[MSHARED-978] add 'quiet' flag

Allow for using the -q (--quiet) flag in Maven invocations

Closes #6

Author: hakr-ur

src/main/java/org/apache/maven/shared/invoker/DefaultInvocationRequest.java

@@ -105,6 +105,8 @@ public class DefaultInvocationRequest
 
     private int timeoutInSeconds = NO_TIMEOUT;
 
+    private boolean quiet;
+
     public File getBaseDirectory()
     {
         return basedir;
@@ -597,4 +599,21 @@ public void setTimeoutInSeconds( int timeoutInSeconds )
     {
         this.timeoutInSeconds = timeoutInSeconds;
     }
+
+    /**
+     * {@inheritDoc}
+     */
+    public boolean isQuiet()
+    {
+        return quiet;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public InvocationRequest setQuiet( boolean quiet )
+    {
+        this.quiet = quiet;
+        return this;
+    }
 }

src/main/java/org/apache/maven/shared/invoker/InvocationRequest.java

@@ -310,6 +310,14 @@ public interface InvocationRequest
      */
     String getThreads();
 
+    /**
+     * Gets the quiet mode of the Maven invocation. By default, Maven is executed in normal mode.
+     *
+     * @return <code>true</code> if Maven should be executed in quiet mode, <code>false</code> if normal mode should
+     *         be used.
+     */
+    boolean isQuiet();
+
     // ----------------------------------------------------------------------
     // Reactor Failure Mode
     // ----------------------------------------------------------------------
@@ -717,6 +725,15 @@ enum CheckSumPolicy
      */
     InvocationRequest setBuilder( String id );
 
+    /**
+     * Sets the quiet mode of the Maven invocation. Equivalent of {@code -q} and {@code --quiet}
+     *
+     * @param quiet <code>true</code> if Maven should be executed in quiet mode, <code>false</code> if the normal mode
+     *            should be used.
+     * @return This invocation request.
+     */
+    InvocationRequest setQuiet( boolean quiet );
+
     /**
      * Get the current set builder strategy id equivalent of {@code --builder id}. <b>Note. This is available since
      * Maven 3.2.1</b>

src/main/java/org/apache/maven/shared/invoker/MavenCommandLineBuilder.java

@@ -501,6 +501,11 @@ else if ( CheckSumPolicy.Warn.equals( checksumPolicy ) )
         {
             cli.createArg().setValue( request.getBuilder() );
         }
+
+        if ( request.isQuiet() )
+        {
+            cli.createArg().setValue( "-q" );
+        }
     }
 
     protected void setThreads( InvocationRequest request, Commandline cli )

src/test/java/org/apache/maven/shared/invoker/MavenCommandLineBuilderTest.java

@@ -312,6 +312,15 @@ public void testShouldSetErrorFlagFromRequest()
         assertArgumentsPresent( cli, Collections.singleton( "-e" ) );
     }
 
+    @Test
+    public void testShouldSetQuietFlagFromRequest()
+    {
+
+        tcb.setFlags( newRequest().setQuiet( true ), cli );
+
+        assertArgumentsPresent( cli, Collections.singleton( "-q" ));
+    }
+
     @Test
     public void testDebugOptionShouldMaskShowErrorsOption()
     {