new cmdline options for diff-text

diff-text/Program.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Text;
 using DiffMatchPatch;
+using DTLib.Console;
 using DTLib.Filesystem;
 
 namespace diff_text;
@@ -13,14 +14,39 @@ public static class DiffText
         Console.InputEncoding = Encoding.UTF8;
         Console.OutputEncoding = Encoding.UTF8;
 
-        if (args.Length != 2)
+        if (args.Length < 1)
         {
-            Console.WriteLine("usage: [file0] [file1]");
+            Console.WriteLine("too few arguments, use -h to show help ");
             return;
         }
 
-        var _diff = FileDiff(args[0], args[1]);
-        PrintDiff(_diff);
+        try
+        {
+            List<Diff>? diff = null;
+            bool noColors = false;
+            new LaunchArgumentParser(
+                new LaunchArgument(new[] { "s", "string" },
+                    "shows difference of two strings",
+                    (s0, s1) => diff=TextDiff(s0, s1),
+                    "string0", "string1", 1),
+                new LaunchArgument(new[] { "f", "file" },
+                    "shows difference of two text files",
+                    (f0,f1) => diff=FileDiff(f0, f1),
+                    "file0", "file1", 1),
+                new LaunchArgument(new []{"p", "plain-text","no-colors"},
+                    "print diff in plain text format",
+                        ()=> noColors=true, 0)
+            ).ParseAndHandle(args);
+            if (diff == null)
+                throw new Exception("no action specified: use -s or -f");
+            PrintDiff(diff, false, noColors);
+        }
+        catch (LaunchArgumentParser.ExitAfterHelpException)
+        { }
+        catch (Exception ex)
+        {
+            ColoredConsole.WriteLine("r", $"{ex.Message}\n{ex.StackTrace}");
+        }
     }
 
     public static List<Diff> FileDiff(string file0, string file1)
@@ -32,14 +58,40 @@ public static class DiffText
 
     public static List<Diff> TextDiff(string text0, string text1)
     {
-        var diff = Diff.Compute(text0, text1, checklines: true);
+        List<Diff>? diff = Diff.Compute(text0, text1, checklines: false);
+        if (diff is null)
+            throw new NullReferenceException("diff is null");
         diff.CleanupSemantic();
         return diff;
     }
 
-    public static void PrintDiff(List<Diff> diff, bool ignoreWhitespaces = false)
+    public static void PrintDiff(List<Diff> diff, bool ignoreWhitespaces = false, bool noColors = false)
     {
         Console.ResetColor();
+        
+        
+        if (noColors)
+        {
+            StringBuilder b = new();
+            foreach (var patch in Patch.FromDiffs(diff))
+            {
+                b.Append("@@ " + patch.Coordinates + " @@\n");
+                foreach (var patchDiff in patch.Diffs)
+                {
+                    char opChar = patchDiff.Operation switch
+                    {
+                        Operation.Delete => '<',
+                        Operation.Insert => '>',
+                        Operation.Equal => ' ',
+                        _ => throw new ArgumentOutOfRangeException()
+                    };
+                    b.Append(opChar).Append(' ').Append(patchDiff.FormattedText).Append('\n');
+                }
+            }
+            Console.WriteLine(b.ToString());
+            return;
+        }
+
         foreach (var d in diff)
         {
             bool whitespaceOnly = d.WhitespaceOnlyDiff;

diff-text/diff-text.csproj

@@ -15,6 +15,6 @@
         <ProjectReference Include="..\..\DTLib\DTLib\DTLib.csproj" />
     </ItemGroup>
     <ItemGroup Condition=" '$(Configuration)' != 'Debug' ">
-        <PackageReference Include="DTLib" Version="1.1.7" />
+        <PackageReference Include="DTLib" Version="1.1.8" />
     </ItemGroup>
 </Project>

paradox-mod-merger/paradox-mod-merger.csproj

@@ -19,7 +19,7 @@
     <ProjectReference Include="..\..\DTLib\DTLib\DTLib.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(Configuration)' != 'Debug' ">
-    <PackageReference Include="DTLib" Version="1.1.7" />
+    <PackageReference Include="DTLib" Version="1.1.8" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\diff-text\diff-text.csproj" />