Converting Assembla SVN repositor to GIT

Posted on December 17, 2014

Converting Assembla SVN repositor to GIT

Move a subversion repository, hosted at Assembla to GIT , For this, we expect that you already have a GIT server and repository setup with permission for you to write to it. there is an error to make sure it is 100% clean)

first create 4 directories

/data/code/svndump – to download your subversion repositories into

/data/code/tmpsvn – to load your temporary subversion repository into after downloading

/data/code/tmpgit1 – to create a temp git repository from your svn repo

/data/code/tmpgit2 – to create a bare reformatted git repository from your first git

first open the project / repo in assembla

Click Import / Export > Download Dump

right click on the link and copy link then open command line on a machine with svn and git

cd /data/code wget -O svndump/myrepo.gz “https://linkcopoiedfromassempla” # download the file with quotes (to escape ampersands

svnadmin create tmpsvn/myrepo #create an empt repositorycd

gunzip -c svndump/myrepo.gz | svnadmin load tmpsvn/myrepo

svn log -q file://data/code/tmpsvn/myrepo | awk -F ‘|’ ‘/^r/ {sub(“^ “, “”, $2); sub(” $”, “”, $2); print $2″ = “$2” <“$2″>”}’ | sort -u > users.txt

git svn clone file:///data/code/tmpsvn/myrepo/ –no-metadata -A users.txt –stdlayout tmpgit1/myrepo

cd tmpgit1/myrepo

touch .gitignore #if I dont have any ignore files

git svn show-ignore > .gitignore #if I do have ignore files i svn, this will return an error if there are no ignore files

git add .gitignore

git commit -m ‘Converting Properties from SVN to GIT’ .gitignore

cd /data/code

mkdir tmpgit2/myrepo

cd tmpgit2/myrepo

git init –bare

git symbolic-ref HEAD refs/heads/trunk

Go back to the tmpgit1 repo and push it to the new bare repo and rename the ‘trunk’ to ‘master’

cd ../../tmpgit1/myrepo

git remote add bare /data/code/tmpgit2/myrepo

git config remote.bare.push ‘refs/remotes/*:refs/heads/*’

git push bare

cd /data/code/tmpgit2/myrepo

git branch -m trunk master

Clean up branches and tags (thanks to http://john.albin.net/git/convert-subversion-to-git for most of this)

git for-each-ref –format=’%(refname)’ refs/heads/tags |
cut -d / -f 4 |
while read ref
do
git tag “$ref” “refs/heads/tags/$ref”;
git branch -D “tags/$ref”;
done

Now you have a correctly formatted repo at /data/code/tmpgit2/myrepo you can push it to your final git repository

git remote add origin <your final git repository url >

git push origin master

This may take a bit of time depending on how much code you have. But once it is complete you can browse your repository in stash.

Converting a Subversion Repository(hosted on Assembla) to a GIT repository (hosted on dedicated Linux Host)

Posted on July 29, 2014

Version Control / SVN / GIT

Converting a Subversion Repository(hosted on Assembla) to a GIT repository (hosted on dedicated Linux Host)

We were tasked by our client to move several subversion repositories, hosted at Assembla, to GIT on dedicated internal Linux server. First step was actually installing the Ubuntu Server on their ESXi4 server.

I downloaded the ubutu 14.04 LTS iso
Uploaded it to one of the datastores on the ESXi server
Created a new VM with 4CPU, 8GB RAM and 100 MB disk space.
I loaded the ubuntu 14.04 iso into the VM CD and started the VM.
I installed ubuntu with all of the defaults

Next I installed GIT on the server.

apt-get install git-core
apt-get install git-svn

Next I clone the svn directory into git.

git svn clone <svnurl> –no-metadata -A authors-transform.txt –stdlayout /svn/tempreponame/

Ignore the errors about using –prefix, these just caused me headaches and so by NOT using their recommendations to set prefix=origin/ this will work.
Enter your username and password and each time I get an error which says I need to have ‘usera’ I would add usera to users.txt and run the get svn clone command again

echo “usera = User A <usera@com.com>” >> users.txt

If you receive the error “Unexpected HTTP status 405 ‘Method Not Allowed’ on ‘/svn/wssus.admindash’” this means that you have some protected directories setup in your Assembla. Open the project within Assembla > Settings > Protected branch and remove the directories and run the git svn clone command again

I dont have any ignore files in svn so i fake one

cd /svn/tempreponame/
touch .gitignore
git add .gitignore
git commit -m ‘Converting Properties from SVN to GIT’ .gitignore

Move the git repository to a new/bare repo and create a symbolic link for the ‘trunk’ coming from SVN

cd /git/newreponame
git init –bar
git symbolic-ref HEAD regs/heads/trunk

Go back to the temporary git repo and push it to the new bar repo and rename the ‘trunk’ to ‘master’

cd /svn/tempreponame
git remote add bare /git/newreponame
git config remote.bar.push ‘refs/remotes/*:refs/heads/*’
git push bare
cd /git/newreponame
git branch -m trunk master

Clean up branches and tags (thanks to http://john.albin.net/git/convert-subversion-to-git for most of this)

cd /git/newreponame
git for-each-ref –format=’%(refname)’ refs/heads/tags |
cut -d / -f 4 |
while read ref
do
git tag “$ref” “refs/heads/tags/$ref”;
git branch -D “tags/$ref”;
done

Now you have a new repo at /git/newreponame. check it out to confirm it worked by checking it out and confirming that you have the same log history as your original SVN repo

cd /tmp/
git clone /git/newreponame
find . #this should list all of your files
cd newreponame
git log