/// <summary>
/// Loads previous versions stored from the specified file path.
/// </summary>
/// <param name="filePath">The file path.</param>
/// <returns>FileVersionTracker.</returns>
public static FileVersionTracker Load(string filePath)
{
// Try to compact it before using it
FileVersionStorage.Compact(filePath);
bool isFirstPass = true;
while (true)
{
FileStream fileStream = null;
// Try to open the file, if we get an exception, this might be due only because someone is locking the file to
// save it while we are trying to open it
const int RetryOpenFileStream = 20;
var random = new Random();
for (int i = 0; i < RetryOpenFileStream; i++)
{
try
{
fileStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
break;
}
catch (Exception)
{
if ((i + 1) == RetryOpenFileStream)
{
throw;
}
Thread.Sleep(50 + random.Next(100));
}
}
var tracker = new FileVersionTracker(fileStream);
try
{
tracker.storage.LoadNewValues();
return(tracker);
}
catch (Exception)
{
// If an exception occurred, we are going to try to recover from it by reseting it.
// reset file length to 0
fileStream.SetLength(0);
tracker.Dispose();
if (!isFirstPass)
{
throw;
}
}
isFirstPass = false;
}
}
/// <summary>
/// Gets the default file version tracker for this machine.
/// </summary>
/// <returns>FileVersionTracker.</returns>
public static FileVersionTracker GetDefault()
{
lock (lockDefaultTracker)
{
if (defaultFileVersionTracker == null)
{
var filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), DefaultFileVersionTrackerFile);
var directory = Path.GetDirectoryName(filePath);
if (directory != null && !Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
// Loads the file version cache
defaultFileVersionTracker = Load(filePath);
}
}
return(defaultFileVersionTracker);
}
/// <summary>
/// Runs this instance.
/// </summary>
public BuildResultCode Run(Mode mode, bool writeIndexFile = true)
{
// When we setup the database ourself we have to take responsibility to close it after
var shouldCloseDatabase = ObjectDatabase == null;
OpenObjectDatabase(buildPath, indexName);
PreRun();
runMode = mode;
if (IsRunning)
{
throw new InvalidOperationException("An instance of this Builder is already running.");
}
// reset build cache from previous build run
cancellationTokenSource = new CancellationTokenSource();
Cancelled = false;
IsRunning = true;
DisableCompressionIds.Clear();
// Reseting result map
var inputHashes = FileVersionTracker.GetDefault();
{
var builderContext = new BuilderContext(inputHashes, TryExecuteRemote);
resultMap = ObjectDatabase;
scheduler = new Scheduler();
// Schedule the build
ScheduleBuildStep(builderContext, null, Root, InitialVariables);
// Create threads
var threads = Enumerable.Range(0, ThreadCount).Select(x => new Thread(SafeAction.Wrap(RunUntilEnd))
{
IsBackground = true
}).ToArray();
// Start threads
int threadId = 0;
foreach (var thread in threads)
{
thread.Name = (BuilderName ?? "Builder") + " worker thread " + (++threadId);
thread.Start();
}
// Wait for all threads to finish
foreach (var thread in threads)
{
thread.Join();
}
}
BuildResultCode result;
if (runMode == Mode.Build)
{
if (cancellationTokenSource.IsCancellationRequested)
{
Logger.Error("Build cancelled.");
result = BuildResultCode.Cancelled;
}
else if (stepCounter.Get(ResultStatus.Failed) > 0 || stepCounter.Get(ResultStatus.NotTriggeredPrerequisiteFailed) > 0)
{
Logger.Error($"Build finished in {stepCounter.Total} steps. Command results: {stepCounter.Get(ResultStatus.Successful)} succeeded, {stepCounter.Get(ResultStatus.NotTriggeredWasSuccessful)} up-to-date, {stepCounter.Get(ResultStatus.Failed)} failed, {stepCounter.Get(ResultStatus.NotTriggeredPrerequisiteFailed)} not triggered due to previous failure.");
Logger.Error("Build failed.");
result = BuildResultCode.BuildError;
}
else
{
Logger.Info($"Build finished in {stepCounter.Total} steps. Command results: {stepCounter.Get(ResultStatus.Successful)} succeeded, {stepCounter.Get(ResultStatus.NotTriggeredWasSuccessful)} up-to-date, {stepCounter.Get(ResultStatus.Failed)} failed, {stepCounter.Get(ResultStatus.NotTriggeredPrerequisiteFailed)} not triggered due to previous failure.");
Logger.Info("Build is successful.");
result = BuildResultCode.Successful;
}
}
else
{
string modeName;
switch (runMode)
{
case Mode.Clean:
modeName = "Clean";
break;
case Mode.CleanAndDelete:
modeName = "Clean-and-delete";
break;
default:
throw new InvalidOperationException("Builder executed in unknown mode.");
}
if (cancellationTokenSource.IsCancellationRequested)
{
Logger.Error(modeName + " has been cancelled.");
result = BuildResultCode.Cancelled;
}
else if (stepCounter.Get(ResultStatus.Failed) > 0 || stepCounter.Get(ResultStatus.NotTriggeredPrerequisiteFailed) > 0)
{
Logger.Error(modeName + " has failed.");
result = BuildResultCode.BuildError;
}
else
{
Logger.Error(modeName + " has been successfully completed.");
result = BuildResultCode.Successful;
}
}
scheduler = null;
resultMap = null;
IsRunning = false;
if (shouldCloseDatabase)
{
CloseObjectDatabase();
}
return(result);
}
public BuilderContext(FileVersionTracker inputHashes, CommandBuildStep.TryExecuteRemoteDelegate tryExecuteRemote)
{
InputHashes = inputHashes;
TryExecuteRemote = tryExecuteRemote;
}