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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.nio.file.Files;
- import java.nio.file.Path;
-
- import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
- import org.eclipse.jgit.lib.ObjectLoader;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.util.TemporaryBuffer;
- import org.eclipse.jgit.util.TemporaryBuffer.LocalFile;
-
- /**
- * Provides transparently either a stream to the blob or a LFS media file if
- * managed by LFS.
- *
- * @since 4.11
- */
- public class LfsBlobFilter {
-
- /**
- * In case the given {@link ObjectLoader} points to a LFS pointer file
- * replace the loader with one pointing to the LFS media file contents.
- * Missing LFS files are downloaded on the fly - same logic as the smudge
- * filter.
- *
- * @param db
- * the repo
- * @param loader
- * the loader for the blob
- * @return either the original loader, or a loader for the LFS media file if
- * managed by LFS. Files are downloaded on demand if required.
- * @throws IOException
- * in case of an error
- */
- public static ObjectLoader smudgeLfsBlob(Repository db, ObjectLoader loader)
- throws IOException {
- if (loader.getSize() > LfsPointer.SIZE_THRESHOLD) {
- return loader;
- }
-
- try (InputStream is = loader.openStream()) {
- LfsPointer ptr = LfsPointer.parseLfsPointer(is);
- if (ptr != null) {
- Lfs lfs = new Lfs(db);
- AnyLongObjectId oid = ptr.getOid();
- Path mediaFile = lfs.getMediaFile(oid);
- if (!Files.exists(mediaFile)) {
- SmudgeFilter.downloadLfsResource(lfs, db, ptr);
- }
-
- return new LfsBlobLoader(mediaFile);
- }
- }
-
- return loader;
- }
-
- /**
- * Run the LFS clean filter on the given stream and return a stream to the
- * LFS pointer file buffer. Used when inserting objects.
- *
- * @param db
- * the {@link Repository}
- * @param originalContent
- * the {@link InputStream} to the original content
- * @return a {@link TemporaryBuffer} representing the LFS pointer. The
- * caller is responsible to destroy the buffer.
- * @throws IOException
- * in case of any error.
- */
- public static TemporaryBuffer cleanLfsBlob(Repository db,
- InputStream originalContent) throws IOException {
- LocalFile buffer = new TemporaryBuffer.LocalFile(null);
- CleanFilter f = new CleanFilter(db, originalContent, buffer);
- try {
- while (f.run() != -1) {
- // loop as long as f.run() tells there is work to do
- }
- } catch (IOException e) {
- buffer.destroy();
- throw e;
- }
- return buffer;
- }
-
- }
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