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// Copyright (C) 2013 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.server.project.ProjectCache.illegalState;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Patch;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.BinaryResult;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.change.FileContentUtil;
import com.google.gerrit.server.change.FileResource;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.patch.ComparisonType;
import com.google.gerrit.server.patch.Text;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gerrit.server.project.ProjectCache;
import com.google.inject.Inject;
import java.io.IOException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
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 GetContent implements RestReadView<FileResource> {
private final GitRepositoryManager gitManager;
private final PatchSetUtil psUtil;
private final FileContentUtil fileContentUtil;
private final ProjectCache projectCache;
@Option(name = "--parent")
private Integer parent;
@Inject
GetContent(
GitRepositoryManager gitManager,
PatchSetUtil psUtil,
FileContentUtil fileContentUtil,
ProjectCache projectCache) {
this.gitManager = gitManager;
this.psUtil = psUtil;
this.fileContentUtil = fileContentUtil;
this.projectCache = projectCache;
}
@Override
public Response<BinaryResult> apply(FileResource rsrc)
throws ResourceNotFoundException, IOException, BadRequestException {
String path = rsrc.getPatchKey().fileName();
if (Patch.COMMIT_MSG.equals(path)) {
String msg = getMessage(rsrc.getRevision().getChangeResource().getNotes());
return Response.ok(
BinaryResult.create(msg)
.setContentType(FileContentUtil.TEXT_X_GERRIT_COMMIT_MESSAGE)
.base64());
} else if (Patch.MERGE_LIST.equals(path)) {
byte[] mergeList = getMergeList(rsrc.getRevision().getChangeResource().getNotes());
return Response.ok(
BinaryResult.create(mergeList)
.setContentType(FileContentUtil.TEXT_X_GERRIT_MERGE_LIST)
.base64());
}
return Response.ok(
fileContentUtil.getContent(
projectCache
.get(rsrc.getRevision().getProject())
.orElseThrow(illegalState(rsrc.getRevision().getProject())),
rsrc.getRevision().getPatchSet().commitId(),
path,
parent));
}
private String getMessage(ChangeNotes notes) throws IOException {
Change.Id changeId = notes.getChangeId();
PatchSet ps = psUtil.current(notes);
if (ps == null) {
throw new NoSuchChangeException(changeId);
}
try (Repository git = gitManager.openRepository(notes.getProjectName());
RevWalk revWalk = new RevWalk(git)) {
RevCommit commit = revWalk.parseCommit(ps.commitId());
return commit.getFullMessage();
} catch (RepositoryNotFoundException e) {
throw new NoSuchChangeException(changeId, e);
}
}
private byte[] getMergeList(ChangeNotes notes) throws IOException {
Change.Id changeId = notes.getChangeId();
PatchSet ps = psUtil.current(notes);
if (ps == null) {
throw new NoSuchChangeException(changeId);
}
try (Repository git = gitManager.openRepository(notes.getProjectName());
RevWalk revWalk = new RevWalk(git)) {
return Text.forMergeList(
ComparisonType.againstAutoMerge(), revWalk.getObjectReader(), ps.commitId())
.getContent();
} catch (RepositoryNotFoundException e) {
throw new NoSuchChangeException(changeId, e);
}
}
}