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Re: Prevent guix gc from removing *grub.cfg under /gnu/store/

From: Raghav Gururajan
Subject: Re: Prevent guix gc from removing *grub.cfg under /gnu/store/
Date: Tue, 19 Feb 2019 23:26:40 +0000

Thanks for your reply. I am not trying to manually remove anything from 
/gnu/store/. I could use your suggestion if I am building a package through 
"guix build" command. But the file "[...]grub.cfg" under /gnu/store/ is created 
by the system (not user) during "guix system init" process. So how can I 
prevent "guix gc" process from removing a system created file? Thanks! 

February 19, 2019 6:14 PM, "Björn Höfling" <address@hidden> wrote:

> On Tue, 19 Feb 2019 18:15:34 +0000
> "Raghav Gururajan" <address@hidden> wrote:
>> Hi Guix!
>> Since my BIOS comes with in-built grub payload, I did not want to
>> install bootloader on disk (but do want grub.cfg file
>> under /gnu/store/), so I passed --no-bootloader parameter during guix
>> system init. The guix system got successfully instantiated and there
>> was *grub.cfg file under /gnu/store/. The file stayed even after
>> multiple reboot, guix pull and guix package -u. But when I did guix
>> gc, it removed the *grub.cfg file under /gnu/store/. How can I
>> prevent this from happening? Since I am a novice user, please provide
>> me step-wise explanation.
> Hi,
> I'm not 100% sure that what you are doing is correct in the Guix-sense.
> Anyway, what's important is that you never delete from the /gnu/store
> manually, always use guix gc, as you did.
> To prevent things in the store from garbage collection, you can use the
> additional build parameter "--root=file", see here:
> i.e. guix build ... --root=/home/me/my-gc-root
> That would prevent the gc to remove that file, as long as that created
> link points to the store entry.
> Hope this helps,
> Björn

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