add minimal option mvn option completer

mvnsh-commands/mvnsh-maven/src/main/java/com/planet57/maven/shell/commands/maven/MavenAction.java

@@ -51,12 +51,14 @@ public class MavenAction
     implements OpaqueArguments
 {
   @Inject
-  public void installCompleters(@Named("maven-phase") final Completer c1,
-                                @Named("maven-plugin") final Completer c2)
+  public void installCompleters(@Named("maven-option") final Completer c1,
+                                @Named("maven-phase") final Completer c2,
+                                @Named("maven-plugin") final Completer c3)
   {
     checkNotNull(c1);
     checkNotNull(c2);
-    setCompleters(new AggregateCompleter(c1, c2));
+    checkNotNull(c3);
+    setCompleters(new AggregateCompleter(c1, c2, c3));
   }
 
   @Override

mvnsh-commands/mvnsh-maven/src/main/java/com/planet57/maven/shell/commands/maven/MavenOptionCompleter.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2009-present the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Apache License v2.0 which accompanies this distribution.
+ *
+ * The Eclipse Public License is available at
+ *   http://www.eclipse.org/legal/epl-v10.html
+ *
+ * The Apache License v2.0 is available at
+ *   http://www.apache.org/licenses/LICENSE-2.0.html
+ *
+ * You may elect to redistribute this code under either of these licenses.
+ */
+
+package com.planet57.maven.shell.commands.maven;
+
+import java.util.List;
+
+import javax.inject.Named;
+import javax.inject.Singleton;
+
+import org.jline.reader.Candidate;
+import org.jline.reader.Completer;
+import org.jline.reader.LineReader;
+import org.jline.reader.ParsedLine;
+
+import com.planet57.gshell.util.jline.StringsCompleter2;
+
+/**
+ * Maven option completer.
+ *
+ * @since 3.0
+ */
+@Named("maven-option")
+@Singleton
+public class MavenOptionCompleter
+  implements Completer
+{
+  private final StringsCompleter2 delegate = new StringsCompleter2();
+
+  public MavenOptionCompleter() {
+    delegate.addAll(
+      "-am", "--also-make",
+      "-B", "--batch-mode",
+      "-e", "--errors",
+      "-N", "--non-recursive",
+      "-X", "--debug"
+    );
+  }
+
+  @Override
+  public void complete(final LineReader reader, final ParsedLine line, final List<Candidate> candidates) {
+    delegate.complete(reader, line, candidates);
+  }
+}