/// <summary>
/// Builds a string that contains a parsing error message.
/// </summary>
/// <param name="options">
/// An options target <see cref="CommandLineOptionsBase"/> instance that collected command line arguments parsed with the <see cref="CommandLineParser"/> class.
/// </param>
/// <param name="indent"> </param>
/// <returns>
/// The <see cref="System.String"/> that contains the parsing error message.
/// </returns>
public string RenderParsingErrorsText(CommandLineOptionsBase options, int indent)
{
if (options == null) throw new ArgumentNullException("options");
if (options.InternalLastPostParsingState.Errors.Count == 0)
{
return string.Empty;
}
var text = new StringBuilder();
foreach (var e in options.InternalLastPostParsingState.Errors)
{
var line = new StringBuilder();
line.Append(new String(' ', indent));
if (!string.IsNullOrWhiteSpace(e.BadOption.ShortName))
{
line.Append('-');
line.Append(e.BadOption.ShortName);
if (!string.IsNullOrWhiteSpace(e.BadOption.LongName)) line.Append('/');
}
if (!string.IsNullOrWhiteSpace(e.BadOption.LongName))
{
line.Append("--");
line.Append(e.BadOption.LongName);
}
line.Append(" ");
line.Append(e.ViolatesRequired
? SentenceBuilder.RequiredOptionMissingText
: SentenceBuilder.OptionWord);
if (e.ViolatesFormat)
{
line.Append(" ");
line.Append(SentenceBuilder.ViolatesFormatText);
}
if (e.ViolatesMutualExclusiveness)
{
if (e.ViolatesFormat || e.ViolatesRequired)
{
line.Append(" ");
line.Append(SentenceBuilder.AndWord);
}
line.Append(" ");
line.Append(SentenceBuilder.ViolatesMutualExclusivenessText);
}
line.Append('.');
text.AppendLine(line.ToString());
}
return text.ToString();
}
public static void DefaultParsingErrorsHandler(CommandLineOptionsBase options, HelpText current)
{
if (options == null) throw new ArgumentNullException("options");
if (current == null) throw new ArgumentNullException("current");
if (options.InternalLastPostParsingState.Errors.Count <= 0)
return;
var errors = current.RenderParsingErrorsText(options, 2); // indent with two spaces
if (string.IsNullOrWhiteSpace(errors))
return;
current.AddPreOptionsLine(string.Concat(Environment.NewLine, current.SentenceBuilder.ErrorsHeadingText));
var lines = errors.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
foreach (var line in lines) { current.AddPreOptionsLine(line); }
}