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Git for Committers

Revision as of 17:07, 10 March 2009 by Jamesblackburn+eclipse.gmail.com (Talk | contribs) (Setting up git: tidy)


  • bug 257706 Host a git repository on Eclipse Foundation servers, support git as the repository of Eclipse projects
    • bug 257706#c63 Mike M. on potential problems with git at the Foundation
  • bug 249745 Eclipse Repository Best Practices
  • EGit/Proposal

Setting up git


Has someone already imported the repository for you? If so clone or fork theirs! (See Known Git Repositories for Eclipse Projects.)

Cloning a repository locally is as easy as:

git clone <repo_url> my_checkout_dir_name

e.g. git clone git://github.com/jamesblackburn/eclipse-core-resources-tests.git org.eclipse.core.tests.resources

Importing a repo

The process of creating a repository is the same whether you're an existing committer or not.

Tracking only your own changes

If you're only interested in your own changes and/or don't care about importing existing commit history from a legacy repository, you can just tell git to start tracking changes in a specific directory tree. Turn any directory into a versioned repository with the sequence:

git init
git add .
git commit

Git will then start tracking changes from this point onwards.

Importing from CVS

git cvsimport -v -C eclipse-core-resources -d :pserver:anonymous@dev.eclipse.org:/cvsroot/eclipse -r cvs org.eclipse.core.resources

This command creates a new git repository importing all the history, in this case, from the org.eclipse.core.resources repository.

This commands says: import the org.eclipse.core.resources module into a git repository in the directory (-C) eclipse-core-resources. The -r switch says to store the loaded repository data under the cvs remote. A remote is like a git branch except you never checkout a remote directly. You'll create your own branches based on remote versions. The remote branches must be kept clean for when you next fetch updates from the remote.

With that one command you now have a fully-fledged repository waiting for you. Take a look:

cd eclipse-core-resources
git branch -a
git log

git branch -a will show all the branches -- you'll see this contains all the upstream branches, potentially a lot! You'll see that you're currently sitting in master which cvsimport has created for you tracking the cvs/master remote branch. git log shows you the full imported commit history on this branch.

Staying fresh

git cvsimport -i -v -C eclipse-core-resources -d :pserver:anonymous@dev.eclipse.org:/cvsroot/eclipse -r cvs org.eclipse.core.resources

To update your repository bringing in recent upstream changes , run the git cvsimport command again. You might want to pass the -i switch to cvsimport. This prevents git from automatically merging (pulling) changes from the remote's master into the branch you've currently checked out. If your working tree isn't clean, has diverged, or you've checked out a different branch such automatic merge may fail.

You can see changes made in a remote with git log <remote_name>/<branch_name>, and compare diffs with git diff. You can merge changes in, or if you haven't shared your branch with anyone else, rebase your branch.

Examples: Some scripts which track Eclipse/e4 core.resources and CDT are in a github repository take a look at the eclipse-sync directory and the sync.sh script. This cvsimports the projects from the Eclipse repository and pushes selected branhces (HEAD and 3_4) to github.


Git in 20 Commands http://www.kernel.org/pub/software/scm/git/docs/everyday.html

Git for Computer Scientists http://eagain.net/articles/git-for-computer-scientists/

Git Documentation home http://git-scm.com/documentation

When importing an existing repository

Using the EGit integration

Contributing to EGit

If you want to get involved with EGit, please see our Google Code project site:


Known open issues are listed here, along with the clone URL for the Git repository containing the project's code. Loading it into Eclipse is as simple as importing the existing projects from the checked-out repository. Please see SUBMITTING_PATCHES in the top level directory for information on how to send contributions in.

Known git repositories for Eclipse projects

Platform Plugins

Meetings and Resources