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Flatten history in GIT

+1 vote
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I have a (public) "feature" branch that has been kept up-to-date with "master" by regularly merging master back into it. I would now like to get all the changes from feature but not any of the commits. Basically, I want to replay all of feature's commits without creating those commits.

I thought something like

git cherry-pick -n abcd^..feature

should do the trick (while on master, where abcd is the SHA-1 of the commit where feature was created) but I get conflicts.

First, why the conflicts? I have done all the merges so cherry-pick should simply be able to replay them? Second, what is the correct way of doing this?

posted Jul 30, 2013 by Amit Parthsarthi

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2 Answers

+1 vote
 
Best answer

Wouldn't git merge --squash do what you're looking for? It seems like the only way to not get conflicts trying to cherry pick is if you never had any conflicts while you were merging master into your feature branch. "Evil" merges, where you actually have to change code, even if it's just to resolve conflicts, don't tend to replay correctly.

It seems like this should do it:

% git checkout master

Switched to branch 'master'

% git merge --squash feature

Squash commit -- not updating HEAD Automatic merge went well; stopped before committing as requested

% git commit

git merge --squash will just apply the changes without creating a commit. You can then make any final changes you want to and write your commit message for the feature.

answer Jul 30, 2013 by Majula Joshi
0 votes

Try
% git cherry-pick -n --no-merges --right-only --topo-order --cherry-pick abcd^..feature

answer Jul 30, 2013 by Deepankar Dubey
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