Re: SSH error guix pull

[Wojtek Kosior]

> Starting service root...
> Service root started.
> Service root running with value #t.
> Service root has been started.
> Uncaught exception while loading configuration file 
> '/home/mst/.config/shepherd/init.scm': (goops-error #f "No 
> applicable method for ~S in call ~S" (#<<generic> service-actions 
> (1)> (service-actions shepherd)) ())  
> ```
> 
> which I don't know how to fix.

I see…  I've never been using shepherd alone, in separation from Guix
but I see that my Guix-generated user shepherd config has this

--8<---------------cut here---------------start------------->8---
(action 'root 'daemonize)
--8<---------------cut here---------------end--------------->8---

while the example you linked to uses

--8<---------------cut here---------------end--------------->8---
(perform-service-action 'shepherd 'daemonize)
--8<---------------cut here---------------start------------->8---

Anyway, if there's no strong reason for not using Guix home, I'd suggest
using it.  I mean the `guix home` command and its subcommands.  It
handles — among others — shepherd configuration.  The link I gave
earlier was about using SSH through Guix home.

> > Btw, there's perhaps another solution — pull from local git 
> > checkout.
> > You can pass a filesystem path instead of a url when running 
> > `guix
> > pull`. This might later cause some issues if you try to `sudo 
> > guix
> > system reconfigure` but that's another topic…  
> 
> I was able to install a package like this but it's not ideal.

You can also set serve a cloneable git repo over HTTP on localhost…
Here's a sample script for this that I happen to have written for my own
purposes just today ;)

--8<---------------cut here---------------start------------->8---
#!/usr/bin/env -S guix repl --
!#

;; SPDX-License-Identifier: CC0-1.0

;; Copyright (C) 2023 Wojtek Kosior <koszko@koszko.org>
;;
;; Available under the terms of Creative Commons Zero v1.0 Universal.

(use-modules ((guix gexp) #:select
              (gexp file-append mixed-text-file program-file lower-object))
             ((gnu packages version-control) #:select (git))
             ((gnu packages web) #:select (lighttpd))
             ((guix store) #:select (run-with-store with-store %store-monad))
             ((guix monads) #:select (mlet mbegin return))
             ((guix derivations) #:select
              (built-derivations derivation-output-path derivation-outputs)))

(define here
  (dirname (current-filename)))

(define git-http-backend
  (file-append git "/libexec/git-core/git-http-backend"))

(define lighttpd-config
  (mixed-text-file "lighttpd.conf"
                   "\
server.document-root = \"/dev/null\"
server.modules = ( \"mod_alias\", \"mod_cgi\", \"mod_setenv\")
server.port = 8098

alias.url = ( \"/guix\" => \"" git-http-backend "\" )
cgi.assign = (\"\" => \"\")

setenv.add-environment = (
    \"GIT_PROJECT_ROOT\" => \"" here "\" + \"/.git\",
    \"GIT_HTTP_EXPORT_ALL\" => \"\"
)
"))

(define run-lighttpd-guix-repo-server
  (program-file "run-lighttpd-guix-repo-server"
                #~(system* #$(file-append lighttpd "/sbin/lighttpd") "-D"
                           "-f" #$lighttpd-config)))

(system*
 (with-store store
   (run-with-store store
     (mlet %store-monad ((script-drv (lower-object
                                      run-lighttpd-guix-repo-server)))
       (mbegin %current-monad
         (built-derivations (list script-drv))
         (return (derivation-output-path
                  (assoc-ref (derivation-outputs script-drv) "out"))))))))
--8<---------------cut here---------------end--------------->8---

One can write it as, say, "serve-git-repo.scm" in a git project
checkout (possibly also listing it in `.git/info/exclude` to have git
ignore it).  Then `chmod +x` it and run — if all goes OK, it should
serve the repo at: http://localhost:8098/guix

It's then possible to do e.g.

--8<---------------cut here---------------start------------->8---
guix pull --url=http://localhost:8098/guix
--8<---------------cut here---------------end--------------->8---

The benefit is that the aforementioned `guix system reconfigure` seems
to work afterwards (although the local git repo server needs to be
running during this time).

Voila!  We no longer need to rely on remote git servers availability :)
It'd make sense to also spawn this HTTP server through shepherd.
And to generalize it to be able to serve multiple repos at once — for
example a custom Guix tree, a channel other than "guix" and some
software projects

Best
Wojtek


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On Fri, 01 Dec 2023 12:37:58 -0600 Mauritz Stenek <mstenek@disroot.org> wrote:

> On 2023-12-01 at 07:12, Wojtek Kosior <koszko@koszko.org> wrote:
> 
> > [[PGP Signed Part:Undecided]]
> > Hi
> >  
> >> However, on a full Guix system I keep getting this error:
> >> 
> >> ```
> >> guix pull: error: Git error: error authenticating: no auth sock 
> >> variable
> >> ```
> >> 
> >> and, for the life of me, I just can't get it to work.  
> >
> > Maybe you're not running ssh user agent daemon under your user? 
> > You
> > need it for this to work.
> >
> > You can probably spawn it in a number of ways.  One of them 
> > would be
> > through Guix home.  See this[1] Guix manual node for info about
> > ssh-agent's home service :)
> >
> > Also, you're not running `guix pull` with sudo, are you?  It 
> > wouldn't
> > work this way because sudo erases environment variables, 
> > including
> > "SSH_AUTH_SOCK".
> >
> > Btw, on my fully Guixified laptop I am using Guix home without
> > ssh-agent configured and yet I do have ssh-agent running under 
> > my user.
> > I'm not sure what started it…  
> 
> Seems like that is the situation. I actually tried to run the 
> ssh-agent user service example in the shepherd manual 
> (https://www.gnu.org/software/shepherd/manual/html_node/Managing-User-Services.html)
>  
> -- verbatim -- and I get this error:
> 
> ```
> Starting service root...
> Service root started.
> Service root running with value #t.
> Service root has been started.
> Uncaught exception while loading configuration file 
> '/home/mst/.config/shepherd/init.scm': (goops-error #f "No 
> applicable method for ~S in call ~S" (#<<generic> service-actions 
> (1)> (service-actions shepherd)) ())  
> ```
> 
> which I don't know how to fix.
> 
> Other than that example, I'm at a loss with ssh.
> 
> >  
> >> (disclaimer: I'm a total scheme/guile neophyte -- and am 
> >> learning 
> >> as I go)  
> >
> > As all of us, haha :D  
> 
> :D
> 
> >
> > Btw, there's perhaps another solution — pull from local git 
> > checkout.
> > You can pass a filesystem path instead of a url when running 
> > `guix
> > pull`. This might later cause some issues if you try to `sudo 
> > guix
> > system reconfigure` but that's another topic…  
> 
> I was able to install a package like this but it's not ideal.
> 
> > Good luck and happy hacking!  
> 
> Thanks! I can tell you, it is a journey.
> 
> > Wojtek
> >
> > [1] 
> > https://guix.gnu.org/manual/devel/en/html_node/Secure-Shell.html
> >
> >
> > -- (sig_start)
> > website: https://koszko.org/koszko.html
> > fingerprint: E972 7060 E3C5 637C 8A4F  4B42 4BC5 221C 5A79 FD1A
> > follow me on Fediverse: 
> > https://friendica.me/profile/koszko/profile
> >
> > ♥ R29kIGlzIHRoZXJlIGFuZCBsb3ZlcyBtZQ== | ÷ 
> > c2luIHNlcGFyYXRlZCBtZSBmcm9tIEhpbQ==
> > ✝ YnV0IEplc3VzIGRpZWQgdG8gc2F2ZSBtZQ== | ? 
> > U2hhbGwgSSBiZWNvbWUgSGlzIGZyaWVuZD8=
> > -- (sig_end)
> >
> >
> > On Thu, 30 Nov 2023 19:47:43 -0600 Mauritz Stenek 
> > <mstenek@disroot.org> wrote:
> >  
> >> I'm trying out Guix and created a personal (private) channel 
> >> with 
> >> some custom packages. I access my git repo with ssh.
> >> 
> >> Using Guix on a foreign distro, pulling from my git repo works 
> >> fine after applying this strategy: 
> >> https://issues.guix.gnu.org/31285.
> >> 
> >> However, on a full Guix system I keep getting this error:
> >> 
> >> ```
> >> guix pull: error: Git error: error authenticating: no auth sock 
> >> variable
> >> ```
> >> 
> >> and, for the life of me, I just can't get it to work.
> >> 
> >> (disclaimer: I'm a total scheme/guile neophyte -- and am 
> >> learning 
> >> as I go)
> >> 
> >> Please help.
> >>   
> >
> > [[End of PGP Signed Part]]  
> 
>

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