How to synchronize a GIT repository with SVN?

Question

I am planning to make a fork of an open-source project, but I want to switch to GIT. The project is using SVN, but there is no TRAC available, so I can\'t just download chan

Answer 1

If you have an access to your SVN repository you may install SubGit into it. Just run

$ subgit install path/to/your/svn/repostiory

All the synchronization will be performed automatically (triggered by SVN and Git hooks). In this case not only master/trunk but all the branches will be in sync (though you can configure its behaviour).

Disclaimer: I'm one of the developers of this product.

Answer 2

You can synchronize SVN with Git using git-svn(1).

If you have existing Git repository, and want to bind with another SVN repository, you can try some kind of voodoo, see http://blog.experimentalworks.net/2009/07/git-voodoo/.

The blog shows how to convert existing non-git-svn Git repository, to git-svn-enabled Git repository with a new created remote SVN repository. You can modify the voodoo workflow a little to import an existing SVN repository to you Git repository:

1. Import the trunk as a parallel branch into your existing Git repository

   cd GIT-REPO
   git svn clone --stdlayout SVN-URL .
   

2. Setup the graft:

   TRUNK_HEAD=`git rev-parse trunk`
   MASTER_INIT=`git rev-list --reverse master | head -1`
   echo $MASTER_INIT $TRUNK_HEAD >.git/info/grafts
   

3. Find out the range in master branch to be appended to trunk, for example, only the changes start from tag v2.0 will be appended to trunk.

4. Rebase trunk

   git checkout master
   git rebase --onto trunk v2.0 master
   

5. Commit to trunk

   git svn dcommit
   

A usage hint: by using grafts with git-svn, you should ensure you won't dcommit empty commits. Otherwise, dcommit will fail. To filter away the empty commits, try

git filter-branch --prune-empty

before the first time dcommit.