Enhance shebang handling in REPL and source code execution to preserve line numbers

luash

@@ -133,7 +133,12 @@ function start_repl()
 
   -- Luash preprocessing function for REPL
   local function preprocess_luash_repl(code)
-      code = code:gsub("^#![^\r\n]*[\r\n]?", "") -- Remove shebang
+      -- Remove shebang line if present and preserve line numbers
+      local has_shebang = code:match("^#!")
+      code = code:gsub("^#![^\r\n]*[\r\n]?", "")
+      if has_shebang then
+        code = "\n" .. code
+      end
       code = process_env_vars_repl(code)
       code = process_interactive_commands_repl(code)
       code = process_shell_commands_repl(code)
@@ -320,9 +325,15 @@ end
 local source_code = file:read("*a")
 file:close()
 
--- Remove shebang line if present
+-- Remove shebang line if present and preserve line numbers
+local has_shebang = source_code:match("^#!")
 source_code = source_code:gsub("^#![^\r\n]*[\r\n]?", "")
 
+-- If we removed a shebang, add an empty line to preserve line numbers
+if has_shebang then
+  source_code = "\n" .. source_code
+end
+
 
 
 -- Preprocessing functions
@@ -466,18 +477,32 @@ source_code = process_env_vars(source_code)
 source_code = process_interactive_commands(source_code)
 source_code = process_shell_commands(source_code)
 
--- Combine and execute
-local final_code = injected_lib .. "\n" .. source_code
-
 -- Debug output
 if os.getenv("LUASH_DEBUG") then
   print("-- Generated Lua code:")
-  print(final_code)
+  print(source_code)
   print("-- End generated code")
 end
 
--- Execute
-local func, err = load(final_code, "@" .. filename)
+-- Pre-load injected library into global environment
+if injected_lib ~= "" then
+  local lib_func, lib_err = load(injected_lib, "@__injected_lib.lua")
+  if lib_func then
+    local success, result = pcall(lib_func)
+    if not success then
+      print("--- ERROR loading injected library ---")
+      print(result)
+      return
+    end
+  else
+    print("--- SYNTAX ERROR in __injected_lib.lua ---")
+    print(lib_err)
+    return
+  end
+end
+
+-- Execute the user's source code (with correct line numbers)
+local func, err = load(source_code, "@" .. filename)
 if not func then
   print("--- SYNTAX ERROR in " .. filename .. " ---")
   print(err)

new_proj.luash

@@ -0,0 +1,21 @@
+#!/usr/bin/env luash
+
+-- Environment variables (clean syntax)
+print("Hello " .. $USER .. "!")
+
+-- Variable assignment  
+$MY_VAR = "some value"
+
+--  Shell commands with backticks
+files = `ls -la`
+current_dir = `pwd`
+
+-- Interactive commands
+!ls
+
+-- The power of Lua + shell
+if `test -f README.md` ~= "" then
+    lines = `wc -l < README.md`
+    print("README has " .. lines .. " lines")
+end
+