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Welcome to the Eclipse Nebula project. We love new contributions. We provide the Eclipse community with a large set of rich UI compoments. So thank you for considering your contribution.



We use Gerrit to accept all your patches.

Get your Eclipse Credentials

To provide patches to Nebula, create an Eclipse account, get your Gerrit password and push your changes to the Gerrit git repo.

Create an Eclipse Account

Create an Eclipse Account (or use your existing one)

Sign the CLA

Sign the CLA

Access to Gerrit

When you push to our Gerrit repo you have to do that with your Gerrit user and password, not with your Eclipse password. To set your Gerrit password with your Eclipse account and then generate a password to get access to Gerrit when you are pushing a change.

Get your Gerrit password here

Alternatively, you can upload your SSH key here.

Three Ways to Setup Your IDE

To setup your IDE there are three possibilities. Using Oomph is the easiest for newcomers.

  1. Use Oomph
  2. Import our PSF file
  3. Setup manually

Import with Oomph

Use the Eclipse installer or, if you have already installed Oomph, use the Oomph import wizard and select Nebula. If Nebula is not in the list, add this setup file.

Import our PSF File

Copy and paste this file into a file.psf inside an eclipse project select it and use "Import Project Set..." from the context menu.


Clone the GIT Repo Manually

The Nebula repository settings can be found here

 C:\>git clone

Change the Push URI

Finally you need to change the target ref for push. It should change from /refs/heads/master to /refs/for/master. The config file should look like this (use properties on the repository context menu in Eclipse)

[remote "origin"]
     url =
     fetch = +refs/heads/*:refs/remotes/origin/*
     fetch = refs/notes/*:refs/notes/*
     pushurl =
     push = HEAD:refs/for/master 

You can also use "Gerrit Configuration..." in Eclipse to do this:


Start Eclipse

Open your Eclipse IDE and open the Git perspective

Add Local Git Repo

Add a local Git repository and find your freshly created repo

Configure Gerrit

Open Remotes/origin and open the context menu. Select Gerrit Configuration.

Nebula ide1.png

Review and press Finish

Nebula ide2.png

Import Projects

If you did not use the psf file then you have to use git to import the relevant projects. Import the widgets you want to work on from the widgets directory and import the first two example projects from the example directory.

Nebula proj 1.png

Run Eclipse

Create a new run configuration and press Run

Nebula ide3.png

Open Nebula Perspective

Open the Nebula perspective and find the example view for your widget and test your changes. You can also test your changes by using the widget in a snippet or in your own project.

File a bug

File a bug against the correct component and version.

Patches with a signed CLA

To provide patches to Nebula, create an Eclipse account, get your Gerrit password and push your changes to the Gerrit git repo.

Please always use a valid bugnumber and use the following commit message:

Bug bugnumber  bug description 
<empty line>
Good description of the changes you made.

Change-Id: I0000000000000000000000000000000000000000 
Signed-off-by: Wim Jongman <>

To update an Existing commit, use the change Id that Gerrit has created for your original commit:

Bug bugnumber  bug description 
<empty line>
Good description of the changes you made.

Change-Id: yaddieyaddieyaddieyaddieyaddieyaddieyaddieyaddie
Signed-off-by: Wim Jongman <>

Patches without a signed CLA

We cannot accept patches, in any form, without a signed CLA.

Building on our build server

Every patch you supply with Gerrit gets build immediately. You can find the Gerrit jobs here which also includes the build repository.

Building locally

To build locally refer to the builds page

New Committers

Before you decide to contribute your code to Eclipse, keep in mind that your code must follow the EPL, Eclipse's Public License. This means that committers and contributors need to follow some rules.

A good overview of what this entails and how this affects you can be read here.

There are a number of ways you can contribute.

  1. A new project inside Nebula
  2. New widgets in the Nebula Release project (production ready).
  3. New widgets in the Nebula Incubation project.
  4. Maintain existing widgets

If you choose the first option please contact the Nebula lead through the mailing list and make your intentions clear. Then continue to read on this page.

New Widgets

The new widget process is described here:

Nebula/Contributions/New Widgets

Introduce Yourself

If we don't know you, please take the time to introduce yourself to the Nebula mailing list. Be elaborate. Things that you talk about could be your contributions, the bugs that you have filed, the patches that you committed, your experience in UI development, etcetera. We need to know that you are a the kind of person that we want to have on board. If you are not comfortable with this, it could also be enough to point to the code that you want to contribute and tell us how this could be useful to the greater Nebula community.

You can subscribe to the mailing list by writing a mail to the mailing list administrator. How this is done is all explained on this page. Tell us what your plans are and what your UI component does. Then wait for the discussion. If nothing happens immediately: be patient and persistent. We love new contributions.

Code Quality and Citizenship

Once part of the Nebula project, your code is visible to thousands of developers. Make sure that you provide quality code. Also make sure that your widget is stable even if your API is not. The work that you provide represents the complete Nebula community. Ask on the list if you are not sure. Take a look at the widget author tips. The user interface is a very important part of any application.

Once you are in the project, take care of your bug reports and make sure that they are followed up. We require that you do not only take care of your own component but also look after the greater Nebula together with the other active committers.

Add Documentation to the Wiki

Your component needs to be documented on the main Nebula wiki page.

Watch nebula-inbox

It is required that all committers watch this email address in bugzilla to stay up to date with what is going on in our community. Please login to bugzilla and then change your users-watching settings here:

Become a committer

If you do not provide a new widget contribution but still want to become a Nebula committer then the following applies:

Based on your role in the Eclipse community you can become a full committer in the Nebula project. For this you have to show commitment to the project by maintaining your code and play an active role in the Nebula community as a whole. Once this is established, you are invited by one of current committers of the Nebula project to become a committer. If you feel that you are ready for full committer status but you are not yet invited, you can solicit for the position yourself either through the list or by personal mail to the project lead.

The voting process is a formality but you cannot have any votes against you (-1). Once you are voted in (three or more +1), you will be provided with an Eclipse committer ID by the Eclipse Webmasters.

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