[[!comment format=mdwn
 username="tyger"
 ip="80.66.20.180"
 subject="comment 2"
 date="2011-03-01T14:07:50Z"
 content="""
My current workflow looks like this (I'm still experimenting):

### Create backup clone for migration

    git clone original migrate
    cd migrate
    for branch in $(git branch -a | grep remotes/origin | grep -v HEAD); do git checkout --track $branch; done

### Inject git annex initialization at repository base

    git symbolic-ref HEAD refs/heads/newroot
    git rm --cached *.rpm
    git clean -f -d
    git annex init master
    git cherry-pick $(git rev-list --reverse master | head -1)
    git rebase --onto newroot newroot master
    git rebase master mybranch # how to automate this for all branches?
    git branch -d newroot

### Start migration with tree filter

    echo \*.rpm annex.backend=SHA1 > .git/info/attributes
    MYWORKDIR=$(pwd) git filter-branch --tree-filter ' \
        if [ ! -d .git-annex ]; then \
            mkdir .git-annex; \
            cp ${MYWORKDIR}/.git-annex/uuid.log .git-annex/; \
            cp ${MYWORKDIR}/.gitattributes .; \
        fi
        for rpm in $(git ls-files | grep \"\.rpm$\"); do \
            echo; \
            git annex add $rpm; \
            annexdest=$(readlink $rpm); \
            if [ -e .git-annex/$(basename $annexdest).log ]; then \
                echo \"FOUND $(basename $annexdest).log\"; \
            else \
                echo \"COPY $(basename $annexdest).log\"; \
                cp ${MYWORKDIR}/.git-annex/$(basename $annexdest).log .git-annex/; \
            fi; \
            ln -sf ${annexdest#../../} $rpm; \
        done; \
        git reset HEAD .git-rewrite; \
        : \
        ' -- $(git branch | cut -c 3-)
    rm -rf .temp
    git reset --hard


There are still some drawbacks:

* git history shows that git annex log files are modified with each checkin
* branches have to be rebased manually before starting migration


"""]]