1 /* 2 * Copyright (C) 2008, Google Inc. 3 * and other copyright owners as documented in the project's IP log. 4 * 5 * This program and the accompanying materials are made available 6 * under the terms of the Eclipse Distribution License v1.0 which 7 * accompanies this distribution, is reproduced below, and is 8 * available at http://www.eclipse.org/org/documents/edl-v10.php 9 * 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials provided 22 * with the distribution. 23 * 24 * - Neither the name of the Eclipse Foundation, Inc. nor the 25 * names of its contributors may be used to endorse or promote 26 * products derived from this software without specific prior 27 * written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 package org.eclipse.jgit.pgm; 45 46 import java.io.IOException; 47 import java.io.InputStream; 48 import java.net.URL; 49 import java.net.URLClassLoader; 50 import java.text.MessageFormat; 51 import java.util.jar.JarFile; 52 import java.util.jar.Manifest; 53 54 import org.eclipse.jgit.pgm.internal.CLIText; 55 56 @Command(common = true, usage = "usage_DisplayTheVersionOfJgit") 57 class Version extends TextBuiltin { 58 /** {@inheritDoc} */ 59 @Override 60 protected void run() { 61 // read the Implementation-Version from Manifest 62 String version = getImplementationVersion(); 63 64 // if Implementation-Version is not available then try reading 65 // Bundle-Version 66 if (version == null) { 67 version = getBundleVersion(); 68 } 69 70 // if both Implementation-Version and Bundle-Version are not available 71 // then throw an exception 72 if (version == null) { 73 throw die(CLIText.get().cannotReadPackageInformation); 74 } 75 76 try { 77 outw.println( 78 MessageFormat.format(CLIText.get().jgitVersion, version)); 79 } catch (IOException e) { 80 throw die(e.getMessage(), e); 81 } 82 } 83 84 /** {@inheritDoc} */ 85 @Override 86 protected final boolean requiresRepository() { 87 return false; 88 } 89 90 private String getImplementationVersion() { 91 Package pkg = getClass().getPackage(); 92 return (pkg == null) ? null : pkg.getImplementationVersion(); 93 } 94 95 private String getBundleVersion() { 96 ClassLoader cl = getClass().getClassLoader(); 97 if (cl instanceof URLClassLoader) { 98 URL url = ((URLClassLoader) cl).findResource(JarFile.MANIFEST_NAME); 99 if (url != null) 100 return getBundleVersion(url); 101 } 102 return null; 103 } 104 105 private static String getBundleVersion(URL url) { 106 try (InputStream is = url.openStream()) { 107 Manifest manifest = new Manifest(is); 108 return manifest.getMainAttributes().getValue("Bundle-Version"); //$NON-NLS-1$ 109 } catch (IOException e) { 110 // do nothing - will return null 111 } 112 return null; 113 } 114 }