HOW-TO check out PKP applications from git

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Revision as of 13:12, 9 February 2010 by (Talk | contribs) (Remove inconsistencies)

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This is the official process to check out OMP with the PKP library as a sub-module.

Create user

Go to and create a user account. Log in to your user account.

Delete existing personal forks

First you have to delete existing personal forks of omp/pkp-lib if you have cloned these repositories before. You obviously shouldn't do this when there are still changes in there you don't have in other locations!

  • Go to your personal github dashboard.
  • In "Your Repositories" select the forks you want to delete.
  • Go to Admin tab.
  • Down on the page click on "Delete This Repository".
  • Repeat these steps for both omp and pkp-lib

Fork the official omp/pkp-lib repositories

Clone your personal omp locally

Please replace "your-pkp-workspace" and "your-user" with the appropriate values.

cd ~/your-pkp-workspace
git clone omp

Set up pkp submodule in your local omp clone

cd omp/
git submodule init

edit .git/config with your favourite editor and find (or add if it's not there):

[submodule "lib/pkp"]
        url =

Change the url to

        url =


git submodule update

Add the official repository

The 'official' respositories can be compared to the role that PKP's old CVS repositories used to fill. Adding the official branch allows you to synchronize your code with the rest of the team, and should be pulled from before creating a patch or making a commit.


cd lib/pkp/
git remote add official git://
git checkout -b master official/master
cd ../..
git remote add official git://
git checkout -b master official/master

Create development branches

Create development branches in the main project and the sub-module. I'll use the branch "modal" here but this is arbitrary. The branch name should represent the development topic you intend to work on. Also am I assuming here that you want to develop off the master branch. There my be scenarios however where it might be more practical to develop off another developer's branch. In that case you can replace "official/master" by any other remote or local branch you want to base your work on.

git checkout -b modal official/master
cd lib/pkp/
git checkout -b modal official/master
cd ../..

Never develop directly on the master branch. We can use the master branch to track released code and tested changes.

Start pulling changes

Now you can start pulling in changes from other people's repositories. The following is just an example. See for yourself what others are working on and pull in what you need to get started.

cd lib/pkp
git remote add juan \
git pull juan modal

cd ../..
git remote add juan \
git pull juan modal

You may get merge conflicts, if the repository you pull from did not merge in all changes from CVS already. See man git-merge for more info on how to solve merge conflicts. If you want to use another developer's code without merging it into your branch, you'll want to pull their branch onto a clean branch--Switch to the master branch (use 'git stash' if you have uncommitted changes you want to save) and create a fresh branch, e.g. execute:

git stash save "Temporarily stashing code"
git checkout master
git pull official master
git checkout -b juanModal
git pull juan modal
......Play with Juan's code.......
git checkout modal
git stash pop

Make your own changes

Make your own changes, publish them to your own repository for others to pull from

touch my-new-file.tmp
git add my-new-file.tmp
git commit -m "added a useless file"
git push origin modal

Use 'git status' liberally to give you information on what files will be in the next commit, which files are marked for deletion, etc. That's all. Enjoy developing PKP applications on git!


"Git cheat sheet"