import org.eclipse.jgit.lib.MutableObjectId; //导入依赖的package包/类
private RevWalk(ObjectReader or, boolean closeReader) {
	reader = or;
	idBuffer = new MutableObjectId();
	objects = new ObjectIdOwnerMap<>();
	roots = new ArrayList<>();
	queue = new DateRevQueue();
	pending = new StartGenerator(this);
	sorting = EnumSet.of(RevSort.NONE);
	filter = RevFilter.ALL;
	treeFilter = TreeFilter.ALL;
	this.closeReader = closeReader;
}
 

import org.eclipse.jgit.lib.MutableObjectId; //导入依赖的package包/类
protected boolean streamFromRepo(HttpServletRequest request, HttpServletResponse response, Repository repository, RevCommit commit,
		String requestedPath) throws IOException {

	boolean served = false;
	RevWalk rw = new RevWalk(repository);
	TreeWalk tw = new TreeWalk(repository);
	try {
		tw.reset();
		tw.addTree(commit.getTree());
		PathFilter f = PathFilter.create(requestedPath);
		tw.setFilter(f);
		tw.setRecursive(true);
		MutableObjectId id = new MutableObjectId();
		ObjectReader reader = tw.getObjectReader();
		while (tw.next()) {
			FileMode mode = tw.getFileMode(0);
			if (mode == FileMode.GITLINK || mode == FileMode.TREE) {
				continue;
			}
			tw.getObjectId(id, 0);

			String filename = StringUtils.getLastPathElement(requestedPath);
			try {
				String userAgent = request.getHeader("User-Agent");
				if (userAgent != null && userAgent.indexOf("MSIE 5.5") > -1) {
					response.setHeader("Content-Disposition", "filename=\"" + URLEncoder.encode(filename, Constants.ENCODING) + "\"");
				} else if (userAgent != null && userAgent.indexOf("MSIE") > -1) {
					response.setHeader("Content-Disposition", "attachment; filename=\"" + URLEncoder.encode(filename, Constants.ENCODING) + "\"");
				} else {
					response.setHeader("Content-Disposition", "attachment; filename=\""
							+ new String(filename.getBytes(Constants.ENCODING), "latin1") + "\"");
				}
			} catch (UnsupportedEncodingException e) {
				response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
			}

			long len = reader.getObjectSize(id, org.eclipse.jgit.lib.Constants.OBJ_BLOB);
			setContentType(response, "application/octet-stream");
			response.setIntHeader("Content-Length", (int) len);
			ObjectLoader ldr = repository.open(id);
			ldr.copyTo(response.getOutputStream());
			served = true;
		}
	} finally {
		tw.close();
		rw.dispose();
	}

	response.flushBuffer();
	return served;
}
 

import org.eclipse.jgit.lib.MutableObjectId; //导入依赖的package包/类
/**
 * Zips the contents of the tree at the (optionally) specified revision and the (optionally) specified basepath to the supplied outputstream.
 * 
 * @param repository
 * @param basePath
 *            if unspecified, entire repository is assumed.
 * @param objectId
 *            if unspecified, HEAD is assumed.
 * @param os
 * @return true if repository was successfully zipped to supplied output stream
 */
public static boolean zip(Repository repository, String basePath, String objectId, OutputStream os) {
	RevCommit commit = JGitUtils.getCommit(repository, objectId);
	if (commit == null) {
		return false;
	}
	boolean success = false;
	RevWalk rw = new RevWalk(repository);
	TreeWalk tw = new TreeWalk(repository);
	try {
		tw.reset();
		tw.addTree(commit.getTree());
		ZipArchiveOutputStream zos = new ZipArchiveOutputStream(os);
		zos.setComment("Generated by Gitblit");
		if (!StringUtils.isEmpty(basePath)) {
			PathFilter f = PathFilter.create(basePath);
			tw.setFilter(f);
		}
		tw.setRecursive(true);
		MutableObjectId id = new MutableObjectId();
		ObjectReader reader = tw.getObjectReader();
		long modified = commit.getAuthorIdent().getWhen().getTime();
		while (tw.next()) {
			FileMode mode = tw.getFileMode(0);
			if (mode == FileMode.GITLINK || mode == FileMode.TREE) {
				continue;
			}
			tw.getObjectId(id, 0);

			ZipArchiveEntry entry = new ZipArchiveEntry(tw.getPathString());
			entry.setSize(reader.getObjectSize(id, Constants.OBJ_BLOB));
			entry.setComment(commit.getName());
			entry.setUnixMode(mode.getBits());
			entry.setTime(modified);
			zos.putArchiveEntry(entry);

			ObjectLoader ldr = repository.open(id);
			ldr.copyTo(zos);
			zos.closeArchiveEntry();
		}
		zos.finish();
		success = true;
	} catch (IOException e) {
		error(e, repository, "{0} failed to zip files from commit {1}", commit.getName());
	} finally {
		tw.close();
		rw.close();
		rw.dispose();
	}
	return success;
}
 

import org.eclipse.jgit.lib.MutableObjectId; //导入依赖的package包/类
/**
 * Zips the contents of the tree at the (optionally) specified revision and
 * the (optionally) specified basepath to the supplied outputstream.
 * 
 * @param repository
 * @param basePath
 *            if unspecified, entire repository is assumed.
 * @param objectId
 *            if unspecified, HEAD is assumed.
 * @param os
 * @return true if repository was successfully zipped to supplied output
 *         stream
 */
public static boolean zip(Repository repository, String basePath, String objectId,
		OutputStream os) {
	RevCommit commit = JGitUtils.getCommit(repository, objectId);
	if (commit == null) {
		return false;
	}
	boolean success = false;
	RevWalk rw = new RevWalk(repository);
	TreeWalk tw = new TreeWalk(repository);
	try {
		tw.reset();
		tw.addTree(commit.getTree());
		ZipArchiveOutputStream zos = new ZipArchiveOutputStream(os);
		zos.setComment("Generated by Gitblit");
		if (!StringUtils.isEmpty(basePath)) {
			PathFilter f = PathFilter.create(basePath);
			tw.setFilter(f);
		}
		tw.setRecursive(true);
		MutableObjectId id = new MutableObjectId();
		ObjectReader reader = tw.getObjectReader();
		long modified = commit.getAuthorIdent().getWhen().getTime();
		while (tw.next()) {
			FileMode mode = tw.getFileMode(0);
			if (mode == FileMode.GITLINK || mode == FileMode.TREE) {
				continue;
			}
			tw.getObjectId(id, 0);

			ZipArchiveEntry entry = new ZipArchiveEntry(tw.getPathString());
			entry.setSize(reader.getObjectSize(id, Constants.OBJ_BLOB));
			entry.setComment(commit.getName());
			entry.setUnixMode(mode.getBits());
			entry.setTime(modified);
			zos.putArchiveEntry(entry);

			ObjectLoader ldr = repository.open(id);
			ldr.copyTo(zos);
			zos.closeArchiveEntry();
		}
		zos.finish();
		success = true;
	} catch (IOException e) {
		error(e, repository, "{0} failed to zip files from commit {1}", commit.getName());
	} finally {
		tw.release();
		rw.dispose();
	}
	return success;
}