Re: [dpdk-stable] [PATCH] devtools: fix check symbol change script

[David Marchand <david.marchand@redhat.com>]

On Thu, Mar 19, 2020 at 3:44 PM Nithin Dabilpuram
<ndabilpuram@marvell.com> wrote:
>
> Fix check symbol change script to detect new diff file when
> it is in between  "--- /dev/null" to "b/lib/...".
> Current awk line expects line to start with "a/..."
> which is not always true for all diffs.
> As a result if in_map was '1' earlier, it will not be changed
> to '0' and we get check patch errors which are not true as the non
> version.map files get interpreted as version map file.
>
> Fixes: 4bec48184e33 ("devtools: add checks for ABI symbol addition")
> Cc: nhorman@tuxdriver.com
> Cc: stable@dpdk.org

There was a previous attempt at fixing this that did not get a review.
http://patchwork.dpdk.org/patch/56303/

I prefer the last submitted patch as it is simpler, but maybe I missed
something in Bing patch.

Neil, wdyt?


-- 
David Marchand


>
> Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
> ---
> Note: We have two examples where checkpatch errors are because of this
> because the version.map file change comes earlier in the diff. Because of
> this bug, any new file change that comes after version.map file diff
> as "/dev/null" to "b/.." gets misdetected as version.map file.
> * http://patches.dpdk.org/patch/66878/
> * https://patchwork.dpdk.org/patch/66900/
>  devtools/check-symbol-change.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
> index c5434f3..19ce82f 100755
> --- a/devtools/check-symbol-change.sh
> +++ b/devtools/check-symbol-change.sh
> @@ -17,13 +17,13 @@ build_map_changes()
>                 # map files are altered, and all section/symbol names
>                 # appearing between a triggering of this rule and the
>                 # next trigger of this rule are associated with this file
> -               /[-+] a\/.*\.map/ {map=$2; in_map=1}
> +               /[-+] [ab]\/.*\.map/ {map=$2; in_map=1}
>
>                 # Same pattern as above, only it matches on anything that
>                 # does not end in 'map', indicating we have left the map chunk.
>                 # When we hit this, turn off the in_map variable, which
>                 # supresses the subordonate rules below
> -               /[-+] a\/.*\.[^map]/ {in_map=0}
> +               /[-+] [ab]\/.*\.[^map]/ {in_map=0}
>
>                 # Triggering this rule, which starts a line and ends it
>                 # with a { identifies a versioned section.  The section name is
> --
> 2.8.4
>