Re: Offline build failure

[Tobias Geerinckx-Rice <me@tobias.gr>]

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Hullo Greg,

Greg Hogan 写道：
> If there is a better way to setup / configure / execute offline 
> builds
> please let me know!

...yes :-)

> I am attempting an offline build without success. I have a Guix 
> 1.2.0 node
> with internet access on which I download sources with transitive
> dependencies:
>   $ guix build --sources=transitive tzdata > ~/transfer

OK.

> I then copy the files as root to a Guix 1.2.0 node without 
> internet access
> (only local network access):
>   # cat /home/<user>/transfer | xargs -n 1 -I{} scp -p {} 
>   <ip>:{}

Now you've basically reinvented ‘guix copy --to=<ip>’, but in a 
way that won't update the store database in /var/guix/db.  I'm 
afraid that won't work.

Guix won't ‘see’ the files you copy to the remote store and will 
consider them G to be C'd next time you run ‘guix gc’.  Or in this 
case:

> Guix starts downloading and the transferred file is gone!

Same thing.

> I'm lost as to
> why a new download attempt is made as the file data and 
> timestamps match
> the original server.

If the file isn't registered in the database, the store item is 
never considered valid.  Guix doesn't (yet) care about the 
data/timestamps at this point.

If there's a reason you can't/won't use ‘guix copy’, you might 
work around that by copying each file in ~/transfer to, say, 
<ip>:/tmp/staging (instead of <ip>:/gnu/store), then running ‘guix 
download /tmp/staging/<file>...’ on the remote host.

Kind regards,

T G-R

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