[yocto] extend image.bbclass (or any bbclass file)

[Erik Botö]

Hi,

On Fri, Jul 12, 2013 at 1:11 PM, Davide Soldan <davide.soldan at kynetics.it>wrote:

> Hi to all,
> I'm trying to move, from outside to inside my recipes, all the changes
> I've done for my custom image.
> For example I changed the image.bbclass adding a function. But this file
> is outside of my recipes that are stored under my git repository. So I'd
> like to move this function from image.bbclass to another bbclass file under
> mi recipes directory.
> I tried to copy image.bbclass under my recipes directory, change its name,
> and references correctly, but duplicates functions gave me some errors:
>
> ERROR: The function normal_groups defined in image.bbclass was already
> declared in image-custom.bbclass. BitBake has a global python function
> namespace so shared functions should be declared in a common include file
> rather than being duplicated, or if the functions are different, please use
> different function names.
> ERROR: The function complementary_globs defined in image.bbclass was
> already declared in image-custom.bbclass. BitBake has a global python
> function namespace so shared functions should be declared in a common
> include file rather than being duplicated, or if the functions are
> different, please use different function names.
> ERROR: The function get_devtable_list defined in image.bbclass was already
> declared in image-custom.bbclass. BitBake has a global python function
> namespace so shared functions should be declared in a common include file
> rather than being duplicated, or if the functions are different, please use
> different function names.
>
> So I think there should be a way to append some code to image.bbclass as I
> can do with recipes and bbappend files...right? How I can do that? Or maybe
> there's another and better way to do that?
> Thanks to all!
>

Can't your image-custom.bbclass inherit image.bbclass and then just add the
function you've added? Instead of replicating all stuff from image.bbclass
in your class.

Cheers,
Erik



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