[v13,4/6] devtools: fix the missing ninja command error

  On some linux distributions, eg: CentOS, the ninja executable has a
different name: ninja-build, this patch is to check and adapt to it
accordingly.

./devtools/test-meson-builds.sh: line 24: ninja: command not found

Fixes: a55277a788 ("devtools: add test script for meson builds")
Cc: stable@dpdk.org

Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Phil Yang <phil.yang@arm.com>
Reviewed-by: Song Zhu <song.zhu@arm.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
 devtools/test-meson-builds.sh | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
  

25/06/2018 04:49, Gavin Hu:
> On some linux distributions, eg: CentOS, the ninja executable has a
> different name: ninja-build, this patch is to check and adapt to it
> accordingly.
> 
> ./devtools/test-meson-builds.sh: line 24: ninja: command not found
> 
> Fixes: a55277a788 ("devtools: add test script for meson builds")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Phil Yang <phil.yang@arm.com>
> Reviewed-by: Song Zhu <song.zhu@arm.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
> --- a/devtools/test-meson-builds.sh
> +++ b/devtools/test-meson-builds.sh
> +if command -v ninja >/dev/null 2>&1 ; then
> +    ninja_cmd=ninja
> +elif command -v ninja-build >/dev/null 2>&1 ; then
> +    ninja_cmd=ninja-build
> +else
> +    echo "## ERROR: ninja is missing, please install..."

No need of double hash to get attention as it is the last printed line.
Matter of taste, but I prefer more simple (not interpreted) message like:
	"ERROR: ninja is not found"

Or even simpler, no message at all and try with ninja_cmd=ninja as default:

if command -v ninja-build >/dev/null 2>&1 ; then
	ninja_cmd=ninja-build
else
	ninja_cmd=ninja
fi

Will still have the shell message in case of ninja not installed:
	ninja: command not found