jaykay12 commented on code in PR #5018:
URL: https://github.com/apache/solr/pull/5018#discussion_r4177011284


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solr/core/src/java/org/apache/solr/packagemanager/UserIO.java:
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@@ -0,0 +1,35 @@
+/*
+ * 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.
+ */
+
+package org.apache.solr.packagemanager;
+
+/** Console-facing output for package manager operations */
+@FunctionalInterface
+public interface UserIO {

Review Comment:
   **Disclaimer** - Reply via Cursor
   
   > Packagemanager uses UserIO directly; it doesn’t implement console output.
   
   > PackageManager / RepositoryManager take a UserIO and call print / 
printSuccess / printError. PackageUtils uses the color constants on the 
interface. That is how we dropped the CLI dependency.
   
   > Implementations:
   
   > CLI: ToolRuntime (passed in from PackageTool)
   tests: UserIO.NONE
   There is no production core path that constructs PackageManager outside the 
CLI, so core doesn’t need its own console impl.



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