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/*
* Copyright (C) 2009, Christian Halstrick <christian.halstrick@sap.com>
* Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
* Copyright (C) 2009, Google Inc.
* Copyright (C) 2007-2009, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2006, Shawn O. Pearce <spearce@spearce.org>
* 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.lib;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* Utility class to work with reflog files
*
* @author Dave Watson
*/
public class RefLogWriter {
static void append(final RefUpdate u, final String msg) throws IOException {
final ObjectId oldId = u.getOldObjectId();
final ObjectId newId = u.getNewObjectId();
final Repository db = u.getRepository();
final PersonIdent ident = u.getRefLogIdent();
appendOneRecord(oldId, newId, ident, msg, db, u.getName());
if (!u.getName().equals(u.getOrigName()))
appendOneRecord(oldId, newId, ident, msg, db, u.getOrigName());
}
static void append(RefRename refRename, String logName, String msg) throws IOException {
final ObjectId id = refRename.getObjectId();
final Repository db = refRename.getRepository();
final PersonIdent ident = refRename.getRefLogIdent();
appendOneRecord(id, id, ident, msg, db, logName);
}
static void renameTo(final Repository db, final RefUpdate from,
final RefUpdate to) throws IOException {
final File logdir = new File(db.getDirectory(), Constants.LOGS);
final File reflogFrom = new File(logdir, from.getName());
if (!reflogFrom.exists())
return;
final File reflogTo = new File(logdir, to.getName());
final File reflogToDir = reflogTo.getParentFile();
File tmp = new File(logdir, "tmp-renamed-log.." + Thread.currentThread().getId());
if (!reflogFrom.renameTo(tmp)) {
throw new IOException("Cannot rename " + reflogFrom + " to (" + tmp
+ ")" + reflogTo);
}
RefUpdate.deleteEmptyDir(reflogFrom, RefUpdate.count(from.getName(),
'/'));
if (!reflogToDir.exists() && !reflogToDir.mkdirs()) {
throw new IOException("Cannot create directory " + reflogToDir);
}
if (!tmp.renameTo(reflogTo)) {
throw new IOException("Cannot rename (" + tmp + ")" + reflogFrom
+ " to " + reflogTo);
}
}
private static void appendOneRecord(final ObjectId oldId,
final ObjectId newId, PersonIdent ident, final String msg,
final Repository db, final String refName) throws IOException {
if (ident == null)
ident = new PersonIdent(db);
else
ident = new PersonIdent(ident);
final StringBuilder r = new StringBuilder();
r.append(ObjectId.toString(oldId));
r.append(' ');
r.append(ObjectId.toString(newId));
r.append(' ');
r.append(ident.toExternalString());
r.append('\t');
r.append(msg);
r.append('\n');
final byte[] rec = Constants.encode(r.toString());
final File logdir = new File(db.getDirectory(), Constants.LOGS);
final File reflog = new File(logdir, refName);
if (reflog.exists() || db.getConfig().getCore().isLogAllRefUpdates()) {
final File refdir = reflog.getParentFile();
if (!refdir.exists() && !refdir.mkdirs())
throw new IOException("Cannot create directory " + refdir);
final FileOutputStream out = new FileOutputStream(reflog, true);
try {
out.write(rec);
} finally {
out.close();
}
}
}
/**
* Writes reflog entry for ref specified by refName
*
* @param repo
* repository to use
* @param oldCommit
* previous commit
* @param commit
* new commit
* @param message
* reflog message
* @param refName
* full ref name
* @throws IOException
* @deprecated rely upon {@link RefUpdate}'s automatic logging instead.
*/
public static void writeReflog(Repository repo, ObjectId oldCommit,
ObjectId commit, String message, String refName) throws IOException {
appendOneRecord(oldCommit, commit, null, message, repo, refName);
}
}
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