Import SVN project into gerrit?

[Gareth Huang]

Guys

Now I have a SVN project and I wanna switch it into gerrit now. Do we have a guide for this?

[Luca Milanesio]

Hi Gareth,

just convert your SVN repo to Git (see [1]) and copy the bare repo into Gerrit's /git directory.

Luca.

[1] https://git-scm.com/book/en/v2/Git-and-Other-Systems-Migrating-to-Git

On 31 Dec 2015, at 08:59, Gareth Huang <academi...@gmail.com> wrote:

Guys

Now I have a SVN project and I wanna switch it into gerrit now. Do we have a guide for this?

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[Gareth]

Thanks Luca,

I didn't make my case clear.

Now I have a big SVN project and I want Gerrit to manage it or to
replace. So I hope it is possible to 'upload' to Gerrit, to git-svn
and then to SVN.

--
Gareth (Kun Huang)

Cloud Computing, OpenStack, Distributed Storage, Fitness, Basketball
OpenStack contributor, kun_huang@freenode
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[luca.mi...@gmail.com]

Hi Gareth, Gerrit is build on top of JGit and does not support SVN.

If you wish to use Gerrit you have to migrate to Git first.

Luca

Sent from my iPhone

[philipp...@gmail.com]

We have recently migrated several projects in our organization and have automated most of the work.  

I've included some example commands here.

Our steps were based on http://john.albin.net/git/convert-subversion-to-git and https://git-scm.com/book/en/v2/Git-and-Other-Systems-Migrating-to-Git.

We also used a tool called "BFG" to remove large binary files from the project history before uploading to Gerrit (see https://rtyley.github.io/bfg-repo-cleaner/)

The steps we follow are:

0. cleanup your svn tree, in svn. svn rm any big files that people don't need.

1. generate the list of committers using something like

svn log | awk -F '|' '/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2"@ingrooves.com>"}' | sort -u > authors-transform.txt

2. Use git-svn to convert your svn history into a git repository. The exact arguments will depend on your branch layout:

git svn clone --no-minimize-url -A ../authors-transform.txt \

    -r 88160:HEAD http://svn.INgrooves.com/svn/INgrooves/Apollo/UI \

    --prefix=origin/ --trunk=trunk --branches=branches \

    ./${GIT_SVN_REPO_NAME} 

3. Map the cloned repo into a bare git repo that will "look" like your final repo, and include the branches you want to keep:

rm -rf ./${IMPORTED_GIT_REPO_NAME}

git init --bare ${IMPORTED_GIT_REPO_NAME}

cd ${GIT_SVN_REPO_NAME}

git remote remove local-git

git remote add local-git ../${IMPORTED_GIT_REPO_NAME}

git config remote.local-git.push 'refs/remotes/origin/*:refs/heads/*'

git push local-git master

git push local-git remotes/origin/2.0

4. We use BFG to prune away deleted binary files from the repository's history. Note that this will change your repo history. This is OK for us because history is for people, not builds, and we keep our old svn repository. The size reductions are dramatic.

java -jar ../bfg/bfg.jar --strip-blobs-bigger-than 50M ${IMPORTED_GIT_REPO_NAME}

java -jar ../bfg/bfg.jar --delete-files '*.{aif,aiff,dll,epub,exe,jar,obj,mobi,mov,mpeg,mp3,mp4,nupkg,pdb,wav,wixpdb,wma,zip}' ${IMPORTED_GIT_REPO_NAME}

cd ${IMPORTED_GIT_REPO_NAME}

git reflog expire --expire=now --all && git gc --prune=now --aggressive

git repack -a -d -f --depth=250 --window=250

5. Upload the bare repository directly to the gerrit data directory. Restart the gerrit server or flush its caches.