linux-kernel - Re: [PATCH] coccicheck: improve pattern for getting relative path

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Date:   Thu, 10 Aug 2017 21:08:31 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Cihangir Akturk <cakturk@...il.com>
cc:     Julia.Lawall@...6.fr, Gilles.Muller@...6.fr, nicolas.palix@...g.fr,
        mmarek@...e.com, cocci@...teme.lip6.fr,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coccicheck: improve pattern for getting relative path



On Thu, 10 Aug 2017, Cihangir Akturk wrote:

> When invoked with V=1, coccicheck script prints the information about
> which semantic patch (*.cocci file) used for this operation.  Actually,
> it prints out the relative path of the related semantic patch. The
> script uses sed to remove the source tree part from cocci file path like
> so:
>
> FILE=`echo $COCCI | sed "s|$srctree/||"`
>
> This pattern works well most of the time. But in cases where $COCCI
> doesn't start with "./" characters, it doesn't remove the right part.
>
> Consider the following scenario:
>
> $ make coccicheck COCCI=scripts/coccinelle/api/drm-get-put.cocci \
>                         MODE=patch M=drivers/staging V=1
>
> where
>
> COCCI=scripts/coccinelle/api/drm-get-put.cocci and srctree=.
>
> In this case, out pattern matches the first "s/", and we end up
> assigning "scriptcoccinelle/api/drm-get-put.cocci" to $FILE.
>
> Fix this by adding a caret ^ at the beginning of regex pattern, so that
> it matches only start of the path.

Nicolas, is this ok?

julia

>
> Signed-off-by: Cihangir Akturk <cakturk@...il.com>
> ---
>  scripts/coccicheck | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/coccicheck b/scripts/coccicheck
> index ec487b8..8de4245 100755
> --- a/scripts/coccicheck
> +++ b/scripts/coccicheck
> @@ -193,7 +193,7 @@ coccinelle () {
>
>      if [ $VERBOSE -ne 0 -a $ONLINE -eq 0 ] ; then
>
> -	FILE=`echo $COCCI | sed "s|$srctree/||"`
> +	FILE=`echo $COCCI | sed "s|^$srctree/||"`
>
>  	echo "Processing `basename $COCCI`"
>  	echo "with option(s) \"$OPT\""
> --
> 2.7.4
>
>