bug#39575: guix time-machine fails when a tarball was modified in-place

[Ludovic Courtès]

Hi,

Jan Nieuwenhuizen <address@hidden> skribis:

> What about
>
>     
> https://snapshot.debian.org/archive/debian/20190406T212022Z/pool/main/h/harfbuzz/harfbuzz_2.4.0.orig.tar.bz2

Good idea.

> So, this now becomes the recipe
>
>     wget -O harfbuzz-2.4.0.tar.bz2 
> https://snapshot.debian.org/archive/debian/20190406T212022Z/pool/main/h/harfbuzz/harfbuzz_2.4.0.orig.tar.bz2
>     guix download $PWD/harfbuzz-2.4.0.tar.bz2
>     guix time-machine --commit=56e95d54d209c2428f970d65d9b27ae4168449ad 
> --no-offload -- help
>
> that i'm trying now, and for now it looks fine (lots of stuff to build,
> i'll report success or failure when it's done).

OK!

> It seems, however, that for offload builds to work the guix download
> needs to be repeated on the offload build farm machines too?

No, I don’t think so, because the head node copies all the inputs to
build machines before it actually offloads the build.

Ludo’.