[Scons-users] Generating a source file that changes

[Carsten Fuchs]

Hi Francis,

thank you very much for your reply!

Am 30.10.2012 02:29, schrieb Francis Bolduc:

> def ValueFileBuilder(env, target, source):

>     '''

>        Ensure that target file contains source value.

>        If source value changes, target file is rebuilt.

>        Use this to specify dependency between source value and target file.

>     '''

>     f = file(str(target[0]), 'wb')

>     f.write(source[0].get_contents())

>     f.close()

>

> env['BUILDERS']['ValueFile'] = env.Builder(action = env.Action(ValueFileBuilder))

>

> Then you use it thus:

>

> app = env.Program('Ca3DE/Cafu',

>      Glob("Ca3DE/*.cpp") + env.ValueFile('Ca3DE/auto-gen/AppCafu_GenList.cpp', generateCode))



I notice that you use source[0].get_contents() in the builder... but it makes me wonder what 
generateCode() is supposed to return:

Should it write the contents to another temporary/intermediate file and return its filename,
or should it return the contents *as* the filename??

Best regards,
Carsten



-- 
    Cafu - the open-source Game and Graphics Engine
for multiplayer, cross-platform, real-time 3D Action
           Learn more at http://www.cafu.de