typos, standardization, and file association for project extensions

startup_args.py

@@ -0,0 +1,41 @@
+"""
+Filename: startup_args.py
+Description: Parses the startup arguments for the application
+Note: Compliant with pylance strict type checking
+
+Author: Tyler de Zeeuw
+License: GPL-3.0
+"""
+
+import os
+from dataclasses import dataclass
+
+
+@dataclass
+class StartupArgs:
+    finish_update: bool
+    initial_file: str | None
+
+
+def parse_startup_args(argv: list[str]) -> StartupArgs:
+    """
+    Parses the command-line flags.
+
+    Recognizes:
+      --finish-update   set by the updater when relaunching post-update
+      <path>            a project file to open on startup — the first
+                         argument that doesn't start with '-', found
+                         anywhere in argv rather than assumed to be at
+                         a fixed position, so it survives regardless of
+                         whether --finish-update precedes it.
+    """
+    
+    finish_update = "--finish-update" in argv[1:]
+
+    initial_file = None
+    for arg in argv[1:]:
+        if not arg.startswith("-"):
+            initial_file = os.path.abspath(arg)
+            break
+
+    return StartupArgs(finish_update=finish_update, initial_file=initial_file)