com.google.gerrit.server.project.Reachable Maven / Gradle / Ivy
// Copyright (C) 2017 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.project;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.change.IncludedInResolver;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackend.RefFilterOptions;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefDatabase;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* Report whether a commit is reachable from a set of commits. This is used for checking if a user
* has read permissions on a commit.
*/
@Singleton
public class Reachable {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final PermissionBackend permissionBackend;
@Inject
Reachable(PermissionBackend permissionBackend) {
this.permissionBackend = permissionBackend;
}
/** @return true if a commit is reachable from a given set of refs. */
public boolean fromRefs(
Project.NameKey project, Repository repo, RevCommit commit, Map refs) {
try (RevWalk rw = new RevWalk(repo)) {
Map filtered =
permissionBackend
.currentUser()
.project(project)
.filter(refs, repo, RefFilterOptions.builder().setFilterTagsSeparately(true).build());
return IncludedInResolver.includedInAny(repo, rw, commit, filtered.values());
} catch (IOException | PermissionBackendException e) {
logger.atSevere().withCause(e).log(
"Cannot verify permissions to commit object %s in repository %s", commit.name(), project);
return false;
}
}
/** @return true if a commit is reachable from a repo's branches and tags. */
boolean fromHeadsOrTags(Project.NameKey project, Repository repo, RevCommit commit) {
try {
RefDatabase refdb = repo.getRefDatabase();
Collection heads = refdb.getRefsByPrefix(Constants.R_HEADS);
Collection tags = refdb.getRefsByPrefix(Constants.R_TAGS);
Map refs = Maps.newHashMapWithExpectedSize(heads.size() + tags.size());
for (Ref r : Iterables.concat(heads, tags)) {
refs.put(r.getName(), r);
}
return fromRefs(project, repo, commit, refs);
} catch (IOException e) {
logger.atSevere().withCause(e).log(
"Cannot verify permissions to commit object %s in repository %s", commit.name(), project);
return false;
}
}
}