| /* |
| * 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; |
| } |
| |
| } |