IntelliJ IDEA create patch from difference

Question

I have IntelliJ IDEA Ultimate 2018.2.3. I am trying to create a patch from a difference (Compare with...) in IDE, but I can not find a button to do so. I have several commits on branch_A already. I do not need to create a patch from local changes, I need to create the patch from difference with another branch.

In git it simple git diff branch_A branch_B >> diff.patch

Is there any way to achieve it in the IDE?

Answer 1

In IntelliJ IDEA 2020.2 I was able to make it like this:

0. Make sure you have no current local changes beforehand: commit them or put them to stash.
1. VCS -> Git -> Branches -> [select branch to compare with] -> Show Diff with Working Tree
2. [in opened difference view select needed files] -> [right mouse button] -> Get from Branch
3. VCS -> Create Patch from Local Changes...