We use the pull-request model, see GitHub's help on pull-request.

In brief, you will:

Modifying Activities

Most activity repositories can be found in our GitHub sugarlabs organization.

A few activity repositories are somewhere else; read the activity/ file, check the metadata on the app store, or the Activity page on, or our deprecated gitorious instance.

For new activities, see Write your own Sugar desktop activity, or Write your own Sugar web activity, then make a new repository in your GitHub account, put the source code in it, then ask the systems@ list to move it to the GitHub sugarlabs organization.

Modifying Sugar

Sugar repositories can be found in our GitHub sugarlabs organization. Sugar desktop environment repositories are:

Open an Issue

We track issues in or in the GitHub Issues tab of activity repositories.

Each improvement to Sugar should start with an issue discussion, to build consensus and ensure that work isn't wasted.


You should first fork the repository on GitHub. This step is needed only once. See complete help in GitHub. Brief instructions follow using sugar as example.

Navigate to the sugar repository, press Fork button, then on your computer

git clone
cd sugar
git remote add upstream
git fetch upstream


Create a branch per set of changes; e.g. to fix a problem or add a feature;

git checkout -b BRANCH-NAME

Your BRANCH-NAME can be anything, other than master. The scope is your forked repository. The branch name will be shown on pull-requests.

Making commits

Change files, and commit. When writing a commit message;

  1. start with a one line summary of the change;
  2. leave a blank line after the summary;
  3. explain the problem that is solved, unless the summary makes it obvious;
  4. when the problem was introduced by a previous commit, mention the hash;
  5. when the problem is in an issue ticket, add "Fixes #1234", and the ticket may be closed automatically; and
  6. avoid mentioning GitHub or other pull-requests, as these are not kept in git,

Make one or more commits and push the branch to your repository;

git push origin BRANCH-NAME

Sending a pull-request

Send a pull-request for your branch. Navigate to your repository page in GitHub, switch to the branch you made, and then press the Pull Request button.

When writing a pull-request message;

  1. if there is only one commit, accept the GitHub default of the commit message, otherwise explain the series of commits;
  2. mention any relevant pull-requests; and
  3. mention any relevant resources, such as issues, tickets, or competition tasks.

A review will happen in the pull-request, and a reviewer will either;

  1. merge your commits;
  2. merge your commits with their own changes;
  3. ask you to make changes; or
  4. close and reject your request giving reasons.

When they ask you for changes, you may have to change both files and commits.

When squashing commits to different files, use interactive rebase.

git rebase -i master

After resolving any conflicts, push the changes to the same branch;

git push --force origin

Then respond on the pull-request.

Keep your pull-request up to date

When there have been upstream commits while your pull-request was open, you should rebase your pull-request;

git pull --rebase upstream

Then push the changes to the same branch;

git push --force origin

The pull-request will be updated.

Keep your fork up to date

When there have been upstream commits since your fork was made, you should bring these into your fork:

git checkout master
git pull upstream
git checkout BRANCH-NAME


We encourage testing before merging a pull-request.

So instead of merging directly with the "merge" button on GitHub, we may do a local merge, then test, then push.

See GitHub help on merging a pull-request.

The GitHub page for the pull-request will provide you the right commands to do the local merge, similar to the following.

Get the changes from that branch to a new local branch:

git checkout -b SOME-USER-topic1 master
git pull topic1

Test! If everything is fine, merge:

git checkout master
git rebase SOME-USER-topic1
git push origin master

Close Issue

Once your changes are merged, you should close your issue. Be sure to thank everyone who helped you out along the way.

Frequently Asked Questions

I've used the GitHub editor, how can I rebase or amend commits?

Make a local clone of your GitHub repository, use git commit --amend or the other advanced CLI features, then git push back to GitHub.

Error 403 on git push

Most likely you have cloned someone else's repository, and you should instead fork their repository, clone your own repository, make your changes, then push. See Getting error 403 while submitting PR and D. Joe's reply.