Changing variable value between tasks

Changing variable value between tasks

[Daniel Lazzari]

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I was wondering if there's a way to override a variable's value specifically for a single task.

My use case for this is that I'm working on a split-image class that splits the rootfs up after install but before image creation, then creates 2 separate images (this helps us keep the rootfs separate from assets and user data). The split works fine, but when it comes time to create an image from the second, non-root file system (which I do in a new task, after do_rootfs), the get_imagecmds(d) call has filled in all of the variables with the values from the rootfs. I need to override variables like IMAGE_ROOTFS, but only for this one task. (I have an ugly work around involving copying the contents of the image_types.bbclass file into my new class and changing variable names, but would prefer not to do it that way)

Thanks,

Dan Lazzari Jr.
Firmware Engineer
dlazzari@leapfrog.com


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Re: Changing variable value between tasks

[Richard Purdie]

On Tue, 2011-11-01 at 18:22 +0000, Daniel Lazzari wrote:
> I was wondering if there’s a way to override a variable’s value
> specifically for a single task.

There is indeed. As an example:

$ cat meta/conf/bitbake.conf | grep PARALLEL
EXTRA_OEMAKE_prepend_task-compile = "${PARALLEL_MAKE} "

which overrides EXTRA_OEMAKE for the compile task.

Cheers,

RIchard