git分支从B合并到A但是在B分支有1和2的代码怎么去掉2的代码只合并1的代码从B到A上？

Question

代码有 B分支和A分支
现在要把B分支合并到A分支上
B分支有开发1的代码和开发2的代码。
开发1和开发2的提交代码历史：1->2->1->1
问题是怎么去掉开发2的代码只把开发1的代码合并到A分支上？

求大神指点~~

Answer 1

It seems that you can only create a new branch from branch A? After development is completed, go directly to branch A instead of going through branch B and then to branch A

Answer 2

git rebase B A

Answer 3

Revert 2 commits on branch B, and then do a rebase and merge