[MNG-7032] Evaluate --help and --version after configuring the logging/color

maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java

@@ -166,6 +166,8 @@ public class MavenCli
 
     private Map<String, ConfigurationProcessor> configurationProcessors;
 
+    private CLIManager cliManager;
+
     public MavenCli()
     {
         this( null );
@@ -278,6 +280,7 @@ public class MavenCli
             cli( cliRequest );
             properties( cliRequest );
             logging( cliRequest );
+            informativeCommands( cliRequest );
             version( cliRequest );
             localContainer = container( cliRequest );
             commands( cliRequest );
@@ -367,7 +370,7 @@ public class MavenCli
         //
         slf4jLogger = new Slf4jStdoutLogger();
 
-        CLIManager cliManager = new CLIManager();
+        cliManager = new CLIManager();
 
         List<String> args = new ArrayList<>();
         CommandLine mavenConfig = null;
@@ -417,7 +420,10 @@ public class MavenCli
             cliManager.displayHelp( System.out );
             throw e;
         }
+    }
 
+    private void informativeCommands( CliRequest cliRequest ) throws ExitException
+    {
         if ( cliRequest.commandLine.hasOption( CLIManager.HELP ) )
         {
             cliManager.displayHelp( System.out );

maven-embedder/src/test/java/org/apache/maven/cli/MavenCliTest.java

@@ -29,7 +29,12 @@ import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 
+import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.List;
 
 import org.apache.commons.cli.ParseException;
 import org.apache.maven.Maven;
@@ -331,4 +336,36 @@ public class MavenCliTest
         orderdEventSpyDispatcherMock.verify(eventSpyDispatcherMock, times(1)).onEvent(any(ToolchainsBuildingResult.class));
     }
 
+    /**
+     * MNG-7032: Disable colours for {@code --version} if {@code --batch-mode} is also given.
+     * @throws Exception cli invocation.
+     */
+    @Test
+    public void testVersionStringWithoutAnsi() throws Exception
+    {
+        // given
+        // - request with version and batch mode
+        CliRequest cliRequest = new CliRequest( new String[] {
+                "--version",
+                "--batch-mode"
+        }, null );
+        ByteArrayOutputStream systemOut = new ByteArrayOutputStream();
+        PrintStream oldOut = System.out;
+        System.setOut( new PrintStream( systemOut ) );
+
+        // when
+        try {
+            cli.cli( cliRequest );
+        } catch ( MavenCli.ExitException exitException ) {
+            // expected
+        } finally {
+            // restore sysout
+            System.setOut( oldOut );
+        }
+        String versionOut = new String( systemOut.toByteArray(), StandardCharsets.UTF_8 );
+
+        // then
+        assertEquals( MessageUtils.stripAnsiCodes( versionOut ), versionOut );
+    }
+
 }