Refrance link: http://clusterfrak.com/devops/git/git_cvs2git/
CVS is one of the first major Source Code Management tools that was available and widely used. Information about it can be found here. In this tutorial we will be covering the process of converting a CVS repository over to git, a more modern, more powerful SCM.
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Prerequisties: I. CentOS6 or RHEL6
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Create below folder structure
mkdir /{cvs,git} mkdir /tmp/cvs_migration
I. /cvs will be used to hold the rsync or copy(with history) clone of the cvs repository II. /git will be used to hold the converted project(s). III. /tmp/cvs_migration will be used during the conversion, data will be extracted from /cvs, pulled into git_migration and used to create conversion logs, which will be used to populate the final converted project(s) in /git.
- Install Epel: To ensure that we get the latest packages that we need for git, svn, and cvs install the epel repository.
yum install epel-release yum install git #Install git yum install svn #Install SVN yum install rcs cvs #Install rcs and CVS #The Revision Control System (RCS) manages multiple revisions of files #CVS Concurrent version system
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Supporting tool installation yum install openssh-clients rsync wget
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CVS2SVN: The last tool that we need is the cvs2svn. This will be the tool that we use to do the conversion of the cvs repo over to git format.
cd /tmp wget ftp://ftp.pbone.net/mirror/dag.wieers.com/redhat/el6/en/x86_64/dag/RPMS/cvs2svn-2.3.0-1.el6.rf.noarch.rpm rpm -ivh cvs2svn-2.3.0-1.el6.rf.noarch.rpm
Note: cvs2svn rpm installation may fail due to rpmforge-release package Download and install "rpmforge-release" package wget -c http://ftp.tu-chemnitz.de/pub/linux/dag/redhat/el6/en/i386/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.i686.rpm rpm -ivh rpmforge-release-0.5.3-1.el6.rf.i686.rpm All dependent package installed
rpm -ivh cvs2svn-2.3.0-1.el6.rf.noarch.rpm
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This crucial and important step to proceed the migration Login to CVS server and checkout repo export CVSROOT=:pserver:user:password@IP:/cvs/reponame cvs -d :pserver:user:password@IP:/cvs/reponame checkout -r HEAD Modulename Since CVS repo checkout will not bring history with CVSROOT folder missing you will not able to migrate to git
Alternative way is to zip or gz /cvs/reponame/modulename /cvs/reponame/CVSROOT copy zip or gz to remote server scp reoname.zip user@IP:/cvs
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Login to server cvs2svn package installed cd /cvs unzip -r reoname.zip cvs2git --blobfile=/git/git-blob.dat --dumpfile=/git/git-dump.dat --username=Sadashiv --fallback-encoding=ascii reponame >> /tmp/cvs_migration/reponame.log
blobfile: A Git blob (binary large object) is the object type used to store the contents of each file in a repository. The file's SHA-1 hash is computed and stored in the blob object. These endpoints allow you to read and write blob objects to your Git database on GitHub.
NOTICE: This step could take several hours depending on both the size of the repository and the number of commits.
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Init the git repo, and import the converted cvs repo from the conversion created blob files:
cd /git git init --bare reponame.git cd project.git cat /git/git-blob.dat /git/git-dump.dat | git fast-import git gc --prune=now
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Run the CVS migration for a several projects: If you have multiple projects, then you can start the process on all of them at once using the following methodology.
for dir in /cvs/*; do cd /cvs PROJECT=
echo $dir | awk -F'/' {'print $4'}; cvs2git --blobfile=/git/git-blob.dat --dumpfile=/git/git-dump.dat --username=myusername
--fallback-encoding=ascii $dir >> /tmp/cvs_migration/$PROJECT.log; cd /git; git init --bare $PROJECT.git; cd $PROJECT.git; cat /git/git-blob.dat /git/git-dump.dat | git fast-import; git gc --prune=now; done -
Push the repo to Git: The last and final step of the migration is to push the new repository or repositories to Git. Depending on the git server / service that you are using, you will either have to create a new repo for each of your converted cvs repos, or use the service's tools to do a mass import.
Pushing repos manually:
cd /git/project.git git remote add origin http://gitlab.yourcompany.com/namespace/git_repo_name.git git config --global user.email "[email protected]" git config --global user.name "UserName" git add --all git commit -m "Conversion from CVS to Git" git push origin master
Feel free contact for any queries on cvstogit migration Email id: [email protected]