Barry Van Veen shares how you can install a package from a local path into your project. This is extremely handy when developing a package because you can immediately toy with it in a full application.
This article explains how you can require a package from a local path into your project with Composer. This way you can run a local copy of a repository and test any changes you make. Because the local repo will be symlinked changes are shared in real-time, there is no need for intermediate committing and updating.