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bug#55898: Services depending on new Shepherd features may fail until re
From: |
Ludovic Courtès |
Subject: |
bug#55898: Services depending on new Shepherd features may fail until reboot |
Date: |
Tue, 30 Aug 2022 15:50:48 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.1 (gnu/linux) |
Maxime Devos <maximedevos@telenet.be> skribis:
> On 30-08-2022 09:33, Ludovic Courtès wrote:
>
>> So are you suggesting replacing:
>>
>> (defined? 'make-inetd-constructor)
>>
>> by something like:
>>
>> (version<? shepherd-version "0.9.0")
>>
>> or is it something different that you have in mind?
>>
>> I’m not sure how this could improve the user experience, unless by
>> “user” you mean the person writing the service?
>
> (defined? '...) does not work in all contexts -- it works on the
> top-level, but not always inside a procedure, as it tests if the thing
> is defined in (current-module), and not whether it is defined in the
> module that calls (defined? '...).
Right, but that’s a bit of a theoretical concern in my view.
Alternatively, one could write:
(module-defined? (resolve-interface '(shepherd service))
'make-inetd-constructor)
Thanks,
Ludo’.