How to copy commits from one branch to another

Question

I have two features I\'m working on

Shared -- Commits -- A -- B -- C Feat1

Shared -- Commits -- D -- E -- F Feat2

The problem is that to test Feat2 I rea

Answer 1

Merging

You can merge instead of rebase. Since your combo branch is just for testing, you don't have to worry about the history being a bit messier.

That is:

git checkout feat2
git branch -b combo
git merge feat1

Later, when you update feat2:

git checkout combo
git merge feat2

Whenever you make an update to feat1 or feat2, merge that into combo.

The disadvantage is that you'll have to merge all commits in both branches. If there are changes you don't want, you'll have to make a separate commit removing those changes in the combo branch.

Rebasing

You can rebase the additional commits from feat2 onto combo.

Suppose you add some commits onto feat2, then to move these commits to combo:

git rebase --onto combo lastcommittoexcludeonfeat2 feat2

Alternatively, before you make the changes to feat2, add a branch or tag, eg:

git checkout -b lastfeat2rebase
git checkout feat2
git commit ... # more commits here to feat2
git rebase --onto combo lastfeat2rebase feat2

Please note, that once you go with the rebase option, you cannot use the merge option anymore. If you use the merge option, you can later decide to go with the rebase option.