Fix psm append not working

src/psm_parser.py

@@ -1,3 +1,4 @@
+import shutil
 from pathlib import Path
 from datetime import datetime
 
@@ -163,16 +164,16 @@ def define_variables(items: list[str]) -> str:
 def define_strings(items: list[str]) -> str:
     return "\n".join(["\t" + "[string]$" + "{" + sanitize_name(item) + "}" for item in items])
 
-def write_psm(name, items: list[str], filename: Path = Path("Connector.psm1")) -> str:
-    from rich import print
 
+def write_psm(name, items: list[str], filename: Path = Path("Connector.psm1")) -> str:
     if filename.exists():
-        filename.rename(str(filename) + f".{datetime.now().strftime('%Y-%m-%d.%H%M%S')}.bak")
+        backup_filename = str(filename) + f".{datetime.now().strftime('%Y-%m-%d.%H%M%S')}.bak"
+        shutil.copy2(filename, backup_filename)
+
     output = get_all_code.replace("!NAME!", name)
     output += get_code.replace("!NAME!", name)
     output += convert_from.replace("!NAME!", name).replace("!MAPS!", define_maps(items))
     output += class_definition.replace("!NAME!", name).replace("!VARIABLES!", define_variables(items)).replace("!STRINGS!", define_strings(items))
     with open(filename, "a") as f:
         f.write(output)
-    print(output)
     pass