2

I have an existing git repository with a long history. For business reasons i have to mirror that repository to a svn server. I tried several ways but always failed so far.

RED SOFT ADAIR
  • 12,032
  • 10
  • 54
  • 92

2 Answers2

2

I hard time do it some time ago, so I've collected some steps from different sources to do it.This procedure will keep your full git history. Before starting make sure to have a backup copy of your repository.

The first thing to do is create an empty svn repository. When you're done with it be sure to have git-svn installed and edit yout .git/config to track your newly created svn repos:

[svn-remote "svn"]
url = https://your.svn.repo
fetch = :refs/remotes/git-svn

Now you can fetch your svn repo:

git svn fetch

You should see the remote branch following your svn repo, you can check with:

git branch -a

Now get the hash of your root commit and of the svn branch:

git rev-list --parents master | grep '^.\{40\}$'
git rev-parse remotes/git-svn

Create the graft:

echo <hash-of-root-commit> <hash-of-svn-branch-commit> >> .git/info/grafts

Now if you use a graphical wrapper for git (I use tig) you should see that your root commit descends from the svn-branch.

At this point you have to propagate the graft making it permanent:

git filter-branch -- remotes/git-svn --all

Now we don't need it anymore so we can delete it

rm .git/info/grafts

Check with your graphical git wrapper that the svn-branch is the master ancestor.

Now you're almost done, rebase your history on top of trunk:

git svn rebase

Now your ready to commit to your svn repo using

git svn dcommit

I've created this procedure merging infos I've found here and here, so thanks to the respective authors. I've modified the first part because the proposed procedure didn't worked for me.

Community
  • 1
  • 1
Atropo
  • 12,231
  • 6
  • 49
  • 62
2

Please note that git-svn approach leads to partial history loss. Consider using SubGit instead, it's able to convert Git repository into SVN keeping the history of all branches.

Below you can find an example of using SubGit in a local mode, i.e. when both Subversion and Git repositories reside on the same host:

$ subgit configure SVN_REPO
# adjust SVN_REPO/conf/subgit.conf, so git.default.repository points to GIT_REPO
# adjust SVN_REPO/conf/authors.txt to map SVN usernames to Git identities
$ subgit install SVN_REPO
$ subgit uninstall --purge SVN_REPO

Once we've converted Linux kernel Git repository to SVN this way. Hope that helps.

vadishev
  • 2,979
  • 20
  • 28