Initial version

.clasp.json

@@ -0,0 +1 @@
+{"scriptId":"1vTgZT2m51WMyO8e_3muHlzLhrrRoqiNdU9BcJn7-05aKhIpJgnKXt4VN"}

Code.js

@@ -0,0 +1,22 @@
+// Apps Scripts may only run for ~5m so we limit the execution
+const MAX_DELETE_PER_LOOP = 1000
+
+function cleanup() {
+  trashByQuery("label:newsletter older_than:6m")
+}
+
+function trashByQuery(query) {
+  var threads = []
+  var removedThreads = 0
+  
+  do {
+    threads = GmailApp.search(query)
+    for (var i = 0; i < threads.length; i++) {
+      var thread = threads[i]
+      thread.moveToTrash()
+      removedThreads++
+    }
+  } while (threads.length > 0 && removedThreads < MAX_DELETE_PER_LOOP)
+    
+  Logger.log('Removed %s threads for query "%s"', removedThreads, query)
+}

appsscript.json

@@ -0,0 +1,6 @@
+{
+  "timeZone": "Europe/Paris",
+  "dependencies": {
+  },
+  "exceptionLogging": "STACKDRIVER"
+}