Add 'history_includes_scripts' settable

At least in most of my use cases, the individual commands of a script
executed by the command line should not end up in the history.  If I go
back in history, I want to find the commands I typed (like the
run_script), and not the commands contained in the script I executed,
or even the scripts that this script might execute itself.

This patch introduces a new settable 'history_includes_scripts'.  It is
kept as 'true' by default to preserve the legacy behavior of existing
cmd2 versions.  However, it can be set to 'false' to make run_script
not add to the history by default.  Individual run_script executions
can still use the --history option to make them override the default
and add to the history.

Signed-off-by: Harald Welte <[email protected]>

cmd2/cmd2.py

@@ -323,6 +323,7 @@ def __init__(
         self.feedback_to_output = False  # Do not include nonessentials in >, | output by default (things like timing)
         self.quiet = False  # Do not suppress nonessential output
         self.timing = False  # Prints elapsed time for each command
+        self.history_includes_scripts = True # Should the history contain commands issued by scripts?
 
         # The maximum number of CompletionItems to display during tab completion. If the number of completion
         # suggestions exceeds this number, they will be displayed in the typical columnized format and will
@@ -1103,6 +1104,7 @@ def allow_style_type(value: str) -> ansi.AllowStyle:
         )
         self.add_settable(Settable('quiet', bool, "Don't print nonessential feedback", self))
         self.add_settable(Settable('timing', bool, "Report execution times", self))
+        self.add_settable(Settable('history_includes_scripts', bool, "History should contain commands issued by scripts", self))
 
     # -----  Methods related to presenting output to the user -----
 
@@ -5048,8 +5050,8 @@ def _current_script_dir(self) -> Optional[str]:
         completer=path_complete,
     )
     run_script_parser.add_argument(
-        '--no-history',
-        action='store_true',
+        '--history',
+        action=argparse.BooleanOptionalAction,
         help="Don't add commands issued by script to the history",
     )
     run_script_parser.add_argument('script_path', help="path to the script file", completer=path_complete)
@@ -5090,7 +5092,10 @@ def do_run_script(self, args: argparse.Namespace) -> Optional[bool]:
             return None
 
         orig_script_dir_count = len(self._script_dir)
-        add_to_history = not args.no_history
+        if args.history == None:
+            add_to_history = self.history_includes_scripts
+        else:
+            add_to_history = args.history
 
         try:
             self._script_dir.append(os.path.dirname(expanded_path))