bug#54370: guix.gnu.org is inaccessible from Russia

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

I updated the onion address in the section of the cookbook that explains
how to get substitutes from ci.guix over Tor:

  https://guix.gnu.org/cookbook/en/html_node/Getting-substitutes-from-Tor.html

Copying the text inline below.

Next step is to publish an Onion service for the web site.

HTH,
Ludo’.

3.8 Getting substitutes from Tor
================================

Guix daemon can use a HTTP proxy to get substitutes, here we are
configuring it to get them via Tor.

     Warning: _Not all_ Guix daemon’s traffic will go through Tor!  Only
     HTTP/HTTPS will get proxied; FTP, Git protocol, SSH, etc
     connections will still go through the clearnet.  Again, this
     configuration isn’t foolproof some of your traffic won’t get routed
     by Tor at all.  Use it at your own risk.

     Also note that the procedure described here applies only to package
     substitution.  When you update your guix distribution with ‘guix
     pull’, you still need to use ‘torsocks’ if you want to route the
     connection to guix’s git repository servers through Tor.

   Guix’s substitute server is available as a Onion service, if you want
to use it to get your substitutes through Tor configure your system as
follow:

     (use-modules (gnu))
     (use-service-module base networking)

     (operating-system
       …
       (services
         (cons
           (service tor-service-type
                   (tor-configuration
                     (config-file (plain-file "tor-config"
                                              "HTTPTunnelPort 127.0.0.1:9250"))))
           (modify-services %base-services
             (guix-service-type
               config => (guix-configuration
                           (inherit config)
                           ;; ci.guix.gnu.org's Onion service
                           (substitute-urls
                            "https://4zwzi66wwdaalbhgnix55ea3ab4pvvw66ll2ow53kjub6se4q2bclcyd.onion")
                           (http-proxy "http://localhost:9250")))))))

   This will keep a tor process running that provides a HTTP CONNECT
tunnel which will be used by ‘guix-daemon’.  The daemon can use other
protocols than HTTP(S) to get remote resources, request using those
protocols won’t go through Tor since we are only setting a HTTP tunnel
here.  Note that ‘substitutes-urls’ is using HTTPS and not HTTP or it
won’t work, that’s a limitation of Tor’s tunnel; you may want to use
‘privoxy’ instead to avoid such limitations.

   If you don’t want to always get substitutes through Tor but using it
just some of the times, then skip the ‘guix-configuration’.  When you
want to get a substitute from the Tor tunnel run:

     sudo herd set-http-proxy guix-daemon http://localhost:9250
     guix build \
       --substitute-urls=https://4zwzi66wwdaalbhgnix55ea3ab4pvvw66ll2ow53kjub6se4q2bclcyd.onion ...