Autorelease: Abort if a dummy release exists (#43660)

* Abort if a dummy release exists

* Look for a tag instead of a release

* Allow workflow_dispatch

* Use a more relevant tag

* Dummy → Kill switch

* Use more precise tag name check

* Add notice for GH Actions to pick up

Co-authored-by: Brad Jorsch <anomiex@users.noreply.github.com>

---------

Co-authored-by: Brad Jorsch <anomiex@users.noreply.github.com>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/15310222846

Upstream-Ref: Automattic/jetpack@101a8bc

Author: tbradsha

.github/files/autorelease.sh

@@ -40,6 +40,14 @@ else
 	exit 1
 fi
 
+# Don't auto-release if there's a kill switch tag in place.
+kill_switch_tag_name='autorelease_kill_switch'
+kill_switch_tag=$( git ls-remote --tags origin "$kill_switch_tag_name" )
+if [[ -n "$kill_switch_tag" ]]; then
+	echo "::notice::Kill switch tag found ('$kill_switch_tag_name'); aborting auto-release."
+	exit 0
+fi
+
 echo "Creating release for $TAG"
 
 ## Determine slug and title format.
@@ -119,7 +127,7 @@ fi
 if [[ -n "$ROLLING_MODE" ]]; then
 	echo "::group::Deleting stale rolling release"
 
-	for R in $( gh release list --limit 100 --json tagName --jq '.[].tagName | select( contains( "rolling" ) )' ); do
+	for R in $( gh release list --limit 100 --json tagName --jq '.[].tagName | select( contains( "+rolling" ) )' ); do
 		echo "Found $R, deleting"
 		gh release delete "$R" --cleanup-tag --yes
 	done

.github/workflows/autorelease.yml

@@ -11,6 +11,7 @@ on:
       - 'v?[0-9]+.[0-9]+.[0-9]+.[0-9]+-*'
     branches:
       - 'trunk'
+  workflow_dispatch:
 
 jobs:
   publish: