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/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* 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 git4idea.repo;
import com.intellij.dvcs.repo.RepositoryUtil;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.VirtualFileManager;
import com.intellij.openapi.vfs.newvfs.BulkFileListener;
import com.intellij.openapi.vfs.newvfs.events.VFileEvent;
import com.intellij.util.concurrency.QueueProcessor;
import com.intellij.util.messages.MessageBusConnection;
import com.intellij.vcsUtil.VcsUtil;
import git4idea.util.GitFileUtils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
/**
* Listens to .git service files changes and updates {@link GitRepository} when needed.
*/
final class GitRepositoryUpdater implements Disposable, BulkFileListener {
@NotNull private final GitRepository myRepository;
@NotNull private final GitRepositoryFiles myRepositoryFiles;
@Nullable private final MessageBusConnection myMessageBusConnection;
@NotNull private final QueueProcessor<Object> myUpdateQueue;
@NotNull private final Object DUMMY_UPDATE_OBJECT = new Object();
@Nullable private final VirtualFile myRemotesDir;
@Nullable private final VirtualFile myHeadsDir;
@Nullable private final VirtualFile myTagsDir;
@Nullable private final LocalFileSystem.WatchRequest myWatchRequest;
GitRepositoryUpdater(@NotNull GitRepository repository) {
myRepository = repository;
VirtualFile gitDir = repository.getGitDir();
myWatchRequest = LocalFileSystem.getInstance().addRootToWatch(gitDir.getPath(), true);
myRepositoryFiles = GitRepositoryFiles.getInstance(gitDir);
RepositoryUtil.visitVcsDirVfs(gitDir, GitRepositoryFiles.getSubDirRelativePaths());
myHeadsDir = VcsUtil.getVirtualFile(myRepositoryFiles.getRefsHeadsPath());
myRemotesDir = VcsUtil.getVirtualFile(myRepositoryFiles.getRefsRemotesPath());
myTagsDir = VcsUtil.getVirtualFile(myRepositoryFiles.getRefsTagsPath());
Project project = repository.getProject();
myUpdateQueue = new QueueProcessor<Object>(new RepositoryUtil.Updater(repository), project.getDisposed());
if (!project.isDisposed()) {
myMessageBusConnection = project.getMessageBus().connect();
myMessageBusConnection.subscribe(VirtualFileManager.VFS_CHANGES, this);
}
else {
myMessageBusConnection = null;
}
}
@Override
public void dispose() {
if (myWatchRequest != null) {
LocalFileSystem.getInstance().removeWatchedRoot(myWatchRequest);
}
if (myMessageBusConnection != null) {
myMessageBusConnection.disconnect();
}
}
@Override
public void before(@NotNull List<? extends VFileEvent> events) {
// everything is handled in #after()
}
@Override
public void after(@NotNull List<? extends VFileEvent> events) {
// which files in .git were changed
boolean configChanged = false;
boolean headChanged = false;
boolean branchFileChanged = false;
boolean packedRefsChanged = false;
boolean rebaseFileChanged = false;
boolean mergeFileChanged = false;
boolean tagChanged = false;
for (VFileEvent event : events) {
String filePath = GitFileUtils.stripFileProtocolPrefix(event.getPath());
if (myRepositoryFiles.isConfigFile(filePath)) {
configChanged = true;
} else if (myRepositoryFiles.isHeadFile(filePath)) {
headChanged = true;
} else if (myRepositoryFiles.isBranchFile(filePath)) {
// it is also possible, that a local branch with complex name ("folder/branch") was created => the folder also to be watched.
branchFileChanged = true;
RepositoryUtil.visitAllChildrenRecursively(myHeadsDir);
} else if (myRepositoryFiles.isRemoteBranchFile(filePath)) {
// it is possible, that a branch from a new remote was fetch => we need to add new remote folder to the VFS
branchFileChanged = true;
RepositoryUtil.visitAllChildrenRecursively(myRemotesDir);
} else if (myRepositoryFiles.isPackedRefs(filePath)) {
packedRefsChanged = true;
} else if (myRepositoryFiles.isRebaseFile(filePath)) {
rebaseFileChanged = true;
} else if (myRepositoryFiles.isMergeFile(filePath)) {
mergeFileChanged = true;
} else if (myRepositoryFiles.isTagFile(filePath)) {
RepositoryUtil.visitAllChildrenRecursively(myTagsDir);
tagChanged = true;
}
}
if (headChanged || configChanged || branchFileChanged || packedRefsChanged || rebaseFileChanged || mergeFileChanged) {
myUpdateQueue.add(DUMMY_UPDATE_OBJECT);
}
else if (tagChanged) {
myRepository.getProject().getMessageBus().syncPublisher(GitRepository.GIT_REPO_CHANGE).repositoryChanged(myRepository);
}
}
}
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