// Copyright (C) 2008 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 com.google.gerrit.lifecycle.LifecycleListener;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.madgag.compress.CompressUtil;
import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.io.FilenameUtils;
import org.apache.velocity.texen.util.FileUtil;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryCache;
import org.eclipse.jgit.lib.RepositoryCache.FileKey;
import org.eclipse.jgit.storage.file.LockFile;
import org.eclipse.jgit.storage.file.WindowCache;
import org.eclipse.jgit.storage.file.WindowCacheConfig;
import org.eclipse.jgit.util.FS;
import org.eclipse.jgit.util.FileUtils;
import org.eclipse.jgit.util.IO;
import org.eclipse.jgit.util.RawParseUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import static com.madgag.compress.CompressUtil.unzip;
import static org.apache.commons.io.FileUtils.deleteQuietly;
import static org.apache.commons.io.FileUtils.listFiles;
import static org.apache.commons.io.FileUtils.openInputStream;
import static org.apache.commons.io.FilenameUtils.removeExtension;
/** Manages Git repositories stored on the local filesystem. */
@Singleton
public class LocalDiskRepositoryManager implements GitRepositoryManager {
private static final Logger log =
LoggerFactory.getLogger(LocalDiskRepositoryManager.class);
private static final String UNNAMED =
"Unnamed repository; edit this file to name it for gitweb.";
public static class Lifecycle implements LifecycleListener {
private final Config cfg;
@Inject
Lifecycle(@GerritServerConfig final Config cfg) {
this.cfg = cfg;
}
@Override
public void start() {
final WindowCacheConfig c = new WindowCacheConfig();
c.fromConfig(cfg);
WindowCache.reconfigure(c);
}
@Override
public void stop() {
}
}
private final File basePath;
@Inject
LocalDiskRepositoryManager(final SitePaths site,
@GerritServerConfig final Config cfg) {
basePath = site.resolve(cfg.getString("gerrit", null, "basePath"));
log.info("basePath="+basePath);
if (basePath == null) {
throw new IllegalStateException("gerrit.basePath must be configured");
}
for (File zipFile : listFiles(basePath, new String[]{"zip"}, true)) {
File unzippedFolder = new File(removeExtension(zipFile.toString()));
log.info("Unzipping "+zipFile+" to "+unzippedFolder);
deleteQuietly(unzippedFolder);
try {
unzip(openInputStream(zipFile), unzippedFolder);
} catch (Exception e) { throw new RuntimeException((e)); }
}
}
/** @return base directory under which all projects are stored. */
public File getBasePath() {
return basePath;
}
private File gitDirOf(String name) {
return new File(getBasePath(), name);
}
public Repository openRepository(String name)
throws RepositoryNotFoundException {
if (isUnreasonableName(name)) {
throw new RepositoryNotFoundException("Invalid name: " + name);
}
try {
final FileKey loc = FileKey.lenient(gitDirOf(name), FS.DETECTED);
return RepositoryCache.open(loc);
} catch (IOException e1) {
final RepositoryNotFoundException e2;
e2 = new RepositoryNotFoundException("Cannot open repository " + name);
e2.initCause(e1);
throw e2;
}
}
public Repository createRepository(String name)
throws RepositoryNotFoundException {
if (isUnreasonableName(name)) {
throw new RepositoryNotFoundException("Invalid name: " + name);
}
try {
File dir = FileKey.resolve(gitDirOf(name), FS.DETECTED);
FileKey loc;
if (dir != null) {
// Already exists on disk, use the repository we found.
//
loc = FileKey.exact(dir, FS.DETECTED);
} else {
// It doesn't exist under any of the standard permutations
// of the repository name, so prefer the standard bare name.
//
if (!name.endsWith(Constants.DOT_GIT_EXT)) {
name = name + Constants.DOT_GIT_EXT;
}
loc = FileKey.exact(new File(basePath, name), FS.DETECTED);
}
return RepositoryCache.open(loc, false);
} catch (IOException e1) {
final RepositoryNotFoundException e2;
e2 = new RepositoryNotFoundException("Cannot open repository " + name);
e2.initCause(e1);
throw e2;
}
}
private boolean isUnreasonableName(String name) {
if (name.length() == 0) return true; // no empty paths
if (name.indexOf('\\') >= 0) return true; // no windows/dos stlye paths
if (name.charAt(0) == '/') return true; // no absolute paths
if (new File(name).isAbsolute()) return true; // no absolute paths
if (name.startsWith("../")) return true; // no "l../etc/passwd"
if (name.contains("/../")) return true; // no "foo/../etc/passwd"
if (name.contains("/./")) return true; // "foo/./foo" is insane to ask
if (name.contains("//")) return true; // windows UNC path can be "//..."
return false; // is a reasonable name
}
}