"How-to" request

[Robert Goldman]

P.S. I don't recommend writing your own `OPERATE` methods -- `OPERATE` 
is quite complicated and messing with it could lead you into very deep 
water. I don't believe you should ever need to.

On 19 Mar 2021, at 13:42, Robert Goldman wrote:

> Hi. I'm happy to help you work through this, but so that it doesn't 
> recur as a problem, I'd appreciate it if you would help me fix the 
> manual's discussion of this.
>
> First, have you read this page 
> https://common-lisp.net/project/asdf/asdf.html#Creating-new-operations 
> ?
>
> Please have a look at that -- it's not very long -- and let us know 
> what more needs to be supplied.
>
> I note the discussion of `operation-done-p`. I suspect that is your 
> problem -- your new operation is not aware that it needs to be 
> performed.
>
> This page is substantially redundant with the pages on the object 
> model, and should be beefed up with cross-references, and more 
> inclusion of docstrings...
>
> On 19 Mar 2021, at 12:58, Marco Antoniotti wrote:
>
>> Hi
>>
>> I am trying to create a new ASDF:OPERATION, but I must be missing 
>> something
>> and the manual (or Google) does not seem to help much.
>>
>> How do you create a new operation, which may be quite simple?  Or 
>> better,
>> how do you get PERFORM and/or OPERATE to actually do something for 
>> you.
>>
>> I know I should RTFM, but in this case it is more of a RTFC, which is 
>> far
>> more difficult.
>>
>> I tried the following
>>
>> (defclass my-op (non-propagating-operation) ())
>>
>> (defmethod perform ((o my-op) (s system))
>>    (print 42))
>>
>> (defmethod operate ((o my-op) (s system) &key &allow-other-keys)
>>    (print 666))
>>
>> But then, doing
>>
>> cl-user 42> (operate 'my-op (find-system "somesys") :bar 1024)
>> #<MY-OP >
>> #<ASDF/PLAN:SEQUENTIAL-PLAN 2301B97B>
>>
>> is all I get.
>>
>> Any tutorial or advice?
>>
>> Thanks
>>
>> -- 
>> Marco Antoniotti, Associate Professor         tel. +39 - 02 64 48 79 
>> 01
>> DISCo, Università Milano Bicocca U14 2043 http://dcb.disco.unimib.it
>> Viale Sarca 336
>> I-20126 Milan (MI) ITALY


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