gnodet commented on code in PR #12418:
URL: https://github.com/apache/maven/pull/12418#discussion_r3538162078


##########
impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/mvnenc/goals/Init.java:
##########
@@ -143,7 +143,20 @@ public int doExecute(EncryptContext context) throws 
Exception {
                         if (editMap.isEmpty()) {
                             throw new InterruptedException();
                         }
-                        dispatcherConfigResult.put(editable.getKey(), 
editMap.get("edit"));
+                        String userInput = editMap.get("edit").getResult();
+                        if (template.contains("$")) {
+                            String prefix = template.substring(0, 
template.indexOf('$'));
+                            if (!prefix.isEmpty() && 
!userInput.startsWith(prefix)) {
+                                userInput = prefix + userInput;
+                            }
+                        }
+                        final String finalResult = userInput;
+                        dispatcherConfigResult.put(editable.getKey(), new 
PromptResultItemIF() {
+                            @Override
+                            public String getResult() {
+                                return finalResult;
+                            }
+                        });

Review Comment:
   `PromptResultItemIF` is structurally a functional interface (single abstract 
method `getResult()`, one default method). The anonymous inner class can be 
replaced with a lambda, which also eliminates the need for the `finalResult` 
intermediate variable:
   
   ```suggestion
                           String result = userInput;
                           dispatcherConfigResult.put(editable.getKey(), () -> 
result);
   ```
   
   Same simplification applies to the `createResult()` helper in the test file.



##########
impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/mvnenc/goals/Init.java:
##########
@@ -143,7 +143,20 @@ public int doExecute(EncryptContext context) throws 
Exception {
                         if (editMap.isEmpty()) {
                             throw new InterruptedException();
                         }
-                        dispatcherConfigResult.put(editable.getKey(), 
editMap.get("edit"));
+                        String userInput = editMap.get("edit").getResult();
+                        if (template.contains("$")) {
+                            String prefix = template.substring(0, 
template.indexOf('$'));
+                            if (!prefix.isEmpty() && 
!userInput.startsWith(prefix)) {
+                                userInput = prefix + userInput;
+                            }
+                        }

Review Comment:
   This `template.contains("$")` guard is always true here — the `editables` 
list (line 127) is already filtered to entries whose result contains `$`, and 
`template` is assigned from `editable.getValue().getResult()`. The redundant 
check adds unnecessary nesting. Consider removing it:
   
   ```suggestion
                           String prefix = template.substring(0, 
template.indexOf('$'));
                           if (!prefix.isEmpty() && 
!userInput.startsWith(prefix)) {
                               userInput = prefix + userInput;
                           }
   ```



##########
impl/maven-cli/src/test/java/org/apache/maven/cling/invoker/mvnenc/goals/InitTest.java:
##########
@@ -0,0 +1,131 @@
+/*
+ * 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.maven.cling.invoker.mvnenc.goals;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.maven.api.cli.InvokerRequest;
+import org.apache.maven.api.cli.mvnenc.EncryptOptions;
+import org.apache.maven.api.services.MessageBuilderFactory;
+import org.apache.maven.cling.invoker.mvnenc.EncryptContext;
+import org.codehaus.plexus.components.secdispatcher.DispatcherMeta;
+import org.codehaus.plexus.components.secdispatcher.SecDispatcher;
+import org.codehaus.plexus.components.secdispatcher.model.Config;
+import org.codehaus.plexus.components.secdispatcher.model.ConfigProperty;
+import org.codehaus.plexus.components.secdispatcher.model.SettingsSecurity;
+import org.jline.consoleui.prompt.ConsolePrompt;
+import org.jline.consoleui.prompt.PromptResultItemIF;
+import org.jline.consoleui.prompt.builder.PromptBuilder;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedConstruction;
+import org.mockito.Mockito;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class InitTest {
+
+    @Test
+    void testPrefixPrependedToUserInput() throws Exception {
+        MessageBuilderFactory messageBuilderFactory = 
mock(MessageBuilderFactory.class, Mockito.RETURNS_DEEP_STUBS);
+        SecDispatcher secDispatcher = mock(SecDispatcher.class);
+
+        SettingsSecurity settingsSecurity = new SettingsSecurity();
+        
when(secDispatcher.readConfiguration(true)).thenReturn(settingsSecurity);
+
+        DispatcherMeta meta = mock(DispatcherMeta.class);
+        when(meta.name()).thenReturn("master");
+        DispatcherMeta.Field field = mock(DispatcherMeta.Field.class);
+        when(field.getKey()).thenReturn("password");
+        when(meta.fields()).thenReturn(Collections.singletonList(field));
+
+        
when(secDispatcher.availableDispatchers()).thenReturn(Collections.singleton(meta));
+
+        Init init = new Init(messageBuilderFactory, secDispatcher);
+
+        InvokerRequest invokerRequest = mock(InvokerRequest.class, 
Mockito.RETURNS_DEEP_STUBS);
+        when(invokerRequest.cwd()).thenReturn(java.nio.file.Paths.get(""));
+        
when(invokerRequest.installationDirectory()).thenReturn(java.nio.file.Paths.get(""));
+        
when(invokerRequest.userHomeDirectory()).thenReturn(java.nio.file.Paths.get(""));
+        
when(invokerRequest.topDirectory()).thenReturn(java.nio.file.Paths.get(""));
+        
when(invokerRequest.rootDirectory()).thenReturn(java.util.Optional.empty());
+        EncryptOptions options = mock(EncryptOptions.class);
+        EncryptContext context = new EncryptContext(invokerRequest, options);
+        // avoid null pointers for lists
+        context.header = new java.util.ArrayList<>();
+        context.style = new org.jline.utils.AttributedStyle();
+        org.jline.terminal.Terminal terminal = 
mock(org.jline.terminal.Terminal.class);
+        java.io.PrintWriter printWriter = mock(java.io.PrintWriter.class);
+        when(terminal.writer()).thenReturn(printWriter);
+        context.terminal = terminal;
+
+        try (MockedConstruction<ConsolePrompt> mockedPrompt =
+                Mockito.mockConstruction(ConsolePrompt.class, (mock, ctx) -> {
+                    PromptBuilder builderMock = mock(PromptBuilder.class, 
Mockito.RETURNS_DEEP_STUBS);
+                    when(mock.getPromptBuilder()).thenReturn(builderMock);
+
+                    Map<String, PromptResultItemIF> dispatcherResult = new 
HashMap<>();
+                    dispatcherResult.put("defaultDispatcher", 
createResult("master"));
+
+                    Map<String, PromptResultItemIF> configureResult = new 
HashMap<>();
+                    configureResult.put("password", 
createResult("env:$MVN_PASSWORD"));
+
+                    Map<String, PromptResultItemIF> editResult = new 
HashMap<>();
+                    editResult.put(
+                            "edit", createResult("my_password_var")); // User 
inputs "my_password_var" without prefix
+
+                    Map<String, PromptResultItemIF> confirmResult = new 
HashMap<>();
+                    org.jline.consoleui.prompt.ConfirmResult confirm =
+                            
mock(org.jline.consoleui.prompt.ConfirmResult.class);
+                    when(confirm.getConfirmed())
+                            
.thenReturn(org.jline.consoleui.elements.ConfirmChoice.ConfirmationValue.YES);
+                    confirmResult.put("confirm", confirm);
+
+                    when(mock.prompt(any(java.util.List.class), 
any(java.util.List.class)))
+                            .thenReturn(dispatcherResult, configureResult, 
editResult, confirmResult);
+                })) {
+            init.doExecute(context);
+        }
+
+        // Validate that the SettingsSecurity model has the prepended prefix
+        List<Config> configs = settingsSecurity.getConfigurations();
+        assertEquals(1, configs.size());
+        Config config = configs.get(0);
+        assertEquals("master", config.getName());
+        assertEquals(1, config.getProperties().size());
+        ConfigProperty prop = config.getProperties().get(0);
+        assertEquals("password", prop.getName());
+        // The expected value should be env:my_password_var because the 
template was env:$MVN_PASSWORD
+        assertEquals("env:my_password_var", prop.getValue());
+    }
+
+    private PromptResultItemIF createResult(String value) {
+        return new PromptResultItemIF() {
+            @Override

Review Comment:
   The `createResult()` helper at the bottom of this file also uses an 
anonymous inner class where a lambda would suffice:
   ```java
   private PromptResultItemIF createResult(String value) {
       return () -> value;
   }
   ```



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