123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141 |
- /*
- * Copyright (C) 2016, Christian Halstrick <christian.halstrick@sap.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.io.OutputStream;
- import java.nio.file.Files;
- import java.nio.file.Path;
- import java.nio.file.StandardCopyOption;
-
- import org.eclipse.jgit.attributes.FilterCommand;
- import org.eclipse.jgit.attributes.FilterCommandFactory;
- import org.eclipse.jgit.attributes.FilterCommandRegistry;
- import org.eclipse.jgit.lfs.errors.CorruptMediaFile;
- import org.eclipse.jgit.lfs.internal.AtomicObjectOutputStream;
- import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
- import org.eclipse.jgit.lfs.lib.Constants;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.util.FileUtils;
-
- /**
- * Built-in LFS clean filter
- *
- * When new content is about to be added to the git repository and this filter
- * is configured for that content, then this filter will replace the original
- * content with content of a so-called LFS pointer file. The pointer file
- * content will then be added to the git repository. Additionally this filter
- * writes the original content in a so-called 'media file' to '.git/lfs/objects/
- * <first-two-characters-of-contentid>/<rest-of-contentid>'
- *
- * @see <a href="https://github.com/github/git-lfs/blob/master/docs/spec.md">Git
- * LFS Specification</a>
- * @since 4.6
- */
- public class CleanFilter extends FilterCommand {
- /**
- * The factory is responsible for creating instances of
- * {@link org.eclipse.jgit.lfs.CleanFilter}
- */
- public static final FilterCommandFactory FACTORY = CleanFilter::new;
-
- /**
- * Registers this filter by calling
- * {@link FilterCommandRegistry#register(String, FilterCommandFactory)}
- */
- static void register() {
- FilterCommandRegistry
- .register(org.eclipse.jgit.lib.Constants.BUILTIN_FILTER_PREFIX
- + Constants.ATTR_FILTER_DRIVER_PREFIX
- + org.eclipse.jgit.lib.Constants.ATTR_FILTER_TYPE_CLEAN,
- FACTORY);
- }
-
- // Used to compute the hash for the original content
- private AtomicObjectOutputStream aOut;
-
- private Lfs lfsUtil;
-
- // the size of the original content
- private long size;
-
- // a temporary file into which the original content is written. When no
- // errors occur this file will be renamed to the mediafile
- private Path tmpFile;
-
- /**
- * Constructor for CleanFilter.
- *
- * @param db
- * the repository
- * @param in
- * an {@link java.io.InputStream} providing the original content
- * @param out
- * the {@link java.io.OutputStream} into which the content of the
- * pointer file should be written. That's the content which will
- * be added to the git repository
- * @throws java.io.IOException
- * when the creation of the temporary file fails or when no
- * {@link java.io.OutputStream} for this file can be created
- */
- public CleanFilter(Repository db, InputStream in, OutputStream out)
- throws IOException {
- super(in, out);
- lfsUtil = new Lfs(db);
- Files.createDirectories(lfsUtil.getLfsTmpDir());
- tmpFile = lfsUtil.createTmpFile();
- this.aOut = new AtomicObjectOutputStream(tmpFile.toAbsolutePath());
- }
-
- /** {@inheritDoc} */
- @Override
- public int run() throws IOException {
- try {
- byte[] buf = new byte[8192];
- int length = in.read(buf);
- if (length != -1) {
- aOut.write(buf, 0, length);
- size += length;
- return length;
- }
- aOut.close();
- AnyLongObjectId loid = aOut.getId();
- aOut = null;
- Path mediaFile = lfsUtil.getMediaFile(loid);
- if (Files.isRegularFile(mediaFile)) {
- long fsSize = Files.size(mediaFile);
- if (fsSize != size) {
- throw new CorruptMediaFile(mediaFile, size, fsSize);
- }
- FileUtils.delete(tmpFile.toFile());
- } else {
- Path parent = mediaFile.getParent();
- if (parent != null) {
- FileUtils.mkdirs(parent.toFile(), true);
- }
- FileUtils.rename(tmpFile.toFile(), mediaFile.toFile(),
- StandardCopyOption.ATOMIC_MOVE);
- }
- LfsPointer lfsPointer = new LfsPointer(loid, size);
- lfsPointer.encode(out);
- in.close();
- out.close();
- return -1;
- } catch (IOException e) {
- if (aOut != null) {
- aOut.abort();
- }
- in.close();
- out.close();
- throw e;
- }
- }
- }
|