arenaq arenaq - 4 months ago 10
Git Question

How to rebase feature branch from theme branch to development branch?

We have development branch, from which feature branches emerge. Some features are big enough they becomes a topic branches. These topic branches then have more sub-branches that are merged into topic branch and after all topic is finished, then it is merged to development.

Now, I started feature branch from topic branch, but I should have started from development. How can I rebase this?

development
A--B--C--D--E--F--G
\
topic T1----------T2--T3--T4--T5
\ / \
U1--U2--U3 W1--W2--W3
sub-feature U feature W`


Feature W should have started from development branch.

Is there a way to rebase commits W1, W2 and W3 onto a development branch without touching topic branch T?

I know I could checkout development branch and cherry pick each commit, but that would create a new commit with new metadata. I want to keep commit creation date and perhaps author!

Answer

You can make a rebase --onto:

git rebase --committer-date-is-author-date --onto dev T4 W`

That will replay any commit after T4, up to and including W HEAD, onto the dev branch.

                     W1'--W2'--W3' (W)
                    /
A--B--C--D--E--F--G (dev)
       \
topic   T1----------T2--T3--T4--T5
         \         /         
          U1--U2--U3           
         sub-feature U        

See "git rebase without changing commit timestamps", as a workaround to keep a sensible commit date.
But any rebase will always change the metadata.

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