Re: How to replace master branch of a repo with that of another totally unrelated repo?

From: Ramkumar Ramachandra <artagnon@gmail.com>
Date: Aug 6, 2010, 08:07 UTC
Message-ID: <20100806080720.GB31901@kytes>
In-Reply-To: <AANLkTiksJd-VfiP2Wzz-FsZoJk8djWyuxgweQpy6WaPB@mail.gmail.com>

Hi,

PCMan writes:

Show 15 quoted lines

> I want to rewrite a program totally from scratch rather than branching
> from current one.
> So I created a new repo for it and do the development there.
> Now it's finished and I want to replace the old program with it.
> Is it possible to replace the master branch of the old repo with the
> code in this new repo?
> I want to move the old code to a separate branch for backup, and
> replace the master branch with the master branch of the new repo.
> Since git rm -r * than git add all new files will lost history of new
> repo, it's not an option.
> The old repo is a public online repo used by multiple users. So just
> renaming the repo won't work since the users who pull code from the
> old repo will get troubles.
> What's the best strategy for smooth migration in this case?
> I'm not able to find the answer on Google.

In your old repository: $ git checkout master # Switch to branch master $ git checkout -b backup # Create a branch backup of master $ git remote add new <new_repository_url> # "new" is the name of the remote $ git fetch new # Fetch all the objects from the remote "new" $ git checkout master # Get ready to rewrite master $ git reset --hard new/master # Use `reset --hard` with extreme caution $ git checkout backup # Your backup is safe here $ # Done!

-- Ram