From 961b583f9ac26ed437c0f5abb5609fe16d8e29fa Mon Sep 17 00:00:00 2001
From: "Michael B. Gale" <mbg@github.com>
Date: Fri, 24 Jul 2026 15:52:50 +0100
Subject: [PATCH] Use `rollback-changelog.ts` and remove Python version

---
 .github/workflows/rollback-release.yml        |  2 +-
 .../workflows/script/rollback_changelog.py    | 62 -------------------
 2 files changed, 1 insertion(+), 63 deletions(-)
 delete mode 100644 .github/workflows/script/rollback_changelog.py

diff --git a/.github/workflows/rollback-release.yml b/.github/workflows/rollback-release.yml
index 16680565d..c37f8a79a 100644
--- a/.github/workflows/rollback-release.yml
+++ b/.github/workflows/rollback-release.yml
@@ -93,7 +93,7 @@ jobs:
           LATEST_TAG: ${{ needs.prepare.outputs.latest_tag }}
           VERSION: "${{ needs.prepare.outputs.version }}"
         run: |
-          python .github/workflows/script/rollback_changelog.py \
+          npx tsx pr-checks/rollback-changelog.ts \
             --target-version "${ROLLBACK_TAG:1}" \
             --rollback-version "${LATEST_TAG:1}" \
             --new-version "$VERSION" > $NEW_CHANGELOG
diff --git a/.github/workflows/script/rollback_changelog.py b/.github/workflows/script/rollback_changelog.py
deleted file mode 100644
index 5e06f8345..000000000
--- a/.github/workflows/script/rollback_changelog.py
+++ /dev/null
@@ -1,62 +0,0 @@
-import datetime
-import os
-import argparse
-
-EMPTY_CHANGELOG = """# CodeQL Action Changelog
-
-"""
-
-def get_today_string():
-  today = datetime.datetime.today()
-  return '{:%d %b %Y}'.format(today)
-
-# Include everything up to and after the first heading,
-# but not the first heading and body.
-def drop_unreleased_section(lines: list[str]):
-  before_first_section = ''
-  after_first_section = ''
-  found_first_section = False
-  skipped_first_section = False
-
-  for i, line in enumerate(lines):
-    if line.startswith('## ') and not found_first_section:
-      found_first_section = True
-    elif line.startswith('## ') and found_first_section:
-      skipped_first_section = True
-
-    if not found_first_section:
-      before_first_section += line
-    if skipped_first_section:
-      after_first_section += line
-
-  return (before_first_section, after_first_section)
-
-def update_changelog(target_version, rollback_version, new_version):
-  before_first_section = EMPTY_CHANGELOG
-  after_first_section = ''
-
-  if (os.path.exists('CHANGELOG.md')):
-    with open('CHANGELOG.md', 'r') as f:
-      (before_first_section, after_first_section) = drop_unreleased_section(f.readlines())
-
-  newHeader = f'## {new_version} - {get_today_string()}\n'
-
-  print(before_first_section, end="")
-  print(newHeader)
-  print(f"This release rolls back {rollback_version} due to issues with that release. It is identical to {target_version}.\n")
-  print(after_first_section)
-
-# We expect three version strings as input:
-#
-# - target_version: the version that we are re-releasing as `new_version`
-# - rollback_version: the version that we are rolling back, typically the one that followed `target_version`
-# - new_version: the new version that we are releasing `target_version` as, typically the one that follows `rollback_version`
-#
-# Example: python3 .github/workflows/script/rollback_changelog.py --target-version "1.2.3" --rollback-version "1.2.4" --new-version "1.2.5"
-parser = argparse.ArgumentParser(description="Update CHANGELOG.md for a rollback release.")
-parser.add_argument("--target-version", "-t", required=True, help="Version to re-release as new_version.")
-parser.add_argument("--rollback-version", "-r", required=True, help="Version being rolled back.")
-parser.add_argument("--new-version", "-n", required=True, help="New version to publish for target_version.")
-args = parser.parse_args()
-
-update_changelog(args.target_version, args.rollback_version, args.new_version)