* Including additional modules in dmd services
@ 2015-11-20 3:47 David Thompson
2015-11-20 14:03 ` Ludovic Courtès
2015-11-25 11:04 ` Ludovic Courtès
0 siblings, 2 replies; 3+ messages in thread
From: David Thompson @ 2015-11-20 3:47 UTC (permalink / raw)
To: guix-devel
Hello hackers,
I am finally getting up to speed on the new service API, and I believe
I've run into a limitation of dmd services. I wanted to use 'match'
from (ice-9 match) in the "start" action for a dmd service, like so:
(dmd-service
(provision '(foo))
(documentation "Foo service.")
(requirement '(user-processes))
(start #~(begin
(use-modules (ice-9 match))
(match #$something
(foo ...))))
(stop #~(const #t)))
The problem is that, while the module is successfully imported, the
'match' form is not treated as syntax, and thus the service fails with
an unbound variable 'foo' exception. I hacked 'dmd-configuration-file'
in gnu/services/dmd.scm to import (ice-9 match) in the top-most
'use-modules' form of the 'config' gexp and then my service worked as
intended.
Am I just doing it wrong? If it's a real limitation, what would be the
best way to specify the additional modules needed? I looked around at
the various dmd services and couldn't find any other examples of needing
macros from another module. I would love to know how to resolve this so
that I can continue my quest of managing user SSH keys with a dmd
service.
Thanks,
--
David Thompson
GPG Key: 0FF1D807
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Including additional modules in dmd services
2015-11-20 3:47 Including additional modules in dmd services David Thompson
@ 2015-11-20 14:03 ` Ludovic Courtès
2015-11-25 11:04 ` Ludovic Courtès
1 sibling, 0 replies; 3+ messages in thread
From: Ludovic Courtès @ 2015-11-20 14:03 UTC (permalink / raw)
To: David Thompson; +Cc: guix-devel
David Thompson <dthompson2@worcester.edu> skribis:
> Am I just doing it wrong? If it's a real limitation, what would be the
> best way to specify the additional modules needed? I looked around at
> the various dmd services and couldn't find any other examples of needing
> macros from another module. I would love to know how to resolve this so
> that I can continue my quest of managing user SSH keys with a dmd
> service.
No you’re not doing it wrong! It just happens that the current list of
modules visible to dmd code is hard-coded in ‘dmd-configuration-file’,
in (gnu services dmd).
Short-term workaround is to add (ice-9 match) there.
Longer-term, I’d like to have each service in its own file, with its own
set of modules. ‘dmd-service’ would presumably have a new ‘modules’
field for that.
I’ll look into it.
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Including additional modules in dmd services
2015-11-20 3:47 Including additional modules in dmd services David Thompson
2015-11-20 14:03 ` Ludovic Courtès
@ 2015-11-25 11:04 ` Ludovic Courtès
1 sibling, 0 replies; 3+ messages in thread
From: Ludovic Courtès @ 2015-11-25 11:04 UTC (permalink / raw)
To: David Thompson; +Cc: guix-devel
With commit fae685b, <dmd-service> has a ‘modules’ and an
‘imported-modules’ field, following the same pattern used for <origin>.
Let me know what you think!
Ludo’.
^ permalink raw reply [flat|nested] 3+ messages in thread
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