On Fri, Aug 11, 2023 at 12:47 AM, Ross Burton wrote: > > On 11 Aug 2023, at 03:21, Jiliang Cai via lists.yoctoproject.org > <tyrocjl=gmail....@lists.yoctoproject.org> wrote: > >> I have a recipe abc_1.0.bb. It generates a txt contains all layers git >> commit >> ID into /etc. It is installed into image by IMAGE_INSTALL:append = " abc". > > > If you want a list of layers/SHAs in your image, look at the > image-buildinfo class.
*I use this bbclass, but it sometimes records inaccurate SHAs.* For example, when I first bitbake based a dirty layer meta-aaa, the SHA works as expected, followed by a 'modified'. But when I submitted the meta-aaa modification and ran bitbake again, nothing happened, and the file /etc/build was not regenerated. *Although meta-aaa is already clean at this time, the old SHA and 'modified' are* *still displayed in the rootfs build file. * Is there any good way to solve this problem ？ > > >> I want to rebuild abc every time I execute bitbake <image>. So I set >> nostamp to >> 1 in abc_1.0.bb. >> >> It served my purpose. When I execute bitbake core-image-minimal, abc_1.0 >> is >> always rebuilt, even if it was built last time without any changes. >> >> But, it leads to re-do_rootfs every time, and repackages images in formats >> such >> as tar. >> >> I expect that when the txt generated by abc_1.0 has not changed, do_rootfs >> >> should not be re-executed, what should I do? > > Of course it does: you explicitly told bitbake that this recipe _must_ be > re-run and doesn’t have stamps to identify if it can be reused or not. Use > the image-buildinfo class. I set nostamp to 1 in abc_1.0.bb, also to solve the problem similar to the above image-buildinfo.bbclass. But this introduces a new problem: it sometimes leads to unnecessary execution of tasks such as do_rootfs. *Is there any good way to solve this problem ？* > > Ross
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