jetbrains.buildServer.buildTriggers.vcs.git.patch.BulkPatchBuilderImpl.java Source code

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Here is the source code for jetbrains.buildServer.buildTriggers.vcs.git.patch.BulkPatchBuilderImpl.java

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/*
 * Copyright 2000-2015 JetBrains s.r.o.
 *
 * 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 jetbrains.buildServer.buildTriggers.vcs.git.patch;

import jetbrains.buildServer.buildTriggers.vcs.git.GitServerExtension;
import jetbrains.buildServer.buildTriggers.vcs.git.GitVcsSupport;
import jetbrains.buildServer.buildTriggers.vcs.git.OperationContext;
import jetbrains.buildServer.buildTriggers.vcs.git.ServerPluginConfig;
import jetbrains.buildServer.vcs.BulkPatchService;
import jetbrains.buildServer.vcs.CheckoutRules;
import jetbrains.buildServer.vcs.VcsException;
import jetbrains.buildServer.vcs.VcsRoot;
import jetbrains.buildServer.vcs.patches.PatchBuilder;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.Repository;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

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

/**
 * @author Eugene Petrenko (eugene.petrenko@gmail.com)
 */
public class BulkPatchBuilderImpl implements BulkPatchService, GitServerExtension {
    private final ServerPluginConfig myConfig;
    private final GitVcsSupport myVcs;

    public BulkPatchBuilderImpl(@NotNull final ServerPluginConfig config, @NotNull final GitVcsSupport vcs) {
        myConfig = config;
        myVcs = vcs;

        myVcs.addExtension(this);
    }

    public void buildPatches(@NotNull final VcsRoot root, @NotNull final CheckoutRules rules,
            @NotNull final List<BulkPatchBuilderRequest> requests, @NotNull final BulkPatchBuilder patch)
            throws VcsException, IOException {
        final OperationContext ctx = myVcs.createContext(root, "bulk patch " + requests.size() + " commits");
        try {
            final Repository myRepo = ctx.getRepository();
            final ObjectReader contentsReader = myRepo.getObjectDatabase().newReader();
            final ObjectReader treesReader = myRepo.getObjectDatabase().newReader();

            for (BulkPatchBuilderRequest request : requests) {
                final PatchBuilder patchBuilder = patch.startPatch(request);

                final String prevBase = request.getFromVersion();
                final String toBase = request.getToVersion();

                try {
                    new GitPatchBuilder(ctx, patchBuilder, prevBase, toBase, rules, myConfig.verboseTreeWalkLog()) {
                        @NotNull
                        @Override
                        protected ObjectReader newObjectReaderForTree() {
                            return treesReader;
                        }

                        @NotNull
                        @Override
                        protected ContentLoaderFactory contentLoaderFactory() {
                            return new ContentLoaderFactory() {
                                @Nullable
                                public ObjectLoader open(@NotNull final Repository repo, @NotNull final ObjectId id)
                                        throws IOException {
                                    assert repo == myRepo;
                                    return contentsReader.open(id);
                                }
                            };
                        }
                    }.buildPatch();

                } catch (Throwable e) {
                    throw new VcsException(
                            "Failed to build patch " + prevBase + " -> " + toBase + ". " + e.getMessage(), e);
                } finally {
                    patch.endPatch(request, patchBuilder);
                }
            }
        } catch (Throwable e) {
            throw new VcsException("Failed to complete bulk patch." + e.getMessage(), e);
        } finally {
            ctx.close();
        }
    }
}