[Scons-users] Overriding Object to force global dependency

[Kyle J Strand]

The env.AddMethod() method isn't actually what you want; try this:

env['BUILDERS']['Object'] = Object

I tested this by printing env.Dump('BUILDERS') before and after this 
command, cloning the environment to env2, and printing 
env2.Dump('BUILDERS'), and looks like it works exactly as intended.

-----------------------------------------------------------------------
Kyle Strand, Software Intern
Beckman Coulter, Inc., Life Sciences Division
4862 Innovation Drive, Fort Collins, Colorado, 80525
(970) 204-7036

scons-users-bounces at scons.org wrote on 06/27/2012 11:04:27 AM:


> Greg Ward <greg at gerg.ca> 

> Sent by: scons-users-bounces at scons.org

> 

> 06/27/2012 11:04 AM

> 

> Please respond to

> SCons users mailing list <scons-users at scons.org>

> 

> To

> 

> scons-users at scons.org

> 

> cc

> 

> Subject

> 

> [Scons-users] Overriding Object to force global dependency

> 

> Hi all --

> 

> I want to force every single *.o file in my build to artificially

> depend on something. (We have a homebrew tool that downloads and

> unpacks specific versions of all third-party dependencies -- GCC,

> C/C++ libraries, Java libraries, etc. This tool must run first, and

> everything else should depend on its output.)

> 

> The obvious thing to do is override env.Object(), but I'm not sure how

> to do that. I tried it with env.AddMethod, and that only half worked.

> Here's my override:

> 

>   _Object = env.Object

>   def Object(env, *args, **kwargs):

>       global _Object, dummy

>       print('Object override: args=%s' % map(str, args))

>       obj = _Object(*args, **kwargs)

>       env.Depends(obj, dummy)

>       return obj

> 

>   env.AddMethod(Object, 'Object')

> 

> ('dummy' is the output of that homebrew dependency tool.)

> 

> This works as long as I only ever use one env object. But as soon as I

> do

> 

>   env = env.Clone()

> 

> it stops working. The clone has the original Object() method, not

> mine. ;-(

> 

> Is there a good way to do this?

> 

> Thanks --

> 

>         Greg

> _______________________________________________

> Scons-users mailing list

> Scons-users at scons.org

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