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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.googlesource.gerrit.plugins.replication;
import static java.util.stream.Collectors.toList;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.git.WorkQueue;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.function.Predicate;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.storage.file.FileBasedConfig;
import org.eclipse.jgit.transport.RefSpec;
import org.eclipse.jgit.transport.RemoteConfig;
import org.eclipse.jgit.transport.URIish;
import org.eclipse.jgit.util.FS;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Singleton
public class ReplicationFileBasedConfig implements ReplicationConfig {
static final Logger log = LoggerFactory.getLogger(ReplicationFileBasedConfig.class);
private List<Destination> destinations;
private Path cfgPath;
private boolean replicateAllOnPluginStart;
private boolean defaultForceUpdate;
private final FileBasedConfig config;
@Inject
public ReplicationFileBasedConfig(SitePaths site, DestinationFactory destinationFactory)
throws ConfigInvalidException, IOException {
this.cfgPath = site.etc_dir.resolve("replication.config");
this.config = new FileBasedConfig(cfgPath.toFile(), FS.DETECTED);
this.destinations = allDestinations(destinationFactory);
}
/*
* (non-Javadoc)
* @see
* com.googlesource.gerrit.plugins.replication.ReplicationConfig#getDestinations
* (com.googlesource.gerrit.plugins.replication.ReplicationConfig.FilterType)
*/
@Override
public List<Destination> getDestinations(FilterType filterType) {
Predicate<? super Destination> filter;
switch (filterType) {
case PROJECT_CREATION:
filter = dest -> dest.isCreateMissingRepos();
break;
case PROJECT_DELETION:
filter = dest -> dest.isReplicateProjectDeletions();
break;
case ALL:
default:
filter = dest -> true;
break;
}
return destinations.stream().filter(Objects::nonNull).filter(filter).collect(toList());
}
private List<Destination> allDestinations(DestinationFactory destinationFactory)
throws ConfigInvalidException, IOException {
if (!config.getFile().exists()) {
log.warn("Config file " + config.getFile() + " does not exist; not replicating");
return Collections.emptyList();
}
if (config.getFile().length() == 0) {
log.info("Config file " + config.getFile() + " is empty; not replicating");
return Collections.emptyList();
}
try {
config.load();
} catch (ConfigInvalidException e) {
throw new ConfigInvalidException(
String.format("Config file %s is invalid: %s", config.getFile(), e.getMessage()), e);
} catch (IOException e) {
throw new IOException(
String.format("Cannot read %s: %s", config.getFile(), e.getMessage()), e);
}
replicateAllOnPluginStart = config.getBoolean("gerrit", "replicateOnStartup", true);
defaultForceUpdate = config.getBoolean("gerrit", "defaultForceUpdate", false);
ImmutableList.Builder<Destination> dest = ImmutableList.builder();
for (RemoteConfig c : allRemotes(config)) {
if (c.getURIs().isEmpty()) {
continue;
}
// If destination for push is not set assume equal to source.
for (RefSpec ref : c.getPushRefSpecs()) {
if (ref.getDestination() == null) {
ref.setDestination(ref.getSource());
}
}
if (c.getPushRefSpecs().isEmpty()) {
c.addPushRefSpec(
new RefSpec()
.setSourceDestination("refs/*", "refs/*")
.setForceUpdate(defaultForceUpdate));
}
Destination destination = destinationFactory.create(new DestinationConfiguration(c, config));
if (!destination.isSingleProjectMatch()) {
for (URIish u : c.getURIs()) {
if (u.getPath() == null || !u.getPath().contains("${name}")) {
throw new ConfigInvalidException(
String.format(
"remote.%s.url \"%s\" lacks ${name} placeholder in %s",
c.getName(), u, config.getFile()));
}
}
}
dest.add(destination);
}
return dest.build();
}
/* (non-Javadoc)
* @see com.googlesource.gerrit.plugins.replication.ReplicationConfig#isReplicateAllOnPluginStart()
*/
@Override
public boolean isReplicateAllOnPluginStart() {
return replicateAllOnPluginStart;
}
/* (non-Javadoc)
* @see com.googlesource.gerrit.plugins.replication.ReplicationConfig#isDefaultForceUpdate()
*/
@Override
public boolean isDefaultForceUpdate() {
return defaultForceUpdate;
}
private static List<RemoteConfig> allRemotes(FileBasedConfig cfg) throws ConfigInvalidException {
Set<String> names = cfg.getSubsections("remote");
List<RemoteConfig> result = Lists.newArrayListWithCapacity(names.size());
for (String name : names) {
try {
result.add(new RemoteConfig(cfg, name));
} catch (URISyntaxException e) {
throw new ConfigInvalidException(
String.format("remote %s has invalid URL in %s", name, cfg.getFile()));
}
}
return result;
}
/* (non-Javadoc)
* @see com.googlesource.gerrit.plugins.replication.ReplicationConfig#isEmpty()
*/
@Override
public boolean isEmpty() {
return destinations.isEmpty();
}
Path getCfgPath() {
return cfgPath;
}
@Override
public int shutdown() {
int discarded = 0;
for (Destination cfg : destinations) {
discarded += cfg.shutdown();
}
return discarded;
}
FileBasedConfig getConfig() {
return config;
}
@Override
public void startup(WorkQueue workQueue) {
for (Destination cfg : destinations) {
cfg.start(workQueue);
}
}
}
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