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// Copyright (C) 2023 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 java.io.File;
import java.io.IOException;
import java.util.function.BiFunction;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.internal.storage.file.FileRepository;
import org.eclipse.jgit.lib.RefDatabase;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryCache;
import org.eclipse.jgit.util.FS;
/** A FileRepository with a dynamic RefDatabase supplied via a BiFunction. */
public class DynamicRefDbRepository extends FileRepository {
public static class FileKey extends RepositoryCache.FileKey {
private BiFunction<File, RefDatabase, RefDatabase> refDatabaseSupplier;
public static FileKey lenient(
File directory, FS fs, BiFunction<File, RefDatabase, RefDatabase> refDatabaseSupplier) {
final File gitdir = resolve(directory, fs);
return new FileKey(gitdir != null ? gitdir : directory, fs, refDatabaseSupplier);
}
private final FS fs;
/**
* @param directory exact location of the repository.
* @param fs the file system abstraction which will be necessary to perform certain file system
* operations.
*/
public FileKey(
File directory, FS fs, BiFunction<File, RefDatabase, RefDatabase> refDatabaseSupplier) {
super(canonical(directory), fs);
this.fs = fs;
this.refDatabaseSupplier = refDatabaseSupplier;
}
@Override
public Repository open(boolean mustExist) throws IOException {
if (mustExist && !isGitRepository(getFile(), fs))
throw new RepositoryNotFoundException(getFile());
return new DynamicRefDbRepository(getFile(), refDatabaseSupplier);
}
private static File canonical(File path) {
try {
return path.getCanonicalFile();
} catch (IOException e) {
return path.getAbsoluteFile();
}
}
}
private final File path;
private final BiFunction<File, RefDatabase, RefDatabase> refDatabaseSupplier;
public DynamicRefDbRepository(
File path, BiFunction<File, RefDatabase, RefDatabase> refDatabaseSupplier)
throws IOException {
super(path);
this.path = path;
this.refDatabaseSupplier = refDatabaseSupplier;
}
@Override
public RefDatabase getRefDatabase() {
return refDatabaseSupplier.apply(path, super.getRefDatabase());
}
}