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/*
* Copyright (C) 2017, Markus Duft <markus.duft@ssi-schaefer.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.lfs;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import org.eclipse.jgit.annotations.Nullable;
import org.eclipse.jgit.attributes.Attribute;
import org.eclipse.jgit.hooks.PrePushHook;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.util.LfsFactory;
/**
* Implementation of {@link LfsFactory}, using built-in (optional) LFS support.
*
* @since 4.11
*/
public class BuiltinLFS extends LfsFactory {
private BuiltinLFS() {
SmudgeFilter.register();
CleanFilter.register();
}
/**
* Activates the built-in LFS support.
*/
public static void register() {
setInstance(new BuiltinLFS());
}
@Override
public boolean isAvailable() {
return true;
}
@Override
public ObjectLoader applySmudgeFilter(Repository db, ObjectLoader loader,
Attribute attribute) throws IOException {
if (isEnabled(db) && (attribute == null || isEnabled(db, attribute))) {
return LfsBlobFilter.smudgeLfsBlob(db, loader);
} else {
return loader;
}
}
@Override
public LfsInputStream applyCleanFilter(Repository db, InputStream input,
long length, Attribute attribute) throws IOException {
if (isEnabled(db, attribute)) {
return new LfsInputStream(LfsBlobFilter.cleanLfsBlob(db, input));
} else {
return new LfsInputStream(input, length);
}
}
@Override
public @Nullable PrePushHook getPrePushHook(Repository repo,
PrintStream outputStream) {
if (isEnabled(repo)) {
return new LfsPrePushHook(repo, outputStream);
}
return null;
}
/**
* @param db
* the repository
* @return whether LFS is requested for the given repo.
*/
@Override
public boolean isEnabled(Repository db) {
if (db == null) {
return false;
}
return db.getConfig().getBoolean(ConfigConstants.CONFIG_FILTER_SECTION,
ConfigConstants.CONFIG_SECTION_LFS,
ConfigConstants.CONFIG_KEY_USEJGITBUILTIN,
false);
}
/**
* @param db
* the repository
* @param attribute
* the attribute to check
* @return whether LFS filter is enabled for the given .gitattribute
* attribute.
*/
private boolean isEnabled(Repository db, Attribute attribute) {
if (attribute == null) {
return false;
}
return isEnabled(db) && ConfigConstants.CONFIG_SECTION_LFS
.equals(attribute.getValue());
}
@Override
public LfsInstallCommand getInstallCommand() {
return new InstallBuiltinLfsCommand();
}
}
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