************
-Release Series 1.0 (bernard)
-****************************
-
-- :yocto_docs:`1.0 Documentation </1.0>`
-- :yocto_docs:`1.0.1 Documentation </1.0.1>`
-- :yocto_docs:`1.0.2 Documentation </1.0.2>`
-
-****************************
-Release Series 0.9 (laverne)
-****************************
-
-- :yocto_docs:`0.9 Documentation </0.9>`
diff --git a/documentation/set_versions.py b/documentation/set_versions.py
index a7ceb3455..803d3e4b4 100755
--- a/documentation/set_versions.py
+++ b/documentation/set_versions.py
@@ -14,6 +14,7 @@  import collections
 import sys
 import os
 import itertools
+import re
 
 ourversion = None
 if len(sys.argv) == 2:
@@ -231,3 +232,77 @@  with open("sphinx-static/switchers.js.in", "r") as r, open("sphinx-static/switch
 
 print("switchers.js generated from switchers.js.in")
 
+# generate releases.rst
+
+# list missing tags in yocto-docs
+missing_tags = [
+        'yocto-0.9',
+        'yocto-1.0', 'yocto-1.0.1',
+        'yocto-1.1', 'yocto-1.1.1',
+        'yocto-1.2',
+        'yocto-1.4.4', 'yocto-1.4.5',
+        'yocto-1.5', 'yocto-1.5.2', 'yocto-1.5.3', 'yocto-1.5.4',
+        'yocto-1.6', 'yocto-1.6.1', 'yocto-1.6.2',
+        'yocto-1.7', 'yocto-1.7.1',
+        'yocto-1.9',
+        'yocto-2.5.3',
+        'yocto-3.1', 'yocto-3.1.1', 'yocto-3.1.2', 'yocto-3.1.3',
+        ]
+
+semver = re.compile(r'yocto-(\d+)\.(\d+)(?:\.)?(\d*)')
+
+# git is able to properly order semver versions but not python
+# instead of adding a dependency on semver module, let's convert the version
+# into a decimal number, e.g. 11.23.1 will be 112301 and 1.5 will be 010500 so
+# it can be used as a key for the sorting algorithm.
+# This can be removed once all the old tags are re-created.
+def tag_to_semver_like(v):
+    v_semver = semver.search(v)
+    v_maj, v_min, v_patch = v_semver.groups('0')
+    return int("{:0>2}{:0>2}{:0>2}".format(v_maj, v_min, v_patch), 10)
+
+yocto_tags = subprocess.run(["git", "tag", "--list", "--sort=version:refname", "yocto-*"], capture_output=True, text=True).stdout
+yocto_tags = sorted(yocto_tags.split() + missing_tags, key=tag_to_semver_like)
+tags = [tag[6:] for tag in yocto_tags]
+
+with open('releases.rst', 'w') as f:
+    f.write('===========================\n')
+    f.write(' Supported Release Manuals \n')
+    f.write('===========================\n')
+    f.write('\n')
+
+    for activerelease in activereleases:
+        title = "Release Series %s (%s)" % (release_series[activerelease], activerelease)
+        f.write('*' * len(title) + '\n')
+        f.write(title + '\n')
+        f.write('*' * len(title) + '\n')
+        f.write('\n')
+
+        for tag in tags:
+            if tag == release_series[activerelease] or tag.startswith('%s.' % release_series[activerelease]):
+                f.write('- :yocto_docs:`%s Documentation </%s>`\n' % (tag, tag))
+        f.write('\n')
+
+    f.write('==========================\n')
+    f.write(' Outdated Release Manuals \n')
+    f.write('==========================\n')
+    f.write('\n')
+
+    for series in release_series:
+        if series == devbranch or series in activereleases:
+            continue
+
+        if series == "jethro-pre":
+            continue
+
+        title = "Release Series %s (%s)" % (release_series[series], series)
+        f.write('*' * len(title) + '\n')
+        f.write(title + '\n')
+        f.write('*' * len(title) + '\n')
+        f.write('\n')
+        if series == "jethro":
+            f.write('- :yocto_docs:`1.9 Documentation </1.9>`\n')
+        for tag in tags:
+            if tag == release_series[series] or tag.startswith('%s.' % release_series[series]):
+                f.write('- :yocto_docs:`%s Documentation </%s>`\n' % (tag, tag))
+        f.write('\n')