public static void Preview(Engine engine, NukeBuild build)
{
var _messageEvent = new AutoResetEvent(false);
var _changedFiles = new ConcurrentQueue <string>();
var _exit = new InterlockedBool(false);
// Start the preview server
DirectoryPath previewPath = (NukeBuild.RootDirectory / "output").ToString();
engine.Execute();
var previewServer = PreviewServer.Start(previewPath, 5080, true, null, true, new Dictionary <string, string>());
Trace.Information("Watching paths(s) {0}", string.Join(", ", engine.FileSystem.InputPaths));
var inputFolderWatcher = new ActionFileSystemWatcher(
engine.FileSystem.GetOutputDirectory().Path,
engine.FileSystem.GetInputDirectories().Select(x => x.Path),
true,
"*.*",
path =>
{
_changedFiles.Enqueue(path);
_messageEvent.Set();
});
// Start the message pump if an async process is running
ExitCode exitCode = ExitCode.Normal;
// Only wait for a key if console input has not been redirected, otherwise it's on the caller to exit
if (!Console.IsInputRedirected)
{
// Start the key listening thread
Thread thread = new Thread(() =>
{
Trace.Information("Hit Ctrl-C to exit");
Console.TreatControlCAsInput = true;
while (true)
{
// Would have prefered to use Console.CancelKeyPress, but that bubbles up to calling batch files
// The (ConsoleKey)3 check is to support a bug in VS Code: https://github.com/Microsoft/vscode/issues/9347
ConsoleKeyInfo consoleKey = Console.ReadKey(true);
if (consoleKey.Key == (ConsoleKey)3 || (consoleKey.Key == ConsoleKey.C && (consoleKey.Modifiers & ConsoleModifiers.Control) != 0))
{
_exit.Set();
_messageEvent.Set();
break;
}
}
})
{
IsBackground = true
};
thread.Start();
}
// Wait for activity
while (true)
{
_messageEvent.WaitOne(); // Blocks the current thread until a signal
if (_exit)
{
break;
}
// Execute if files have changed
HashSet <string> changedFiles = new HashSet <string>();
string changedFile;
while (_changedFiles.TryDequeue(out changedFile))
{
if (changedFiles.Add(changedFile))
{
Trace.Verbose("{0} has changed", changedFile);
}
}
if (changedFiles.Count > 0)
{
Trace.Information("{0} files have changed, re-executing", changedFiles.Count);
engine.Execute();
previewServer?.TriggerReloadAsync().GetAwaiter().GetResult();
}
// Check one more time for exit
if (_exit)
{
break;
}
Trace.Information("Hit Ctrl-C to exit");
_messageEvent.Reset();
}
// Shutdown
Trace.Information("Shutting down");
inputFolderWatcher?.Dispose();
previewServer?.Dispose();
}
