[Scons-dev] Calling PseudoBuilder from an emitter function from a Builder with OverrideEnvironment looses overrides

[andreas.ames at de.transport.bombardier.com]

Hi Dirk,

scons-dev-bounces at scons.org schrieb am 21.10.2013 12:40:27:


> as a first thought on this: I wouldn't expect this to work at all, 

> because it shouldn't be necessary to call any kind of Builder from an 

Emitter.

> Can you possibly tell us a bit more about where this setup comes 

> from, or why you need to do it like this?


it's well possible that I'm abusing the PseudoBuilder concept here.  We've 
got a convention here that our own environment variables are all prefixed 
with a common short string to avoid clashes with names predefined by 
scons.  So we have created a PseudoBuilder which takes the unadorned 
variable name and adds the common prefix to look up the variable in the 
environment.  Thus I used this PseudoBuilder to lookup a variable within 
the emitter because I didn't know about the "No Builders in emitters" 
rule.

The workaround was trivial and I will transform my lookup PseudoBuilder 
into a normal Python function which seems more adequate (and efficient) 
anyway.


Thanks for the clarification,

aa
  
Please consider the environment before you print / Merci de penser à 
l'environnement avant d'imprimer / Bitte denken Sie an die Umwelt bevor 
Sie drucken 

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