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/*
* Copyright (C) 2010, 2012 Chris Aniszczyk <caniszczyk@gmail.com> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.api;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.jgit.api.errors.GitAPIException;
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.events.WorkingTreeModifiedEvent;
import org.eclipse.jgit.internal.JGitText;
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;
/**
* Remove files from the index and working directory (or optionally only from
* the index).
* <p>
* 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()}).
* <p>
* Examples (<code>git</code> is a {@link org.eclipse.jgit.api.Git} instance):
* <p>
* Remove file "test.txt" from both index and working directory:
*
* <pre>
* git.rm().addFilepattern("test.txt").call();
* </pre>
* <p>
* Remove file "new.txt" from the index (but not from the working directory):
*
* <pre>
* git.rm().setCached(true).addFilepattern("new.txt").call();
* </pre>
*
* @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;
/** Only remove files from index, not from working directory */
private boolean cached = false;
/**
* Constructor for RmCommand.
*
* @param repo
* the {@link org.eclipse.jgit.lib.Repository}
*/
public RmCommand(Repository repo) {
super(repo);
filepatterns = new LinkedList<>();
}
/**
* Add file name pattern of files to be removed
*
* @param filepattern
* repository-relative path of file to remove (with
* <code>/</code> as separator)
* @return {@code this}
*/
public RmCommand addFilepattern(String filepattern) {
checkCallable();
filepatterns.add(filepattern);
return this;
}
/**
* Only remove the specified files from the index.
*
* @param cached
* {@code true} if files should only be removed from index,
* {@code false} if files should also be deleted from the working
* directory
* @return {@code this}
* @since 2.2
*/
public RmCommand setCached(boolean cached) {
checkCallable();
this.cached = cached;
return this;
}
/**
* {@inheritDoc}
* <p>
* 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.
*/
@Override
public DirCache call() throws GitAPIException,
NoFilepatternException {
if (filepatterns.isEmpty())
throw new NoFilepatternException(JGitText.get().atLeastOnePatternIsRequired);
checkCallable();
DirCache dc = null;
List<String> actuallyDeletedFiles = new ArrayList<>();
try (TreeWalk tw = new TreeWalk(repo)) {
dc = repo.lockDirCache();
DirCacheBuilder builder = dc.builder();
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()) {
if (!cached) {
final FileMode mode = tw.getFileMode(0);
if (mode.getObjectType() == Constants.OBJ_BLOB) {
String relativePath = tw.getPathString();
final File path = new File(repo.getWorkTree(),
relativePath);
// Deleting a blob is simply a matter of removing
// the file or symlink named by the tree entry.
if (delete(path)) {
actuallyDeletedFiles.add(relativePath);
}
}
}
}
builder.commit();
setCallable(false);
} catch (IOException e) {
throw new JGitInternalException(
JGitText.get().exceptionCaughtDuringExecutionOfRmCommand, e);
} finally {
try {
if (dc != null) {
dc.unlock();
}
} finally {
if (!actuallyDeletedFiles.isEmpty()) {
repo.fireEvent(new WorkingTreeModifiedEvent(null,
actuallyDeletedFiles));
}
}
}
return dc;
}
private boolean delete(File p) {
boolean deleted = false;
while (p != null && !p.equals(repo.getWorkTree()) && p.delete()) {
deleted = true;
p = p.getParentFile();
}
return deleted;
}
}
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