| /* |
| * Copyright (C) 2017, 2021 Markus Duft <markus.duft@ssi-schaefer.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.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.FULL_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; |
| } |
| |
| } |