Java Code Examples for org.eclipse.jgit.revwalk.RevCommit#getTree()

@Override
public Churn churn(Repository repository, RevCommit currentCommit) throws Exception {
	if (currentCommit.getParentCount() > 0) {
       	ObjectId oldTree = currentCommit.getParent(0).getTree();
        ObjectId newTree = currentCommit.getTree();
       	final TreeWalk tw = new TreeWalk(repository);
       	tw.setRecursive(true);
       	tw.addTree(oldTree);
       	tw.addTree(newTree);
       	
       	List<DiffEntry> diffs = DiffEntry.scan(tw);
       	DiffFormatter diffFormatter = new DiffFormatter(DisabledOutputStream.INSTANCE);
   		diffFormatter.setRepository(repository);
   		diffFormatter.setContext(0);
   		
       	int addedLines = 0;
   		int deletedLines = 0;
       	for (DiffEntry entry : diffs) {
   			FileHeader header = diffFormatter.toFileHeader(entry);
           	List<? extends HunkHeader> hunks = header.getHunks();
           	for (HunkHeader hunkHeader : hunks) {
           		for (Edit edit : hunkHeader.toEditList()) {
   					if (edit.getType() == Type.INSERT) {
   						addedLines += edit.getLengthB();
   					} else if (edit.getType() == Type.DELETE) {
   						deletedLines += edit.getLengthA();
   					} else if (edit.getType() == Type.REPLACE) {
   						deletedLines += edit.getLengthA();
   						addedLines += edit.getLengthB();
   					}
   				}
           	}
       	}
       	diffFormatter.close();
       	return new Churn(addedLines, deletedLines);
	}
	return null;
}
 

@Nullable
static RevCommit loadOriginalCommit(@NotNull ObjectReader reader, @Nullable ObjectId cacheCommit) throws IOException {
  final RevWalk revWalk = new RevWalk(reader);
  if (cacheCommit != null) {
    final RevCommit revCommit = revWalk.parseCommit(cacheCommit);
    revWalk.parseTree(revCommit.getTree());

    final CanonicalTreeParser treeParser = new CanonicalTreeParser(GitRepository.emptyBytes, reader, revCommit.getTree());
    while (!treeParser.eof()) {
      if (treeParser.getEntryPathString().equals(ENTRY_COMMIT_REF)) {
        return revWalk.parseCommit(treeParser.getEntryObjectId());
      }
      treeParser.next();
    }
  }
  return null;
}
 

private void obtainDiff(Repository repository, RevCommit commit, List<String> paths) throws IOException, GitAPIException {
        // and using commit's tree find the path
        RevTree tree = commit.getTree();
        System.out.println("Having tree: " + tree);

        // now try to find a specific file
        TreeWalk treeWalk = new TreeWalk(repository);
        treeWalk.addTree(tree);
        treeWalk.setRecursive(true);
        for (String path : paths) {
            String filePath = SIVA_COMMITS_DIR + commit.getName() + "/" + path;
            File file = new File(filePath);
            if (!file.exists()) {
                treeWalk.setFilter(PathFilter.create(path));
                if (!treeWalk.next()) {
                    throw new IllegalStateException("Did not find expected file '" + path + "'");
                }

                ObjectId objectId = treeWalk.getObjectId(0);
                ObjectLoader loader = repository.open(objectId);
                // and then one can the loader to read the file
//                loader.copyTo(System.out);
                loader.copyTo(FileUtils.openOutputStream(file));
            }
        }
    }
 

/**
 * Find package assets that are present at the specified commit.
 */
public List<String> getAssetsAtCommit(String commitId, String packagePath) throws Exception {
    try (RevWalk revWalk = new RevWalk(localRepo)) {
        RevCommit commit = revWalk.parseCommit(ObjectId.fromString(commitId));
        // use commit's tree to find the path
        RevTree tree = commit.getTree();
        try (TreeWalk treeWalk = new TreeWalk(localRepo)) {
            treeWalk.addTree(tree);
            treeWalk.setRecursive(true);
            treeWalk.setFilter(PathFilter.create(packagePath));
            List<String> assets = new ArrayList<>();
            while (treeWalk.next()) {
                if (treeWalk.getPathString().equals(packagePath + "/" + treeWalk.getNameString())) {
                    // direct member of package
                    assets.add(treeWalk.getNameString());
                }
            }
            return assets;
        }
        finally {
            revWalk.dispose();
        }
    }
}
 

public void fileTreeDiff(Repository repository, RevCommit currentCommit, List<String> javaFilesBefore, List<String> javaFilesCurrent, Map<String, String> renamedFilesHint) throws Exception {
       if (currentCommit.getParentCount() > 0) {
       	ObjectId oldTree = currentCommit.getParent(0).getTree();
        ObjectId newTree = currentCommit.getTree();
       	final TreeWalk tw = new TreeWalk(repository);
       	tw.setRecursive(true);
       	tw.addTree(oldTree);
       	tw.addTree(newTree);

       	final RenameDetector rd = new RenameDetector(repository);
       	rd.setRenameScore(80);
       	rd.addAll(DiffEntry.scan(tw));

       	for (DiffEntry diff : rd.compute(tw.getObjectReader(), null)) {
       		ChangeType changeType = diff.getChangeType();
       		String oldPath = diff.getOldPath();
       		String newPath = diff.getNewPath();
       		if (changeType != ChangeType.ADD) {
        		if (isJavafile(oldPath)) {
        			javaFilesBefore.add(oldPath);
        		}
        	}
       		if (changeType != ChangeType.DELETE) {
        		if (isJavafile(newPath)) {
        			javaFilesCurrent.add(newPath);
        		}
       		}
       		if (changeType == ChangeType.RENAME && diff.getScore() >= rd.getRenameScore()) {
       			if (isJavafile(oldPath) && isJavafile(newPath)) {
       				renamedFilesHint.put(oldPath, newPath);
       			}
       		}
       	}
       }
}
 

private List<DiffEntryWrapper> doCalculateCommitDiff(
        RevCommit oldCommit,
        RevCommit newCommit,
        ObjectReader reader,
        Git git,
        File repoDir,
        Set<String> excludedPathSet) throws Exception {

    if (Objects.equals(oldCommit.getId(), newCommit.getId())) {
        return Collections.emptyList();
    }

    if (Objects.equals(oldCommit.getTree().getId(), newCommit.getTree().getId())) {
        return Collections.emptyList();
    }

    RenameDetector detector = new RenameDetector(git.getRepository());
    AbstractTreeIterator oldTree = new CanonicalTreeParser(null, reader, oldCommit.getTree());
    AbstractTreeIterator newTree = new CanonicalTreeParser(null, reader, newCommit.getTree());

    List<DiffEntry> entries = git.diff()
            .setOldTree(oldTree)
            .setNewTree(newTree)
            .call();
    detector.reset();
    detector.addAll(entries);
    entries = detector.compute();

    return entries.stream()
            .filter(entry -> !excludedPathSet.contains(entry.getNewPath()))
            .map(entry -> {
                RawText oldText = newRawText(entry, DiffEntry.Side.OLD, reader);
                RawText newText = newRawText(entry, DiffEntry.Side.NEW, reader);
                return DiffEntryWrapper.builder()
                        .gitDir(repoDir)
                        .diffEntry(entry)
                        .editList(calculateEditList(oldText, newText))
                        .build();
            }).collect(Collectors.toList());
}
 

private void populateFileContents(Repository repository, RevCommit commit,
		List<String> filePaths, Map<String, String> fileContents, Set<String> repositoryDirectories) throws Exception {
	logger.info("Processing {} {} ...", repository.getDirectory().getParent().toString(), commit.getName());
	RevTree parentTree = commit.getTree();
	try (TreeWalk treeWalk = new TreeWalk(repository)) {
		treeWalk.addTree(parentTree);
		treeWalk.setRecursive(true);
		while (treeWalk.next()) {
			String pathString = treeWalk.getPathString();
			if(filePaths.contains(pathString)) {
				ObjectId objectId = treeWalk.getObjectId(0);
				ObjectLoader loader = repository.open(objectId);
				StringWriter writer = new StringWriter();
				IOUtils.copy(loader.openStream(), writer);
				fileContents.put(pathString, writer.toString());
			}
			if(pathString.endsWith(".java") && pathString.contains("/")) {
				String directory = pathString.substring(0, pathString.lastIndexOf("/"));
				repositoryDirectories.add(directory);
				//include sub-directories
				String subDirectory = new String(directory);
				while(subDirectory.contains("/")) {
					subDirectory = subDirectory.substring(0, subDirectory.lastIndexOf("/"));
					repositoryDirectories.add(subDirectory);
				}
			}
		}
	}
}
 

private static RevTree getTree(Repository repository) throws IOException {
    ObjectId lastCommitId = repository.resolve(Constants.HEAD);

    // a RevWalk allows to walk over commits based on some filtering
    RevWalk revWalk = new RevWalk(repository);
    RevCommit commit = revWalk.parseCommit(lastCommitId);

    // and using commit's tree find the path
    RevTree tree = commit.getTree();
    return tree;
}
 

@Test
public void getTreeOfWorkDirCommit_shouldContainTheStashedChanges() throws IOException {
  byte[] expected = someBytes();
  writeToGfs("/test_file.txt", expected);
  Result result = createStash(gfs).execute();
  RevCommit stash = result.getCommit();
  ObjectId tree = stash.getTree();
  byte[] actual = TreeUtils.readFile("/test_file.txt", tree, repo).getData();
  assertArrayEquals(expected, actual);
}
 

@Override
public void walkCommitTree(
    String projectRoot, String name, WalkTreeCommandInterface commandInterface)
    throws UnableToWalkCommitTreeException {
  try {
    Git git = Git.open(new File(projectRoot));
    ObjectId commitId = git.getRepository().resolve(name);

    RevWalk walk = new RevWalk(git.getRepository());
    RevCommit commit = walk.parseCommit(commitId);
    RevTree tree = commit.getTree();
    TreeWalk treeWalk = new TreeWalk(git.getRepository());
    treeWalk.addTree(tree);
    treeWalk.setRecursive(true);

    while (treeWalk.next()) {
      if (!treeWalk.getPathString().endsWith(".java")
          || treeWalk.getPathString().contains("build")
          || treeWalk.getPathString().contains("out")
          || treeWalk.getPathString().contains("classes")
          || treeWalk.getPathString().contains("node_modules")
          || treeWalk.getPathString().contains("test")) {
        continue;
      }
      commandInterface.walkMethod(treeWalk.getPathString());
    }
    git.close();
  } catch (IOException e) {
    throw new UnableToWalkCommitTreeException(e.getMessage());
  }
}
 

public ObjectStream getRemoteContentStream(String branch, String path) throws Exception {
    ObjectId id = localRepo.resolve("refs/remotes/origin/" + branch);
    try (ObjectReader reader = localRepo.newObjectReader();
            RevWalk walk = new RevWalk(reader)) {
        RevCommit commit = walk.parseCommit(id);
        RevTree tree = commit.getTree();
        TreeWalk treewalk = TreeWalk.forPath(reader, path, tree);
        if (treewalk != null) {
            return reader.open(treewalk.getObjectId(0)).openStream();
        }
        else {
            return null;
        }
    }
}
 

/**
 * Returns the blob information for the file at the specified path and commit
 *
 * @param repoItem
 * @param commit
 * @return
 * @throws Exception
 */
public byte[] getBlob(String repoItem, String commit) throws Exception
{
    byte[] data;

    String parentPath = repository.getDirectory().getParent();

    ObjectId commitId = repository.resolve(commit);

    ObjectReader reader = repository.newObjectReader();
    RevWalk revWalk = new RevWalk(reader);
    RevCommit revCommit = revWalk.parseCommit(commitId);
    RevTree tree = revCommit.getTree();
    TreeWalk treeWalk = TreeWalk.forPath(reader, repoItem, tree);

    if (treeWalk != null)
    {
        data = reader.open(treeWalk.getObjectId(0)).getBytes();
    }
    else
    {
        throw new IllegalStateException("Did not find expected file '" + repoItem + "'");
    }

    reader.release();

    return data;
}
 

private void addTrees(Map<SubtreeConfig, RevCommit> parentCommits, TreeWalk treeWalk)
		throws IOException {
	for (Map.Entry<SubtreeConfig, RevCommit> entry : parentCommits.entrySet()) {
		String directory = entry.getKey().getSubtreeDirectory();
		RevCommit parentCommit = entry.getValue();
		if (".".equals(directory)) {
			treeWalk.addTree(parentCommit.getTree());
		} else {
			byte[] prefix = directory.getBytes(RawParseUtils.UTF8_CHARSET);
			CanonicalTreeParser treeParser = new CanonicalTreeParser(prefix,
					treeWalk.getObjectReader(), parentCommit.getTree());
			treeWalk.addTree(treeParser);
		}
	}
}
 

public RevTree getTreeForCommit(Repository repository, String commitId) throws IOException {
    ObjectId commitObjectId = repository.resolve(commitId);

    try (RevWalk revWalk = new RevWalk(repository)) {
        RevCommit commit = revWalk.parseCommit(commitObjectId);

        // and using commit's tree find the path
        RevTree tree = commit.getTree();
        return tree;
    }
}
 

@Override
public List<DiffEntry> getDiffs(String projectRoot, String commitName1, String commitName2)
    throws UnableToGetDiffsFromCommitsException {
  try {
    Git git = Git.open(new File(projectRoot));
    Repository repository = git.getRepository();
    RevCommit commit1 = repository.parseCommit(ObjectId.fromString(commitName1));
    RevCommit commit2 = repository.parseCommit(ObjectId.fromString(commitName2));
    // change commits so that commit2 is the older one
    if (commit1.getCommitTime() > commit2.getCommitTime()) {
      RevCommit tmp = commit1;
      commit1 = commit2;
      commit2 = tmp;
    }

    ObjectReader reader = git.getRepository().newObjectReader();

    CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
    ObjectId oldTree = commit1.getTree();
    oldTreeIter.reset(reader, oldTree);

    CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
    ObjectId newTree = commit2.getTree();
    newTreeIter.reset(reader, newTree);

    DiffFormatter df = new DiffFormatter(new ByteArrayOutputStream());
    df.setRepository(repository);
    List<DiffEntry> entries =
        df.scan(oldTreeIter, newTreeIter).stream()
            .map(
                diffEntry -> {
                  DiffEntry entry = new DiffEntry();
                  entry.setNewPath(diffEntry.getNewPath());
                  entry.setOldPath(diffEntry.getOldPath());
                  entry.setChangeType(
                      ChangeTypeMapper.jgitToCoderadar(diffEntry.getChangeType()).ordinal());
                  return entry;
                })
            .collect(Collectors.toList());
    git.close();
    return entries;
  } catch (IOException e) {
    throw new UnableToGetDiffsFromCommitsException(e.getMessage());
  }
}
 

private RevTree getRevTree() throws IOException {
    Ref ref = repository.exactRef(branch.getFullRef());
    RevCommit commit = new RevWalk(repository).parseCommit(ref.getObjectId());
    return commit.getTree();
}
 

@Nonnull
private RevCommit makeWorkingDirectoryCommit(RevCommit indexCommit) throws IOException {
  AnyObjectId tree = indexCommit.getTree();
  List<RevCommit> parents = asList(parent, indexCommit);
  return createCommit(workingDirectoryMessage, tree, committer, committer, parents, repo);
}
 

@Nonnull
public static RootNode fromCommit(RevCommit commit, GfsObjectService objService) throws IOException {
  return new RootNode(commit.getTree(), objService);
}
 

@SuppressWarnings("unchecked")
public void loadGitRepository(File gitProjectRootDir) throws IOException, GitAPIException {
    gitRepo = openRepository(gitProjectRootDir);

    try (final Git git = new Git(gitRepo)) {

        // Check if remote exists.
        if (!isEmpty(remoteToPush)) {
            final List<RemoteConfig> remotes = git.remoteList().call();
            final boolean isRemoteExist = remotes.stream().anyMatch(remote -> remote.getName().equals(remoteToPush));
            if (!isRemoteExist) {
                final List<String> remoteNames = remotes.stream().map(RemoteConfig::getName).collect(Collectors.toList());
                throw new IllegalArgumentException(
                        format("The configured remote '%s' to push does not exist. Available remotes are %s", remoteToPush, remoteNames));
            }
        }

        boolean isLatestCommit = true;
        try {
            for (RevCommit commit : git.log().call()) {
                final String shortCommitId = commit.getId().abbreviate(7).name();
                logger.debug("Processing a commit: {}", shortCommitId);
                final RevTree tree = commit.getTree();

                try (final TreeWalk treeWalk = new TreeWalk(gitRepo)) {
                    treeWalk.addTree(tree);

                    // Path -> ObjectId
                    final Map<String, ObjectId> bucketObjectIds = new HashMap<>();
                    final Map<String, ObjectId> flowSnapshotObjectIds = new HashMap<>();
                    while (treeWalk.next()) {
                        if (treeWalk.isSubtree()) {
                            treeWalk.enterSubtree();
                        } else {
                            final String pathString = treeWalk.getPathString();
                            // TODO: what is this nth?? When does it get grater than 0? Tree count seems to be always 1..
                            if (pathString.endsWith("/" + BUCKET_FILENAME)) {
                                bucketObjectIds.put(pathString, treeWalk.getObjectId(0));
                            } else if (pathString.endsWith(GitFlowPersistenceProvider.SNAPSHOT_EXTENSION)) {
                                flowSnapshotObjectIds.put(pathString, treeWalk.getObjectId(0));
                            }
                        }
                    }

                    if (bucketObjectIds.isEmpty()) {
                        // No bucket.yml means at this point, all flows are deleted. No need to scan older commits because those are already deleted.
                        logger.debug("Tree at commit {} does not contain any " + BUCKET_FILENAME + ". Stop loading commits here.", shortCommitId);
                        return;
                    }

                    loadBuckets(gitRepo, commit, isLatestCommit, bucketObjectIds, flowSnapshotObjectIds);
                    isLatestCommit = false;
                }
            }
        } catch (NoHeadException e) {
            logger.debug("'{}' does not have any commit yet. Starting with empty buckets.", gitProjectRootDir);
        }

    }
}
 

@Nonnull
private RevCommit makeWorkingDirectoryCommit(RevCommit indexCommit) throws IOException {
  AnyObjectId tree = indexCommit.getTree();
  List<RevCommit> parents = asList(parent, indexCommit);
  return createCommit(workingDirectoryMessage, tree, committer, committer, parents, repo);
}