hi i need a help for implement below scennario,
i have a main source code master branch named A.
i also have child branches named as B,C,D.
now i have same code on all of my branches there is one part custome code on my child branches(B,C,D).
Now main thing i want to do is when i am changing my source code in master branch A. then it should automatically change in child branch B,C,D. but the custom code on that branches should remain untouched.
Please give me the solution on that and tell me how can i implement this scenario in bitbucket???????
Thanks in advance