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// 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.reviewdb.Project;
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 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.IO;
import org.eclipse.jgit.util.RawParseUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
/** 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"));
if (basePath == null) {
throw new IllegalStateException("gerrit.basePath must be configured");
}
}
/** @return base directory under which all projects are stored. */
public File getBasePath() {
return basePath;
}
private File gitDirOf(Project.NameKey name) {
return new File(getBasePath(), name.get());
}
public Repository openRepository(Project.NameKey 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(final Project.NameKey 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.
//
String n = name.get();
if (!n.endsWith(Constants.DOT_GIT_EXT)) {
n = n + Constants.DOT_GIT_EXT;
}
loc = FileKey.exact(new File(basePath, n), 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;
}
}
public String getProjectDescription(final Project.NameKey name)
throws RepositoryNotFoundException, IOException {
final Repository e = openRepository(name);
try {
final File d = new File(e.getDirectory(), "description");
String description;
try {
description = RawParseUtils.decode(IO.readFully(d));
} catch (FileNotFoundException err) {
return null;
}
if (description != null) {
description = description.trim();
if (description.isEmpty()) {
description = null;
}
if (UNNAMED.equals(description)) {
description = null;
}
}
return description;
} finally {
e.close();
}
}
public void setProjectDescription(final Project.NameKey name,
final String description) {
// Update git's description file, in case gitweb is being used
//
try {
final Repository e;
final LockFile f;
e = openRepository(name);
try {
f = new LockFile(new File(e.getDirectory(), "description"), FS.DETECTED);
if (f.lock()) {
String d = description;
if (d != null) {
d = d.trim();
if (d.length() > 0) {
d += "\n";
}
} else {
d = "";
}
f.write(Constants.encode(d));
f.commit();
}
} finally {
e.close();
}
} catch (RepositoryNotFoundException e) {
log.error("Cannot update description for " + name, e);
} catch (IOException e) {
log.error("Cannot update description for " + name, e);
}
}
private boolean isUnreasonableName(final Project.NameKey nameKey) {
final String name = nameKey.get();
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
}
}
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