Re: [PATCH] Fix cache-deb-src functionality for non-amd64 builds

["'cedric.hombourger@siemens.com' via isar-users" <isar-users@googlegroups.com>]

On Thu, 2025-07-17 at 13:51 +0300, Anton Mikanovich wrote:
> Commit f0da749f introduced `apt-cache -o Dir=${rootfs} dumpavail`
> method to get info about packages installed in rootfs, instead of
> parsing dpkg.log previuosly used.

previously

> 
> But it does not work in case of foreing architecture used. The list

foreign

> comes empty and no source packages get downloaded.
> 
> Instead, chroot into the rootfs and run this inside. The difference:

Yes but with a significant performance hit (QEMU)
I can recheck our options. This is a reminder that I had earlier
proposed
https://lists.isar-build.org/isar-users/20250515150727.1764989-1-cedric.hombourger@siemens.com/T/#t
(probably does not address this specific issue though)

> 
> Works for the same arch:
>   apt-cache -o Dir=/build/tmp/work/debian-bookworm-amd64/isar-image-
> base-qemuamd64/1.0-r0/rootfs dumpavail | wc -l
>   1190397
> 
> Doesn't work for the foreign arch:
>   apt-cache -o Dir=/build/tmp/work/debian-bookworm-arm64/isar-image-
> base-qemuarm64/1.0-r0/rootfs/ dumpavail | wc -l
>   0
> 
> After the patch:
>   sudo chroot /build/tmp/work/debian-bookworm-arm64/isar-image-base-
> qemuarm64/1.0-r0/rootfs/ apt-cache dumpavail | wc -l
>   1170789
> 
> Signed-off-by: Anton Mikanovich <amikan@ilbers.de>
> ---
>  meta/classes/deb-dl-dir.bbclass | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/meta/classes/deb-dl-dir.bbclass b/meta/classes/deb-dl-
> dir.bbclass
> index 3f560da4..1f3876db 100644
> --- a/meta/classes/deb-dl-dir.bbclass
> +++ b/meta/classes/deb-dl-dir.bbclass
> @@ -68,7 +68,9 @@ debsrc_download() {
>      trap "rm -f ${avail} ${wanted}" EXIT
>  
>      # List all packages known to apt
> -    apt-cache -o Dir=${rootfs} dumpavail |
> debsrc_source_version_filter > ${avail}
> +    sudo -E chroot --userspec=$( id -u ):$( id -g ) ${rootfs} \
> +        apt-cache dumpavail \
> +        | debsrc_source_version_filter > ${avail}
>  
>      # Use apt-ftparchive to scan all .deb files found in the
> download directory
>      # and get the <source> <version> pairs that we wish to download
> -- 
> 2.34.1
> 

-- 
Cedric Hombourger
Siemens AG
www.siemens.com

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