[bug#38612] Pass system and target arguments to gexp->file.

[Ludovic Courtès]

Hello!

Mathieu Othacehe <address@hidden> skribis:

>> In general, in monadic code, we should refer to (current-system) and
>> (current-target-system), not to the SRFI-39 parameters.
>
> Ok!
>
>> By default, ‘gexp->file’ now uses the current system and target, so this
>> change shouldn’t be necessary if you just want to use those.  Am I
>> missing something?
>
> Well turns out that gexp->file takes #f as default target (as
> gexp->script and lower-object).

Oh, right.

> Using %current-target-system as default target argument (as gexp->sexp)
> makes those two patches useless.
>
> Would you have any objection to use %current-target-system as default
> target argument in gexp->file and lower-object?

As written above, it should default to ‘current-target-system’ rather
than ‘%current-target-system’.  Kind of annoying, but heh…

Also, we should probably get rid of the monadic style in (gnu services).
That would simplify things, but there are compatibility considerations…

Thanks,
Ludo’.