Using submodules and subrepositories

This post introduces the concept and implementation of Git submodules and Mercurial subrepositories within SourceTree 1.3. It details how to add submodules by specifying a source URL and path, and how these appear in the SourceTree sidebar. The post explains how to commit these additions to the parent repository. It also covers typical submodule tasks: changing the tracked commit by updating the submodule and committing the change in the parent repository, committing/pushing changes to submodules alongside the parent repository (with specific handling for Git and Mercurial), and changing the source URL of a submodule. The post highlights the benefits of this feature for managing project dependencies.