Yocto devtool

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I have got used to create patch and bbappend files manually, now I’m switching to use devtool - To be honest it’s quite easy to use.

Export source code to external patch

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devtool modify <recipe_name> <dst_path_to_export>

Then we can do changes based on exported source code.

Upgrade changes to bbappend

When changes are verified and we need to add changes into bbapned file as a patch, just use git to commit changes, then:

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devtool update-recipe <recipe_name> -m patch -a <dst_layer_path_to_generate_bbapned>

Exit dev mode

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devtool reset <recipe_name>

Note: devtool will not delete exported source code.