linux-kernel - Re: [PATCH v2] lib/build_OID_registry: Don't mention the full path of the script in output

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Date: Fri, 15 Mar 2024 08:16:21 +0100
From: Nicolas Schier <nicolas@...sle.eu>
To: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Masahiro Yamada <masahiroy@...nel.org>, kernel@...gutronix.de,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] lib/build_OID_registry: Don't mention the full path
 of the script in output

On Wed 13 Mar 2024 22:19:56 GMT, Uwe Kleine-König wrote:
> Date: Wed, 13 Mar 2024 22:19:56 +0100
> From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> To: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Masahiro Yamada <masahiroy@...nel.org>, kernel@...gutronix.de,
>  linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
> Subject: [PATCH v2] lib/build_OID_registry: Don't mention the full path of
>  the script in output
> Message-ID: <20240313211957.884561-2-u.kleine-koenig@...gutronix.de>
> X-Mailer: git-send-email 2.43.0
> X-Mailing-List: linux-kbuild@...r.kernel.org
> 
> This change strips the full path of the script generating
> lib/oid_registry_data.c to just lib/build_OID_registry. The motivation
> for this change is Yocto emitting a build warning
> 
> 	File /usr/src/debug/linux-lxatac/6.7-r0/lib/oid_registry_data.c in package linux-lxatac-src contains reference to TMPDIR [buildpaths]
> 
> So this change brings us one step closer to make the build result
> reproducible independent of the build path.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
> Changes since (implicit) v1, archived at
> https://lore.kernel.org/lkml/20240311110121.459581-2-u.kleine-koenig@pengutronix.de:
> 
>  - Handle abs_srctree not being exported any more
> 
> The v1 patch made it into next but im combination with commit e2bad142bb3d
> ("kbuild: unexport abs_srctree and abs_objtree") resulted in a build warning
> about $ENV{"abs_srctree"} being uninitialized which required this respin.
> 
> Best regards
> Uwe
> 
>  lib/build_OID_registry | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/build_OID_registry b/lib/build_OID_registry
> index d7fc32ea8ac2..56d8bafeb848 100755
> --- a/lib/build_OID_registry
> +++ b/lib/build_OID_registry
> @@ -8,6 +8,7 @@
>  #
>  
>  use strict;
> +use Cwd qw(abs_path);
>  
>  my @names = ();
>  my @oids = ();
> @@ -17,6 +18,8 @@ if ($#ARGV != 1) {
>      exit(2);
>  }
>  
> +my $abs_srctree = abs_path($ENV{'srctree'});
> +
>  #
>  # Open the file to read from
>  #
> @@ -35,7 +38,7 @@ close IN_FILE || die;
>  #
>  open C_FILE, ">$ARGV[1]" or die;
>  print C_FILE "/*\n";
> -print C_FILE " * Automatically generated by ", $0, ".  Do not edit\n";
> +print C_FILE " * Automatically generated by ", $0 =~ s#^\Q$abs_srctree/\E##r, ".  Do not edit\n";

I'd rather remove the script name from the comment or hard-code the 
file name, but this is correct as it is.

Reviewed-by: Nicolas Schier <nicolas@...sle.eu>

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