1. yocto@lists.yoctoproject.org

Re: What is the recommended method to patch a recipe?

Alexander Kanavin
 

On Mon, 13 Apr 2020 at 12:46, Nicolas Dechesne <nicolas.dechesne@...> wrote:
A good rule of thumb is to never modify a metadata that is not yours. That applies to everything:
* if you need to modify a bb file from a 3rd party library, create a bbappend file in your layer
* if you need to modify a bbappend from a 3rd party, then create another bbappend in your layer

And by 3rd party i mean any layer/tree which is not yours (OE-core, or any other layer your are using).

I beg to differ! Bbappends are making it difficult to reason about what the recipe with all its appends is doing (because they destroy spatial locality and aren't easily visible), and I would actually discourage using them if the modification can go to the original recipe.

Is it fixing a problem? Is it adding a build option absent from the original recipe? Then please take the trouble to submit the change to the owners of the recipe.

Similarly, if a bbappend is re-setting the component version to something else (yes, people do that despite my best efforts to prohibit the practice), then a much cleaner approach is to actually make a fully copy of the recipe, or go and fix the original.

Alex
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