private static CommandLineArgument FindArgument(CommandLineDefinition definition, string argName)
{
var argObj = definition.FindArgument(argName);
if (argObj == null)
{
throw new UnrecognisedCommandLineArgumentException();
}
return(argObj);
}
/// <summary>
/// Generates the usage information for a given command-line argument set.
/// </summary>
/// <returns>The usage information for the given command-line argument set.</returns>
public string GenerateHelpText(CommandLineDefinition definition, string applicationName, string applicationDescription)
{
var helpText = new StringBuilder();
helpText.AppendLine(applicationDescription);
helpText.AppendLine();
helpText.Append(applicationName);
foreach (var arg in (from a in definition where a.Required orderby a.ShortName select a))
{
helpText.AppendFormat(" -{0}", arg.ShortName);
if (arg.RequiresValue)
{
helpText.Append(" \"value\"");
}
}
foreach (var arg in (from a in definition where !a.Required orderby a.ShortName select a))
{
helpText.Append(" [");
helpText.AppendFormat("-{0}", arg.ShortName);
if (arg.RequiresValue)
{
helpText.Append(" \"value\"");
}
helpText.Append("]");
}
helpText.AppendLine();
helpText.AppendLine();
var longestShortName = (from arg in definition select arg.ShortName.Length).Max() * -1;
var longestLongName = (from arg in definition select arg.LongName.Length).Max() * -1;
var formatString = string.Format(" {{0}} -{{1,{0}}} --{{2,{1}}} {{3}}{{4}}", longestShortName, longestLongName);
foreach (var arg in definition.OrderByDescending(a => a.Required).ThenBy(a => a.ShortName))
{
helpText.AppendFormat(formatString, arg.Required ? "R" : " ", arg.ShortName, arg.LongName, arg.Description, Environment.NewLine);
}
return(helpText.ToString());
}
/// <summary>
/// Parses a collection of command-line parameters.
/// </summary>
/// <param name="definition">The definition that the command-line arguments must correspond to.</param>
/// <param name="args">The arguments to parse.</param>
/// <returns>The parsed argument values.</returns>
public Dictionary <string, string> Parse(CommandLineDefinition definition, IEnumerable <string> args)
{
var argValues = new Dictionary <string, string>();
var enumerator = args.GetEnumerator();
while (enumerator.MoveNext())
{
var arg = enumerator.Current;
if (string.IsNullOrEmpty(arg))
{
continue;
}
var argName = ParseArgumentName(arg);
var argObj = FindArgument(definition, argName);
var argValue = ParseArgumentValue(argObj, enumerator);
argValues.Add(argObj.LongName, argValue);
}
EnsureRequiredArgumentsPresent(definition, argValues);
return(argValues);
}
/// <summary>
/// Parses a collection of command-line parameters.
/// </summary>
/// <param name="definition">The definition that the command-line arguments must correspond to.</param>
/// <param name="args">The arguments to parse.</param>
/// <returns>The parsed argument values.</returns>
public object Parse(CommandLineDefinition definition, string args)
{
return(Parse(definition, Split(args)));
}
