LaunchArgumentParser.UnknownArguments

DTLib/Console/LaunchArgumentParser.cs

@@ -3,7 +3,10 @@ namespace DTLib.Console;
 public class LaunchArgumentParser
 {
     public string HelpMessageHeader = "USAGE:";
-    public bool IsAllowedNoArguments;
+    public bool AllowedNoArguments;
+    public bool AllowedUnknownArguments;
+    // ReSharper disable once CollectionNeverQueried.Global
+    public readonly List<string> UnknownArguments = new();
     
     private readonly Dictionary<string, LaunchArgument> argDict = new();
     private readonly List<LaunchArgument> argList = new();
@@ -43,7 +46,13 @@ public class LaunchArgumentParser
     
     public LaunchArgumentParser AllowNoArguments()
     {
-        IsAllowedNoArguments = true;
+        AllowedNoArguments = true;
+        return this;
+    }
+    
+    public LaunchArgumentParser AllowUnknownArguments()
+    {
+        AllowedUnknownArguments = true;
         return this;
     }
 
@@ -62,7 +71,8 @@ public class LaunchArgumentParser
     public string CreateHelpArgMessage(string argAlias)
     {
         StringBuilder b = new();
-        var arg = ParseArg(argAlias);
+        if(!TryParseArg(argAlias, out var arg))
+            throw new Exception($"unknown argument '{argAlias}'");
         arg.AppendHelpInfo(b);
         return b.ToString();
     }
@@ -74,16 +84,13 @@ public class LaunchArgumentParser
             argDict.Add(alias, arg);
     }
 
-    public LaunchArgument ParseArg(string argAlias)
+    public bool TryParseArg(string argAlias, out LaunchArgument arg)
     {
         // different argument providing patterns
-        if (!argDict.TryGetValue(argAlias, out var arg) && // arg
-            !(argAlias.StartsWith("--") && argDict.TryGetValue(argAlias.Substring(2), out arg)) && // --arg
-            !(argAlias.StartsWith('-') && argDict.TryGetValue(argAlias.Substring(1), out arg)) && // -arg
-            !(argAlias.StartsWith('/') && argDict.TryGetValue(argAlias.Substring(1), out arg))) // /arg
-            throw new Exception($"invalid argument: {argAlias}\n{CreateHelpMessage()}");
-
-        return arg;
+        arg = null!;
+        return argAlias.StartsWith("--") && argDict.TryGetValue(argAlias.Substring(2), out arg) || // --arg
+               argAlias.StartsWith('-') && argDict.TryGetValue(argAlias.Substring(1), out arg) || // -arg
+               argAlias.StartsWith('/') && argDict.TryGetValue(argAlias.Substring(1), out arg); // /arg
     }
 
     /// <param name="args">program launch args</param>
@@ -93,14 +100,19 @@ public class LaunchArgumentParser
     public void ParseAndHandle(string[] args)
     {
         // show help message and throw ExitAfterHelpException
-        if (args.Length == 0 && !IsAllowedNoArguments)
+        if (args.Length == 0 && !AllowedNoArguments)
             HelpHandler();
 
         List<LaunchArgument> execQueue = new();
 
         for (int i = 0; i < args.Length; i++)
         {
-            var arg = ParseArg(args[i]);
+            if (!TryParseArg(args[i], out var arg))
+            {
+                if (!AllowedUnknownArguments)
+                    throw new Exception($"unknown argument '{args[i]}'");
+                UnknownArguments.Add(args[i]);
+            }
             for (int j = 0; j < arg.Params.Length; j++)
             {
                 if (++i >= args.Length)

DTLib/DTLib.csproj

@@ -2,7 +2,7 @@
 	<PropertyGroup>
 		<!--package info-->
 		<PackageId>DTLib</PackageId>
-		<Version>1.7.2</Version>
+		<Version>1.7.3</Version>
 		<Authors>Timerix</Authors>
 		<Description>Library for all my C# projects</Description>
 		<RepositoryType>GIT</RepositoryType>