Add comments.

src/qutescript/decorator.py

@@ -12,25 +12,38 @@ from .request import build_request
 
 def userscript(func):
     def wrapper():
-        userscript_name = os.path.basename(sys.argv[0])
+        """
+        Wraps a qutebrowser-userscript in a warm blanket
+        of easy to access parameters and a sprinkling
+        of debugging goodness.
+        """
+        userscript_name = os.path.basename(sys.argv[0])  # example: my_script.py
         try:
+            # Check if "--install" was passed, and handle it.
             main_cli()
         except Exception as e:
             log_to_browser(traceback.format_exc(), 'Cannot execute cli handler', prefix=userscript_name)
             sys.exit(1)
+        # main_cli() may call sys.exit() if --install was passed at command line.
+        # If sys.exit() was called by main_cli(), we would never reach here.
+        # Since ^that^ did not happen...
         try:
             request = build_request()
         except Exception as e:
             log_to_browser(traceback.format_exc(), 'Cannot build request.', prefix=userscript_name)
             sys.exit(5)
+        # We now have a request to handle.
         try:
-            func_ = userscript_cli(func)
-            command = func_(request)
+            # Wrapper for future use; disabled for now.
+            # func = userscript_cli(func)
+            command = func(request)
             if not command:
+                # No command to execute, our work is done.
                 return
         except Exception as e:
             log_to_browser(traceback.format_exc(), 'Userscript error.', prefix=userscript_name)
             sys.exit(10)
+        # We also have a command to execute.
         if not request.fifo:
             message = ('ERROR: userscript returned command: {}, '
                        'but QUTE_FIFO was not found in passed environment.\n'
@@ -38,6 +51,7 @@ def userscript(func):
             log_to_browser(traceback.format_exc(), message, prefix=userscript_name)
             sys.exit(20)
         try:
+            # Send the returned command to qutebrowser.
             with open(request.fifo, 'w') as fifo:
                 fifo.write('{}\n'.format(command))
         except Exception as e: