Fixes #3656 - Add help command to CLI (#3657)

cli/src/main/java/cloud/piranha/cli/Cli.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2002-2024 Manorrock.com. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package cloud.piranha.cli;
+
+/**
+ * The Piranha CLI.
+ * 
+ * @author Manfred Riem (mriem@manorrock.com)
+ */
+public class Cli {
+
+ /**
+ * Stores the arguments.
+ */
+ private String[] arguments;
+
+ /**
+ * Main method.
+ * 
+ * @param arguments the command-line arguments.
+ */
+ public static void main(String[] arguments) {
+ Cli cli = new Cli();
+ cli.arguments = arguments;
+ cli.run();
+ }
+
+ /**
+ * Run method.
+ */
+ public void run() {
+ if (arguments.length == 0 || arguments[0].equals("help")) {
+ usage();
+ }
+ }
+
+ /**
+ * Set the command-line arguments.
+ * 
+ * @param arguments the command-line arguments.
+ */
+ public void setArguments(String[] arguments) {
+ this.arguments = arguments;
+ }
+
+ /**
+ * Show the help.
+ */
+ private void usage() {
+ System.out.println();
+ System.out.println("usage: piranha [command]");
+ System.out.println();
+ System.out.println("Available commands:");
+ System.out.println();
+ System.out.println(" help : Show help");
+ System.out.println();
+ }
+}