public static Option Parse(string optionDescription)
{
if (optionDescription == null) throw new ArgumentNullException("optionDescription");
string shortName = null;
string longName = null;
var argCount = 0;
var value = new ValueObject(false);
var p = new StringPartition(optionDescription, DESC_SEPARATOR);
var options = p.LeftString;
var description = p.RightString;
foreach (var s in options.Split(" \t,=".ToCharArray(), StringSplitOptions.RemoveEmptyEntries))
{
if (s.StartsWith("--"))
longName = s;
else if (s.StartsWith("-"))
{
shortName = s;
}
else
{
argCount = 1;
}
}
if (argCount > 0)
{
var r = new Regex(@"\[default: (.*)\]", RegexOptions.IgnoreCase);
var m = r.Match(description);
value = m.Success ? new ValueObject(m.Groups[1].Value) : null;
}
return new Option(shortName, longName, argCount, value);
}
internal static string FormalUsage(string exitUsage)
{
var section = new StringPartition(exitUsage, ":").RightString; // drop "usage:"
var pu = section.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
var join = new StringBuilder();
join.Append("( ");
for (var i = 1; i < pu.Length; i++)
{
var s = pu[i];
if (i > 1)
{
join.Append(" ");
}
join.Append(s == pu[0] ? ") | (" : s);
}
join.Append(" )");
return(join.ToString());
}
public static Option Parse(string optionDescription)
{
if (optionDescription == null)
{
throw new ArgumentNullException("optionDescription");
}
string shortName = null;
string longName = null;
var argCount = 0;
var value = new ValueObject(false);
var p = new StringPartition(optionDescription, DESC_SEPARATOR);
var options = p.LeftString;
var description = p.RightString;
foreach (var s in options.Split(" \t,=".ToCharArray(), StringSplitOptions.RemoveEmptyEntries))
{
if (s.StartsWith("--"))
{
longName = s;
}
else if (s.StartsWith("-"))
{
shortName = s;
}
else
{
argCount = 1;
}
}
if (argCount > 0)
{
var r = new Regex(@"\[default: (.*)\]", RegexOptions.IgnoreCase);
var m = r.Match(description);
value = m.Success ? new ValueObject(m.Groups[1].Value) : null;
}
return(new Option(shortName, longName, argCount, value));
}
internal static ICollection <Option> ParseDefaults(string doc)
{
var defaults = new List <Option>();
foreach (var s in ParseSection("options:", doc))
{
// FIXME corner case "bla: options: --foo"
var p = new StringPartition(s, ":"); // get rid of "options:"
var optionsText = p.RightString;
var a = Regex.Split("\n" + optionsText, @"\r?\n[ \t]*(-\S+?)");
var split = new List <string>();
for (var i = 1; i < a.Length - 1; i += 2)
{
var s1 = a[i];
var s2 = a[i + 1];
split.Add(s1 + s2);
}
var options = split.Where(x => x.StartsWith("-")).Select(x => Option.Parse(x));
defaults.AddRange(options);
}
return(defaults);
}
internal static ICollection<Option> ParseDefaults(string doc)
{
var defaults = new List<Option>();
foreach (var s in ParseSection("options:", doc))
{
// FIXME corner case "bla: options: --foo"
var p = new StringPartition(s, ":"); // get rid of "options:"
var optionsText = p.RightString;
var a = Regex.Split("\n" + optionsText, @"\r?\n[ \t]*(-\S+?)");
var split = new List<string>();
for (int i = 1; i < a.Length - 1; i += 2)
{
var s1 = a[i];
var s2 = a[i + 1];
split.Add(s1 + s2);
}
var options = split.Where(x => x.StartsWith("-")).Select(x => Option.Parse(x));
defaults.AddRange(options);
}
return defaults;
}
private static IEnumerable<Pattern> ParseLong(Tokens tokens, ICollection<Option> options)
{
// long ::= '--' chars [ ( ' ' | '=' ) chars ] ;
var p = new StringPartition(tokens.Move(), "=");
var longName = p.LeftString;
Debug.Assert(longName.StartsWith("--"));
var value = (p.NoSeparatorFound) ? null : new ValueObject(p.RightString);
var similar = options.Where(o => o.LongName == longName).ToList();
if (tokens.ThrowsInputError && similar.Count == 0)
{
// If not exact match
similar =
options.Where(o => !String.IsNullOrEmpty(o.LongName) && o.LongName.StartsWith(longName)).ToList();
}
if (similar.Count > 1)
{
// Might be simply specified ambiguously 2+ times?
throw tokens.CreateException(string.Format("{0} is not a unique prefix: {1}?", longName,
string.Join(", ", similar.Select(o => o.LongName))));
}
Option option = null;
if (similar.Count < 1)
{
var argCount = p.Separator == "=" ? 1 : 0;
option = new Option(null, longName, argCount);
options.Add(option);
if (tokens.ThrowsInputError)
option = new Option(null, longName, argCount, argCount != 0 ? value : new ValueObject(true));
}
else
{
option = new Option(similar[0].ShortName, similar[0].LongName, similar[0].ArgCount, similar[0].Value);
if (option.ArgCount == 0)
{
if (value != null)
throw tokens.CreateException(option.LongName + " must not have an argument");
}
else
{
if (value == null)
{
if (tokens.Current() == null || tokens.Current() == "--")
throw tokens.CreateException(option.LongName + " requires an argument");
value = new ValueObject(tokens.Move());
}
}
if (tokens.ThrowsInputError)
option.Value = value ?? new ValueObject(true);
}
return new[] {option};
}
internal static string FormalUsage(string exitUsage)
{
var section = new StringPartition(exitUsage, ":").RightString; // drop "usage:"
var pu = section.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
var join = new StringBuilder();
join.Append("( ");
for (int i = 1; i < pu.Length; i++)
{
var s = pu[i];
if (i > 1) join.Append(" ");
join.Append((s == pu[0]) ? ") | (" : s);
}
join.Append(" )");
return join.ToString();
}
private static IEnumerable <Pattern> ParseLong(Tokens tokens, ICollection <Option> options)
{
// long ::= '--' chars [ ( ' ' | '=' ) chars ] ;
var p = new StringPartition(tokens.Move(), "=");
var longName = p.LeftString;
Debug.Assert(longName.StartsWith("--"));
var value = (p.NoSeparatorFound) ? null : new ValueObject(p.RightString);
var similar = options.Where(o => o.LongName == longName).ToList();
if (tokens.ThrowsInputError && similar.Count == 0)
{
// If not exact match
similar =
options.Where(o => !string.IsNullOrEmpty(o.LongName) && o.LongName.StartsWith(longName)).ToList();
}
if (similar.Count > 1)
{
// Might be simply specified ambiguously 2+ times?
throw tokens.CreateException($"{longName} is not a unique prefix: {string.Join(", ", similar.Select(o => o.LongName))}?");
}
Option option = null;
if (similar.Count < 1)
{
var argCount = p.Separator == "=" ? 1 : 0;
option = new Option(null, longName, argCount);
options.Add(option);
if (tokens.ThrowsInputError)
{
option = new Option(null, longName, argCount, argCount != 0 ? value : new ValueObject(true));
}
}
else
{
option = new Option(similar[0].ShortName, similar[0].LongName, similar[0].ArgCount, similar[0].Value);
if (option.ArgCount == 0)
{
if (value != null)
{
throw tokens.CreateException(option.LongName + " must not have an argument");
}
}
else
{
if (value == null)
{
if (tokens.Current() == null || tokens.Current() == "--")
{
throw tokens.CreateException(option.LongName + " requires an argument");
}
value = new ValueObject(tokens.Move());
}
}
if (tokens.ThrowsInputError)
{
option.Value = value ?? new ValueObject(true);
}
}
return(new[] { option });
}