[meta-rauc] yocto sstate caching of bundles

[meta-rauc] yocto sstate caching of bundles

[Martin Hollingsworth]

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Hello meta-rauc list,

Is anyone here using Yocto SSTATE caching together with meta-rauc?

https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#shared-state-cache



We enabled sstate caching a few days weeks ago, and are now seeing that our build outputs for image and bundle have different build timestamps. The image file is always with the current timestamp, while the bundle often uses an older timestamp. I would assume a bundle must always be rebuild from the current image.



Example:

<imagename>-<machine> -20211020001242.rootfs.wic.xz

<bundlename><machine>-20211015001217.raucb



Anyone stumbled upon that?



Thanks and Greetings,

Martin Hollingsworth


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Re: [meta-rauc] yocto sstate caching of bundles

[Martin Hollingsworth]

Hello meta-rauc,
to answer my own question, to mitigate the bundle SSTATE cache issue, I have added the following line into our bundle recipes:
SSTATE_SKIP_CREATION = "1"

According to this post, this disables adding the final recipe output to the SSTATE cache, thus forcing a rebuild of the bundle.
https://stackoverflow.com/q/69674939/2590485

Hope that helps.
Regards,
Martin

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