[yocto] [meta-selinux][PATCH] conf/layer.conf: set BBFILES to known layers

[Robert Yang]

I found that bitbake has BBFILES_DYNAMIC for such dynamic-layers,
I will send a V2.

// Robert

On 01/16/2018 04:54 PM, Robert Yang wrote:
> The previous code add all BBFILE_COLLECTIONS/recipes*/*/*.bbappend to BBFILES,
> which causes the parsing very slow when there are many layers, e.g., I have 87
> layers:
> 
> * Before:
> $ rm -fr tmp-glibc/ cache; time bitbake -p
> real    0m45.173s
> user    0m0.560s
> sys     0m0.060s
> 
> * After:
> $ rm -fr tmp-glibc/ cache; time bitbake -p
> real    0m25.542s
> user    0m0.572s
> sys     0m0.040s
> 
> It cost 20s which isn't worth (The host has 128 threads, it should cost more
> time on less power host), only set BBFILES according to known layers (currently:
> meta-python, networking-layer and virtualization-layer) can fix the problem.
> 
> Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
> ---
>   conf/layer.conf | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/conf/layer.conf b/conf/layer.conf
> index f773dc3..0ad766c 100644
> --- a/conf/layer.conf
> +++ b/conf/layer.conf
> @@ -8,7 +8,8 @@ BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
>   # Let us add layer-specific bbappends which are only applied when that
>   # layer is included in our configuration
>   BBFILES += "${@' '.join('${LAYERDIR}/%s/recipes*/*/*.bbappend' % layer \
> -               for layer in BBFILE_COLLECTIONS.split())}"
> +               for layer in set(BBFILE_COLLECTIONS.split()) & \
> +               set(['meta-python', 'networking-layer', 'virtualization-layer']))}"
>   
>   BBFILE_COLLECTIONS += "selinux"
>   BBFILE_PATTERN_selinux = "^${LAYERDIR}/"
>