linux-kernel - Re: [PATCH v2] scripts/config: allow "O=config-dir" option

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Date:   Fri, 5 Nov 2021 00:41:59 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Nicolas Schier <nicolas@...sle.eu>
Subject: Re: [PATCH v2] scripts/config: allow "O=config-dir" option

On Wed, Nov 3, 2021 at 7:40 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>
> Support "O=config-dir" as the location of the .config file
> like (some) other kernel build (make) tools do.
>
> Also check for the existence of the config-dir/config-file
> and report if there is no such file instead of letting grep
> report that there is no such file.
>
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Masahiro Yamada <masahiroy@...nel.org>
> Cc: Nick Desaulniers <ndesaulniers@...gle.com>
> Cc: linux-kbuild@...r.kernel.org
> Cc: Andi Kleen <ak@...ux.intel.com>
> Reviewed-by: Nicolas Schier <nicolas@...sle.eu>
> ---

Why don't you use  --file path/to/output/dir/.config ?







> v2:
> - use 'shellcheck' and other recommendations from Nicolas
> - move one comment from the commit description to under the "---" line
>
> Someone asked for this "feature" a few months ago but I don't
> recall who it was.
>
>  scripts/config |   44 +++++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 39 insertions(+), 5 deletions(-)
>
> --- linux-next-20211102.orig/scripts/config
> +++ linux-next-20211102/scripts/config
> @@ -37,6 +37,7 @@ commands:
>
>  options:
>         --file config-file   .config file to change (default .config)
> +       O=config-dir         Specify the directory location of the config-file
>         --keep-case|-k       Keep next symbols' case (dont' upper-case it)
>
>  $myname doesn't check the validity of the .config file. This is done at next
> @@ -124,15 +125,48 @@ undef_var() {
>         txt_delete "^# $name is not set" "$FN"
>  }
>
> -if [ "$1" = "--file" ]; then
> -       FN="$2"
> -       if [ "$FN" = "" ] ; then
> +DIR=
> +FN=
> +
> +while [ "$DIR" = "" ] || [ "$FN" = "" ]; do
> +
> +       if [ "$1" = "" ] ; then
>                 usage
>         fi
> -       shift 2
> -else
> +       if [ "$1" = "--file" ]; then
> +               FN="$2"
> +               if [ "$FN" = "" ] ; then
> +                       usage
> +               fi
> +               shift 2
> +               continue
> +       fi
> +
> +       optn=$1
> +       optnlen=${#optn}
> +       if [ "$optnlen" -gt 1 ] && [ "${optn:0:2}" = "O=" ]; then
> +               DIR=${optn:2}
> +               shift
> +               if [ "$DIR" = "" ]; then
> +                       usage
> +               fi
> +               continue
> +       fi
> +       break   # something other than --file or O=dir
> +done
> +
> +if [ "$FN" = "" ]; then
>         FN=.config
>  fi
> +if [ "$DIR" != "" ]; then
> +       DIR=$DIR"/"
> +fi
> +FN="${DIR}${FN}"
> +
> +if [ ! -r "$FN" ]; then
> +       echo "No such config file: $FN"
> +       exit
> +fi
>
>  if [ "$1" = "" ] ; then
>         usage



-- 
Best Regards
Masahiro Yamada