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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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