/*
* Copyright (C) 2010, Chris Aniszczyk <caniszczyk@gmail.com>
* 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.api;
import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import org.eclipse.jgit.JGitText;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.NoFilepatternException;
import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.dircache.DirCacheBuildIterator;
import org.eclipse.jgit.dircache.DirCacheBuilder;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
/**
* A class used to execute a {@code Rm} command. It has setters for all
* supported options and arguments of this command and a {@link #call()} method
* to finally execute the command. Each instance of this class should only be
* used for one invocation of the command (means: one call to {@link #call()})
*
* @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-rm.html"
* >Git documentation about Rm</a>
*/
public class RmCommand extends GitCommand<DirCache> {
private Collection<String> filepatterns;
/**
*
* @param repo
*/
public RmCommand(Repository repo) {
super(repo);
filepatterns = new LinkedList<String>();
}
/**
* @param filepattern
* File to remove.
* @return {@code this}
*/
public RmCommand addFilepattern(String filepattern) {
checkCallable();
filepatterns.add(filepattern);
return this;
}
/**
* Executes the {@code Rm} command. Each instance of this class should only
* be used for one invocation of the command. Don't call this method twice
* on an instance.
*
* @return the DirCache after Rm
*/
public DirCache call() throws NoFilepatternException {
if (filepatterns.isEmpty())
throw new NoFilepatternException(JGitText.get().atLeastOnePatternIsRequired);
checkCallable();
DirCache dc = null;
try {
dc = repo.lockDirCache();
DirCacheBuilder builder = dc.builder();
final TreeWalk tw = new TreeWalk(repo);
tw.reset(); // drop the first empty tree, which we do not need here
tw.setRecursive(true);
tw.setFilter(PathFilterGroup.createFromStrings(filepatterns));
tw.addTree(new DirCacheBuildIterator(builder));
while (tw.next()) {
final File path = new File(repo.getWorkTree(),
tw.getPathString());
final FileMode mode = tw.getFileMode(0);
if (mode.getObjectType() == Constants.OBJ_BLOB) {
// Deleting a blob is simply a matter of removing
// the file or symlink named by the tree entry.
delete(path);
}
}
builder.commit();
setCallable(false);
} catch (IOException e) {
throw new JGitInternalException(
JGitText.get().exceptionCaughtDuringExecutionOfRmCommand, e);
} finally {
if (dc != null)
dc.unlock();
}
return dc;
}
private void delete(File p) {
while (p != null && !p.equals(repo.getWorkTree()) && p.delete())
p = p.getParentFile();
}
}