public void Parse(ArgumentSyntax syntax, Preprocessor preprocessor)
{
// Global options
if (GlobalArguments)
{
syntax.DefineOption("v|verbose", ref _verbose, "Turns on verbose output showing additional trace message useful for debugging.");
syntax.DefineOption("attach", ref _attach, "Pause execution at the start of the program until a debugger is attached.");
}
// Command options
ParseOptions(syntax);
// Directives
if (SupportedDirectives != null)
{
foreach (IDirective directive in preprocessor.Directives
.Where(x => SupportedDirectives.Contains(x.Name, StringComparer.OrdinalIgnoreCase)))
{
// Get the option name and help text
string optionName = (string.IsNullOrEmpty(directive.ShortName) ? string.Empty : directive.ShortName + "|") + directive.Name;
string optionHelp = $"{directive.Description}{(string.IsNullOrEmpty(directive.GetHelpText()) ? string.Empty : " See below for syntax details.")}";
// Single or multiple?
if (directive.SupportsMultiple)
{
// Multiple
IReadOnlyList <string> directiveValues = null;
syntax.DefineOptionList(optionName, ref directiveValues, optionHelp);
if (directiveValues != null)
{
foreach (string directiveValue in directiveValues)
{
preprocessor.AddValue(new DirectiveValue(directive.Name, directiveValue));
}
}
}
else
{
// Single
string directiveValue = null;
syntax.DefineOption(optionName, ref directiveValue, optionHelp);
if (directiveValue != null)
{
preprocessor.AddValue(new DirectiveValue(directive.Name, directiveValue));
}
}
}
}
// Command parameters
ParseParameters(syntax);
}
public bool ParseArgs(string[] args, Preprocessor preprocessor, out bool hasErrors)
{
System.CommandLine.ArgumentSyntax parsed = System.CommandLine.ArgumentSyntax.Parse(args, syntax =>
{
// Any changes here should also be made in Cake.Wyam
if (syntax.DefineOption("help-directives", ref HelpDirectives, "Displays help for the various preprocessor directives.").IsSpecified)
{
// Don't care about anything else
return;
}
syntax.DefineOption("w|watch", ref Watch, "Watches the input folder for any changes.");
Preview = syntax.DefineOption("p|preview", ref PreviewPort, false, "Start the preview web server on the specified port (default is " + PreviewPort + ").").IsSpecified;
if (syntax.DefineOption("force-ext", ref PreviewForceExtension, "Force the use of extensions in the preview web server (by default, extensionless URLs may be used).").IsSpecified&& !Preview)
{
syntax.ReportError("force-ext can only be specified if the preview server is running.");
}
if (syntax.DefineOption("preview-root", ref PreviewRoot, DirectoryPath.FromString, "The path to the root of the preview server, if not the output folder.").IsSpecified&& !Preview)
{
syntax.ReportError("preview-root can only be specified if the preview server is running.");
}
syntax.DefineOptionList("i|input", ref InputPaths, DirectoryPath.FromString, "The path(s) of input files, can be absolute or relative to the current folder.");
syntax.DefineOption("o|output", ref OutputPath, DirectoryPath.FromString, "The path to output files, can be absolute or relative to the current folder.");
syntax.DefineOption("c|config", ref ConfigFilePath, FilePath.FromString, "Configuration file (by default, config.wyam is used).");
syntax.DefineOption("u|update-packages", ref UpdatePackages, "Check the NuGet server for more recent versions of each package and update them if applicable.");
syntax.DefineOption("use-local-packages", ref UseLocalPackages, "Toggles the use of a local NuGet packages folder.");
syntax.DefineOption("packages-path", ref PackagesPath, DirectoryPath.FromString, "The packages path to use (only if use-local is true).");
syntax.DefineOption("output-script", ref OutputScript, "Outputs the config script after it's been processed for further debugging.");
syntax.DefineOption("verify-config", ref VerifyConfig, false, "Compile the configuration but do not execute.");
syntax.DefineOption("noclean", ref NoClean, "Prevents cleaning of the output path on each execution.");
syntax.DefineOption("nocache", ref NoCache, "Prevents caching information during execution (less memory usage but slower execution).");
syntax.DefineOption("v|verbose", ref Verbose, "Turns on verbose output showing additional trace message useful for debugging.");
syntax.DefineOption("pause", ref Pause, "Pause execution at the start of the program until a key is pressed (useful for attaching a debugger).");
syntax.DefineOptionList("meta", ref GlobalMetadataArgs, "Specifies global metadata which can be accessed from the engine or config file (--meta key=value).");
LogFilePath = $"wyam-{DateTime.Now:yyyyMMddHHmmssfff}.txt";
if (!syntax.DefineOption("l|log", ref LogFilePath, FilePath.FromString, false, "Log all trace messages to the specified log file (by default, wyam-[datetime].txt).").IsSpecified)
{
LogFilePath = null;
}
foreach (IDirective directive in preprocessor.Directives.Where(x => x.SupportsCli))
{
IReadOnlyList <string> directiveValues = null;
syntax.DefineOptionList(directive.DirectiveNames.First(), ref directiveValues, $"{directive.Description} See below for syntax details.");
if (directiveValues != null)
{
foreach (string directiveValue in directiveValues)
{
preprocessor.AddValue(new DirectiveValue(directive.DirectiveNames.First(), directiveValue));
}
}
}
if (syntax.DefineParameter("root", ref RootPath, DirectoryPath.FromString, "The folder (or config file) to use.").IsSpecified)
{
// If a root folder was defined, but it actually points to a file, set the root folder to the directory
// and use the specified file as the config file (if a config file was already specified, it's an error)
FilePath rootDirectoryPathAsConfigFile = new DirectoryPath(Environment.CurrentDirectory).CombineFile(RootPath.FullPath);
if (File.Exists(rootDirectoryPathAsConfigFile.FullPath))
{
// The specified root actually points to a file...
if (ConfigFilePath != null)
{
syntax.ReportError("A config file was both explicitly specified and specified in the root folder.");
}
else
{
ConfigFilePath = rootDirectoryPathAsConfigFile.FileName;
RootPath = rootDirectoryPathAsConfigFile.Directory;
}
}
}
});
hasErrors = parsed.HasErrors;
// Set verbose tracing
if (Verbose)
{
Trace.Level = System.Diagnostics.SourceLevels.Verbose;
}
// Capture any stdin, but we have to be very careful because the calling process might have
// opened stdin and just left it open, in which case it would register as redirected but the
// stream won't ever return because it's just waiting for input
if (Console.IsInputRedirected)
{
Trace.Verbose("Input is redirected, attempting to read...");
using (Stream stream = Console.OpenStandardInput())
{
byte[] buffer = new byte[1000];
StringBuilder stdin = new StringBuilder();
int totalRead = 0;
int read = -1;
while (true)
{
AutoResetEvent gotInput = new AutoResetEvent(false);
Thread inputThread = new Thread(() =>
{
try
{
read = stream.Read(buffer, 0, buffer.Length);
gotInput.Set();
}
catch (ThreadAbortException)
{
Thread.ResetAbort();
}
})
{
IsBackground = true
};
inputThread.Start();
// Timeout expired?
if (!gotInput.WaitOne(100))
{
inputThread.Abort();
Trace.Verbose("Timeout expired while reading from input");
break;
}
// End of stream?
if (read == 0)
{
Stdin = stdin.ToString();
Trace.Verbose($"Read {totalRead} bytes ({Stdin.Length} characters) from input");
break;
}
// Got data
stdin.Append(Console.InputEncoding.GetString(buffer, 0, read));
totalRead += read;
}
}
}
if (parsed.IsHelpRequested())
{
foreach (IDirective directive in preprocessor.Directives.Where(x => x.SupportsCli))
{
Console.WriteLine($"--{directive.DirectiveNames.First()} usage:");
Console.WriteLine();
Console.WriteLine(directive.GetHelpText());
Console.WriteLine();
}
}
return(!(parsed.IsHelpRequested() || hasErrors));
}
