Bitbake: proper way to "patch" a function from a recipe?

Question

In Yocto build, I need to patch a Python function do_special_task() in a recipe under meta/recipes-devtools. Naturally, I'm not touching the original .bb file, but creating own .bbappend in our own layer.

To do this, I copy all the function into .bbappend. The diff is just one line, but I have to copy do_special_task() in its whole and then change the only line.

Is there a way to better factor the change out? Something like "patch of the bb file"?

score 3 · Accepted Answer · answered Feb 06 '18 at 13:58

3

No, you need to copy/paste the function into a bbappend.

Or, work with whoever wrote the recipe so do_special_task handles both of your needs, possible with a variable to control what it does.

answered Feb 06 '18 at 13:58

Ross Burton

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(note that there is another way but is far too fragile to be suggested) – Ross Burton Feb 06 '18 at 13:59
Then I'm curious of the fragile way too. If not for production, then at least for learning. – Konstantin Shemyak Feb 06 '18 at 14:09
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Use the _remove and _append overrides to edit the source of the function. It's horrible and hard and prone to break. – Ross Burton Feb 07 '18 at 16:26

Bitbake: proper way to "patch" a function from a recipe?

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