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CommandLine.cs
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CommandLine.cs
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/* FusionLogConfigurator - a .NET Fusion log configuration utility
* Copyright (C) 2012 Stephan Müller
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
namespace FusLogConfig
{
internal class CommandLine
{
private static readonly Regex ForceLogPattern = new Regex(@"^/force(\+|\-)$");
private static readonly Regex FailuresLogPattern = new Regex(@"^/failures(\+|\-)$");
private static readonly Regex PathPattern = new Regex(@"^/path\:(.*)$");
private static readonly Regex ResourcesPattern = new Regex(@"^/resources(\+|\-)$");
public static string Format(FusionLogConfiguration configuration)
{
var arguments = new[]
{
"/force" + (configuration.ForceLog ? '+' : '-'),
"/failures" + (configuration.LogFailures ? '+' : '-'),
"/resources" + (configuration.LogResourceBinds ? '+' : '-'),
"\"/path:" + (configuration.LogDirectory ?? "") + "\""
};
return string.Join(" ", arguments);
}
private delegate bool OptionParse(string arg);
public static FusionLogConfiguration Parse(string[] args)
{
var delta = new FusionLogConfiguration();
foreach(var arg in args)
{
ParseOption(arg, delta);
}
return delta;
}
private static void ParseOption(string arg, FusionLogConfiguration delta)
{
foreach(var parse in OptionParses(delta))
{
if (parse(arg)) return;
}
}
private static IEnumerable<OptionParse> OptionParses(FusionLogConfiguration delta)
{
{
yield return FlagParse(ForceLogPattern, f => delta.ForceLog = f);
yield return FlagParse(FailuresLogPattern, f => delta.LogFailures = f);
yield return FlagParse(ResourcesPattern, f => delta.LogResourceBinds = f);
yield return StringParse(PathPattern, s => delta.LogDirectory = s);
}
}
private static OptionParse FlagParse(Regex pattern, Action<bool> flagConsumer)
{
return arg =>
{
var match = pattern.Match(arg);
if(match.Success)
{
var flag = match.Groups[1].Value == "+";
flagConsumer(flag);
return true;
}
return false;
};
}
private static OptionParse StringParse(Regex pattern, Action<string > stringConsumer)
{
return arg =>
{
var match = pattern.Match(arg);
if (match.Success)
{
var flag = match.Groups[1].Value;
stringConsumer(flag);
return true;
}
return false;
};
}
}
}