Clone this wiki locally
Intended mainly as a guide for folks that want to contribute that may not be familiar with Git and/or GitHub, although covers some specific "Hibernate way" stuff as well.
First thing is to make sure there is a JIRA issue that covers the changes you propose. If not, create one. The Hibernate JIRA is hosted at https://hibernate.atlassian.net
Fork the repo
See http://help.github.com/fork-a-repo for details.
Completely new to Git? You may also want to check out these resources first:
Clone your fork
GitHub will prompt your with the steps to clone your fork after you have created the fork. If not, all you need is the URL which is displayed on the main repository page.
Create the working (topic) branch
Create a "topic" branch on which you will work. The convention is to name the branch using the JIRA issue key (HHH-123, for example). Assuming you will be working from master:
git checkout -b <key> master
Do yo thang
Commit the changes. Be sure to use the JIRA issue key in the commit message.
Prior to committing, if you want to pull in the latest upstream changes (highly appreciated btw), please use rebasing rather than merging. Merging creates "merge commits" that really muck up the project timeline.
This is pushing the changes to your fork of the upstream repo. Assuming the GitHub remote to your fork is named origin (which is the Git default on clone, although most people change these around based on personal taste):
git push origin HHH-123
Initiate the pull request
See http://help.github.com/send-pull-requests/ for details. After the pull request has been sent, add its URL to the JIRA as a comment.
Be sure to see https://github.com/hibernate/hibernate-orm/wiki/Jira-Report-Expectations#in-general for a discussion of what to expect.