[Compare two branches to find commits in one but not the other] #git

Compare-two-branches-to-find-commits-in-one-but-not-the-other.md

Compare two branches to find commits in one but not the other

git-cherry - Find commits yet to be applied to upstream. Essential for rebase and merging.

Patch workflows

git-cherry is frequently used in patch-based workflows (see gitworkflows(7)) to determine if a series of patches has been applied by the upstream maintainer. In such a workflow you might create and send

a topic branch like this:

$ git checkout -b topic origin/master
# work and create some commits
$ git format-patch origin/master
$ git send-email ... 00*

Later, you can see whether your changes have been applied by saying (still on topic):

$ git fetch  # update your notion of origin/master
$ git cherry -v

Concrete example

In a situation where topic consisted of three commits, and the maintainer applied two of them, the situation might look like:

$ git log --graph --oneline --decorate --boundary origin/master...topic
* 7654321 (origin/master) upstream tip commit
[... snip some other commits ...]
* cccc111 cherry-pick of C
* aaaa111 cherry-pick of A
[... snip a lot more that has happened ...]
| * cccc000 (topic) commit C
| * bbbb000 commit B
| * aaaa000 commit A
|/
o 1234567 branch point

In such cases, git-cherry shows a concise summary of what has yet to be applied:

$ git cherry origin/master topic
- cccc000... commit C
+ bbbb000... commit B
- aaaa000... commit A

Here, we see that the commits A and C (marked with -) can be dropped from your topic branch when you rebase it on top of origin/master, while the commit B (marked with +) still needs to be kept so that it will be sent to be applied to origin/master.