[Scons-users] Dependencie with Sconscripts and builder's environment

[Albert Arquer]

Python value node? Please could you elaborate on how that would work?

Isn't there any other way this can be done? Could I redefine the get_presig
method for the builder? Or maybe use different kinds of builers? (As you
mentioned mine is a python Action, maybe there are others?)

We thought we could dump the whole env into a file when registering a
target and then pass that file as a builder source, but we are doing this
for code redability and evaluation speed, and I am not sure if that would
accomplish neither...

El dimarts, 11 d’octubre de 2016, Dirk Bächle <tshortik at gmx.de> va escriure:

> Hi Albert,
>
> and thanks for the intriguing example. :)
>
> On 11.10.2016 18:22, Albert Arquer wrote:
>
>> Hi Bill,
>>
>> yes sure, I though it would be much harder to do that because I thought
>> it would have to do with some weird feature we are using,
>> however I was able to replicate the issue with a very tiny peace of code:
>>
>> ...
>>
>>
>> So is this a known limitation? Are we doing something wrong?
>>
>>
> You're doing nothing wrong, it's in fact a limitation of the core sources.
> When using a Python method as an Action, as you do in your example, SCons
> will use the body of the function (its contents as retrieved via
> FunctionAction::get_presig, see src/engine/SCons/Action.py) to trigger an
> update...and it doesn't change, unfortunately. :(
>
> A workaround might be to create a Python value node from the $COMMENT
> variable, and set a direct dependency to the final target. Somewhat
> cumbersome, I know...
>
> Best regards,
>
> Dirk
>
>
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