Re: Bug report: cache-deb-src fails with 'debsrc_undo_mounts: not found' on isar v1.1

[Anton Mikanovich <amikan@ilbers.de>]

Hello Amaia,

Thanks for the reporting, the function 'debsrc_undo_mounts' is leftover 
after:

9ad502bb deb-dl-dir: optimize caching of source packages using apt natively

Will prepare a patch with removing it.

For the second point we need to have a look and will back soon.

21.05.2026 13:42, 'Amaia Gomez' via isar-users wrote:
>
> Hello isar-users,
>
> I am trying to use the cache-deb-src feature to cache upstream Debian 
> source packages for long-term reproducibility. I am running isar v1.1 
> (commit cc5a5d98) on Debian 13 (Trixie) amd64, building an image for 
> an Intel Elkhart Lake (x86_64) target with Debian Trixie.
>
> Configuration in local.conf:
>
>   BASE_REPO_FEATURES = "cache-deb-src"
>
> The build fails with:
>
>   ERROR: No packages were found in apt cache
>
>   run.do_cache_deb_src: debsrc_undo_mounts: not found
>
>   WARNING: exit code 127 from a shell command.
>
> I found two issues:
>
> 1. The function 'debsrc_undo_mounts' is called in 
> meta/classes-recipe/deb-dl-dir.bbclass (line ~150) when the apt cache 
> is empty, but this function is not defined anywhere in the isar 
> codebase. This causes exit code 127 (command not found).
>
> 2. Even with ROOTFS_FEATURES:remove = "clean-package-cache", the 
> function rootfs_export_package_cache executes BEFORE 
> rootfs_install_pkgs_install in the ROOTFS_INSTALL_COMMAND sequence. 
> This means the apt cache is still empty when the export runs, because 
> the packages have not been downloaded yet.
>
> The execution order observed in the log is:
>
>   rootfs_export_package_cache  (cache is empty at this point)
>
>   rootfs_install_clean_files
>
>   rootfs_install_pkgs_install  (packages are downloaded here)
>
> Is there a workaround available? Is this a known issue?
>
> Thank you,
>
> Amaia Gomez
>
>
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