On Tue, Feb 18, 2020 at 12:31:39PM +0100, Pierre Neidhardt wrote:
> Hi!
> 
> The 'mame' package is not available on ci.guix.gnu.org for some reason,
> so I did build it locally on my desktop.
> 
> Now I'd like to transfer this build artifact to my laptop.
> 
> On my desktop I ran
> 
> --8<---------------cut here---------------start------------->8---
> sudo guix archive --generate-key
> sudo guix publish 
> --8<---------------cut here---------------end--------------->8---

did you transfer the public key to your other machine and run 'sudo guix
archive --import < /path/to/public/key'?

> 
> Then on my laptop I ran
> 
> --8<---------------cut here---------------start------------->8---
> guix time-machine --commit=a74e231 -- build mame --substitute-urls="http://192.168.1.27:8080 https://ci.guix.gnu.org"
> --8<---------------cut here---------------end--------------->8---
> 
> The desktop then displays a bunch of
> 
> --8<---------------cut here---------------start------------->8---
> GET /ddjh5vxa692nllffzz92mvyclqv79bkn.narinfo
> GET /j8hk0nv8fn5k5i55z85jhs41x2hvcy5n.narinfo
> ...
> --8<---------------cut here---------------end--------------->8---
> 

I wasn't sure about needing to specify more flags with 'sudo guix
publish' but it looks like it was correct.

> so I guess this means publishing works.
> However my laptop does not fetch the mame substitute and starts building
> mame again, which takes hours.

Try giving it a few minutes to "bake" the substitute and then serve it.
It needs to re-compress it to make transfers (at a large scale) more
economical.

> 
> Any idea what's wrong?
> 

Doesn't address the substitute/publish problem, but have you tried using
guix copy to copy it over?


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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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