DfsBundleWriter.java

/*
 * Copyright (c) 2020, Google LLC  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
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
package org.eclipse.jgit.internal.storage.dfs;

import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jgit.internal.storage.pack.CachedPack;
import org.eclipse.jgit.lib.ProgressMonitor;
import org.eclipse.jgit.transport.BundleWriter;

/** Writes {@link DfsRepository} to a Git bundle. */
public class DfsBundleWriter {
    /**
     * Writes the entire {@link DfsRepository} to a Git bundle.
     * <p>
     * This method try to avoid traversing the pack files as much as possible
     * and dumps all objects as-is to a Git bundle.
     *
     * @param pm
     *            progress monitor
     * @param os
     *            Git bundle output
     * @param db
     *            repository
     * @throws IOException
     *             thrown if the output stream throws one.
     */
    public static void writeEntireRepositoryAsBundle(ProgressMonitor pm,
            OutputStream os, DfsRepository db) throws IOException {
        BundleWriter bw = new BundleWriter(db);
        db.getRefDatabase().getRefs().forEach(bw::include);
        List<CachedPack> packs = new ArrayList<>();
        for (DfsPackFile p : db.getObjectDatabase().getPacks()) {
            packs.add(new DfsCachedPack(p));
        }
        bw.addObjectsAsIs(packs);
        bw.writeBundle(pm, os);
    }

    private DfsBundleWriter() {
    }
}