Re: ‘guix publish’ as a content-addressed file server

[Ludovic Courtès]

Hello,

address@hidden (Ludovic Courtès) skribis:

> Until now, if hydra.gnu.org had a source file in its store (the result
> of an ‘origin’), you could get it via substitutes.  However, with
> substitutes disabled, hydra.gnu.org was of no help, even though it did
> have the source file.
>
> Commit ff6638d112d794c9c433731643711932452fd2ff helps address that: it
> augments ‘guix publish’ such that it can be used as a content-addressed
> mirror for source files¹.
>
> If you run ‘guix publish -p 9999’ on your machine, and if
> hello-2.10.tar.gz is in the store, then this URL:
>
>   
> http://localhost:9999/file/hello-2.10.tar.gz/sha256/0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i
>
> … gives you hello-2.10.tar.gz.

guix-maintenance commit 7f59985566b384e31da7e6f1a36744e9edfba54f adds
nginx proxying for those /file URLs (‘guix publish’ is now running on
hydra.gnu.org, though we only use it for those /file URLs;
mirror.hydra.gnu.org proxies and caches those requests):

--8<---------------cut here---------------start------------->8---
$ wget -q -O - 
https://mirror.hydra.gnu.org/file/hello-2.10.tar.gz/sha256/0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i
 | guix hash /dev/stdin
0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i
--8<---------------cut here---------------end--------------->8---

Guix commit 40f788b9f6184436d9cc36a4dd8e7d101cd2f0ba adds
mirror.hydra.gnu.org as a content-addressable mirror.

Ludo’.