[OE-core] Get patch of all manual changes done in sources.

[Kucharczyk, Bartlomiej (Nokia - PL/Wroclaw)]

Hello!

Is there any automated way to get diff of all manual changes done in recipe sources?

Use case is:
1. bitbake something -c devshell
2. # manually modify sources #
3. bitbake image
4. bitbake something2 -c devshell
5. # manually modify sources #
6. bitbake image
...
n. bitbake image

And now I would like to automatically generate patch from changes in step #2, #5, and next. Is there any way in oe core to achieve such thing?
 
And if needs to be implemented, do you have any suggestions how to start? (e.g. doing another task, create a bbclass, or? )

Thanks in advance!
Bartek