/*
 * Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 * which is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 */

package io.vertx.core.impl.launcher.commands;

import io.vertx.core.cli.CLIException;
import io.vertx.core.cli.annotations.Description;
import io.vertx.core.cli.annotations.Name;
import io.vertx.core.cli.annotations.Summary;
import io.vertx.core.impl.logging.Logger;
import io.vertx.core.impl.logging.LoggerFactory;
import io.vertx.core.spi.launcher.DefaultCommand;

import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;

Comment to display the vert.x (core) version.
Author:Clement Escoffier
/** * Comment to display the vert.x (core) version. * * @author Clement Escoffier <clement@apache.org> */
@Name("version") @Summary("Displays the version.") @Description("Prints the vert.x core version used by the application.") public class VersionCommand extends DefaultCommand { private static final Logger log = LoggerFactory.getLogger(VersionCommand.class); private static String version; @Override public void run() throws CLIException { log.info(getVersion()); }
Reads the version from the vertx-version.txt file.
Returns:the version
/** * Reads the version from the {@code vertx-version.txt} file. * * @return the version */
public static String getVersion() { if (version != null) { return version; } try (InputStream is = VersionCommand.class.getClassLoader().getResourceAsStream("META-INF/vertx/vertx-version.txt")) { if (is == null) { throw new IllegalStateException("Cannot find vertx-version.txt on classpath"); } try (Scanner scanner = new Scanner(is, "UTF-8").useDelimiter("\\A")) { return version = scanner.hasNext() ? scanner.next().trim() : ""; } } catch (IOException e) { throw new IllegalStateException(e.getMessage()); } } }