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Moving SVN repositories to Github

There is now an easier solution to import an existing package, see https://import.github.com/new

Instructions made for svn.plone.org/collective.

You have two options, calling directly git svn clone or use svn2git

Here is an example session of moving collective.logbook to GitHub

Prerequisites

install svn2git (https://github.com/nirvdrum/svn2git):

  • on OSX Mountain Lion / Macports:

    sudo port install git-core +svn
sudo port install rb-rubygems
sudo gem install svn2git

  • On Debian / Ubuntu:

    sudo apt-get install git-core git-svn ruby rubygems
sudo gem install svn2git

  • Generic: install svn2git as a Ruby gem:

    sudo gem install svn2git / su -c 'gem install svn2git'

Make a proper git-svn fork

You can automate this step using plone-collective-svn2git.sh in this repository.

  • Set your product name to be available in shell :

    export PRODUCTNAME="collective.logbook"

  • Working directory:

    mkdir -p ${PRODUCTNAME}/${PRODUCTNAME} && cd ${PRODUCTNAME}/${PRODUCTNAME}
  • Create repository on Github in your dashboard. Choose "collective" as the owner.

  • Grab the log from your addon and note the start and env revisions here we have : start:78034 / end:246764:

    svn log -q https://svn.plone.org/svn/collective/${PRODUCTNAME} > ../LOG

  • Optional but recommended: Remap authors commiters to FullName <email>

    • Take care of remapping to github accounts fullname/email pairs if they exists:

    cat ../LOG | awk -F ' sort -u > ../authors-transform.txt cat ../authors-transform.txt ... maurits = maurits <maurits> ...

    • Edit the authors file:

    $ED ../authors-transform.txt ... maurits = Maurits van Rees <m.van.rees@zestsoftware.nl> ...

  • Run svn2git Note: the following takes 30+ minutes to complete on fast internet connection, as it walks through every of 150k+ commits in Collective SVN

    • To not grab all collective revisions, we will compute the last and first revisions and give them to svn2git with:

    export REVS="$(tail -n2 ../LOGawk '{print $1}'tail -n1sed "s/r//")"

    • Verify:

    echo $REVS

    • If you have the authors file:

    svn2git --authors ../authors-transform.txt --revision $REVS -v https://svn.plone.org/svn/collective/${PRODUCTNAME}

    • If you do not have the authors file:

    svn2git --revision $REVS -v https://svn.plone.org/svn/collective/${PRODUCTNAME}

Push code to github / Backup the old one

  • After migrating, push the git-svn checkout to github:

    git remote add origin git@github.com:collective/${PRODUCTNAME}.git
git push -u --all
git push --tags

  • Move old trunk:

    cd ..
svn mv -m "Moved to github" https://svn.plone.org/svn/collective/${PRODUCTNAME}/trunk https://svn.plone.org/svn/collective/${PRODUCTNAME}/trunk.old
svn mkdir -m "Moved to github" https://svn.plone.org/svn/collective/${PRODUCTNAME}/trunk
svn co https://svn.plone.org/svn/collective/${PRODUCTNAME}/trunk/ ${PRODUCTNAME}.old
cd ${PRODUCTNAME}.old
echo "Repo moved to https://github.com/collective/${PRODUCTNAME}" > MOVED-TO-GITHUB.txt
svn add MOVED-TO-GITHUB.txt
svn commit -m "Added Github moved notice"