bots/bridgekeeper/src/main/java/org/openjdk/skara/bots/bridgekeeper/PullRequestPrunerBot.java

@@ -70,20 +70,35 @@
              unit += "s";
          }
          return count + " " + unit;
      }
  
+     private final String noticeMarker = "<!-- PullrequestCloserBot auto close notification -->";
+ 
      @Override
      public void run(Path scratchPath) {
-         var message = "@" + pr.author().userName() + " This pull request has been inactive for more than " +
-                 formatDuration(maxAge) + " and will be automatically closed. If you think this is incorrect, " +
-                 "feel free to reopen it!";
+         var comments = pr.comments();
+         if (comments.size() > 0) {
+             var lastComment = comments.get(comments.size() - 1);
+             if (lastComment.author().equals(repository.forge().currentUser()) && lastComment.body().contains(noticeMarker)) {
+                 var message = "@" + pr.author().userName() + " This pull request has been inactive for more than " +
+                         formatDuration(maxAge.multipliedBy(2)) + " and will now be automatically closed. If you would " +
+                         "like to continue working on this pull request in the future, feel free to reopen it!";
+                 log.fine("Posting prune message");
+                 pr.addComment(message);
+                 pr.setState(PullRequest.State.CLOSED);
+                 return;
+             }
+         }
  
-         log.fine("Posting prune message");
-         pr.addComment(message);
+         var message = "@" + pr.author().userName() + " This pull request has been inactive for more than " +
+                 formatDuration(maxAge) + " and will be automatically closed if another " + formatDuration(maxAge) +
+                 " passes without any activity. To avoid this, simply add a new comment to the pull request. Feel free " +
+                 "to ask for assistance if you need help with progressing this pull request towards integration!";
  
-         pr.setState(PullRequest.State.CLOSED);
+         log.fine("Posting prune notification message");
+         pr.addComment(noticeMarker + "\n\n" + message);
      }
  }
  
  public class PullRequestPrunerBot implements Bot {
      private final HostedRepository repository;