diff -urEbwBN plexus-containers-plexus-containers-2.1.0/plexus-component-metadata/src/main/java/org/codehaus/plexus/metadata/PlexusMetadataGeneratorCli.java plexus-containers-plexus-containers-2.1.0.new/plexus-component-metadata/src/main/java/org/codehaus/plexus/metadata/PlexusMetadataGeneratorCli.java
--- plexus-containers-plexus-containers-2.1.0/plexus-component-metadata/src/main/java/org/codehaus/plexus/metadata/PlexusMetadataGeneratorCli.java	1970-01-01 01:00:00.000000000 +0100
+++ plexus-containers-plexus-containers-2.1.0.new/plexus-component-metadata/src/main/java/org/codehaus/plexus/metadata/PlexusMetadataGeneratorCli.java	2019-11-22 04:47:34.934070355 +0100
@@ -0,0 +1,62 @@
+package org.codehaus.plexus.metadata;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.Option;
+import org.apache.commons.cli.Options;
+import org.codehaus.plexus.PlexusContainer;
+import org.codehaus.plexus.tools.cli.AbstractCli;
+
+public class PlexusMetadataGeneratorCli
+    extends AbstractCli
+{
+    public static final String SOURCE_DIRECTORY = "s";
+    public static final String SOURCE_ENCODING = "e";
+    public static final String CLASSES_DIRECTORY = "c";
+    public static final String OUTPUT_FILE = "o";
+    public static final String DESCRIPTORS_DIRECTORY = "m";
+
+    public static void main( String[] args )
+        throws Exception
+    {
+        new PlexusMetadataGeneratorCli().execute( args );
+    }
+
+    @Override
+    public String getPomPropertiesPath()
+    {
+        return "META-INF/maven/org.codehaus.plexus/plexus-metadata-generator/pom.properties";
+    }
+
+    @Override
+    @SuppressWarnings("static-access")
+    public Options buildCliOptions( Options options )
+    {
+        options.addOption( Option.builder( SOURCE_DIRECTORY ).longOpt( "source" ).hasArg().desc( "Source directory." ).build() );
+        options.addOption( Option.builder( SOURCE_ENCODING ).longOpt( "encoding" ).hasArg().desc( "Source file encoding." ).build() );
+        options.addOption( Option.builder( CLASSES_DIRECTORY ).longOpt( "classes" ).hasArg().desc( "Classes directory." ).build() );
+        options.addOption( Option.builder( OUTPUT_FILE ).longOpt( "output" ).hasArg().desc( "Output directory." ).build() );
+        options.addOption( Option.builder( DESCRIPTORS_DIRECTORY ).longOpt( "descriptors" ).hasArg().desc( "Descriptors directory." ).build() );
+        return options;
+    }    
+
+    public void invokePlexusComponent( CommandLine cli, PlexusContainer plexus )
+        throws Exception
+    {
+        MetadataGenerator metadataGenerator = plexus.lookup( MetadataGenerator.class );
+        
+        MetadataGenerationRequest request = new MetadataGenerationRequest();        
+        request.classesDirectory = new File( cli.getOptionValue( CLASSES_DIRECTORY ) );
+        request.classpath = Collections.emptyList();
+        request.sourceDirectories = Arrays.asList( new String[]{ new File( cli.getOptionValue( SOURCE_DIRECTORY ) ).getAbsolutePath() } );
+        request.sourceEncoding = cli.getOptionValue( SOURCE_ENCODING );
+        request.useContextClassLoader = true;
+        request.outputFile = new File( cli.getOptionValue( OUTPUT_FILE ) );
+        request.componentDescriptorDirectory = new File( cli.getOptionValue( DESCRIPTORS_DIRECTORY ) );
+        
+        metadataGenerator.generateDescriptor( request );
+    }
+}