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- /*
- * Copyright (C) 2016, Christian Halstrick <christian.halstrick@sap.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.OutputStream;
- import java.nio.file.Files;
- import java.nio.file.Path;
-
- import org.eclipse.jgit.attributes.FilterCommand;
- import org.eclipse.jgit.attributes.FilterCommandFactory;
- import org.eclipse.jgit.attributes.FilterCommandRegistry;
- import org.eclipse.jgit.lfs.lib.Constants;
- import org.eclipse.jgit.lib.Repository;
-
- /**
- * Built-in LFS smudge filter
- *
- * When content is read from git's object-database and written to the filesystem
- * and this filter is configured for that content, then this filter will replace
- * the content of LFS pointer files with the original content. This happens e.g.
- * when a checkout needs to update a working tree file which is under LFS
- * control. This implementation expects that the origin content is already
- * available in the .git/lfs/objects folder. This implementation will not
- * contact any LFS servers in order to get the missing content.
- *
- * @since 4.6
- */
- public class SmudgeFilter extends FilterCommand {
- /**
- * The factory is responsible for creating instances of {@link SmudgeFilter}
- */
- public final static FilterCommandFactory FACTORY = new FilterCommandFactory() {
- @Override
- public FilterCommand create(Repository db, InputStream in,
- OutputStream out) throws IOException {
- return new SmudgeFilter(db, in, out);
- }
- };
-
- /**
- * Registers this filter in JGit by calling
- */
- public final static void register() {
- FilterCommandRegistry.register(
- org.eclipse.jgit.lib.Constants.BUILTIN_FILTER_PREFIX
- + "lfs/smudge", //$NON-NLS-1$
- FACTORY);
- }
-
- private Lfs lfs;
-
- /**
- * @param db
- * @param in
- * @param out
- * @throws IOException
- */
- public SmudgeFilter(Repository db, InputStream in, OutputStream out)
- throws IOException {
- super(in, out);
- lfs = new Lfs(db.getDirectory().toPath().resolve(Constants.LFS));
- LfsPointer res = LfsPointer.parseLfsPointer(in);
- if (res != null) {
- Path mediaFile = lfs.getMediaFile(res.getOid());
- if (Files.exists(mediaFile)) {
- this.in = Files.newInputStream(mediaFile);
- }
- }
- }
-
- @Override
- public int run() throws IOException {
- int b;
- if (in != null) {
- while ((b = in.read()) != -1) {
- out.write(b);
- }
- in.close();
- }
- out.close();
- return -1;
- }
- }
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