Reload script on selection

Fixes #5

README.md

@@ -131,10 +131,7 @@ For controls like instrument brightness knobs which take a number between
 point number. DCSZap converts these into into integers - `0.0` to `0`, `1.0`
 to `65535`.
 
-Presently the scripts are loaded into memory at the time they are displayed
-for selection, so if you've edited a script with DCSZap waiting for a selection
-and then you run it, you'll run the old version. To reload the list, enter a
-number that doesn't correspond to any script e.g. 0.
+To reload the list, enter a number that doesn't correspond to any script e.g. 0.
 
 For more guidance on DCS-BIOS commands, please see:
 - [the DCS-BIOS documentation](https://github.com/DCS-Skunkworks/dcs-bios/blob/master/Scripts/DCS-BIOS/doc/developerguide.adoc#the-dcs-bios-import-protocol)
@@ -156,7 +153,6 @@ scripts in human language e.g. `Landing lights: Extend` rather than
 labelled to the virtual pilot and the identifiers and values used in DCS-BIOS.
 
 - command line option to specify a specific script rather than select from directory, allowing the script to run completely silent
-- load scripts on selection, not when the selection list is displayed
 - more obvious selection list reload action
 - Make the tests better, largely for the sake of better tests
 - 2-way comms with DCS-BIOS to, e.g., select a script automatically on loading

dcszap.py

@@ -109,20 +109,21 @@ def run(self):
         """Repeatedly prompt to select and run a script"""
         while True:
             print(f"Scripts located in {self._script_dir}:")
-            scripts = []
+            filenames = []
             for filename in os.listdir(self._script_dir):
                 full_filename = os.path.join(self._script_dir, filename)
                 if os.path.isfile(full_filename) and filename.endswith(".txt"):
-                    scripts.append(Script.load(full_filename))
-            for i, script in enumerate(scripts, start=1):
+                    filenames.append(full_filename)
+            for i, filename in enumerate(filenames, start=1):
+                script = Script.load(filename)
                 print(f"{i:2} {script.name:32}{script.description}")
             try:
                 selection = int(input("> ")) - 1
             except (KeyboardInterrupt, ValueError):
                 sys.exit()
-            if selection not in range(0, len(scripts)):
+            if selection not in range(0, len(filenames)):
                 continue
-            scripts[selection].run(self, self._quiet)
+            Script.load(filenames[selection]).run(self, self._quiet)
             if not self._quiet:
                 print("Script complete!\n")