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// Copyright (C) 2014 The Android Open Source Project
//
// 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 com.google.gerrit.server.restapi.change;
import static com.google.gerrit.git.ObjectIds.abbreviateName;
import com.google.common.base.Strings;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.BinaryResult;
import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.change.ArchiveFormatInternal;
import com.google.gerrit.server.change.RevisionResource;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.inject.Inject;
import java.io.IOException;
import java.io.OutputStream;
import org.eclipse.jgit.api.ArchiveCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.kohsuke.args4j.Option;
public class GetArchive implements RestReadView<RevisionResource> {
private final GitRepositoryManager repoManager;
private final AllowedFormats allowedFormats;
@Nullable private String format;
@Option(name = "--format")
public void setFormat(String format) {
this.format = format;
}
@Inject
GetArchive(GitRepositoryManager repoManager, AllowedFormats allowedFormats) {
this.repoManager = repoManager;
this.allowedFormats = allowedFormats;
}
@Override
public Response<BinaryResult> apply(RevisionResource rsrc)
throws BadRequestException, IOException, MethodNotAllowedException {
if (Strings.isNullOrEmpty(format)) {
throw new BadRequestException("format is not specified");
}
ArchiveFormatInternal f = allowedFormats.extensions.get("." + format);
if (f == null) {
throw new BadRequestException("unknown archive format");
}
if (f == ArchiveFormatInternal.ZIP) {
throw new MethodNotAllowedException("zip format is disabled");
}
boolean close = true;
Repository repo = repoManager.openRepository(rsrc.getProject());
try {
RevCommit commit;
String name;
try (RevWalk rw = new RevWalk(repo)) {
commit = rw.parseCommit(rsrc.getPatchSet().commitId());
name = name(f, rw, commit);
}
BinaryResult bin =
new BinaryResult() {
@Override
public void writeTo(OutputStream out) throws IOException {
try {
new ArchiveCommand(repo)
.setFormat(f.name())
.setTree(commit.getTree())
.setOutputStream(out)
.call();
} catch (GitAPIException e) {
throw new IOException(e);
}
}
@Override
public void close() throws IOException {
repo.close();
}
};
bin.disableGzip().setContentType(f.getMimeType()).setAttachmentName(name);
close = false;
return Response.ok(bin);
} finally {
if (close) {
repo.close();
}
}
}
private static String name(ArchiveFormatInternal format, RevWalk rw, RevCommit commit)
throws IOException {
return String.format(
"%s%s", abbreviateName(commit, rw.getObjectReader()), format.getDefaultSuffix());
}
}