Lua tweaks: a couple of functions, dfusion tweak, backtrace metadata.

library/LuaTools.cpp

@@ -189,7 +189,7 @@ bool DFHack::Lua::Require(color_ostream &out, lua_State *state,
 
 static bool load_with_env(color_ostream &out, lua_State *state, const std::string &code, int eidx)
 {
-    if (luaL_loadstring(state, code.c_str()) != LUA_OK)
+    if (luaL_loadbuffer(state, code.data(), code.size(), "=(interactive)") != LUA_OK)
     {
         report_error(out, state);
         return false;

library/lua/dfhack.lua

@@ -1,5 +1,29 @@
 -- Common startup file for all dfhack plugins with lua support
+-- The global dfhack table is already created by C++ init code.
 
--- The global dfhack table is already created by C++ init
+function mkmodule(module,env)
--- code. Feed it back to the require() mechanism.
+    local pkg = package.loaded[module]
+    if pkg == nil then
+        pkg = {}
+    else
+        if type(pkg) ~= 'table' then
+            error("Not a table in package.loaded["..module.."]")
+        end
+    end
+    setmetatable(pkg, { __index = (env or _G) })
+    return pkg
+end
+
+function reload(module)
+    if type(package.loaded[module]) ~= 'table' then
+        error("Module not loaded: "..module)
+    end
+    local path,err = package.searchpath(module,package.path)
+    if not path then
+        error(err)
+    end
+    dofile(path)
+end
+
+-- Feed the table back to the require() mechanism.
 return dfhack

plugins/Dfusion/luafiles/init.lua

@@ -1,3 +1,7 @@
+Console.print = dfhack.print
+Console.println = dfhack.println
+Console.printerr = dfhack.printerr
+
 function err(msg) --make local maybe...
 	print(msg)
 	print(debug.traceback())