classes: bundle: support multiconfig dependencies for slots

[a3f]

Users may want to populate a slot with an image resulting from a multiconfig build. This can be especially useful with RAUC variants:

• Same rootfs slots for both MACHINEs
• different bootloader images, depending on MACHINE

For this to work out of the box, bundle.bbclass will need some multiconfig awareness to emit mcdepends instead of depends when depending on a multiconfig recipe.

With this addressed, following slots definition is now possible:

  RAUC_SLOT_bootloader-othermachine = "mc::othermachine:bootloader"
  RAUC_SLOT_bootloader-othermachine[name] = "bootloader.othermachine"
  RAUC_SLOT_bootloader-othermachine[type] = "boot"
  RAUC_SLOT_bootloader-othermachine[file] = "../othermachine/bootloader.img"

No functional change intended for non-multiconfig users.

[a3f]

I have the equivalent on zeus and it works well. I left this as a draft until I can test this against a more up to date Yocto release. Comments welcome in the meantime though!

[a3f]

I left this as a draft until I can test this against a more up to date Yocto release.

I have now tested this with hardknott and it works fine.

[a3f]

In the meantime, I have added an intermediary recipe that does basically:

OTHERMACHINE_DEPLOYDIR= "../../../../tmp_mc-othermachine/deploy/images/othermachine"
do_deploy[mcdepends] += "mc::othermachine:originalrecipe:do_deploy
do_deploy () {
  cd ${DEPLOY_DIR_IMAGE}
  ln -sf ${OTHERMACHINE_DEPLOYDIR}/artifact-othermachine $ ${DEPLOYDIR}/
}

So I am no longer using the changes I originally submitted here. I will try to find some time in a few weeks to incorporate your feedback and retest.

[ejoerns]

@a3f Any update on this or interest in the topic? Or should we close this until someone needs mc deps again?

[a3f]

Sorry, didn't find the time to address the feedback. As I don't currently use it, I'll close till there's renewed interest.