Re: Unable to get rid of guix-past (and unable to pull)

[James Smith]

Gabriel Wicki <gabriel@erlikon.ch> writes:

> Howdy!
>
> So, mysterious things seem to happen on my machines - yes, that's right,
> i managed to reproduce the following behaviour.  But see yourself:
>
> Guix pull fails (has guix-past been rebased or force-pushed?)
>
>     gabriel@silvi ~$ guix pull
>     Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
>     Updating channel 'gabber' from Git repository at 
> 'https://git.sr.ht/~gabber/gabber-channel'...
>     Updating channel 'nonguix' from Git repository at 
> 'https://gitlab.com/nonguix/nonguix'...
>     Updating channel 'guix-gaming-games' from Git repository at 
> 'https://gitlab.com/guix-gaming-channels/games.git'...
>     Updating channel 'guix-past' from Git repository at 
> 'https://codeberg.org/guix-science/guix-past.git'...
>     guix pull: error: aborting update of channel 'guix-past' to commit 
> f99ada4123de1eadf668d34dac2d726407634549, which is not a descendant of 
> 5fb77cce01f21a03b8f5a9c873067691cf09d057
>     hint: This could indicate that the channel has been tampered with and is 
> trying to force a roll-back,
>     preventing you from getting the latest updates.  If you think this is not 
> the case, explicitly allow
>     non-forward updates.
>
> So i investigate:
>
>     gabriel@silvi ~$ guix describe
>     Generation 21     Oct 23 2024 22:56:15    (current)
>     guix 5f4ba1c
>         repository URL: https://git.savannah.gnu.org/git/guix.git
>         branch: master
>         commit: 5f4ba1c09fa0fba1ed230b80bae9f6a4d0d2d303
>     gabber 20f7905
>         repository URL: https://git.sr.ht/~gabber/gabber-channel
>         branch: trunk
>         commit: 20f7905206826e0d110cab57974b3426683ac814
>     nonguix ad966c3
>         repository URL: https://gitlab.com/nonguix/nonguix
>         branch: master
>         commit: ad966c3844385e8f7b60b0dc915f92a1eba47e09
>     guix-gaming-games 5762eda
>         repository URL: https://gitlab.com/guix-gaming-channels/games.git
>         branch: master
>         commit: 5762eda50230715555da5beb0f4d06a5456bb5c0
>     guix-past 5fb77cc
>         repository URL: https://gitlab.inria.fr/guix-hpc/guix-past
>         branch: master
>         commit: 5fb77cce01f21a03b8f5a9c873067691cf09d057
>
> Weirdly enough, guix-past is not im my channels configuration (which is
> managed by guix home):
>
>     gabriel@silvi ~$ cat .config/guix/channels.scm
>     (list (channel
>             (name 'guix)
>             (url "https://git.savannah.gnu.org/git/guix.git";)
>             (branch "master")
>             (introduction
>             (make-channel-introduction
>                 "9edb3f66fd807b096b48283debdcddccfea34bad"
>                 (openpgp-fingerprint
>                 "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA"))))
>         (channel
>             (name 'gabber)
>             (url "https://git.sr.ht/~gabber/gabber-channel";)
>             (branch "trunk"))
>         (channel
>             (name 'nonguix)
>             (url "https://gitlab.com/nonguix/nonguix";)
>             (branch "master")
>             (introduction
>             (make-channel-introduction
>                 "897c1a470da759236cc11798f4e0a5f7d4d59fbc"
>                 (openpgp-fingerprint
>                 "2A39 3FFF 68F4 EF7A 3D29  12AF 6F51 20A0 22FB B2D5"))))
>         (channel
>             (name 'guix-gaming-games)
>             (url "https://gitlab.com/guix-gaming-channels/games.git";)
>             (branch "master")
>             (introduction
>             (make-channel-introduction
>                 "c23d64f1b8cc086659f8781b27ab6c7314c5cca5"
>                 (openpgp-fingerprint
>                 "50F3 3E2E 5B0C 3D90 0424  ABE8 9BDC F497 A4BB CC7F")))))
>
> And even pulling with explicitly stating the channels file (which i
> thought would **only** pull the channels described in said file) fails
> pulling guix-past -- which is *not* part of that very file:
>
>     gabriel@silvi ~$ guix pull --channels=!$
>     guix pull --channels=.config/guix/channels.scm
>     Updating channel 'guix' from Git repository at 
> 'https://git.savannah.gnu.org/git/guix.git'...
>     Updating channel 'gabber' from Git repository at 
> 'https://git.sr.ht/~gabber/gabber-channel'...
>     Updating channel 'nonguix' from Git repository at 
> 'https://gitlab.com/nonguix/nonguix'...
>     Updating channel 'guix-gaming-games' from Git repository at 
> 'https://gitlab.com/guix-gaming-channels/games.git'...
>     Updating channel 'guix-past' from Git repository at 
> 'https://codeberg.org/guix-science/guix-past.git'...
>     guix pull: error: aborting update of channel 'guix-past' to commit 
> f99ada4123de1eadf668d34dac2d726407634549, which is not a descendant of 
> 5fb77cce01f21a03b8f5a9c873067691cf09d057
>     hint: This could indicate that the channel has been tampered with and is 
> trying to force a roll-back,
>     preventing you from getting the latest updates.  If you think this is not 
> the case, explicitly allow
>     non-forward updates.
>
> Needless to say, `guix-past' is (seemingly) defined nowhere on my
> system.
>
>     gabriel@silvi ~$ sudo cat /etc/guix/channels.scm
>     (list (channel (name (quote guix)) (url 
> "https://git.savannah.gnu.org/git/guix.git";) (branch "master") (introduction 
> (make-channel-introduction "9edb3f66fd807b096b48283debdcddccfea34bad" 
> (openpgp-fingerprint "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA")))))
>
> Any ideas where this is coming from and/or how i can work around this
> issue?  Or where /else/ i could look.  Thanks for any input!
>
> gabber

Hi Gabriel,

Just like packages can depend on other packages, so Guix channels can
depend on other channels. A channel can define dependencies in the
.guix-channel file at the root of each repository. Checking through each
channel, I found that guix-gaming-games depends on guix-past. As for
getting around it, you could try running "guix pull --roll-back" and try
pulling again.

Hope that helps,

James