bug#29699: [PATCH] guix: offload: Add "status" sub-command.

[Ricardo Wurmus <rekado@elephly.net>]

Ludovic Courtès <ludo@gnu.org> writes:

> Ricardo Wurmus <rekado@elephly.net> skribis:
>
>> Ludovic Courtès <ludo@gnu.org> writes:
>>
>>> Ricardo Wurmus <rekado@elephly.net> skribis:
>>>
>>>> * guix/scripts/offload.scm (check-machine-load): New procedure.
>>>> (guix-offload): Call it when the argument is "status".
>>>> * doc/guix.texi (Daemon Offload Setup): Document it.
>>>
>>> Nice, LGTM!
>>>
>>>> +(define (check-machine-load machine-file pred)
>>>> +  "Print the load of each machine matching PRED in MACHINE-FILE."
>>>> +  (define (build-machine=? m1 m2)
>>>> +    (and (string=? (build-machine-name m1) (build-machine-name m2))
>>>> +         (= (build-machine-port m1) (build-machine-port m2))))
>>>> +
>>>> +  ;; A given build machine may appear several times (e.g., once for
>>>> +  ;; "x86_64-linux" and a second time for "i686-linux"); test them only once.
>>>> +  (let ((machines (filter pred
>>>> +                          (delete-duplicates (build-machines machine-file)
>>>> +                                             build-machine=?))))
>>>> +    (for-each machine-load machines)))
>>>
>>> Perhaps we could also display information from ‘uname’, as in
>>> <https://git.savannah.gnu.org/cgit/guix/maintenance.git/tree/hydra/machine-status.scm#n118>?
>>
>> I didn’t even notice machine-status.scm!  Should we just fold that into
>> offload.scm instead of accepting my simplistic “check-machine-load”
>> procedure?
>
> Sure, I guess it’s just a matter of adding (node-eval node '(uname)) in
> ‘check-machine-load’ and printing that.

Okay, pushed to master with commit dafc3dafe.
I renamed the procedure to “check-machine-status” because it does more
than just print the load.

-- 
Ricardo

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