On Thu, 2 Nov 2023 at 10:02, Alexander Kanavin via
lists.yoctoproject.org <alex.kanavin=gmail....@lists.yoctoproject.org>
wrote:
> So here's what I'd like to try:
>
> - write a new populate_build_replica task that writes a few things
> under ${WORKDIR}/replica
> -- setup-layers json and script
> (another option is to copy the layer trees themselves like esdk does,
> which is left for maybe later. Completely offline replication is not
> an initial goal, and it's good to get to a minimally viable
> implementation asap.)
> -- meta-build-config layer with the local.conf/bblayer.conf template.
> -- sstate cache needed to fulfil the bitbake target that the task is
> for (this would reuse code from esdk that does the same as much as
> possible)
>
> All of this is then packaged into a self-extracting shell archive that:
> - unpacks itself
> - fetches layers using the json/script from the unpacked tree
> - sets up a build directory using the template from meta-build-config
> in the unpacked tree
> - tweaks site.conf to point to the prepackaged sstate
>
> And voila! (in theory) This should be the same build as the one that
> was produced elsewhere.I started writing this as a bitbake task, but then quickly hit an obstacle: bitbake-layers deadlocks when executed in a bitbake task. At which point it dawned on me: all of the required functions are available in command-line utility form, and so this should be a script as well, with as many options as people find useful (as opposed to bitbake tasks which are more difficult to parametrize). So: - bitbake -S lockedsigs to get the list of sstate objects - gen-lockedsig-cache to populate a newly made sstate cache directory with them (optional) - bitbake-layers to save the layer configuration and build configuration Then either leave all that in an unpacked form, or package it up in a self-extracting shell archive or plain tarball. It would also contain a script that would set up a plain bitbake build from what is in the archive. This could be poky/scripts/oe-replicate-build ? Alex
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