Re: [bitbake-devel] [PATCH] Support add-layer to prepend

[Richard Purdie <richard.purdie@linuxfoundation.org>]

On Mon, 2024-02-05 at 03:31 -0800, nvhieudt11@gmail.com wrote:
> As you know, layer order in BBLAYERS can affect in parsing recipes process,
> in some cases, users want to add a layer on the top of BBLAYERS variable
>  
> So, add "--prepend" option for bitbake-layers to support add-layer to prepend
>  
> Signed-off-by: Hieu Van Nguyen <hieu2.nguyen@lge.com>
> ---
>  lib/bb/utils.py        | 7 +++++--
>  lib/bblayers/action.py | 3 ++-
>  2 files changed, 7 insertions(+), 3 deletions(-)


Unfortunately this patch has caused some really obscure build failures e.g.:

https://autobuilder.yoctoproject.org/typhoon/#/builders/80/builds/6487/steps/14/logs/stdio
and
https://autobuilder.yoctoproject.org/typhoon/#/builders/87/builds/6519/steps/14/logs/stdio

To prove it, you can in parallel run:

inotifywait . -m -e create -e access  ./recipes-devtools/makedevs/ ./recipes-devtools/ ./recipes-devtools/makedevs/makedevs/

on the meta directory and then in a different terminal:

oe-selftest -r devtool.DevtoolUpdateTests.test_devtool_update_recipe_local_files -j 2 -K

and what you'll see is:

./recipes-devtools/makedevs/makedevs/ CREATE makedevs.c
./recipes-devtools/makedevs/ CREATE makedevs_1.0.1.bb

amongst the accesses.

The devtool test code (meta/lib/oeqa/selftest/cases/devtool.py)
isolates it's changes to a copy of the meta directory using the
function you're chaging but this change stops that copy from working
correctly and breaks that isolation.

Cheers,

Richard