Substitutes from multiple server

Substitutes from multiple server

[Ludovic Courtès]

It’s now possible to really use multiple substitute servers, as in:

  guix build foo --substitute-urls='http://example.org http://hydra.gnu.org'

Here Guix first looks for substitutes at example.org, and then falls
back to gnu.org for those that were not found.

The basics were in place but commit 55b2fc1 adds the missing bits.

Unfortunately, due to <http://bugs.gnu.org/20217>, the daemon’s
--substitute-urls is overridden by clients, so you really have to pass
--substitute-urls to various ‘guix’ commands.

Unfortunately², because URLs are whitespace-separated, one cannot put
the option in the ‘GUIX_BUILD_OPTIONS’ environment variable, because
that one is simply split up using ‘string-tokenize’.

Anyway, future work!

Ludo’.

Re: Substitutes from multiple server

[Thompson, David]

On Wed, Oct 28, 2015 at 7:14 AM, Ludovic Courtès <ludo@gnu.org> wrote:
> It’s now possible to really use multiple substitute servers, as in:
>
>   guix build foo --substitute-urls='http://example.org http://hydra.gnu.org'
>
> Here Guix first looks for substitutes at example.org, and then falls
> back to gnu.org for those that were not found.
>
> The basics were in place but commit 55b2fc1 adds the missing bits.

Awesome!  One step closer to 'guix publish' being a generally useful
tool.  I'd like to run my own substitute server to provide some custom
binaries while fetching everything else from hydra.gnu.org.

> Unfortunately, due to <http://bugs.gnu.org/20217>, the daemon’s
> --substitute-urls is overridden by clients, so you really have to pass
> --substitute-urls to various ‘guix’ commands.
>
> Unfortunately², because URLs are whitespace-separated, one cannot put
> the option in the ‘GUIX_BUILD_OPTIONS’ environment variable, because
> that one is simply split up using ‘string-tokenize’.

It will be a great day when these limitations are removed.

Thanks!

- Dave

Re: Substitutes from multiple server

[Ludovic Courtès]

ludo@gnu.org (Ludovic Courtès) skribis:

> Unfortunately, due to <http://bugs.gnu.org/20217>, the daemon’s
> --substitute-urls is overridden by clients, so you really have to pass
> --substitute-urls to various ‘guix’ commands.

This one was so lame that a solution came to mind, implemented in
fb4bf72.

So I’m happy to report that this can be used reasonably easily now.  :-)

Ludo’.