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// Copyright (C) 2018 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.change;
import static com.google.common.base.Preconditions.checkState;
import static com.google.gerrit.extensions.client.ListChangesOption.ALL_COMMITS;
import static com.google.gerrit.extensions.client.ListChangesOption.ALL_FILES;
import static com.google.gerrit.extensions.client.ListChangesOption.ALL_REVISIONS;
import static com.google.gerrit.extensions.client.ListChangesOption.COMMIT_FOOTERS;
import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_ACTIONS;
import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_COMMIT;
import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_FILES;
import static com.google.gerrit.extensions.client.ListChangesOption.DETAILED_ACCOUNTS;
import static com.google.gerrit.extensions.client.ListChangesOption.DOWNLOAD_COMMANDS;
import static com.google.gerrit.extensions.client.ListChangesOption.PUSH_CERTIFICATES;
import static com.google.gerrit.extensions.client.ListChangesOption.WEB_LINKS;
import static com.google.gerrit.server.CommonConverters.toGitPerson;
import static com.google.gerrit.server.project.ProjectCache.illegalState;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Patch;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.Project;
import com.google.gerrit.extensions.client.ListChangesOption;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.common.CommitInfo;
import com.google.gerrit.extensions.common.FetchInfo;
import com.google.gerrit.extensions.common.PushCertificateInfo;
import com.google.gerrit.extensions.common.RevisionInfo;
import com.google.gerrit.extensions.common.WebLinkInfo;
import com.google.gerrit.extensions.config.DownloadCommand;
import com.google.gerrit.extensions.config.DownloadScheme;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.registration.Extension;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.server.AnonymousUser;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.GpgException;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.WebLinks;
import com.google.gerrit.server.account.AccountLoader;
import com.google.gerrit.server.account.GpgApiAdapter;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.MergeUtilFactory;
import com.google.gerrit.server.patch.PatchListNotAvailableException;
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.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.assistedinject.Assisted;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Optional;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/** Produces {@link RevisionInfo} and {@link CommitInfo} which are serialized to JSON afterwards. */
public class RevisionJson {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
public interface Factory {
RevisionJson create(Iterable<ListChangesOption> options);
}
private final MergeUtilFactory mergeUtilFactory;
private final IdentifiedUser.GenericFactory userFactory;
private final FileInfoJson fileInfoJson;
private final GpgApiAdapter gpgApi;
private final ChangeResource.Factory changeResourceFactory;
private final ChangeKindCache changeKindCache;
private final ActionJson actionJson;
private final DynamicMap<DownloadScheme> downloadSchemes;
private final DynamicMap<DownloadCommand> downloadCommands;
private final WebLinks webLinks;
private final Provider<CurrentUser> userProvider;
private final ProjectCache projectCache;
private final ImmutableSet<ListChangesOption> options;
private final AccountLoader.Factory accountLoaderFactory;
private final AnonymousUser anonymous;
private final GitRepositoryManager repoManager;
private final PermissionBackend permissionBackend;
@Inject
RevisionJson(
Provider<CurrentUser> userProvider,
AnonymousUser anonymous,
ProjectCache projectCache,
IdentifiedUser.GenericFactory userFactory,
MergeUtilFactory mergeUtilFactory,
FileInfoJson fileInfoJson,
AccountLoader.Factory accountLoaderFactory,
DynamicMap<DownloadScheme> downloadSchemes,
DynamicMap<DownloadCommand> downloadCommands,
WebLinks webLinks,
ActionJson actionJson,
GpgApiAdapter gpgApi,
ChangeResource.Factory changeResourceFactory,
ChangeKindCache changeKindCache,
GitRepositoryManager repoManager,
PermissionBackend permissionBackend,
@Assisted Iterable<ListChangesOption> options) {
this.userProvider = userProvider;
this.anonymous = anonymous;
this.projectCache = projectCache;
this.userFactory = userFactory;
this.mergeUtilFactory = mergeUtilFactory;
this.fileInfoJson = fileInfoJson;
this.accountLoaderFactory = accountLoaderFactory;
this.downloadSchemes = downloadSchemes;
this.downloadCommands = downloadCommands;
this.webLinks = webLinks;
this.actionJson = actionJson;
this.gpgApi = gpgApi;
this.changeResourceFactory = changeResourceFactory;
this.changeKindCache = changeKindCache;
this.permissionBackend = permissionBackend;
this.repoManager = repoManager;
this.options = ImmutableSet.copyOf(options);
}
/**
* Returns a {@link RevisionInfo} based on a change and patch set. Reads from the repository
* depending on the options provided when constructing this instance.
*/
public RevisionInfo getRevisionInfo(ChangeData cd, PatchSet in)
throws PatchListNotAvailableException, GpgException, IOException, PermissionBackendException {
AccountLoader accountLoader = accountLoaderFactory.create(has(DETAILED_ACCOUNTS));
try (Repository repo = openRepoIfNecessary(cd.project());
RevWalk rw = newRevWalk(repo)) {
RevisionInfo rev = toRevisionInfo(accountLoader, cd, in, repo, rw, true, null);
accountLoader.fill();
return rev;
}
}
/**
* Returns a {@link CommitInfo} based on a commit and formatting options. Uses the provided
* RevWalk and assumes it is backed by an open repository.
*/
public CommitInfo getCommitInfo(
Project.NameKey project,
RevWalk rw,
RevCommit commit,
boolean addLinks,
boolean fillCommit,
String branchName,
String changeKey)
throws IOException {
CommitInfo info = new CommitInfo();
if (fillCommit) {
info.commit = commit.name();
}
info.parents = new ArrayList<>(commit.getParentCount());
info.author = toGitPerson(commit.getAuthorIdent());
info.committer = toGitPerson(commit.getCommitterIdent());
info.subject = commit.getShortMessage();
info.message = commit.getFullMessage();
if (addLinks) {
ImmutableList<WebLinkInfo> patchSetLinks =
webLinks.getPatchSetLinks(
project, commit.name(), commit.getFullMessage(), branchName, changeKey);
info.webLinks = patchSetLinks.isEmpty() ? null : patchSetLinks;
ImmutableList<WebLinkInfo> resolveConflictsLinks =
webLinks.getResolveConflictsLinks(
project, commit.name(), commit.getFullMessage(), branchName);
info.resolveConflictsWebLinks =
resolveConflictsLinks.isEmpty() ? null : resolveConflictsLinks;
}
for (RevCommit parent : commit.getParents()) {
rw.parseBody(parent);
CommitInfo i = new CommitInfo();
i.commit = parent.name();
i.subject = parent.getShortMessage();
if (addLinks) {
ImmutableList<WebLinkInfo> parentLinks =
webLinks.getParentLinks(project, parent.name(), parent.getFullMessage(), branchName);
i.webLinks = parentLinks.isEmpty() ? null : parentLinks;
}
info.parents.add(i);
}
return info;
}
/**
* Returns multiple {@link RevisionInfo}s for a single change. Uses the provided {@link
* AccountLoader} to lazily populate accounts. Callers have to call {@link AccountLoader#fill()}
* afterwards to populate all accounts in the returned {@link RevisionInfo}s.
*/
Map<String, RevisionInfo> getRevisions(
AccountLoader accountLoader,
ChangeData cd,
Map<PatchSet.Id, PatchSet> map,
Optional<PatchSet.Id> limitToPsId,
ChangeInfo changeInfo)
throws PatchListNotAvailableException, GpgException, IOException, PermissionBackendException {
Map<String, RevisionInfo> res = new LinkedHashMap<>();
try (Repository repo = openRepoIfNecessary(cd.project());
RevWalk rw = newRevWalk(repo)) {
for (PatchSet in : map.values()) {
PatchSet.Id id = in.id();
boolean want;
if (has(ALL_REVISIONS)) {
want = true;
} else if (limitToPsId.isPresent()) {
want = id.equals(limitToPsId.get());
} else {
want = id.equals(cd.change().currentPatchSetId());
}
if (want) {
res.put(
in.commitId().name(),
toRevisionInfo(accountLoader, cd, in, repo, rw, false, changeInfo));
}
}
return res;
}
}
private Map<String, FetchInfo> makeFetchMap(ChangeData cd, PatchSet in)
throws PermissionBackendException {
Map<String, FetchInfo> r = new LinkedHashMap<>();
for (Extension<DownloadScheme> e : downloadSchemes) {
String schemeName = e.getExportName();
DownloadScheme scheme = e.getProvider().get();
if (!scheme.isEnabled()
|| scheme.isHidden()
|| (scheme.isAuthRequired() && !userProvider.get().isIdentifiedUser())) {
continue;
}
if (!scheme.isAuthSupported() && !isWorldReadable(cd)) {
continue;
}
String projectName = cd.project().get();
String url = scheme.getUrl(projectName);
String refName = in.refName();
FetchInfo fetchInfo = new FetchInfo(url, refName);
r.put(schemeName, fetchInfo);
if (has(DOWNLOAD_COMMANDS)) {
DownloadCommandsJson.populateFetchMap(
scheme, downloadCommands, projectName, refName, fetchInfo);
}
}
return r;
}
private RevisionInfo toRevisionInfo(
AccountLoader accountLoader,
ChangeData cd,
PatchSet in,
@Nullable Repository repo,
@Nullable RevWalk rw,
boolean fillCommit,
@Nullable ChangeInfo changeInfo)
throws PatchListNotAvailableException, GpgException, IOException, PermissionBackendException {
Change c = cd.change();
RevisionInfo out = new RevisionInfo();
out.isCurrent = in.id().equals(c.currentPatchSetId());
out._number = in.id().get();
out.ref = in.refName();
out.setCreated(in.createdOn());
out.uploader = accountLoader.get(in.uploader());
out.fetch = makeFetchMap(cd, in);
out.kind = changeKindCache.getChangeKind(rw, repo != null ? repo.getConfig() : null, cd, in);
out.description = in.description().orElse(null);
boolean setCommit = has(ALL_COMMITS) || (out.isCurrent && has(CURRENT_COMMIT));
boolean addFooters = out.isCurrent && has(COMMIT_FOOTERS);
if (setCommit || addFooters) {
checkState(rw != null);
checkState(repo != null);
Project.NameKey project = c.getProject();
String rev = in.commitId().name();
RevCommit commit = rw.parseCommit(ObjectId.fromString(rev));
rw.parseBody(commit);
String branchName = cd.change().getDest().branch();
if (setCommit) {
out.commit =
getCommitInfo(
project, rw, commit, has(WEB_LINKS), fillCommit, branchName, c.getKey().get());
}
if (addFooters) {
Ref ref = repo.exactRef(branchName);
RevCommit mergeTip = null;
if (ref != null) {
mergeTip = rw.parseCommit(ref.getObjectId());
rw.parseBody(mergeTip);
}
out.commitWithFooters =
mergeUtilFactory
.create(projectCache.get(project).orElseThrow(illegalState(project)))
.createCommitMessageOnSubmit(commit, mergeTip, cd.notes(), in.id());
}
}
if (has(ALL_FILES) || (out.isCurrent && has(CURRENT_FILES))) {
try {
out.files = fileInfoJson.getFileInfoMap(c, in);
out.files.remove(Patch.COMMIT_MSG);
out.files.remove(Patch.MERGE_LIST);
} catch (ResourceConflictException e) {
logger.atWarning().withCause(e).log("creating file list failed");
}
}
if (out.isCurrent && has(CURRENT_ACTIONS) && userProvider.get().isIdentifiedUser()) {
actionJson.addRevisionActions(
changeInfo,
out,
new RevisionResource(changeResourceFactory.create(cd, userProvider.get()), in));
}
if (gpgApi.isEnabled() && has(PUSH_CERTIFICATES)) {
if (in.pushCertificate().isPresent()) {
out.pushCertificate =
gpgApi.checkPushCertificate(
in.pushCertificate().get(), userFactory.create(in.uploader()));
} else {
out.pushCertificate = new PushCertificateInfo();
}
}
return out;
}
private boolean has(ListChangesOption option) {
return options.contains(option);
}
private boolean isWorldReadable(ChangeData cd) throws PermissionBackendException {
if (!permissionBackend.user(anonymous).change(cd).test(ChangePermission.READ)) {
return false;
}
ProjectState projectState =
projectCache.get(cd.project()).orElseThrow(illegalState(cd.project()));
return projectState.statePermitsRead();
}
@Nullable
private Repository openRepoIfNecessary(Project.NameKey project) throws IOException {
if (has(ALL_COMMITS) || has(CURRENT_COMMIT) || has(COMMIT_FOOTERS)) {
return repoManager.openRepository(project);
}
return null;
}
@Nullable
private RevWalk newRevWalk(@Nullable Repository repo) {
return repo != null ? new RevWalk(repo) : null;
}
}