Instructions on how to port Dukto from SVN to Git

instructions.txt

First create an author-map file for translating svn user names to Git user names in history:

$ cat author-map
em.colombo = Emanuele Colombo <em.colombo@gmail.com>
em.colombo@gmail.com = Emanuele Colombo <em.colombo@gmail.com>
Vittorio.Curcio = Vittorio Curcio <Vittorio.Curcio@dummy.example.com>
xxdede = xxdede <xxdede@dummy.example.com>
(no author) = no author <no-author@dummy.example.com>

Now, do a git svn clone:

$ git svn clone -s --prefix=mirror/ http://dukto.googlecode.com/svn/ --no-metadata -A author-map dukto

This will take a little while. 

After we're done, we still want to clean up a little. For example, convert SVN tags to proper Git tags. Run this script:


git for-each-ref --format="%(refname)" refs/remotes/mirror/tags/ |
while read tag; do
    GIT_COMMITTER_DATE="$(git log -1 --pretty=format:"%ad" "$tag")" \
    GIT_COMMITTER_EMAIL="$(git log -1 --pretty=format:"%ce" "$tag")" \
    GIT_COMMITTER_NAME="$(git log -1 --pretty=format:"%cn" "$tag")" \
    git tag -m "$(git for-each-ref --format="%(contents)" "$tag")" \
        ${tag#refs/remotes/mirror/tags/} "$tag"
done

and delete all the branches that have now been converted to tags:

$ git for-each-ref --format='%(refname:short)' 'refs/remotes/mirror/tags/'|xargs git branch -rD

And delete some dummy branches that we won't need:

$ git branch -Dr mirror/resources@105
$ git branch -Dr mirror/trunk # local branch master is the same as trunk


And delete some tags that we don't want:

$ git tag -d R1@16 
$ git tag -d R2@38 
$ git tag -d R3.1@100
$ git tag -d R3@93
$ git tag -d R4@103

Now, create a repository called "dukto" on GitHub. Leave it empty (don't add any README or something like that).

Add the GitHub repo as a remote:

$ cd dukto
$ git remote add github git@github.com:username/dukto.git

Push all the SVN branches and tags to the remote:

$ git push github master
$ git push github 'refs/remotes/mirror/*:refs/heads/*'
$ git push github --tags

Now you can clone a fresh nice pure Git repo and get to work!

$ git clone git@github.com:username/dukto.git
$ cd dukto
$ # do changes
$ git commit -am "Changes"
$ git push