Add simplified support for debug.getinfo() (#524)

Adds a simplified debug.getinfo() function to yafc-ce lua. It only
returns "short_src", the part used by mods that needs this function.

Tested with mod from #455, and whole py suite.

Author: shpaass

Yafc.Parser/LuaContext.cs

@@ -141,13 +141,15 @@ private enum Type {
     private readonly Dictionary<(string mod, string name), byte[]> modFixes = [];
 
     private static readonly ILogger logger = Logging.GetLogger<LuaContext>();
-
+    private string currentfile;
     public LuaContext() {
         L = luaL_newstate();
         _ = luaL_openlibs(L);
         RegisterApi(Log, "raw_log");
         RegisterApi(Require, "require");
         RegisterApi(DebugTraceback, "debug", "traceback");
+        RegisterApi(DebugGetinfo, "debug", "getinfo");
+        currentfile = "__no__/file";
         _ = lua_pushstring(L, Project.currentYafcVersion.ToString());
         lua_setglobal(L, "yafc_version");
         var mods = NewTable();
@@ -232,6 +234,13 @@ private int DebugTraceback(IntPtr lua) {
         return 1;
     }
 
+    private int DebugGetinfo(IntPtr lua) {
+        LuaTable outdata = NewTable();
+        outdata["short_src"] = currentfile;
+        PushManagedObject(outdata);
+        return 1;
+    }
+
     private int Log(IntPtr lua) {
         logger.Information(GetString(1));
         return 0;
@@ -463,6 +472,7 @@ private int Require(IntPtr lua) {
         }
 
         logger.Information("Require {RequiredFile}", requiredFile.mod + "/" + requiredFile.path);
+        currentfile = "__" + requiredFile.mod + "__/" + requiredFile.path;
         byte[] bytes = FactorioDataSource.ReadModFile(requiredFile.mod, requiredFile.path);
 
         if (bytes != null) {
@@ -569,6 +579,7 @@ public void DoModFiles(string[] modorder, string fileName, IProgress<(string, st
             }
 
             logger.Information("Executing file {Filename}", mod + "/" + fileName);
+            currentfile = "__" + mod + "__/" + fileName;
             _ = Exec(bytes, mod, fileName);
             RunModFix(mod, fileName);
         }

changelog.txt

@@ -18,6 +18,11 @@
 //     Internal changes:
 //         Changes to the code that do not affect the behavior of the program.
 
+----------------------------------------------------------------------------------------------------------------------
+Version:
+Date:
+    Fixes:
+        - Add simplified support for debug.getinfo(), only returns short_src. Fixes #455, #504.
 ----------------------------------------------------------------------------------------------------------------------
 Version: 2.15.0
 Date: September 1st 2025