[bug#34295] [PATCH] pull: Specify channels via command-line.

[Ludovic Courtès]

Hi Oleg,

Oleg Pykhalov <address@hidden> skribis:

> * guix/scripts/pull.scm (show-help, %options): Add 'channel'.
> (channel-list): Use this.
> * doc/guix.texi (Invoking guix pull): Document this.

Why not, but I wonder if we really want to do this much on the command
line?  Do you personally find it more convenient than having a
channels.scm file?

What do people think?

> +    (cond (channel-options
> +           (let ((channels (map alist->channel channel-options)))
> +             (if (null? (filter guix-channel? channels))
> +                 (append channels %default-channels)
> +                 channels)))

(null? (filter …)) → (not (any guix-channel? channels))

But note that %DEFAULT-CHANNELS possibly contains more than the 'guix
channel so this test is not quite accurate.

Thanks,
Ludo’.