Main.java

// ========================================================================
// Copyright (c) 2009-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses.
// ========================================================================

package org.eclipse.jetty.plugins;

import java.util.List;
import java.util.Map;

import org.eclipse.jetty.plugins.impl.HttpMavenServiceImpl;
import org.eclipse.jetty.plugins.impl.PluginManagerImpl;

/* ------------------------------------------------------------ */
/**
 */
public class Main {
	private static final String JETTY_HOME = "JETTY_HOME";

	private MavenService _mavenService = new HttpMavenServiceImpl();
	private PluginManager _pluginManager;
	private String _jettyHome;
	private String _installPlugin;
	private boolean _listPlugins;
	private String _repositoryUrl;
	private String _groupId;
	private String _version;

	/* ------------------------------------------------------------ */
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Main main = new Main();
		main.execute(args);
	}

	private void execute(String[] args) {
		parseEnvironmentVariables();
		parseCommandline(args);
		configureMavenService();

		_pluginManager = new PluginManagerImpl(_mavenService, _jettyHome);

		if (_listPlugins) {
			listPlugins();
		} else if (_installPlugin != null) {
			installPlugin();
		}
	}

	private void configureMavenService() {
		if (_repositoryUrl != null) {
			_mavenService.setRepositoryUrl(_repositoryUrl);
		}
		if (_groupId != null) {
			_mavenService.setGroupId(_groupId);
		}
		if (_version != null) {
			_mavenService.setVersion(_version);
		}
	}

	private void listPlugins() {
		List<String> availablePlugins = _pluginManager.listAvailablePlugins();
		for (String pluginName : availablePlugins) {
			System.out.println(pluginName);
		}
	}

	private void installPlugin() {
		_pluginManager.installPlugin(_installPlugin);
		System.out.println("Successfully installed plugin: " + _installPlugin
				+ " to " + _jettyHome);
	}

	private void parseEnvironmentVariables() {
		Map<String, String> env = System.getenv();
		if (env.containsKey(JETTY_HOME)) {
			_jettyHome = env.get(JETTY_HOME);
		}
	}

	private void parseCommandline(String[] args) {
		int i = 0;
		for (String arg : args) {
			i++;
			
			if (arg.startsWith("--jettyHome=")) {
				_jettyHome = arg.substring(12);
			}
			if (arg.startsWith("--repositoryUrl=")) {
				_repositoryUrl = arg.substring(16);
			}
			if (arg.startsWith("--groupId=")) {
				_groupId = arg.substring(10);
			}
			if (arg.startsWith("--version=")) {
				_version = arg.substring(10);
			}
			if (arg.startsWith("install")) {
				_installPlugin = args[i];
			}
			if ("list".equals(arg)) {
				_listPlugins = true;
			}
		}

		// TODO: Usage instead of throwing exceptions
		if (_jettyHome == null && _installPlugin != null)
			throw new IllegalArgumentException(
					"No --jettyHome commandline option specified and no \"JETTY_HOME\" environment variable found!");
		if (_installPlugin == null && _listPlugins == false)
			throw new IllegalArgumentException(
					"Neither install <pluginname> nor list commandline option specified. Nothing to do for me!");
		if (_installPlugin != null && _listPlugins)
			throw new IllegalArgumentException(
					"Please specify either install <pluginname> or list commandline options, but not both at the same time!");
	}

}