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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.git;
import static java.util.stream.Collectors.toList;
import com.google.common.collect.Iterables;
import com.google.common.collect.Streams;
import com.google.gerrit.reviewdb.client.RefNames;
import com.google.gerrit.server.project.ProjectState;
import java.io.IOException;
import java.util.Arrays;
import java.util.Set;
import java.util.stream.Stream;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.Config;
/** Configuration file in the projects refs/meta/config branch. */
public class ProjectLevelConfig extends VersionedMetaData {
private final String fileName;
private final ProjectState project;
private Config cfg;
public ProjectLevelConfig(String fileName, ProjectState project) {
this.fileName = fileName;
this.project = project;
}
@Override
protected String getRefName() {
return RefNames.REFS_CONFIG;
}
@Override
protected void onLoad() throws IOException, ConfigInvalidException {
cfg = readConfig(fileName);
}
public Config get() {
if (cfg == null) {
cfg = new Config();
}
return cfg;
}
public Config getWithInheritance() {
return getWithInheritance(false);
}
/**
* Get a Config that includes the values from all parent projects.
*
* <p>Merging means that matching sections/subsection will be merged to include the values from
* both parent and child config.
*
* <p>No merging means that matching sections/subsections in the child project will replace the
* corresponding value from the parent.
*
* @param merge whether to merge parent values with child values or not.
* @return a combined config.
*/
public Config getWithInheritance(boolean merge) {
Config cfgWithInheritance = new Config();
try {
cfgWithInheritance.fromText(get().toText());
} catch (ConfigInvalidException e) {
// cannot happen
}
ProjectState parent = Iterables.getFirst(project.parents(), null);
if (parent != null) {
Config parentCfg = parent.getConfig(fileName).getWithInheritance();
for (String section : parentCfg.getSections()) {
Set<String> allNames = get().getNames(section);
for (String name : parentCfg.getNames(section)) {
String[] parentValues = parentCfg.getStringList(section, null, name);
if (!allNames.contains(name)) {
cfgWithInheritance.setStringList(section, null, name, Arrays.asList(parentValues));
} else if (merge) {
cfgWithInheritance.setStringList(
section,
null,
name,
Stream.concat(
Arrays.stream(cfg.getStringList(section, null, name)),
Arrays.stream(parentValues))
.sorted()
.distinct()
.collect(toList()));
}
}
for (String subsection : parentCfg.getSubsections(section)) {
allNames = get().getNames(section, subsection);
for (String name : parentCfg.getNames(section, subsection)) {
String[] parentValues = parentCfg.getStringList(section, subsection, name);
if (!allNames.contains(name)) {
cfgWithInheritance.setStringList(
section, subsection, name, Arrays.asList(parentValues));
} else if (merge) {
cfgWithInheritance.setStringList(
section,
subsection,
name,
Streams.concat(
Arrays.stream(cfg.getStringList(section, subsection, name)),
Arrays.stream(parentValues))
.sorted()
.distinct()
.collect(toList()));
}
}
}
}
}
return cfgWithInheritance;
}
@Override
protected boolean onSave(CommitBuilder commit) throws IOException, ConfigInvalidException {
if (commit.getMessage() == null || "".equals(commit.getMessage())) {
commit.setMessage("Updated configuration\n");
}
saveConfig(fileName, cfg);
return true;
}
}
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