Using Git to Contribute to Drupal

Cloning a Module's project Git repository

How to get/update a local copy of the Git repository for a contributed module, theme, or distribution

Using live previews on Drupal Core and contrib merge requests

Drupal.org core and contrib issues now have a built in live deployment preview feature, to easily allow testing of merge requests.

Patch and merge request guidelines

Guidelines for patch names, and the changes to group into a single patch or merge request

Working with patches

How to work with patches on Drupal.org.

• Applying a patch in a feature branch
• Making a patch
• Creating an interdiff
• Rerolling patches
• Command-only full patch workflow

Setting proper file permissions before committing files

File read/write/execute permissions to use for Drupal project files

Making maintainer-friendly "git am" single and multi-patches

How to make patches that include committer information and/or multiple commits

Using git blame

How to use Git's blame command to determine when a change was made

Using a Sandbox project to collaborate

How to use a Sandbox project on drupal.org as a means for a group to collaborate on a major software change