Re: [Buildroot] how to get buildroot to update a git repo that has changes? (ie building HEAD vs a specific SHA)

[Baruch Siach via buildroot <buildroot@buildroot.org>]

Hi Tim,

On Thu, May 05 2022, Tim Harvey wrote:
> Greetings,
>
> I use buildroot to build a Linux kernel+ramdisk using:
> BR2_LINUX_KERNEL_CUSTOM_GIT=y
> BR2_LINUX_KERNEL_CUSTOM_REPO_URL=<gitrepo>
> BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION=<gitbranch>
>
> When the upstream branch changes I would like to build that kernel but
> I find that buildroot caches the repo in dl/linux/.git and doesn't
> seem to know how to check to see if there are new commits.
>
> I realize that this is atypical as typically you want to configure
> buildroot for a specific package gitsha/tag.
>
> How would I go about getting buildroot to update the repo? I don't
> particularly want to rm dl/linux I want to instead somehow check to
> see if the repo needs a refresh then refresh it without a massive
> network download.

Using a branch name for _VERSION is not supported. See the rationale in
the manual section 18.6.2, note on LIBFOO_VERSION description.

  https://buildroot.org/downloads/manual/manual.html

You might want to consider using OVERRIDE_SRCDIR to make Buildroot build
your local kernel source tree. See section 8.14.6 in the manual.

Hope this helps,
baruch

-- 
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