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- /*
- * Copyright (C) 2008, Google Inc.
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - 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.
- *
- * - Neither the name of the Eclipse Foundation, Inc. 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 OWNER 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 org.eclipse.jgit.pgm;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URL;
- import java.net.URLClassLoader;
- import java.text.MessageFormat;
- import java.util.jar.JarFile;
- import java.util.jar.Manifest;
-
- import org.eclipse.jgit.pgm.internal.CLIText;
-
- @Command(common = true, usage = "usage_DisplayTheVersionOfJgit")
- class Version extends TextBuiltin {
- @Override
- protected void run() throws Exception {
- // read the Implementation-Version from Manifest
- String version = getImplementationVersion();
-
- // if Implementation-Version is not available then try reading
- // Bundle-Version
- if (version == null)
- version = getBundleVersion();
-
- // if both Implementation-Version and Bundle-Version are not available
- // then throw an exception
- if (version == null)
- throw die(CLIText.get().cannotReadPackageInformation);
-
- outw.println(MessageFormat.format(CLIText.get().jgitVersion, version));
- }
-
- @Override
- protected final boolean requiresRepository() {
- return false;
- }
-
- private String getImplementationVersion() {
- Package pkg = getClass().getPackage();
- return (pkg == null) ? null : pkg.getImplementationVersion();
- }
-
- private String getBundleVersion() {
- ClassLoader cl = getClass().getClassLoader();
- if (cl instanceof URLClassLoader) {
- URL url = ((URLClassLoader) cl).findResource(JarFile.MANIFEST_NAME);
- if (url != null)
- return getBundleVersion(url);
- }
- return null;
- }
-
- private static String getBundleVersion(URL url) {
- try {
- InputStream is = url.openStream();
- try {
- Manifest manifest = new Manifest(is);
- return manifest.getMainAttributes().getValue("Bundle-Version"); //$NON-NLS-1$
- } finally {
- is.close();
- }
- } catch (IOException e) {
- // do nothing - will return null
- }
- return null;
- }
- }
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