bin/gen_release_notes.py: Fix version detection for .0 release

The previous version is being calculated incorrectly, resulting in
20.0.0 deciding it's version is 19.3.x+1. This fixes that.

Fixes: 3226b12a09bbcbd25526fd6da6257057d26ddb31
       ("release: Add an update_release_calendar.py script")

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4070>

2 files changed, 15 insertions, 37 deletions

diff --git a/bin/gen_release_notes.py b/bin/gen_release_notes.py
index f104e996049..48e216f80cf 100755
--- a/bin/gen_release_notes.py
+++ b/bin/gen_release_notes.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright © 2019 Intel Corporation
+# Copyright © 2019-2020 Intel Corporation
 
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
diff --git a/bin/post_version.py b/bin/post_version.py
index 5cf5f48615e..e05d177fe59 100755
--- a/bin/post_version.py
+++ b/bin/post_version.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright © 2019 Intel Corporation
+# Copyright © 2019-2020 Intel Corporation
 
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -33,32 +33,11 @@ from lxml import (
 )
 
 
-def calculate_previous_version(version: str, is_point: bool) -> str:
-    """Calculate the previous version to compare to.
-
-    In the case of -rc to final that verison is the previous .0 release,
-    (19.3.0 in the case of 20.0.0, for example). for point releases that is
-    the last point release. This value will be the same as the input value
-    for a poiont release, but different for a major release.
-    """
-    if '-' in version:
-        version = version.split('-')[0]
-    if is_point:
-        return version
-    base = version.split('.')
-    if base[1] == '0':
-        base[0] = str(int(base[0]) - 1)
-        base[1] = '3'
-    else:
-        base[1] = str(int(base[1]) - 1)
-    return '.'.join(base)
-
-
 def is_point_release(version: str) -> bool:
     return not version.endswith('.0')
 
 
-def update_index(is_point: bool, version: str, previous_version: str) -> None:
+def update_index(is_point: bool, version: str) -> None:
     p = pathlib.Path(__file__).parent.parent / 'docs' / 'index.html'
     with p.open('rt') as f:
         tree = html.parse(f)
@@ -72,13 +51,13 @@ def update_index(is_point: bool, version: str, previous_version: str) -> None:
 
     body = etree.Element('p')
     a = etree.SubElement(
-        body, 'a', attrib={'href': f'relnotes/{previous_version}.html'})
-    a.text = f"Mesa {previous_version}"
+        body, 'a', attrib={'href': f'relnotes/{version}.html'})
+    a.text = f"Mesa {version}"
     if is_point:
         a.tail = " is released. This is a bug fix release."
     else:
         a.tail = (" is released. This is a new development release. "
-                  "See the release notes for mor information about this release.")
+                  "See the release notes for more information about this release.")
 
     root = news.getparent()
     index = root.index(news) + 1
@@ -89,14 +68,14 @@ def update_index(is_point: bool, version: str, previous_version: str) -> None:
     subprocess.run(['git', 'add', p])
 
 
-def update_release_notes(previous_version: str) -> None:
+def update_release_notes(version: str) -> None:
     p = pathlib.Path(__file__).parent.parent / 'docs' / 'relnotes.html'
     with p.open('rt') as f:
         tree = html.parse(f)
 
     li = etree.Element('li')
-    a = etree.SubElement(li, 'a', href=f'relnotes/{previous_version}.html')
-    a.text = f'{previous_version} release notes'
+    a = etree.SubElement(li, 'a', href=f'relnotes/{version}.html')
+    a.text = f'{version} release notes'
 
     ul = tree.xpath('.//ul')[0]
     ul.insert(0, li)
@@ -105,12 +84,12 @@ def update_release_notes(previous_version: str) -> None:
     subprocess.run(['git', 'add', p])
 
 
-def update_calendar(previous_version: str) -> None:
+def update_calendar(version: str) -> None:
     p = pathlib.Path(__file__).parent.parent / 'docs' / 'release-calendar.html'
     with p.open('rt') as f:
         tree = html.parse(f)
 
-    base_version = previous_version[:-2]
+    base_version = version[:-2]
 
     old = None
     new = None
@@ -145,14 +124,13 @@ def main() -> None:
     args = parser.parse_args()
 
     is_point = is_point_release(args.version)
-    previous_version = calculate_previous_version(args.version, is_point)
 
-    update_index(is_point, args.version, previous_version)
-    update_release_notes(previous_version)
-    update_calendar(previous_version)
+    update_index(is_point, args.version)
+    update_release_notes(args.version)
+    update_calendar(args.version)
     subprocess.run(['git', 'commit', '-m',
                     'docs: update calendar, add news item, and link releases '
-                    f'notes for {previous_version}'])
+                    f'notes for {args.version}'])
 
 
 if __name__ == "__main__":