Re: [PATCH v4] templates: introduce GRUB_TOP_LEVEL_* vars

[Oskari Pirhonen <xxc3ncoredxx@gmail.com>]

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On Mon, Oct 17, 2022 at 03:35:32 -0700, Denton Liu wrote:
> A user may wish to use an image that is not sorted as the "latest"
> version as the top-level entry. For example, in Arch Linux, if a user
> has the LTS and regular kernels installed, `/boot/vmlinuz-linux-lts`
> gets sorted as the "latest" compared to `/boot/vmlinuz-linux`. However,
> a user may wish to use the regular kernel as the default with the LTS
> only existing as a backup.
> 
> Introduce the GRUB_TOP_LEVEL, GRUB_TOP_LEVEL_XEN and
> GRUB_TOP_LEVEL_OS_PROBER variables to allow users to specify the
> top-level entry.
> 
> Create grub_move_to_front() as a helper function which moves entries to
> the front of a list. This function does the heavy lifting of moving
> the menu entry to the front in each script.
> 
> In 10_netbsd, since there isn't an explicit list variable, extract the
> items that are being iterated through into a list so that we can
> optionally apply grub_move_to_front() to the list before the loop.
> 
> Signed-off-by: Denton Liu <liu.denton@gmail.com>

Reviewed-by: Oskari Pirhonen <xxc3ncoredxx@gmail.com>

I've tested it on Linux, but the other platforms and os-prober are still
untested.

- Oskari

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