How to contribute patches to Tycho
First, read Developing Tycho .
If you want to do an enhancement but don't know where to start or if it's going in the right direction, just ask on [] and we will help. If the patch is not trivial, make sure you include a test case that reproduces the bug or proves that the ehhancement works.
Tycho has two types of tests: unit tests (locally in each module) and a global integration test suite in tycho-its.
Unit tests are preferred if possible because they are in general much faster and better targeted at the functionality under test. Integration tests generally use maven to build a sample project and then do some assertions on the build output.
See examples for unit tests and integration tests.
We prefer git patches created with git format-patch since they preserve a commit message as well as author information. This gives you the credit you deserve in the git history.