diff options
Diffstat (limited to 'org.eclipse.jgit/src/org/eclipse/jgit/lib/RefLogWriter.java')
| -rw-r--r-- | org.eclipse.jgit/src/org/eclipse/jgit/lib/RefLogWriter.java | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefLogWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefLogWriter.java new file mode 100644 index 0000000000..d41bbb644b --- /dev/null +++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/RefLogWriter.java @@ -0,0 +1,155 @@ +/* + * 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); + 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); + } +} |