org.uberfire.java.nio.fs.jgit.util.commands.Clone.java Source code

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Here is the source code for org.uberfire.java.nio.fs.jgit.util.commands.Clone.java

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/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.uberfire.java.nio.fs.jgit.util.commands;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Optional;

import org.eclipse.jgit.api.errors.InvalidRemoteException;
import org.eclipse.jgit.internal.ketch.KetchLeaderCache;
import org.eclipse.jgit.lib.StoredConfig;
import org.eclipse.jgit.transport.CredentialsProvider;
import org.eclipse.jgit.transport.RefSpec;
import org.uberfire.commons.data.Pair;
import org.uberfire.java.nio.fs.jgit.util.Git;

import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static org.uberfire.commons.validation.PortablePreconditions.checkNotEmpty;
import static org.uberfire.commons.validation.PortablePreconditions.checkNotNull;

public class Clone {

    private final File repoDir;
    private final String origin;
    private final CredentialsProvider credentialsProvider;
    private final boolean isMirror;
    private final KetchLeaderCache leaders;

    public Clone(final File directory, final String origin, final boolean isMirror,
            final CredentialsProvider credentialsProvider, final KetchLeaderCache leaders) {
        this.repoDir = checkNotNull("directory", directory);
        this.origin = checkNotEmpty("origin", origin);
        this.isMirror = isMirror;
        this.credentialsProvider = credentialsProvider;
        this.leaders = leaders;
    }

    public Optional<Git> execute() throws InvalidRemoteException {
        final Git git = Git.createRepository(repoDir, null);

        if (git != null) {
            final Collection<RefSpec> refSpecList;
            if (isMirror) {
                refSpecList = singletonList(new RefSpec("+refs/*:refs/*"));
            } else {
                refSpecList = emptyList();
            }
            final Pair<String, String> remote = Pair.newPair("origin", origin);
            git.fetch(credentialsProvider, remote, refSpecList);

            final StoredConfig config = git.getRepository().getConfig();
            config.setBoolean("remote", "origin", "mirror", true);
            try {
                config.save();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }

            git.syncRemote(remote);

            if (git.isKetchEnabled()) {
                git.convertRefTree();
                git.updateLeaders(leaders);
            }

            git.setHeadAsInitialized();

            return Optional.of(git);
        }

        return Optional.empty();
    }
}