linux-kernel - Re: [PATCH] gen_compile_commands: fix invalid escape sequence

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Date: Tue, 13 Feb 2024 10:48:38 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Andrew Ballance <andrewjballance@...il.com>
Cc: linux-kernel@...r.kernel.org, nathan@...nel.org, nicolas@...sle.eu, 
	ndesaulniers@...gle.com, morbo@...gle.com, justinstitt@...gle.com, 
	linux-kbuild@...r.kernel.org, llvm@...ts.linux.dev, skhan@...uxfoundation.org, 
	linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] gen_compile_commands: fix invalid escape sequence

On Tue, Feb 13, 2024 at 10:21 AM Andrew Ballance
<andrewjballance@...il.com> wrote:
>
> this fixes the error, "SyntaxWarning: invalid escape sequence '\#'"
>
> the error can be recreated by running


Not an error.
It is a warning.


>     make CC=clang compile_commands.json



What is more important is to mention the Python version
in the commit description.

Example:

---------------->8----------------
With Python 3.12, '\#' results in this warning:

  SyntaxWarning: invalid escape sequence '\#'
---------------->8----------------



Please update the commit message.




The make command is not so important.

I quickly confirm it in the interactive mode
instead of running the build command.



$ python3.12
Python 3.12.0 (main, Oct  4 2023, 06:27:34) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> '\#'
<stdin>:1: SyntaxWarning: invalid escape sequence '\#'
'\\#'
>>> '\\#'
'\\#'





>
> Signed-off-by: Andrew Ballance <andrewjballance@...il.com>
> ---
>  scripts/clang-tools/gen_compile_commands.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py
> index 5dea4479240b..93f64095fda9 100755
> --- a/scripts/clang-tools/gen_compile_commands.py
> +++ b/scripts/clang-tools/gen_compile_commands.py
> @@ -170,7 +170,7 @@ def process_line(root_directory, command_prefix, file_path):
>      # escape the pound sign '#', either as '\#' or '$(pound)' (depending on the
>      # kernel version). The compile_commands.json file is not interepreted
>      # by Make, so this code replaces the escaped version with '#'.
> -    prefix = command_prefix.replace('\#', '#').replace('$(pound)', '#')
> +    prefix = command_prefix.replace('\\#', '#').replace('$(pound)', '#')
>
>      # Return the canonical path, eliminating any symbolic links encountered in the path.
>      abs_path = os.path.realpath(os.path.join(root_directory, file_path))
> --
> 2.43.0
>


-- 
Best Regards
Masahiro Yamada