Hi Jan,

On 2018-09-04 09:17, [ext] Jan Kiszka wrote:
> Hi all,
> 
> for installing a bootloader into an image, a number of packages have to 
> be installed into the buildchroot. These can be prebuilt packages or 
> packages we build via Isar. Currently, we only handle the case of WIC 
> requiring prebuilt Debian packages, and that in a hacky way (no proper 
> distro abstraction, unneeded installation of unused dependencies). This 
> proposal aims at providing a more holistic solution:
> 
> - Introduce new variables that express the two types of dependencies:
>     - BOOTLOADER_PREBUILT
>     - BOOTLOADER_CUSTOM
> 
>    So there is no "WIC" in these, any imaging recipe can use them.
> 
> - Imaging recipes (e.g. via classes/wic-img.bbclass) should
>     - install all packages from BOOTLOADER_PREBUILT and BOOTLOADER_CUSTOM
>       into the buildchroot
>     - DEPEND on all recipes in BOOTLOADER_CUSTOM
> 
> - Define some common dependencies in conf/distro/${DISTRO}.conf:
>     - GRUB_PREBUILT
>     - GRUB_PREBUILT_append_${DISTRO_ARCH}
>     - SYSLINUX_PREBUILT
>     - ...
> 
>    Those variables can then be used to initialize BOOTLOADER_PREBUILT as
>    needed and also replace those nasty BUILDCHROOT_PREINSTALL_WIC in
>    buildchroot-target.bb.
> 
> - Set BOOTLOADER_PREBUILT or BOOTLOADER_CUSTOM in the
>    conf/machine/${MACHINE}.conf or some overriding conf file - basically
>    the same one that selects IMAGE_TYPE and WKS_FILE.
> 
> Anything I missed? Better suggestions? Eventually, when we can derive 
> bitbake recipe dependencies automatically from package dependencies, 
> PREBUILT and CUSTOM could be folded together. Right now, we need that 
> split.
> 
> Jan

I have a class that I use for the current project that allows installing 
additional packages into the buildchroot from within the image. I didn't 
had time to prepare patches for it for mainline isar. But maybe that 
goes into to right direction.

I attached it.

Cheers,
Claudius

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