// Returns the parsed command line. If ErrorDescription is non-null, then the parse failed.
internal static CommandLineOptions ParseCommandLine(string[] args)
{
var result = new CommandLineOptions();
result.ParseCommandLineStrings(args);
// Convert the language strings to language values.
var languageTokenizer = new CommandlineTokenizer <Language>(Language.Ambiguous)
.AddKeyword(Language.CSharp)
.AddKeyword(Language.Cx, "cppcx")
.AddKeyword(Language.Cx)
.AddKeyword(Language.Cppwinrt)
.AddKeyword(Language.Cppwinrt, "winrtcpp")
.AddKeyword(Language.LottieYaml)
.AddKeyword(Language.WinCompDgml, "dgml")
.AddKeyword(Language.Stats);
var languages = new List <Language>();
// Parse the language string.
foreach (var languageString in result._languageStrings)
{
languageTokenizer.TryMatchKeyword(languageString, out var language);
languages.Add(language);
switch (language)
{
case Language.Unknown:
result.ErrorDescription = $"Unrecognized language: {languageString}";
break;
case Language.Ambiguous:
result.ErrorDescription = $"Ambiguous language: {languageString}";
break;
}
}
result.Languages = languages.Distinct().ToArray();
// Sort any additional interfaces and remove duplicates.
var additionalInterfaces = result._additionalInterfaces.OrderBy(name => name).Distinct().ToArray();
result._additionalInterfaces.Clear();
result._additionalInterfaces.AddRange(additionalInterfaces);
return(result);
}
void ParseCommandLineStrings(string[] args)
{
// Define the keywords accepted on the command line.
var tokenizer = new CommandlineTokenizer <Keyword>(ambiguousValue: Keyword.Ambiguous)
.AddPrefixedKeyword(Keyword.AdditionalInterface)
.AddPrefixedKeyword(Keyword.DisableCodeGenOptimizer)
.AddPrefixedKeyword(Keyword.DisableTranslationOptimizer)
.AddPrefixedKeyword(Keyword.GenerateColorBindings)
.AddPrefixedKeyword(Keyword.GenerateDependencyObject)
.AddPrefixedKeyword(Keyword.Help, "?")
.AddPrefixedKeyword(Keyword.Help)
.AddPrefixedKeyword(Keyword.InputFile)
.AddPrefixedKeyword(Keyword.Interface)
.AddPrefixedKeyword(Keyword.Language)
.AddPrefixedKeyword(Keyword.MinimumUapVersion)
.AddPrefixedKeyword(Keyword.Namespace)
.AddPrefixedKeyword(Keyword.OutputFolder)
.AddPrefixedKeyword(Keyword.Public)
.AddPrefixedKeyword(Keyword.RootNamespace)
.AddPrefixedKeyword(Keyword.Strict)
.AddPrefixedKeyword(Keyword.TargetUapVersion)
.AddPrefixedKeyword(Keyword.TestMode)
.AddPrefixedKeyword(Keyword.WinUIVersion);
// The last keyword recognized. This defines what the following parameter value is for,
// or None if not expecting a parameter value.
var previousKeyword = Keyword.None;
foreach (var(keyword, arg) in tokenizer.Tokenize(args))
{
var prev = previousKeyword;
previousKeyword = Keyword.None;
switch (prev)
{
case Keyword.None:
// Expecting a keyword.
switch (keyword)
{
case Keyword.Ambiguous:
ErrorDescription = $"Ambiguous: \"{arg}\".";
return;
case Keyword.None:
ErrorDescription = $"Unexpected: \"{arg}\".";
return;
case Keyword.GenerateColorBindings:
GenerateColorBindings = true;
break;
case Keyword.GenerateDependencyObject:
GenerateDependencyObject = true;
break;
case Keyword.Help:
HelpRequested = true;
return;
case Keyword.Strict:
StrictMode = true;
break;
case Keyword.TestMode:
TestMode = true;
break;
case Keyword.DisableCodeGenOptimizer:
DisableCodeGenOptimizer = true;
break;
case Keyword.DisableTranslationOptimizer:
DisableTranslationOptimizer = true;
break;
case Keyword.Public:
Public = true;
break;
// The following keywords require a parameter as the next token.
case Keyword.AdditionalInterface:
case Keyword.InputFile:
case Keyword.Interface:
case Keyword.Language:
case Keyword.Namespace:
case Keyword.OutputFolder:
case Keyword.MinimumUapVersion:
case Keyword.RootNamespace:
case Keyword.TargetUapVersion:
case Keyword.WinUIVersion:
previousKeyword = keyword;
break;
default:
// Should never get here.
throw new InvalidOperationException();
}
break;
case Keyword.AdditionalInterface:
_additionalInterfaces.Add(arg);
previousKeyword = Keyword.None;
break;
case Keyword.InputFile:
if (InputFile != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Input");
return;
}
InputFile = arg;
previousKeyword = Keyword.None;
break;
case Keyword.Language:
_languageStrings.Add(arg);
previousKeyword = Keyword.None;
break;
case Keyword.Namespace:
if (Namespace != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Namespace");
return;
}
Namespace = arg;
previousKeyword = Keyword.None;
break;
case Keyword.OutputFolder:
if (OutputFolder != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Output folder");
return;
}
OutputFolder = arg;
previousKeyword = Keyword.None;
break;
case Keyword.MinimumUapVersion:
if (MinimumUapVersion != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Minimum UAP version");
return;
}
{
if (!uint.TryParse(arg, out var version))
{
ErrorDescription = ArgumentMustBeAPositiveInteger("Minimum UAP version");
return;
}
MinimumUapVersion = version;
}
previousKeyword = Keyword.None;
break;
case Keyword.RootNamespace:
if (RootNamespace != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Output folder");
return;
}
RootNamespace = arg;
previousKeyword = Keyword.None;
break;
case Keyword.TargetUapVersion:
if (TargetUapVersion != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("Target UAP version");
return;
}
{
if (!uint.TryParse(arg, out var version))
{
ErrorDescription = ArgumentMustBeAPositiveInteger("Target UAP version");
return;
}
TargetUapVersion = version;
}
previousKeyword = Keyword.None;
break;
case Keyword.WinUIVersion:
if (_winUIVersion != null)
{
ErrorDescription = ArgumentSpecifiedMoreThanOnce("WinUI version");
return;
}
{
if (!Version.TryParse(arg, out var version))
{
ErrorDescription = ArgumentMustBeAMajorAndMinorVerion("WinUI version");
return;
}
_winUIVersion = version;
}
previousKeyword = Keyword.None;
break;
default:
// Should never get here.
throw new InvalidOperationException();
}
}
// All tokens consumed. Ensure we are not waiting for the final parameter value.
if (previousKeyword != Keyword.None)
{
ErrorDescription = "Missing value.";
}
}