Re: [PATCH v3 13/17] verification/rvgen: Add the rvgen kunit subcommand

[Nam Cao <namcao@linutronix.de>]

Gabriele Monaco <gmonaco@redhat.com> writes:
> +    def print_files(self):
> +
> +        handlers = self.__parse_attach_handlers()
> +
> +        if not handlers:
> +            print(f"No handlers found registered with rv_attach_trace_probe in {self.monitor_path}")
> +            return

There is no valid monitor without any handler, right? If so, should we
throw an exception here?

> +
> +        print("Found tracepoint handler(s):")
> +        for handler in handlers:
> +            print(f"  - {handler}")
> +
> +        prototypes = []
> +        assignments = []
> +        for handler in handlers:
> +            arguments = self.__extract_function_args(handler)
> +
> +            prototypes.append(f"void (*{handler})({arguments});")
> +            assignments.append(f".{handler} = {handler},")
> +
> +        struct_name = f"rv_{self.name}_ops"
> +
> +        self.__fill_monitor_handlers(struct_name, assignments)
> +
> +        dir_path = os.path.dirname(self.monitor_path)
> +
> +        header_file_path = os.path.join(dir_path, f"{self.name}_kunit.h")
> +        kunit_c_file_path = os.path.join(dir_path, f"{self.name}_kunit.c")
> +
> +        use_backup = True
> +        if os.path.exists(header_file_path) or os.path.exists(kunit_c_file_path):
> +            try:
> +                response = input("KUnit file(s) already exist. Overwrite? [y/N]  (N for backup): ")
> +                if response.strip().lower() in ("y", "yes"):
> +                    use_backup = False
> +            except EOFError:
> +                print("Non-interactive session detected, not overwriting existing files.")
> +        else:
> +            use_backup = False
> +
> +        if use_backup:
> +            header_file_path += ".bak"
> +            kunit_c_file_path += ".bak"

This is the opposite of what other software do. Usually they copy the
original file to a different name (with a prefix or a suffix), and
overwrite the original file.

I think it's best to follow the usual practice to avoid confusion, maybe
something like this:

if os.path.exists(header_file_path) or os.path.exists(kunit_c_file_path):
    try:
        response = input("KUnit file(s) already exist. Backup? [Y/n]")
        if not response.strip().lower() in ("n", "no"):
            ...rename the file...
    except EOFError:
        print("Non-interactive session detected, not overwriting existing files.")

Nam