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

[Dirk Bächle]

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