Push to atr 4.0.x

.github/ci-extensions.xml

@@ -20,7 +20,7 @@ under the License.
 <extensions>
   <extension>
     <groupId>eu.maveniverse.maven.mimir</groupId>
-    <artifactId>extension</artifactId>
-    <version>0.7.8</version>
+    <artifactId>extension3</artifactId>
+    <version>${env.MIMIR_VERSION}</version>
   </extension>
 </extensions>

.github/ci-mimir-daemon.properties

@@ -15,7 +15,9 @@
 #  limitations under the License.
 #
 
-# Mimir Daemon properties
+# Mimir Daemon config properties
 
-# Disable JGroups; we don't want/use LAN cache sharing
-mimir.jgroups.enabled=false
+# Pre-seed itself
+mimir.daemon.preSeedItself=true
+mimir.file.exclusiveAccess=true
+mimir.file.cachePurge=ON_BEGIN

.github/ci-mimir-session.properties

@@ -0,0 +1,23 @@
+#
+#  Licensed to the Apache Software Foundation (ASF) under one or more
+#  contributor license agreements.  See the NOTICE file distributed with
+#  this work for additional information regarding copyright ownership.
+#  The ASF licenses this file to You under the Apache License, Version 2.0
+#  (the "License"); you may not use this file except in compliance with
+#  the License.  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+# Mimir Session config properties
+
+# do not waste time on this; we maintain the version
+mimir.daemon.autoupdate=false
+# CI uses US Mirror
+mimir.session.mirrors=central(https://maven-central.storage-download.googleapis.com/maven2/)