com.google.gerrit.server.restapi.change.CreateMergePatchSet Maven / Gradle / Ivy
// Copyright (C) 2016 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.common.base.MoreObjects;
import com.google.common.base.Strings;
import com.google.common.collect.Iterables;
import com.google.gerrit.entities.BranchNameKey;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.Project;
import com.google.gerrit.exceptions.InvalidMergeStrategyException;
import com.google.gerrit.exceptions.MergeWithConflictsNotSupportedException;
import com.google.gerrit.extensions.client.ListChangesOption;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.common.MergeInput;
import com.google.gerrit.extensions.common.MergePatchSetInput;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.MergeConflictException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.GerritPersonIdent;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.change.ChangeFinder;
import com.google.gerrit.server.change.ChangeJson;
import com.google.gerrit.server.change.ChangeResource;
import com.google.gerrit.server.change.NotifyResolver;
import com.google.gerrit.server.change.PatchSetInserter;
import com.google.gerrit.server.git.CodeReviewCommit;
import com.google.gerrit.server.git.CodeReviewCommit.CodeReviewRevWalk;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.MergeUtil;
import com.google.gerrit.server.git.MergeUtilFactory;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.permissions.ChangePermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.permissions.RefPermission;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
import com.google.gerrit.server.restapi.project.CommitsCollection;
import com.google.gerrit.server.submit.MergeIdenticalTreeException;
import com.google.gerrit.server.update.BatchUpdate;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.time.Instant;
import java.time.ZoneId;
import java.util.List;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.util.ChangeIdUtil;
@Singleton
public class CreateMergePatchSet implements RestModifyView {
private final BatchUpdate.Factory updateFactory;
private final GitRepositoryManager gitManager;
private final CommitsCollection commits;
private final ZoneId serverZoneId;
private final Provider user;
private final ChangeJson.Factory jsonFactory;
private final PatchSetUtil psUtil;
private final MergeUtilFactory mergeUtilFactory;
private final PatchSetInserter.Factory patchSetInserterFactory;
private final ProjectCache projectCache;
private final ChangeFinder changeFinder;
private final PermissionBackend permissionBackend;
@Inject
CreateMergePatchSet(
BatchUpdate.Factory updateFactory,
GitRepositoryManager gitManager,
CommitsCollection commits,
@GerritPersonIdent PersonIdent myIdent,
Provider user,
ChangeJson.Factory json,
PatchSetUtil psUtil,
MergeUtilFactory mergeUtilFactory,
PatchSetInserter.Factory patchSetInserterFactory,
ProjectCache projectCache,
ChangeFinder changeFinder,
PermissionBackend permissionBackend) {
this.updateFactory = updateFactory;
this.gitManager = gitManager;
this.commits = commits;
this.serverZoneId = myIdent.getZoneId();
this.user = user;
this.jsonFactory = json;
this.psUtil = psUtil;
this.mergeUtilFactory = mergeUtilFactory;
this.patchSetInserterFactory = patchSetInserterFactory;
this.projectCache = projectCache;
this.changeFinder = changeFinder;
this.permissionBackend = permissionBackend;
}
@Override
public Response apply(ChangeResource rsrc, MergePatchSetInput in)
throws IOException, RestApiException, UpdateException, PermissionBackendException {
// Not allowed to create a new patch set if the current patch set is locked.
psUtil.checkPatchSetNotLocked(rsrc.getNotes());
rsrc.permissions().check(ChangePermission.ADD_PATCH_SET);
if (in.author != null) {
permissionBackend
.currentUser()
.project(rsrc.getProject())
.ref(rsrc.getChange().getDest().branch())
.check(RefPermission.FORGE_AUTHOR);
}
ProjectState projectState =
projectCache.get(rsrc.getProject()).orElseThrow(illegalState(rsrc.getProject()));
projectState.checkStatePermitsWrite();
MergeInput merge = in.merge;
if (merge == null || Strings.isNullOrEmpty(merge.source)) {
throw new BadRequestException("merge.source must be non-empty");
}
if (in.author != null
&& (Strings.isNullOrEmpty(in.author.email) || Strings.isNullOrEmpty(in.author.name))) {
throw new BadRequestException("Author must specify name and email");
}
in.baseChange = Strings.nullToEmpty(in.baseChange).trim();
PatchSet ps = psUtil.current(rsrc.getNotes());
Change change = rsrc.getChange();
Project.NameKey project = change.getProject();
BranchNameKey dest = change.getDest();
try (Repository git = gitManager.openRepository(project);
ObjectInserter oi = git.newObjectInserter();
ObjectReader reader = oi.newReader();
CodeReviewRevWalk rw = CodeReviewCommit.newRevWalk(reader)) {
RevCommit sourceCommit = MergeUtil.resolveCommit(git, rw, merge.source);
if (!commits.canRead(projectState, git, sourceCommit)) {
throw new ResourceNotFoundException(
"cannot find source commit: " + merge.source + " to merge.");
}
RevCommit currentPsCommit;
List groups = null;
if (!in.inheritParent && !in.baseChange.isEmpty()) {
PatchSet basePS = findBasePatchSet(in.baseChange);
currentPsCommit = rw.parseCommit(basePS.commitId());
groups = basePS.groups();
} else {
currentPsCommit = rw.parseCommit(ps.commitId());
}
Instant now = TimeUtil.now();
IdentifiedUser me = user.get().asIdentifiedUser();
PersonIdent author =
in.author == null
? me.newCommitterIdent(now, serverZoneId)
: new PersonIdent(in.author.name, in.author.email, now, serverZoneId);
CodeReviewCommit newCommit =
createMergeCommit(
in,
projectState,
dest,
git,
oi,
rw,
currentPsCommit,
sourceCommit,
author,
ObjectId.fromString(change.getKey().get().substring(1)));
oi.flush();
PatchSet.Id nextPsId = ChangeUtil.nextPatchSetId(ps.id());
PatchSetInserter psInserter =
patchSetInserterFactory.create(rsrc.getNotes(), nextPsId, newCommit);
try (BatchUpdate bu = updateFactory.create(project, me, now)) {
bu.setRepository(git, rw, oi);
bu.setNotify(NotifyResolver.Result.none());
psInserter
.setMessage(messageForChange(nextPsId, newCommit))
.setWorkInProgress(!newCommit.getFilesWithGitConflicts().isEmpty())
.setCheckAddPatchSetPermission(false);
if (groups != null) {
psInserter.setGroups(groups);
}
bu.addOp(rsrc.getId(), psInserter);
bu.execute();
}
ChangeJson json = jsonFactory.create(ListChangesOption.CURRENT_REVISION);
ChangeInfo changeInfo = json.format(psInserter.getChange());
changeInfo.containsGitConflicts =
!newCommit.getFilesWithGitConflicts().isEmpty() ? true : null;
return Response.ok(changeInfo);
} catch (InvalidMergeStrategyException | MergeWithConflictsNotSupportedException e) {
throw new BadRequestException(e.getMessage());
}
}
private PatchSet findBasePatchSet(String baseChange)
throws PermissionBackendException, UnprocessableEntityException {
List notes = changeFinder.find(baseChange);
if (notes.size() != 1) {
throw new UnprocessableEntityException("Base change not found: " + baseChange);
}
ChangeNotes change = Iterables.getOnlyElement(notes);
try {
permissionBackend.currentUser().change(change).check(ChangePermission.READ);
} catch (AuthException e) {
throw new UnprocessableEntityException("Read not permitted for " + baseChange, e);
}
return psUtil.current(change);
}
private CodeReviewCommit createMergeCommit(
MergePatchSetInput in,
ProjectState projectState,
BranchNameKey dest,
Repository git,
ObjectInserter oi,
CodeReviewRevWalk rw,
RevCommit currentPsCommit,
RevCommit sourceCommit,
PersonIdent author,
ObjectId changeId)
throws ResourceNotFoundException, MergeIdenticalTreeException, MergeConflictException,
IOException {
ObjectId parentCommit;
if (in.inheritParent) {
// inherit first parent from previous patch set
parentCommit = currentPsCommit.getParent(0);
} else if (!in.baseChange.isEmpty()) {
parentCommit = currentPsCommit.getId();
} else {
// get the current branch tip of destination branch
Ref destRef = git.getRefDatabase().exactRef(dest.branch());
if (destRef != null) {
parentCommit = destRef.getObjectId();
} else {
throw new ResourceNotFoundException("cannot find destination branch");
}
}
RevCommit mergeTip = rw.parseCommit(parentCommit);
String commitMsg;
if (Strings.emptyToNull(in.subject) != null) {
commitMsg = ChangeIdUtil.insertId(in.subject, changeId);
} else {
// reuse previous patch set commit message
commitMsg = currentPsCommit.getFullMessage();
}
String mergeStrategy =
MoreObjects.firstNonNull(
Strings.emptyToNull(in.merge.strategy),
mergeUtilFactory.create(projectState).mergeStrategyName());
return MergeUtil.createMergeCommit(
oi,
git.getConfig(),
mergeTip,
sourceCommit,
mergeStrategy,
in.merge.allowConflicts,
author,
commitMsg,
rw);
}
private static String messageForChange(PatchSet.Id patchSetId, CodeReviewCommit commit) {
StringBuilder stringBuilder =
new StringBuilder(String.format("Uploaded patch set %s.", patchSetId.get()));
if (!commit.getFilesWithGitConflicts().isEmpty()) {
stringBuilder.append("\n\nThe following files contain Git conflicts:\n");
commit.getFilesWithGitConflicts().stream()
.sorted()
.forEach(filePath -> stringBuilder.append("* ").append(filePath).append("\n"));
}
return stringBuilder.toString();
}
}
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