A little bit more about git cherry-pick

Posted on May 16, 2016
Tags git

In one of the previous posts I talked about a way to copy a bunch of commits from one git branch to another one. Today had to copy commits again, but for a different reason.

Several days ago I started a new project in a new repository. I made several commits on my master branch when I realized that I needed to create a pull request to perform a code review. What I had:

A -- B -- C -- D -- E                                          master

What I’d like to have:

X                                                              master
 \
  A -- B -- C -- D -- E                                        feature

Since it was a new repository I didn’t care about the commit history. First of all I created a new detached branch to have a clear history:

$ git checkout --orphain temp
$ git rm -rf .
$ vim .gitignore
$ git add .gitignore
$ git commit -m "Initial commit"

Now my history looks like this:

A -- B -- C -- D -- E                                          master

                        X                                      temp

So there were two histories, not related to each other. The next step was to create a feature branch and copy the commits there.

$ git checkout -b feature
$ git rev-list --reverse master | git cherry-pick --stdin
$ git push -u origin feature

Because was an empty branch, there were no conflicts. Another difference between this command and the command from the previous post, is that I didn’t use a commit range, but a whole branch as an argument for the rev-list command. I was almost there:

A -- B -- C -- D -- E                                          master

                        X                                      temp
                         \
                          A' -- B' -- C' -- D' -- E'           feature

The final step was to set the master branch to the commit X and remove the temp branch.

$ git checkout master
$ git reset --hard temp
$ git branch -d temp
$ git push -f origin master

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