add custom exception and barebones error handling to launcher detection

installer.py

@@ -29,6 +29,11 @@ from pathlib import Path
 # as far as i can tell, i wanted to add an "option" to the function that toggled the warning m-
 # -essage, so i dont have to use all this space here defining functions i dont really need.
 
+class customerror(Exception):
+    def __init__(self, message):
+        self.message = message
+        super().__init__(self.message)
+
 def delete_directory_warn(directory_to_delete, warn=False):
     #this defines a function to delete a directory (no shit)
     try:
@@ -115,13 +120,16 @@ def check_if_exists_and_delete_file(filepath):
     else:
         pass
 
+global detectedlauncher
+detectedlauncher = "null"
+
 def check_for_launcher_files(filepath, launchername):
     #checks for evidence of 3rd party launchers and sets a variable flag if a launcher is installed
     if os.path.exists(filepath):
-        print("Alternative Minecraft launcher detected: " + str(launchername))
+        print("[INFO]: Detected Minecraft launcher: " + str(launchername))
         detectedlauncher = str(launchername)
     else:
-        pass
+        raise customerror("[ERR!]: File not detected.")
 
 
 # --------------------the real shit!------------------------
@@ -138,8 +146,11 @@ global modfolder
 if platform.system() == "Linux":
     print("Operating system detected: Linux")
 
+    try:
+        check_for_launcher_files(str(Path.cwd()) + "/.local/share/PrismLauncher", "PrismLauncherPackage")
         check_for_launcher_files(str(Path.cwd()) + "/.var/app/org.prismlauncher.Prism.Launcher", "PrismLauncherFlatpak")
-    check_for_launcher_files(str(Path.cwd()) + "/.local/share/PrismLauncher/prismlauncher.cfg", "PrismLauncherPackage")
+    except customerror as e:
+        pass
 
     os.chdir(".minecraft")
     mcfolder = str(Path.cwd())