protected override async Task <int> ExecuteEngineAsync(
CommandContext commandContext,
ServeCommandSettings commandSettings,
IEngineManager engineManager)
{
ExitCode exitCode = ExitCode.Normal;
ILogger logger = engineManager.Engine.Services.GetRequiredService <ILogger <Bootstrapper> >();
// Set folders
IFileSystem fileSystem = engineManager.Engine.FileSystem;
NormalizedPath currentDirectory = Environment.CurrentDirectory;
IDirectory serveDirectory;
if (string.IsNullOrEmpty(commandSettings.RootPath))
{
fileSystem.RootPath = currentDirectory;
serveDirectory = fileSystem.GetOutputDirectory();
}
else
{
fileSystem.RootPath = currentDirectory.Combine(commandSettings.RootPath);
serveDirectory = fileSystem.GetRootDirectory();
}
Dictionary <string, string> contentTypes = commandSettings.ContentTypes?.Length > 0
? PreviewCommand.GetContentTypes(commandSettings.ContentTypes)
: new Dictionary <string, string>();
ILoggerProvider loggerProvider = engineManager.Engine.Services.GetRequiredService <ILoggerProvider>();
Server previewServer = null;
FileSystemWatcher serveFolderWatcher = null;
if (serveDirectory.Exists)
{
// Starts Preview server
previewServer = await PreviewCommand.StartPreviewServerAsync(
serveDirectory.Path,
commandSettings.Port,
commandSettings.ForceExt,
commandSettings.VirtualDirectory,
!commandSettings.NoReload,
contentTypes,
loggerProvider,
logger);
// Start the watchers
if (!commandSettings.NoReload)
{
logger.LogInformation("Watching path {0}", serveDirectory.Path);
serveFolderWatcher = new FileSystemWatcher(serveDirectory.Path.FullPath, "*.*")
{
IncludeSubdirectories = true,
EnableRaisingEvents = true
};
serveFolderWatcher.Changed += OnFileChanged;
serveFolderWatcher.Created += OnFileChanged;
}
// Start the message pump
CommandUtilities.WaitForControlC(
() =>
{
_exit.Set();
_messageEvent.Set();
},
logger);
// 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>();
while (_changedFiles.TryDequeue(out string changedFile))
{
if (changedFiles.Add(changedFile))
{
logger.LogDebug($"{changedFile} has changed");
}
}
if (changedFiles.Count > 0)
{
logger.LogInformation($"{changedFiles.Count} files have changed, re-loading");
await previewServer.TriggerReloadAsync();
}
// Check one more time for exit
if (_exit)
{
break;
}
logger.LogInformation("Hit Ctrl-C to exit");
_messageEvent.Reset();
}
}
else
{
logger.LogError($"Directory {serveDirectory.Path} does not exist.");
}
// Shutdown
logger.LogInformation("Shutting down");
if (serveFolderWatcher != null)
{
serveFolderWatcher.EnableRaisingEvents = false;
serveFolderWatcher.Changed -= OnFileChanged;
serveFolderWatcher.Created -= OnFileChanged;
serveFolderWatcher.Dispose();
}
previewServer?.Dispose();
return((int)exitCode);
}
protected override async Task <int> ExecuteEngineAsync(
CommandContext commandContext,
PreviewCommandSettings commandSettings,
IEngineManager engineManager)
{
SetPipelines(commandContext, commandSettings, engineManager);
ExitCode exitCode = ExitCode.Normal;
ILogger logger = engineManager.Engine.Services.GetRequiredService <ILogger <Bootstrapper> >();
// Execute the engine for the first time
using (CancellationTokenSource cancellationTokenSource = new CancellationTokenSource())
{
if (!await engineManager.ExecuteAsync(cancellationTokenSource))
{
return((int)ExitCode.ExecutionError);
}
}
// Start the preview server
Dictionary <string, string> contentTypes = commandSettings.ContentTypes?.Length > 0
? GetContentTypes(commandSettings.ContentTypes)
: new Dictionary <string, string>();
ILoggerProvider loggerProvider = engineManager.Engine.Services.GetRequiredService <ILoggerProvider>();
IDirectory outputDirectory = engineManager.Engine.FileSystem.GetOutputDirectory();
Server previewServer = null;
if (outputDirectory.Exists)
{
previewServer = await StartPreviewServerAsync(
outputDirectory.Path,
commandSettings.Port,
commandSettings.ForceExt,
commandSettings.VirtualDirectory,
!commandSettings.NoReload,
contentTypes,
loggerProvider,
logger);
}
// Start the watchers
ActionFileSystemWatcher inputFolderWatcher = null;
if (!commandSettings.NoWatch)
{
logger.LogInformation("Watching paths(s) {0}", string.Join(", ", engineManager.Engine.FileSystem.InputPaths));
inputFolderWatcher = new ActionFileSystemWatcher(
outputDirectory.Path,
engineManager.Engine.FileSystem.GetInputDirectories().Select(x => x.Path),
true,
"*.*",
path =>
{
_changedFiles.Enqueue(path);
_messageEvent.Set();
});
}
// Start the message pump
CommandUtilities.WaitForControlC(
() =>
{
_exit.Set();
_messageEvent.Set();
},
logger);
// 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>();
while (_changedFiles.TryDequeue(out string changedFile))
{
if (changedFiles.Add(changedFile))
{
logger.LogDebug($"{changedFile} has changed");
}
}
if (changedFiles.Count > 0)
{
logger.LogInformation($"{changedFiles.Count} files have changed, re-executing");
// Reset caches when an error occurs during the previous preview
string existingResetCacheSetting = null;
bool setResetCacheSetting = false;
if (exitCode == ExitCode.ExecutionError)
{
existingResetCacheSetting = engineManager.Engine.Settings.GetString(Keys.ResetCache);
setResetCacheSetting = true;
ConfigurationSettings[Keys.ResetCache] = "true";
}
// If there was an execution error due to reload, keep previewing but clear the cache
using (CancellationTokenSource cancellationTokenSource = new CancellationTokenSource())
{
exitCode = await engineManager.ExecuteAsync(cancellationTokenSource)
? ExitCode.Normal
: ExitCode.ExecutionError;
}
// Reset the reset cache setting after removing it
if (setResetCacheSetting)
{
if (existingResetCacheSetting == null)
{
ConfigurationSettings.Remove(Keys.ResetCache);
}
{
ConfigurationSettings[Keys.ResetCache] = existingResetCacheSetting;
}
}
if (previewServer == null)
{
if (outputDirectory.Exists)
{
previewServer = await StartPreviewServerAsync(
outputDirectory.Path,
commandSettings.Port,
commandSettings.ForceExt,
commandSettings.VirtualDirectory,
!commandSettings.NoReload,
contentTypes,
loggerProvider,
logger);
}
}
else
{
await previewServer.TriggerReloadAsync();
}
}
// Check one more time for exit
if (_exit)
{
break;
}
logger.LogInformation("Hit Ctrl-C to exit");
_messageEvent.Reset();
}
// Shutdown
logger.LogInformation("Shutting down");
inputFolderWatcher?.Dispose();
previewServer?.Dispose();
return((int)exitCode);
}