Normalize CRLF to LF in text files for cross-platform determinism

Strip \r\n → \n for non-binary files (skip .png and .usm) so that
archives are byte-identical regardless of git line ending settings
on the build machine.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: AngeloTadeucci

.github/workflows/determinism.yml

@@ -26,7 +26,7 @@ jobs:
         run: dotnet --info
 
       - name: Clone test data
-        run: git clone --depth 1 -c core.autocrlf=false -c core.eol=lf https://github.com/MS2Community/MapleStory2-XML.git test-data
+        run: git clone --depth 1 https://github.com/MS2Community/MapleStory2-XML.git test-data
 
       - name: Build
         run: dotnet build MS2Tools.sln -c Release

MS2Create/Program.cs

@@ -91,14 +91,32 @@ private static void AddAndCreateFileToArchive(IMS2Archive archive, (string fullP
         (string filePath, string relativePath) = filePaths[index];
 
         uint id = index + 1;
-        FileStream fsFile = File.OpenRead(filePath);
+        Stream dataStream = OpenNormalized(filePath);
         IMS2FileInfo info = new MS2FileInfo(id.ToString(), relativePath);
-        IMS2FileHeader header = new MS2FileHeader(fsFile.Length, id, 0, GetCompressionTypeFromFileExtension(filePath));
-        IMS2File file = new MS2File(archive, fsFile, info, header, false);
+        IMS2FileHeader header = new MS2FileHeader(dataStream.Length, id, 0, GetCompressionTypeFromFileExtension(filePath));
+        IMS2File file = new MS2File(archive, dataStream, info, header, false);
 
         archive.Add(file);
     }
 
+    private static Stream OpenNormalized(string filePath) {
+        CompressionType ct = GetCompressionTypeFromFileExtension(filePath);
+        if (ct == CompressionType.Png || ct == CompressionType.Usm) {
+            return File.OpenRead(filePath);
+        }
+
+        byte[] raw = File.ReadAllBytes(filePath);
+        int dst = 0;
+        for (int src = 0; src < raw.Length; src++) {
+            if (raw[src] == (byte)'\r' && src + 1 < raw.Length && raw[src + 1] == (byte)'\n') {
+                continue;
+            }
+            raw[dst++] = raw[src];
+        }
+
+        return new MemoryStream(raw, 0, dst, writable: false);
+    }
+
     private static (string FullPath, string RelativePath)[] GetFilesRelative(string path) {
         if (!path.EndsWith(Path.DirectorySeparatorChar)) {
             path += Path.DirectorySeparatorChar;