[Scons-users] Qt4 tool: adding variant dir to include path of source dir

[Kyle J Strand]

I'm trying to use the Qt4 tool to take interface files (*.ui) and build 
the corresponding header files into a variant directory, rather than the 
original source directory. These header files are then included by other 
source files in the original source directory. Therefore I need to include 
the variant dir in the include path for the source directory. Does anyone 
know what the easiest and most SCons-ish way to do this would be? I don't 
see any support for such an option in either the Qt4 tool itself or the 
documentation for VariantDir(). Almost as useful would be functions to 
just get the source directory and the variant directory that are currently 
being used, which I could then feed into another set of functions to 
generate the relative path from one to the other and then explicitly add 
that path to the include path for the source directory.

If possible, I'd like to only modify the include path when I actually call 
the Uic4() builder from the Qt4 tool, because I have a whole tree of 
variant directories for intermediate build files (*.obj, etc) that mirrors 
the original directory structure of my source tree, and I don't want to be 
forced to have the entire intermediate file tree in the include path for 
the entire source tree.

To clarify exactly what it is I want, here's some pseudocode for the way 
I'll try to implement it if no such option is available. This code would 
go inside of a method that would be used whenever I want to call Uic4(). 
VariantDir() will already have been called at this point.

current_dir = (os.getcwd())
# I've observed that cwd is actually inconsistent; sometimes it's in the 
source tree,
# other times it's in the intermediate build tree. So I need to check 
which is the case.
if current_dir is in the intermediate tree:
    current_build_path = current_dir
    current_source_path = GetCorrespondingSourceDir(current_dir)
    # As far as I can tell, the only way to implement 
GetCorrespondingSourceDir (above)
    # would be to directly parse and manipulate the string version of 
current_dir using
    # functions from os.path. This shouldn't be terribly difficult, but it 
would be a pain.
else:
    current_source_path = current_dir
    current_build_path = GetCorrespondingBuildDir(current_dir)
    # Like GetCorrespondingSourceDir above, I'd have to implement
    # GetCorrespondingBuildDir using os.path.
relative_build_path = relative path from current_source_path to 
_current_build_path
# I already have a function to get the relative path needed above, so this 
part is not a problem.
thisPackage.AddIncludePath(relative_build_path)   # This function is also 
already implemented.
interface_headers = env.Uic4(interface_list)



Thanks,
KJS

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